Merge tag 'staging-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging/IIO driver updates from Greg KH:
 "Here is the big staging and IIO driver pull request for 4.20-rc1.

  There are lots of things here, we ended up adding more lines than
  removing, thanks to a large influx of Comedi National Instrument
  device support. Someday soon we need to get comedi out of staging...

  Other than the comedi drivers, the "big" things here are:

   - new iio drivers

   - delete dgnc driver (no one used it and no one had the hardware
     anymore)

   - vbox driver updates and fixes

   - erofs fixes

   - tons and tons of tiny checkpatch fixes for almost all staging
     drivers

  All of these have been in linux-next, with the last few happening a
  bit "late" due to them getting stuck on my laptop during travel to the
  Mantainers summit"

* tag 'staging-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (690 commits)
  staging: gasket: Fix sparse "incorrect type in assignment" warnings.
  staging: gasket: remove debug logs for callback invocation
  staging: gasket: remove debug logs in page table mapping calls
  staging: rtl8188eu: core: Use sizeof(*p) instead of sizeof(struct P) for memory allocation
  staging: ks7010: Remove extra blank line
  staging: gasket: Remove extra blank line
  staging: media: davinci_vpfe: Fix spelling mistake in enum
  staging: speakup: Add a pair of braces
  staging: wlan-ng: Replace long int with long
  staging: MAINTAINERS: remove obsolete IPX staging directory
  staging: MAINTAINERS: remove NCP filesystem entry
  staging: rtl8188eu: cleanup comparsions to false
  staging: gasket: Update device virtual address comment
  staging: gasket: sysfs: fix attribute release comment
  staging: gasket: apex: fix sysfs_show
  staging: gasket: page_table: simplify gasket_components_to_dev_address
  staging: gasket: page_table: fix comment in components_to_dev_address
  staging: gasket: page table: fixup error path allocating coherent mem
  staging: gasket: page_table: rearrange gasket_page_table_entry
  staging: gasket: page_table: remove unnecessary PTE status set to free
  ...

Documentation/ABI/testing/sysfs-bus-iio

@@ -199,7 +199,7 @@ Description:
 
 What:		/sys/bus/iio/devices/iio:deviceX/in_positionrelative_x_raw
 What:		/sys/bus/iio/devices/iio:deviceX/in_positionrelative_y_raw
-KernelVersion:	4.18
+KernelVersion:	4.19
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Relative position in direction x or y on a pad (may be

Documentation/devicetree/bindings/iio/accel/adxl372.txt

@@ -0,0 +1,33 @@
+Analog Devices ADXL372 3-Axis, +/-(200g) Digital Accelerometer
+
+http://www.analog.com/media/en/technical-documentation/data-sheets/adxl372.pdf
+
+Required properties:
+ - compatible : should be "adi,adxl372"
+ - reg: the I2C address or SPI chip select number for the device
+
+Required properties for SPI bus usage:
+ - spi-max-frequency: Max SPI frequency to use
+
+Optional properties:
+ - interrupts: interrupt mapping for IRQ as documented in
+   Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+
+Example for a I2C device node:
+
+	accelerometer@53 {
+		compatible = "adi,adxl372";
+		reg = <0x53>;
+		interrupt-parent = <&gpio>;
+		interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
+	};
+
+Example for a SPI device node:
+
+	accelerometer@0 {
+		compatible = "adi,adxl372";
+		reg = <0>;
+		spi-max-frequency = <1000000>;
+		interrupt-parent = <&gpio>;
+		interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
+	};

Documentation/devicetree/bindings/iio/adc/mcp3911.txt

@@ -0,0 +1,30 @@
+* Microchip MCP3911 Dual channel analog front end (ADC)
+
+Required properties:
+ - compatible: Should be "microchip,mcp3911"
+ - reg: SPI chip select number for the device
+
+Recommended properties:
+ - spi-max-frequency: Definition as per
+	 Documentation/devicetree/bindings/spi/spi-bus.txt.
+	 Max frequency for this chip is 20MHz.
+
+Optional properties:
+ - clocks: Phandle and clock identifier for sampling clock
+ - interrupt-parent: Phandle to the parent interrupt controller
+ - interrupts: IRQ line for the ADC
+ - microchip,device-addr: Device address when multiple MCP3911 chips are present on the
+	same SPI bus. Valid values are 0-3. Defaults to 0.
+ - vref-supply: Phandle to the external reference voltage supply.
+
+Example:
+adc@0 {
+	compatible = "microchip,mcp3911";
+	reg = <0>;
+	interrupt-parent = <&gpio5>;
+	interrupts = <15 IRQ_TYPE_EDGE_RISING>;
+	spi-max-frequency = <20000000>;
+	microchip,device-addr = <0>;
+	vref-supply = <&vref_reg>;
+	clocks = <&xtal>;
+};

Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt

@@ -1,7 +1,9 @@
-Qualcomm's SPMI PMIC voltage ADC
+Qualcomm's SPMI PMIC ADC
 
-SPMI PMIC voltage ADC (VADC) provides interface to clients to read
-voltage. The VADC is a 15-bit sigma-delta ADC.
+- SPMI PMIC voltage ADC (VADC) provides interface to clients to read
+  voltage. The VADC is a 15-bit sigma-delta ADC.
+- SPMI PMIC5 voltage ADC (ADC) provides interface to clients to read
+  voltage. The VADC is a 16-bit sigma-delta ADC.
 
 VADC node:
 
@@ -9,11 +11,13 @@ VADC node:
     Usage: required
     Value type: <string>
     Definition: Should contain "qcom,spmi-vadc".
+                Should contain "qcom,spmi-adc5" for PMIC5 ADC driver.
+                Should contain "qcom,spmi-adc-rev2" for PMIC rev2 ADC driver.
 
 - reg:
     Usage: required
     Value type: <prop-encoded-array>
-    Definition: VADC base address and length in the SPMI PMIC register map.
+    Definition: VADC base address in the SPMI PMIC register map.
 
 - #address-cells:
     Usage: required
@@ -45,13 +49,26 @@ Channel node properties:
     Definition: ADC channel number.
             See include/dt-bindings/iio/qcom,spmi-vadc.h
 
+- label:
+    Usage: required for "qcom,spmi-adc5" and "qcom,spmi-adc-rev2"
+    Value type: <empty>
+    Definition: ADC input of the platform as seen in the schematics.
+            For thermistor inputs connected to generic AMUX or GPIO inputs
+            these can vary across platform for the same pins. Hence select
+            the platform schematics name for this channel.
+
 - qcom,decimation:
     Usage: optional
     Value type: <u32>
     Definition: This parameter is used to decrease ADC sampling rate.
             Quicker measurements can be made by reducing decimation ratio.
-            Valid values are 512, 1024, 2048, 4096.
-            If property is not found, default value of 512 will be used.
+            - For compatible property "qcom,spmi-vadc", valid values are
+              512, 1024, 2048, 4096. If property is not found, default value
+              of 512 will be used.
+            - For compatible property "qcom,spmi-adc5", valid values are 250, 420
+              and 840. If property is not found, default value of 840 is used.
+            - For compatible property "qcom,spmi-adc-rev2", valid values are 256,
+              512 and 1024. If property is not present, default value is 1024.
 
 - qcom,pre-scaling:
     Usage: optional
@@ -66,21 +83,38 @@ Channel node properties:
 - qcom,ratiometric:
     Usage: optional
     Value type: <empty>
-    Definition: Channel calibration type. If this property is specified
-            VADC will use the VDD reference (1.8V) and GND for channel
-            calibration. If property is not found, channel will be
-            calibrated with 0.625V and 1.25V reference channels, also
-            known as absolute calibration.
+    Definition: Channel calibration type.
+            - For compatible property "qcom,spmi-vadc", if this property is
+              specified VADC will use the VDD reference (1.8V) and GND for
+              channel calibration. If property is not found, channel will be
+              calibrated with 0.625V and 1.25V reference channels, also
+              known as absolute calibration.
+            - For compatible property "qcom,spmi-adc5" and "qcom,spmi-adc-rev2",
+              if this property is specified VADC will use the VDD reference
+              (1.875V) and GND for channel calibration. If property is not found,
+              channel will be calibrated with 0V and 1.25V reference channels,
+              also known as absolute calibration.
 
 - qcom,hw-settle-time:
     Usage: optional
     Value type: <u32>
     Definition: Time between AMUX getting configured and the ADC starting
-            conversion. Delay = 100us * (value) for value < 11, and
-            2ms * (value - 10) otherwise.
-            Valid values are: 0, 100, 200, 300, 400, 500, 600, 700, 800,
-            900 us and 1, 2, 4, 6, 8, 10 ms
-            If property is not found, channel will use 0us.
+            conversion. The 'hw_settle_time' is an index used from valid values
+            and programmed in hardware to achieve the hardware settling delay.
+            - For compatible property "qcom,spmi-vadc" and "qcom,spmi-adc-rev2",
+              Delay = 100us * (hw_settle_time) for hw_settle_time < 11,
+              and 2ms * (hw_settle_time - 10) otherwise.
+              Valid values are: 0, 100, 200, 300, 400, 500, 600, 700, 800,
+              900 us and 1, 2, 4, 6, 8, 10 ms.
+              If property is not found, channel will use 0us.
+            - For compatible property "qcom,spmi-adc5", delay = 15us for
+              value 0, 100us * (value) for values < 11,
+              and 2ms * (value - 10) otherwise.
+              Valid values are: 15, 100, 200, 300, 400, 500, 600, 700, 800,
+              900 us and 1, 2, 4, 6, 8, 10 ms
+              Certain controller digital versions have valid values of
+              15, 100, 200, 300, 400, 500, 600, 700, 1, 2, 4, 8, 16, 32, 64, 128 ms
+              If property is not found, channel will use 15us.
 
 - qcom,avg-samples:
     Usage: optional
@@ -89,13 +123,18 @@ Channel node properties:
             Averaging provides the option to obtain a single measurement
             from the ADC that is an average of multiple samples. The value
             selected is 2^(value).
-            Valid values are: 1, 2, 4, 8, 16, 32, 64, 128, 256, 512
-            If property is not found, 1 sample will be used.
+            - For compatible property "qcom,spmi-vadc", valid values
+              are: 1, 2, 4, 8, 16, 32, 64, 128, 256, 512
+              If property is not found, 1 sample will be used.
+            - For compatible property "qcom,spmi-adc5" and "qcom,spmi-adc-rev2",
+              valid values are: 1, 2, 4, 8, 16
+              If property is not found, 1 sample will be used.
 
 NOTE:
 
-Following channels, also known as reference point channels, are used for
-result calibration and their channel configuration nodes should be defined:
+For compatible property "qcom,spmi-vadc" following channels, also known as
+reference point channels, are used for result calibration and their channel
+configuration nodes should be defined:
 VADC_REF_625MV and/or VADC_SPARE1(based on PMIC version) VADC_REF_1250MV,
 VADC_GND_REF and VADC_VDD_VADC.
 
@@ -104,7 +143,7 @@ Example:
 	/* VADC node */
 	pmic_vadc: vadc@3100 {
 		compatible = "qcom,spmi-vadc";
-		reg = <0x3100 0x100>;
+		reg = <0x3100>;
 		interrupts = <0x0 0x31 0x0 IRQ_TYPE_EDGE_RISING>;
 		#address-cells = <1>;
 		#size-cells = <0>;

Documentation/devicetree/bindings/iio/adc/sprd,sc27xx-adc.txt

@@ -12,6 +12,8 @@ Required properties:
 - interrupts: The interrupt number for the ADC device.
 - #io-channel-cells: Number of cells in an IIO specifier.
 - hwlocks: Reference to a phandle of a hwlock provider node.
+- nvmem-cells: A phandle to the calibration cells provided by eFuse device.
+- nvmem-cell-names: Should be "big_scale_calib", "small_scale_calib".
 
 Example:
 
@@ -32,5 +34,7 @@ Example:
 			interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
 			#io-channel-cells = <1>;
 			hwlocks = <&hwlock 4>;
+			nvmem-cells = <&adc_big_scale>, <&adc_small_scale>;
+			nvmem-cell-names = "big_scale_calib", "small_scale_calib";
 		};
 	};

Documentation/devicetree/bindings/iio/dac/ad5758.txt

@@ -50,6 +50,9 @@ Required properties:
 
 Optional properties:
 
+ - reset-gpios : GPIO spec for the RESET pin. If specified, it will be
+		 asserted during driver probe.
+
  - adi,dc-dc-ilim-microamp: The dc-to-dc converter current limit
 		   The following values are currently supported [uA]:
 			* 150000
@@ -71,6 +74,8 @@ AD5758 Example:
 		spi-max-frequency = <1000000>;
 		spi-cpha;
 
+		reset-gpios = <&gpio 22 0>;
+
 		adi,dc-dc-mode = <2>;
 		adi,range-microvolt = <0 10000000>;
 		adi,dc-dc-ilim-microamp = <200000>;

Documentation/devicetree/bindings/iio/dac/ltc1660.txt

@@ -0,0 +1,21 @@
+* Linear Technology Micropower octal 8-Bit and 10-Bit DACs
+
+Required properties:
+ - compatible: Must be one of the following:
+		"lltc,ltc1660"
+		"lltc,ltc1665"
+ - reg: SPI chip select number for the device
+ - vref-supply: Phandle to the voltage reference supply
+
+Recommended properties:
+ - spi-max-frequency: Definition as per
+	 Documentation/devicetree/bindings/spi/spi-bus.txt.
+	 Max frequency for this chip is 5 MHz.
+
+Example:
+dac@0 {
+	compatible = "lltc,ltc1660";
+	reg = <0>;
+	spi-max-frequency = <5000000>;
+	vref-supply = <&vref_reg>;
+};

Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt

@@ -20,6 +20,7 @@ Required properties:
   bindings.
 
 Optional properties:
+ - vddio-supply: regulator phandle for VDDIO supply
  - mount-matrix: an optional 3x3 mounting rotation matrix
  - i2c-gate node.  These devices also support an auxiliary i2c bus.  This is
    simple enough to be described using the i2c-gate binding. See

Documentation/devicetree/bindings/iio/imu/st_lsm6dsx.txt

@@ -7,6 +7,7 @@ Required properties:
   "st,lsm6dsl"
   "st,lsm6dsm"
   "st,ism330dlc"
+  "st,lsm6dso"
 - reg: i2c address of the sensor / spi cs line
 
 Optional properties:

Documentation/devicetree/bindings/iio/light/bh1750.txt

@@ -0,0 +1,18 @@
+ROHM BH1750 - ALS, Ambient light sensor
+
+Required properties:
+
+- compatible: Must be one of:
+    "rohm,bh1710"
+    "rohm,bh1715"
+    "rohm,bh1721"
+    "rohm,bh1750"
+    "rohm,bh1751"
+- reg: the I2C address of the sensor
+
+Example:
+
+light-sensor@23 {
+	compatible = "rohm,bh1750";
+	reg = <0x23>;
+};

Documentation/devicetree/bindings/iio/light/tsl2772.txt

@@ -0,0 +1,42 @@
+* AMS/TAOS ALS and proximity sensor
+
+Required properties:
+
+  - compatible: Should be one of
+		"amstaos,tsl2571"
+		"amstaos,tsl2671"
+		"amstaos,tmd2671"
+		"amstaos,tsl2771"
+		"amstaos,tmd2771"
+		"amstaos,tsl2572"
+		"amstaos,tsl2672"
+		"amstaos,tmd2672"
+		"amstaos,tsl2772"
+		"amstaos,tmd2772"
+		"avago,apds9930"
+  - reg: the I2C address of the device
+
+Optional properties:
+
+  - amstaos,proximity-diodes - proximity diodes to enable. <0>, <1>, or <0 1>
+                               are the only valid values.
+  - led-max-microamp - current for the proximity LED. Must be 100000, 50000,
+                       25000, or 13000.
+  - vdd-supply: phandle to the regulator that provides power to the sensor.
+  - vddio-supply: phandle to the regulator that provides power to the bus.
+  - interrupts: the sole interrupt generated by the device
+
+  Refer to interrupt-controller/interrupts.txt for generic interrupt client
+  node bindings.
+
+Example:
+
+tsl2772@39 {
+	compatible = "amstaos,tsl2772";
+	reg = <0x39>;
+	interrupts-extended = <&msmgpio 61 IRQ_TYPE_EDGE_FALLING>;
+	vdd-supply = <&pm8941_l17>;
+	vddio-supply = <&pm8941_lvs1>;
+	amstaos,proximity-diodes = <0>;
+	led-max-microamp = <100000>;
+};

Documentation/devicetree/bindings/iio/proximity/vl53l0x.txt

@@ -0,0 +1,12 @@
+ST VL53L0X ToF ranging sensor
+
+Required properties:
+	- compatible: must be "st,vl53l0x"
+	- reg: i2c address where to find the device
+
+Example:
+
+vl53l0x@29 {
+	compatible = "st,vl53l0x";
+	reg = <0x29>;
+};

Documentation/devicetree/bindings/trivial-devices.txt

@@ -21,16 +21,6 @@ adi,adt7490		+/-1C TDM Extended Temp Range I.C
 adi,adxl345		Three-Axis Digital Accelerometer
 adi,adxl346		Three-Axis Digital Accelerometer (backward-compatibility value "adi,adxl345" must be listed too)
 ams,iaq-core		AMS iAQ-Core VOC Sensor
-amstaos,tsl2571		AMS/TAOS ALS and proximity sensor
-amstaos,tsl2671		AMS/TAOS ALS and proximity sensor
-amstaos,tmd2671		AMS/TAOS ALS and proximity sensor
-amstaos,tsl2771		AMS/TAOS ALS and proximity sensor
-amstaos,tmd2771		AMS/TAOS ALS and proximity sensor
-amstaos,tsl2572		AMS/TAOS ALS and proximity sensor
-amstaos,tsl2672		AMS/TAOS ALS and proximity sensor
-amstaos,tmd2672		AMS/TAOS ALS and proximity sensor
-amstaos,tsl2772		AMS/TAOS ALS and proximity sensor
-amstaos,tmd2772		AMS/TAOS ALS and proximity sensor
 at,24c08		i2c serial eeprom  (24cxx)
 atmel,at97sc3204t	i2c trusted platform module (TPM)
 capella,cm32181		CM32181: Ambient Light Sensor

Documentation/filesystems/pohmelfs/design_notes.txt

@@ -1,72 +0,0 @@
-POHMELFS: Parallel Optimized Host Message Exchange Layered File System.
-
-		Evgeniy Polyakov <zbr@ioremap.net>
-
-Homepage: http://www.ioremap.net/projects/pohmelfs
-
-POHMELFS first began as a network filesystem with coherent local data and
-metadata caches but is now evolving into a parallel distributed filesystem.
-
-Main features of this FS include:
- * Locally coherent cache for data and metadata with (potentially) byte-range locks.
-	Since all Linux filesystems lock the whole inode during writing, algorithm
-	is very simple and does not use byte-ranges, although they are sent in
-	locking messages.
- * Completely async processing of all events except creation of hard and symbolic
-	links, and rename events.
-	Object creation and data reading and writing are processed asynchronously.
- * Flexible object architecture optimized for network processing.
-	Ability to create long paths to objects and remove arbitrarily huge
-	directories with a single network command.
-	(like removing the whole kernel tree via a single network command).
- * Very high performance.
- * Fast and scalable multithreaded userspace server. Being in userspace it works
-	with any underlying filesystem and still is much faster than async in-kernel NFS one.
- * Client is able to switch between different servers (if one goes down, client
-	automatically reconnects to second and so on).
- * Transactions support. Full failover for all operations.
-	Resending transactions to different servers on timeout or error.
- * Read request (data read, directory listing, lookup requests) balancing between multiple servers.
- * Write requests are replicated to multiple servers and completed only when all of them are acked.
- * Ability to add and/or remove servers from the working set at run-time.
- * Strong authentication and possible data encryption in network channel.
- * Extended attributes support.
-
-POHMELFS is based on transactions, which are potentially long-standing objects that live
-in the client's memory. Each transaction contains all the information needed to process a given
-command (or set of commands, which is frequently used during data writing: single transactions
-can contain creation and data writing commands). Transactions are committed by all the servers
-to which they are sent and, in case of failures, are eventually resent or dropped with an error.
-For example, reading will return an error if no servers are available.
-
-POHMELFS uses a asynchronous approach to data processing. Courtesy of transactions, it is
-possible to detach replies from requests and, if the command requires data to be received, the
-caller sleeps waiting for it. Thus, it is possible to issue multiple read commands to different
-servers and async threads will pick up replies in parallel, find appropriate transactions in the
-system and put the data where it belongs (like the page or inode cache).
-
-The main feature of POHMELFS is writeback data and the metadata cache.
-Only a few non-performance critical operations use the write-through cache and
-are synchronous: hard and symbolic link creation, and object rename. Creation,
-removal of objects and data writing are asynchronous and are sent to
-the server during system writeback. Only one writer at a time is allowed for any
-given inode, which is guarded by an appropriate locking protocol.
-Because of this feature, POHMELFS is extremely fast at metadata intensive
-workloads and can fully utilize the bandwidth to the servers when doing bulk
-data transfers.
-
-POHMELFS clients operate with a working set of servers and are capable of balancing read-only
-operations (like lookups or directory listings) between them according to IO priorities.
-Administrators can add or remove servers from the set at run-time via special commands (described
-in Documentation/filesystems/pohmelfs/info.txt file). Writes are replicated to all servers, which
-are connected with write permission turned on. IO priority and permissions can be changed in
-run-time.
-
-POHMELFS is capable of full data channel encryption and/or strong crypto hashing.
-One can select any kernel supported cipher, encryption mode, hash type and operation mode
-(hmac or digest). It is also possible to use both or neither (default). Crypto configuration
-is checked during mount time and, if the server does not support it, appropriate capabilities
-will be disabled or mount will fail (if 'crypto_fail_unsupported' mount option is specified).
-Crypto performance heavily depends on the number of crypto threads, which asynchronously perform
-crypto operations and send the resulting data to server or submit it up the stack. This number
-can be controlled via a mount option.

Documentation/filesystems/pohmelfs/info.txt

@@ -1,99 +0,0 @@
-POHMELFS usage information.
-
-Mount options.
-All but index, number of crypto threads and maximum IO size can changed via remount.
-
-idx=%u
- Each mountpoint is associated with a special index via this option.
- Administrator can add or remove servers from the given index, so all mounts,
- which were attached to it, are updated.
- Default it is 0.
-
-trans_scan_timeout=%u
- This timeout, expressed in milliseconds, specifies time to scan transaction
- trees looking for stale requests, which have to be resent, or if number of
- retries exceed specified limit, dropped with error.
- Default is 5 seconds.
-
-drop_scan_timeout=%u
- Internal timeout, expressed in milliseconds, which specifies how frequently
- inodes marked to be dropped are freed. It also specifies how frequently
- the system checks that servers have to be added or removed from current working set.
- Default is 1 second.
-
-wait_on_page_timeout=%u
- Number of milliseconds to wait for reply from remote server for data reading command.
- If this timeout is exceeded, reading returns an error.
- Default is 5 seconds.
-
-trans_retries=%u
- This is the number of times that a transaction will be resent to a server that did
- not answer for the last @trans_scan_timeout milliseconds.
- When the number of resends exceeds this limit, the transaction is completed with error.
- Default is 5 resends.
-
-crypto_thread_num=%u
- Number of crypto processing threads. Threads are used both for RX and TX traffic.
- Default is 2, or no threads if crypto operations are not supported.
-
-trans_max_pages=%u
- Maximum number of pages in a single transaction. This parameter also controls
- the number of pages,  allocated for crypto processing (each crypto thread has
- pool of pages, the number of which is equal to 'trans_max_pages'.
- Default is 100 pages.
-
-crypto_fail_unsupported
- If specified, mount will fail if the server does not support requested crypto operations.
- By default mount will disable non-matching crypto operations.
-
-mcache_timeout=%u
- Maximum number of milliseconds to wait for the mcache objects to be processed.
- Mcache includes locks (given lock should be granted by server), attributes (they should be
- fully received in the given timeframe).
- Default is 5 seconds.
-
-Usage examples.
-
-Add server server1.net:1025 into the working set with index $idx
-with appropriate hash algorithm and key file and cipher algorithm, mode and key file:
-$cfg A add -a server1.net -p 1025 -i $idx -K $hash_key -k $cipher_key
-
-Mount filesystem with given index $idx to /mnt mountpoint.
-Client will connect to all servers specified in the working set via previous command:
-mount -t pohmel -o idx=$idx q /mnt
-
-Change permissions to read-only (-I 1 option, '-I 2' - write-only, 3 - rw):
-$cfg A modify -a server1.net -p 1025 -i $idx -I 1
-
-Change IO priority to 123 (node with the highest priority gets read requests).
-$cfg A modify -a server1.net -p 1025 -i $idx -P 123
-
-One can check currect status of all connections in the mountstats file:
-# cat /proc/$PID/mountstats
-...
-device none mounted on /mnt with fstype pohmel
-idx addr(:port) socket_type protocol active priority permissions
-0 server1.net:1026 1 6 1 250 1
-0 server2.net:1025 1 6 1 123 3
-
-Server installation.
-
-Creating a server, which listens at port 1025 and 0.0.0.0 address.
-Working root directory (note, that server chroots there, so you have to have appropriate permissions)
-is set to /mnt, server will negotiate hash/cipher with client, in case client requested it, there
-are appropriate key files.
-Number of working threads is set to 10.
-
-# ./fserver -a 0.0.0.0 -p 1025 -r /mnt -w 10 -K hash_key -k cipher_key
-
- -A 6			 - listen on ipv6 address. Default: Disabled.
- -r root                 - path to root directory. Default: /tmp.
- -a addr                 - listen address. Default: 0.0.0.0.
- -p port                 - listen port. Default: 1025.
- -w workers              - number of workers per connected client. Default: 1.
- -K file		 - hash key size. Default: none.
- -k file		 - cipher key size. Default: none.
- -h                      - this help.
-
-Number of worker threads specifies how many workers will be created for each client.
-Bulk single-client transafers usually are better handled with smaller number (like 1-3).

Documentation/filesystems/pohmelfs/network_protocol.txt

@@ -1,227 +0,0 @@
-POHMELFS network protocol.
-
-Basic structure used in network communication is following command:
-
-struct netfs_cmd
-{
-	__u16			cmd;	/* Command number */
-	__u16			csize;	/* Attached crypto information size */
-	__u16			cpad;	/* Attached padding size */
-	__u16			ext;	/* External flags */
-	__u32			size;	/* Size of the attached data */
-	__u32			trans;	/* Transaction id */
-	__u64			id;	/* Object ID to operate on. Used for feedback.*/
-	__u64			start;	/* Start of the object. */
-	__u64			iv;	/* IV sequence */
-	__u8			data[0];
-};
-
-Commands can be embedded into transaction command (which in turn has own command),
-so one can extend protocol as needed without breaking backward compatibility as long
-as old commands are supported. All string lengths include tail 0 byte.
-
-All commands are transferred over the network in big-endian. CPU endianness is used at the end peers.
-
-@cmd - command number, which specifies command to be processed. Following
-	commands are used currently:
-
-	NETFS_READDIR	= 1,	/* Read directory for given inode number */
-	NETFS_READ_PAGE,	/* Read data page from the server */
-	NETFS_WRITE_PAGE,	/* Write data page to the server */
-	NETFS_CREATE,		/* Create directory entry */
-	NETFS_REMOVE,		/* Remove directory entry */
-	NETFS_LOOKUP,		/* Lookup single object */
-	NETFS_LINK,		/* Create a link */
-	NETFS_TRANS,		/* Transaction */
-	NETFS_OPEN,		/* Open intent */
-	NETFS_INODE_INFO,	/* Metadata cache coherency synchronization message */
-	NETFS_PAGE_CACHE,	/* Page cache invalidation message */
-	NETFS_READ_PAGES,	/* Read multiple contiguous pages in one go */
-	NETFS_RENAME,		/* Rename object */
-	NETFS_CAPABILITIES,	/* Capabilities of the client, for example supported crypto */
-	NETFS_LOCK,		/* Distributed lock message */
-	NETFS_XATTR_SET,	/* Set extended attribute */
-	NETFS_XATTR_GET,	/* Get extended attribute */
-
-@ext - external flags. Used by different commands to specify some extra arguments
-	like partial size of the embedded objects or creation flags.
-
-@size - size of the attached data. For NETFS_READ_PAGE and NETFS_READ_PAGES no data is attached,
-	but size of the requested data is incorporated here. It does not include size of the command
-	header (struct netfs_cmd) itself.
-
-@id - id of the object this command operates on. Each command can use it for own purpose.
-
-@start - start of the object this command operates on. Each command can use it for own purpose.
-
-@csize, @cpad - size and padding size of the (attached if needed) crypto information.
-
-Command specifications.
-
-@NETFS_READDIR
-This command is used to sync content of the remote dir to the client.
-
-@ext - length of the path to object.
-@size - the same.
-@id - local inode number of the directory to read.
-@start - zero.
-
-
-@NETFS_READ_PAGE
-This command is used to read data from remote server.
-Data size does not exceed local page cache size.
-
-@id - inode number.
-@start - first byte offset.
-@size - number of bytes to read plus length of the path to object.
-@ext - object path length.
-
-
-@NETFS_CREATE
-Used to create object.
-It does not require that all directories on top of the object were
-already created, it will create them automatically. Each object has
-associated @netfs_path_entry data structure, which contains creation
-mode (permissions and type) and length of the name as long as name itself.
-
-@start - 0
-@size - size of the all data structures needed to create a path
-@id - local inode number
-@ext - 0
-
-
-@NETFS_REMOVE
-Used to remove object.
-
-@ext - length of the path to object.
-@size - the same.
-@id - local inode number.
-@start - zero.
-
-
-@NETFS_LOOKUP
-Lookup information about object on server.
-
-@ext - length of the path to object.
-@size - the same.
-@id - local inode number of the directory to look object in.
-@start - local inode number of the object to look at.
-
-
-@NETFS_LINK
-Create hard of symlink.
-Command is sent as "object_path|target_path".
-
-@size - size of the above string.
-@id - parent local inode number.
-@start - 1 for symlink, 0 for hardlink.
-@ext - size of the "object_path" above.
-
-
-@NETFS_TRANS
-Transaction header.
-
-@size - incorporates all embedded command sizes including theirs header sizes.
-@start - transaction generation number - unique id used to find transaction.
-@ext - transaction flags. Unused at the moment.
-@id - 0.
-
-
-@NETFS_OPEN
-Open intent for given transaction.
-
-@id - local inode number.
-@start - 0.
-@size - path length to the object.
-@ext - open flags (O_RDWR and so on).
-
-
-@NETFS_INODE_INFO
-Metadata update command.
-It is sent to servers when attributes of the object are changed and received
-when data or metadata were updated. It operates with the following structure:
-
-struct netfs_inode_info
-{
-	unsigned int		mode;
-	unsigned int		nlink;
-	unsigned int		uid;
-	unsigned int		gid;
-	unsigned int		blocksize;
-	unsigned int		padding;
-	__u64			ino;
-	__u64			blocks;
-	__u64			rdev;
-	__u64			size;
-	__u64			version;
-};
-
-It effectively mirrors stat(2) returned data.
-
-
-@ext - path length to the object.
-@size - the same plus size of the netfs_inode_info structure.
-@id - local inode number.
-@start - 0.
-
-
-@NETFS_PAGE_CACHE
-Command is only received by clients. It contains information about
-page to be marked as not up-to-date.
-
-@id - client's inode number.
-@start - last byte of the page to be invalidated. If it is not equal to
-	current inode size, it will be vmtruncated().
-@size - 0
-@ext - 0
-
-
-@NETFS_READ_PAGES
-Used to read multiple contiguous pages in one go.
-
-@start - first byte of the contiguous region to read.
-@size - contains of two fields: lower 8 bits are used to represent page cache shift
-	used by client, another 3 bytes are used to get number of pages.
-@id - local inode number.
-@ext - path length to the object.
-
-
-@NETFS_RENAME
-Used to rename object.
-Attached data is formed into following string: "old_path|new_path".
-
-@id - local inode number.
-@start - parent inode number.
-@size - length of the above string.
-@ext - length of the old path part.
-
-
-@NETFS_CAPABILITIES
-Used to exchange crypto capabilities with server.
-If crypto capabilities are not supported by server, then client will disable it
-or fail (if 'crypto_fail_unsupported' mount options was specified).
-
-@id - superblock index. Used to specify crypto information for group of servers.
-@size - size of the attached capabilities structure.
-@start - 0.
-@size - 0.
-@scsize - 0.
-
-@NETFS_LOCK
-Used to send lock request/release messages. Although it sends byte range request
-and is capable of flushing pages based on that, it is not used, since all Linux
-filesystems lock the whole inode.
-
-@id - lock generation number.
-@start - start of the locked range.
-@size - size of the locked range.
-@ext - lock type: read/write. Not used actually. 15'th bit is used to determine,
-	if it is lock request (1) or release (0).
-
-@NETFS_XATTR_SET
-@NETFS_XATTR_GET
-Used to set/get extended attributes for given inode.
-@id - attribute generation number or xattr setting type
-@start - size of the attribute (request or attached)
-@size - name length, path len and data size for given attribute
-@ext - path length for given object

MAINTAINERS

@@ -549,6 +549,15 @@ W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/input/misc/adxl34x.c
 
+ADXL372 THREE-AXIS DIGITAL ACCELEROMETER DRIVER
+M:	Stefan Popa <stefan.popa@analog.com>
+W:	http://ez.analog.com/community/linux-device-drivers
+S:	Supported
+F:	drivers/iio/accel/adxl372.c
+F:	drivers/iio/accel/adxl372_spi.c
+F:	drivers/iio/accel/adxl372_i2c.c
+F:	Documentation/devicetree/bindings/iio/accel/adxl372.txt
+
 AF9013 MEDIA DRIVER
 M:	Antti Palosaari <crope@iki.fi>
 L:	linux-media@vger.kernel.org
@@ -4388,13 +4397,6 @@ L:	linux-gpio@vger.kernel.org
 S:	Maintained
 F:	drivers/gpio/gpio-gpio-mm.c
 
-DIGI NEO AND CLASSIC PCI PRODUCTS
-M:	Lidza Louina <lidza.louina@gmail.com>
-M:	Mark Hounschell <markh@compro.net>
-L:	driverdev-devel@linuxdriverproject.org
-S:	Maintained
-F:	drivers/staging/dgnc/
-
 DIOLAN U2C-12 I2C DRIVER
 M:	Guenter Roeck <linux@roeck-us.net>
 L:	linux-i2c@vger.kernel.org
@@ -5675,10 +5677,9 @@ F:	Documentation/fault-injection/
 F:	lib/fault-inject.c
 
 FBTFT Framebuffer drivers
-M:	Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+S:	Orphan
 L:	dri-devel@lists.freedesktop.org
 L:	linux-fbdev@vger.kernel.org
-S:	Maintained
 F:	drivers/staging/fbtft/
 
 FC0011 TUNER DRIVER
@@ -7737,7 +7738,6 @@ IPX NETWORK LAYER
 L:	netdev@vger.kernel.org
 S:	Obsolete
 F:	include/uapi/linux/ipx.h
-F:	drivers/staging/ipx/
 
 IRQ DOMAINS (IRQ NUMBER MAPPING LIBRARY)
 M:	Marc Zyngier <marc.zyngier@arm.com>
@@ -8716,6 +8716,13 @@ L:	linux-scsi@vger.kernel.org
 S:	Maintained
 F:	drivers/scsi/sym53c8xx_2/
 
+LTC1660 DAC DRIVER
+M:	Marcus Folkesson <marcus.folkesson@gmail.com>
+L:	linux-iio@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/iio/dac/ltc1660.txt
+F:	drivers/iio/dac/ltc1660.c
+
 LTC4261 HARDWARE MONITOR DRIVER
 M:	Guenter Roeck <linux@roeck-us.net>
 L:	linux-hwmon@vger.kernel.org
@@ -9670,6 +9677,14 @@ L:	netdev@vger.kernel.org
 S:	Maintained
 F:	drivers/net/ethernet/microchip/lan743x_*
 
+MICROCHIP / ATMEL MCP3911 ADC DRIVER
+M:	Marcus Folkesson <marcus.folkesson@gmail.com>
+M:	Kent Gustavsson <kent@minoris.se>
+L:	linux-iio@vger.kernel.org
+S:	Supported
+F:	drivers/iio/adc/mcp3911.c
+F:	Documentation/devicetree/bindings/iio/adc/mcp3911.txt
+
 MICROCHIP USB251XB DRIVER
 M:	Richard Leitner <richard.leitner@skidata.com>
 L:	linux-usb@vger.kernel.org
@@ -10060,11 +10075,6 @@ NATSEMI ETHERNET DRIVER (DP8381x)
 S:	Orphan
 F:	drivers/net/ethernet/natsemi/natsemi.c
 
-NCP FILESYSTEM
-M:	Petr Vandrovec <petr@vandrovec.name>
-S:	Obsolete
-F:	drivers/staging/ncpfs/
-
 NCR 5380 SCSI DRIVERS
 M:	Finn Thain <fthain@telegraphics.com.au>
 M:	Michael Schmitz <schmitzmic@gmail.com>
@@ -13911,6 +13921,13 @@ L:	linux-i2c@vger.kernel.org
 S:	Maintained
 F:	drivers/i2c/busses/i2c-stm32*
 
+ST VL53L0X ToF RANGER(I2C) IIO DRIVER
+M:	Song Qiang <songqiang1304521@gmail.com>
+L:	linux-iio@vger.kernel.org
+S:	Maintained
+F:	drivers/iio/proximity/vl53l0x-i2c.c
+F:	Documentation/devicetree/bindings/iio/proximity/vl53l0x.txt
+
 STABLE BRANCH
 M:	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 L:	stable@vger.kernel.org
@@ -13930,11 +13947,6 @@ L:	linux-erofs@lists.ozlabs.org
 S:	Maintained
 F:	drivers/staging/erofs/
 
-STAGING - FLARION FT1000 DRIVERS
-M:	Marek Belisko <marek.belisko@gmail.com>
-S:	Odd Fixes
-F:	drivers/staging/ft1000/
-
 STAGING - INDUSTRIAL IO
 M:	Jonathan Cameron <jic23@kernel.org>
 L:	linux-iio@vger.kernel.org

drivers/iio/accel/Kconfig

@@ -60,6 +60,33 @@ config ADXL345_SPI
 	  will be called adxl345_spi and you will also get adxl345_core
 	  for the core module.
 
+config ADXL372
+	tristate
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+
+config ADXL372_SPI
+	tristate "Analog Devices ADXL372 3-Axis Accelerometer SPI Driver"
+	depends on SPI
+	select ADXL372
+	select REGMAP_SPI
+	help
+	  Say yes here to add support for the Analog Devices ADXL372 triaxial
+	  acceleration sensor.
+	  To compile this driver as a module, choose M here: the
+	  module will be called adxl372_spi.
+
+config ADXL372_I2C
+	tristate "Analog Devices ADXL372 3-Axis Accelerometer I2C Driver"
+	depends on I2C
+	select ADXL372
+	select REGMAP_I2C
+	help
+	  Say yes here to add support for the Analog Devices ADXL372 triaxial
+	  acceleration sensor.
+	  To compile this driver as a module, choose M here: the
+	  module will be called adxl372_i2c.
+
 config BMA180
 	tristate "Bosch BMA180/BMA250 3-Axis Accelerometer Driver"
 	depends on I2C

drivers/iio/accel/Makefile

@@ -9,6 +9,9 @@ obj-$(CONFIG_ADIS16209) += adis16209.o
 obj-$(CONFIG_ADXL345) += adxl345_core.o
 obj-$(CONFIG_ADXL345_I2C) += adxl345_i2c.o
 obj-$(CONFIG_ADXL345_SPI) += adxl345_spi.o
+obj-$(CONFIG_ADXL372) += adxl372.o
+obj-$(CONFIG_ADXL372_I2C) += adxl372_i2c.o
+obj-$(CONFIG_ADXL372_SPI) += adxl372_spi.o
 obj-$(CONFIG_BMA180) += bma180.o
 obj-$(CONFIG_BMA220) += bma220_spi.o
 obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o

drivers/iio/accel/adxl345_i2c.c

@@ -27,6 +27,9 @@ static int adxl345_i2c_probe(struct i2c_client *client,
 {
 	struct regmap *regmap;
 
+	if (!id)
+		return -ENODEV;
+
 	regmap = devm_regmap_init_i2c(client, &adxl345_i2c_regmap_config);
 	if (IS_ERR(regmap)) {
 		dev_err(&client->dev, "Error initializing i2c regmap: %ld\n",
@@ -35,7 +38,7 @@ static int adxl345_i2c_probe(struct i2c_client *client,
 	}
 
 	return adxl345_core_probe(&client->dev, regmap, id->driver_data,
-				  id ? id->name : NULL);
+				  id->name);
 }
 
 static int adxl345_i2c_remove(struct i2c_client *client)

drivers/iio/accel/adxl372.c

@@ -0,0 +1,975 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * ADXL372 3-Axis Digital Accelerometer core driver
+ *
+ * Copyright 2018 Analog Devices Inc.
+ */
+
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/events.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#include "adxl372.h"
+
+/* ADXL372 registers definition */
+#define ADXL372_DEVID			0x00
+#define ADXL372_DEVID_MST		0x01
+#define ADXL372_PARTID			0x02
+#define ADXL372_STATUS_1		0x04
+#define ADXL372_STATUS_2		0x05
+#define ADXL372_FIFO_ENTRIES_2		0x06
+#define ADXL372_FIFO_ENTRIES_1		0x07
+#define ADXL372_X_DATA_H		0x08
+#define ADXL372_X_DATA_L		0x09
+#define ADXL372_Y_DATA_H		0x0A
+#define ADXL372_Y_DATA_L		0x0B
+#define ADXL372_Z_DATA_H		0x0C
+#define ADXL372_Z_DATA_L		0x0D
+#define ADXL372_X_MAXPEAK_H		0x15
+#define ADXL372_X_MAXPEAK_L		0x16
+#define ADXL372_Y_MAXPEAK_H		0x17
+#define ADXL372_Y_MAXPEAK_L		0x18
+#define ADXL372_Z_MAXPEAK_H		0x19
+#define ADXL372_Z_MAXPEAK_L		0x1A
+#define ADXL372_OFFSET_X		0x20
+#define ADXL372_OFFSET_Y		0x21
+#define ADXL372_OFFSET_Z		0x22
+#define ADXL372_X_THRESH_ACT_H		0x23
+#define ADXL372_X_THRESH_ACT_L		0x24
+#define ADXL372_Y_THRESH_ACT_H		0x25
+#define ADXL372_Y_THRESH_ACT_L		0x26
+#define ADXL372_Z_THRESH_ACT_H		0x27
+#define ADXL372_Z_THRESH_ACT_L		0x28
+#define ADXL372_TIME_ACT		0x29
+#define ADXL372_X_THRESH_INACT_H	0x2A
+#define ADXL372_X_THRESH_INACT_L	0x2B
+#define ADXL372_Y_THRESH_INACT_H	0x2C
+#define ADXL372_Y_THRESH_INACT_L	0x2D
+#define ADXL372_Z_THRESH_INACT_H	0x2E
+#define ADXL372_Z_THRESH_INACT_L	0x2F
+#define ADXL372_TIME_INACT_H		0x30
+#define ADXL372_TIME_INACT_L		0x31
+#define ADXL372_X_THRESH_ACT2_H		0x32
+#define ADXL372_X_THRESH_ACT2_L		0x33
+#define ADXL372_Y_THRESH_ACT2_H		0x34
+#define ADXL372_Y_THRESH_ACT2_L		0x35
+#define ADXL372_Z_THRESH_ACT2_H		0x36
+#define ADXL372_Z_THRESH_ACT2_L		0x37
+#define ADXL372_HPF			0x38
+#define ADXL372_FIFO_SAMPLES		0x39
+#define ADXL372_FIFO_CTL		0x3A
+#define ADXL372_INT1_MAP		0x3B
+#define ADXL372_INT2_MAP		0x3C
+#define ADXL372_TIMING			0x3D
+#define ADXL372_MEASURE			0x3E
+#define ADXL372_POWER_CTL		0x3F
+#define ADXL372_SELF_TEST		0x40
+#define ADXL372_RESET			0x41
+#define ADXL372_FIFO_DATA		0x42
+
+#define ADXL372_DEVID_VAL		0xAD
+#define ADXL372_PARTID_VAL		0xFA
+#define ADXL372_RESET_CODE		0x52
+
+/* ADXL372_POWER_CTL */
+#define ADXL372_POWER_CTL_MODE_MSK		GENMASK_ULL(1, 0)
+#define ADXL372_POWER_CTL_MODE(x)		(((x) & 0x3) << 0)
+
+/* ADXL372_MEASURE */
+#define ADXL372_MEASURE_LINKLOOP_MSK		GENMASK_ULL(5, 4)
+#define ADXL372_MEASURE_LINKLOOP_MODE(x)	(((x) & 0x3) << 4)
+#define ADXL372_MEASURE_BANDWIDTH_MSK		GENMASK_ULL(2, 0)
+#define ADXL372_MEASURE_BANDWIDTH_MODE(x)	(((x) & 0x7) << 0)
+
+/* ADXL372_TIMING */
+#define ADXL372_TIMING_ODR_MSK			GENMASK_ULL(7, 5)
+#define ADXL372_TIMING_ODR_MODE(x)		(((x) & 0x7) << 5)
+
+/* ADXL372_FIFO_CTL */
+#define ADXL372_FIFO_CTL_FORMAT_MSK		GENMASK(5, 3)
+#define ADXL372_FIFO_CTL_FORMAT_MODE(x)		(((x) & 0x7) << 3)
+#define ADXL372_FIFO_CTL_MODE_MSK		GENMASK(2, 1)
+#define ADXL372_FIFO_CTL_MODE_MODE(x)		(((x) & 0x3) << 1)
+#define ADXL372_FIFO_CTL_SAMPLES_MSK		BIT(1)
+#define ADXL372_FIFO_CTL_SAMPLES_MODE(x)	(((x) > 0xFF) ? 1 : 0)
+
+/* ADXL372_STATUS_1 */
+#define ADXL372_STATUS_1_DATA_RDY(x)		(((x) >> 0) & 0x1)
+#define ADXL372_STATUS_1_FIFO_RDY(x)		(((x) >> 1) & 0x1)
+#define ADXL372_STATUS_1_FIFO_FULL(x)		(((x) >> 2) & 0x1)
+#define ADXL372_STATUS_1_FIFO_OVR(x)		(((x) >> 3) & 0x1)
+#define ADXL372_STATUS_1_USR_NVM_BUSY(x)	(((x) >> 5) & 0x1)
+#define ADXL372_STATUS_1_AWAKE(x)		(((x) >> 6) & 0x1)
+#define ADXL372_STATUS_1_ERR_USR_REGS(x)	(((x) >> 7) & 0x1)
+
+/* ADXL372_INT1_MAP */
+#define ADXL372_INT1_MAP_DATA_RDY_MSK		BIT(0)
+#define ADXL372_INT1_MAP_DATA_RDY_MODE(x)	(((x) & 0x1) << 0)
+#define ADXL372_INT1_MAP_FIFO_RDY_MSK		BIT(1)
+#define ADXL372_INT1_MAP_FIFO_RDY_MODE(x)	(((x) & 0x1) << 1)
+#define ADXL372_INT1_MAP_FIFO_FULL_MSK		BIT(2)
+#define ADXL372_INT1_MAP_FIFO_FULL_MODE(x)	(((x) & 0x1) << 2)
+#define ADXL372_INT1_MAP_FIFO_OVR_MSK		BIT(3)
+#define ADXL372_INT1_MAP_FIFO_OVR_MODE(x)	(((x) & 0x1) << 3)
+#define ADXL372_INT1_MAP_INACT_MSK		BIT(4)
+#define ADXL372_INT1_MAP_INACT_MODE(x)		(((x) & 0x1) << 4)
+#define ADXL372_INT1_MAP_ACT_MSK		BIT(5)
+#define ADXL372_INT1_MAP_ACT_MODE(x)		(((x) & 0x1) << 5)
+#define ADXL372_INT1_MAP_AWAKE_MSK		BIT(6)
+#define ADXL372_INT1_MAP_AWAKE_MODE(x)		(((x) & 0x1) << 6)
+#define ADXL372_INT1_MAP_LOW_MSK		BIT(7)
+#define ADXL372_INT1_MAP_LOW_MODE(x)		(((x) & 0x1) << 7)
+
+/* The ADXL372 includes a deep, 512 sample FIFO buffer */
+#define ADXL372_FIFO_SIZE			512
+
+/*
+ * At +/- 200g with 12-bit resolution, scale is computed as:
+ * (200 + 200) * 9.81 / (2^12 - 1) = 0.958241
+ */
+#define ADXL372_USCALE	958241
+
+enum adxl372_op_mode {
+	ADXL372_STANDBY,
+	ADXL372_WAKE_UP,
+	ADXL372_INSTANT_ON,
+	ADXL372_FULL_BW_MEASUREMENT,
+};
+
+enum adxl372_act_proc_mode {
+	ADXL372_DEFAULT,
+	ADXL372_LINKED,
+	ADXL372_LOOPED,
+};
+
+enum adxl372_th_activity {
+	ADXL372_ACTIVITY,
+	ADXL372_ACTIVITY2,
+	ADXL372_INACTIVITY,
+};
+
+enum adxl372_odr {
+	ADXL372_ODR_400HZ,
+	ADXL372_ODR_800HZ,
+	ADXL372_ODR_1600HZ,
+	ADXL372_ODR_3200HZ,
+	ADXL372_ODR_6400HZ,
+};
+
+enum adxl372_bandwidth {
+	ADXL372_BW_200HZ,
+	ADXL372_BW_400HZ,
+	ADXL372_BW_800HZ,
+	ADXL372_BW_1600HZ,
+	ADXL372_BW_3200HZ,
+};
+
+static const unsigned int adxl372_th_reg_high_addr[3] = {
+	[ADXL372_ACTIVITY] = ADXL372_X_THRESH_ACT_H,
+	[ADXL372_ACTIVITY2] = ADXL372_X_THRESH_ACT2_H,
+	[ADXL372_INACTIVITY] = ADXL372_X_THRESH_INACT_H,
+};
+
+enum adxl372_fifo_format {
+	ADXL372_XYZ_FIFO,
+	ADXL372_X_FIFO,
+	ADXL372_Y_FIFO,
+	ADXL372_XY_FIFO,
+	ADXL372_Z_FIFO,
+	ADXL372_XZ_FIFO,
+	ADXL372_YZ_FIFO,
+	ADXL372_XYZ_PEAK_FIFO,
+};
+
+enum adxl372_fifo_mode {
+	ADXL372_FIFO_BYPASSED,
+	ADXL372_FIFO_STREAMED,
+	ADXL372_FIFO_TRIGGERED,
+	ADXL372_FIFO_OLD_SAVED
+};
+
+static const int adxl372_samp_freq_tbl[5] = {
+	400, 800, 1600, 3200, 6400,
+};
+
+static const int adxl372_bw_freq_tbl[5] = {
+	200, 400, 800, 1600, 3200,
+};
+
+struct adxl372_axis_lookup {
+	unsigned int bits;
+	enum adxl372_fifo_format fifo_format;
+};
+
+static const struct adxl372_axis_lookup adxl372_axis_lookup_table[] = {
+	{ BIT(0), ADXL372_X_FIFO },
+	{ BIT(1), ADXL372_Y_FIFO },
+	{ BIT(2), ADXL372_Z_FIFO },
+	{ BIT(0) | BIT(1), ADXL372_XY_FIFO },
+	{ BIT(0) | BIT(2), ADXL372_XZ_FIFO },
+	{ BIT(1) | BIT(2), ADXL372_YZ_FIFO },
+	{ BIT(0) | BIT(1) | BIT(2), ADXL372_XYZ_FIFO },
+};
+
+#define ADXL372_ACCEL_CHANNEL(index, reg, axis) {			\
+	.type = IIO_ACCEL,						\
+	.address = reg,							\
+	.modified = 1,							\
+	.channel2 = IIO_MOD_##axis,					\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |		\
+				    BIT(IIO_CHAN_INFO_SAMP_FREQ) |	\
+		BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),	\
+	.scan_index = index,						\
+	.scan_type = {							\
+		.sign = 's',						\
+		.realbits = 12,						\
+		.storagebits = 16,					\
+		.shift = 4,						\
+	},								\
+}
+
+static const struct iio_chan_spec adxl372_channels[] = {
+	ADXL372_ACCEL_CHANNEL(0, ADXL372_X_DATA_H, X),
+	ADXL372_ACCEL_CHANNEL(1, ADXL372_Y_DATA_H, Y),
+	ADXL372_ACCEL_CHANNEL(2, ADXL372_Z_DATA_H, Z),
+};
+
+struct adxl372_state {
+	int				irq;
+	struct device			*dev;
+	struct regmap			*regmap;
+	struct iio_trigger		*dready_trig;
+	enum adxl372_fifo_mode		fifo_mode;
+	enum adxl372_fifo_format	fifo_format;
+	enum adxl372_op_mode		op_mode;
+	enum adxl372_act_proc_mode	act_proc_mode;
+	enum adxl372_odr		odr;
+	enum adxl372_bandwidth		bw;
+	u32				act_time_ms;
+	u32				inact_time_ms;
+	u8				fifo_set_size;
+	u8				int1_bitmask;
+	u8				int2_bitmask;
+	u16				watermark;
+	__be16				fifo_buf[ADXL372_FIFO_SIZE];
+};
+
+static const unsigned long adxl372_channel_masks[] = {
+	BIT(0), BIT(1), BIT(2),
+	BIT(0) | BIT(1),
+	BIT(0) | BIT(2),
+	BIT(1) | BIT(2),
+	BIT(0) | BIT(1) | BIT(2),
+	0
+};
+
+static int adxl372_read_axis(struct adxl372_state *st, u8 addr)
+{
+	__be16 regval;
+	int ret;
+
+	ret = regmap_bulk_read(st->regmap, addr, &regval, sizeof(regval));
+	if (ret < 0)
+		return ret;
+
+	return be16_to_cpu(regval);
+}
+
+static int adxl372_set_op_mode(struct adxl372_state *st,
+			       enum adxl372_op_mode op_mode)
+{
+	int ret;
+
+	ret = regmap_update_bits(st->regmap, ADXL372_POWER_CTL,
+				 ADXL372_POWER_CTL_MODE_MSK,
+				 ADXL372_POWER_CTL_MODE(op_mode));
+	if (ret < 0)
+		return ret;
+
+	st->op_mode = op_mode;
+
+	return ret;
+}
+
+static int adxl372_set_odr(struct adxl372_state *st,
+			   enum adxl372_odr odr)
+{
+	int ret;
+
+	ret = regmap_update_bits(st->regmap, ADXL372_TIMING,
+				 ADXL372_TIMING_ODR_MSK,
+				 ADXL372_TIMING_ODR_MODE(odr));
+	if (ret < 0)
+		return ret;
+
+	st->odr = odr;
+
+	return ret;
+}
+
+static int adxl372_find_closest_match(const int *array,
+				      unsigned int size, int val)
+{
+	int i;
+
+	for (i = 0; i < size; i++) {
+		if (val <= array[i])
+			return i;
+	}
+
+	return size - 1;
+}
+
+static int adxl372_set_bandwidth(struct adxl372_state *st,
+				 enum adxl372_bandwidth bw)
+{
+	int ret;
+
+	ret = regmap_update_bits(st->regmap, ADXL372_MEASURE,
+				 ADXL372_MEASURE_BANDWIDTH_MSK,
+				 ADXL372_MEASURE_BANDWIDTH_MODE(bw));
+	if (ret < 0)
+		return ret;
+
+	st->bw = bw;
+
+	return ret;
+}
+
+static int adxl372_set_act_proc_mode(struct adxl372_state *st,
+				     enum adxl372_act_proc_mode mode)
+{
+	int ret;
+
+	ret = regmap_update_bits(st->regmap,
+				 ADXL372_MEASURE,
+				 ADXL372_MEASURE_LINKLOOP_MSK,
+				 ADXL372_MEASURE_LINKLOOP_MODE(mode));
+	if (ret < 0)
+		return ret;
+
+	st->act_proc_mode = mode;
+
+	return ret;
+}
+
+static int adxl372_set_activity_threshold(struct adxl372_state *st,
+					  enum adxl372_th_activity act,
+					  bool ref_en, bool enable,
+					  unsigned int threshold)
+{
+	unsigned char buf[6];
+	unsigned char th_reg_high_val, th_reg_low_val, th_reg_high_addr;
+
+	/* scale factor is 100 mg/code */
+	th_reg_high_val = (threshold / 100) >> 3;
+	th_reg_low_val = ((threshold / 100) << 5) | (ref_en << 1) | enable;
+	th_reg_high_addr = adxl372_th_reg_high_addr[act];
+
+	buf[0] = th_reg_high_val;
+	buf[1] = th_reg_low_val;
+	buf[2] = th_reg_high_val;
+	buf[3] = th_reg_low_val;
+	buf[4] = th_reg_high_val;
+	buf[5] = th_reg_low_val;
+
+	return regmap_bulk_write(st->regmap, th_reg_high_addr,
+				 buf, ARRAY_SIZE(buf));
+}
+
+static int adxl372_set_activity_time_ms(struct adxl372_state *st,
+					unsigned int act_time_ms)
+{
+	unsigned int reg_val, scale_factor;
+	int ret;
+
+	/*
+	 * 3.3 ms per code is the scale factor of the TIME_ACT register for
+	 * ODR = 6400 Hz. It is 6.6 ms per code for ODR = 3200 Hz and below.
+	 */
+	if (st->odr == ADXL372_ODR_6400HZ)
+		scale_factor = 3300;
+	else
+		scale_factor = 6600;
+
+	reg_val = DIV_ROUND_CLOSEST(act_time_ms * 1000, scale_factor);
+
+	/* TIME_ACT register is 8 bits wide */
+	if (reg_val > 0xFF)
+		reg_val = 0xFF;
+
+	ret = regmap_write(st->regmap, ADXL372_TIME_ACT, reg_val);
+	if (ret < 0)
+		return ret;
+
+	st->act_time_ms = act_time_ms;
+
+	return ret;
+}
+
+static int adxl372_set_inactivity_time_ms(struct adxl372_state *st,
+					  unsigned int inact_time_ms)
+{
+	unsigned int reg_val_h, reg_val_l, res, scale_factor;
+	int ret;
+
+	/*
+	 * 13 ms per code is the scale factor of the TIME_INACT register for
+	 * ODR = 6400 Hz. It is 26 ms per code for ODR = 3200 Hz and below.
+	 */
+	if (st->odr == ADXL372_ODR_6400HZ)
+		scale_factor = 13;
+	else
+		scale_factor = 26;
+
+	res = DIV_ROUND_CLOSEST(inact_time_ms, scale_factor);
+	reg_val_h = (res >> 8) & 0xFF;
+	reg_val_l = res & 0xFF;
+
+	ret = regmap_write(st->regmap, ADXL372_TIME_INACT_H, reg_val_h);
+	if (ret < 0)
+		return ret;
+
+	ret = regmap_write(st->regmap, ADXL372_TIME_INACT_L, reg_val_l);
+	if (ret < 0)
+		return ret;
+
+	st->inact_time_ms = inact_time_ms;
+
+	return ret;
+}
+
+static int adxl372_set_interrupts(struct adxl372_state *st,
+				  unsigned char int1_bitmask,
+				  unsigned char int2_bitmask)
+{
+	int ret;
+
+	ret = regmap_write(st->regmap, ADXL372_INT1_MAP, int1_bitmask);
+	if (ret < 0)
+		return ret;
+
+	return regmap_write(st->regmap, ADXL372_INT2_MAP, int2_bitmask);
+}
+
+static int adxl372_configure_fifo(struct adxl372_state *st)
+{
+	unsigned int fifo_samples, fifo_ctl;
+	int ret;
+
+	/* FIFO must be configured while in standby mode */
+	ret = adxl372_set_op_mode(st, ADXL372_STANDBY);
+	if (ret < 0)
+		return ret;
+
+	fifo_samples = st->watermark & 0xFF;
+	fifo_ctl = ADXL372_FIFO_CTL_FORMAT_MODE(st->fifo_format) |
+		   ADXL372_FIFO_CTL_MODE_MODE(st->fifo_mode) |
+		   ADXL372_FIFO_CTL_SAMPLES_MODE(st->watermark);
+
+	ret = regmap_write(st->regmap, ADXL372_FIFO_SAMPLES, fifo_samples);
+	if (ret < 0)
+		return ret;
+
+	ret = regmap_write(st->regmap, ADXL372_FIFO_CTL, fifo_ctl);
+	if (ret < 0)
+		return ret;
+
+	return adxl372_set_op_mode(st, ADXL372_FULL_BW_MEASUREMENT);
+}
+
+static int adxl372_get_status(struct adxl372_state *st,
+			      u8 *status1, u8 *status2,
+			      u16 *fifo_entries)
+{
+	__be32 buf;
+	u32 val;
+	int ret;
+
+	/* STATUS1, STATUS2, FIFO_ENTRIES2 and FIFO_ENTRIES are adjacent regs */
+	ret = regmap_bulk_read(st->regmap, ADXL372_STATUS_1,
+			       &buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	val = be32_to_cpu(buf);
+
+	*status1 = (val >> 24) & 0x0F;
+	*status2 = (val >> 16) & 0x0F;
+	/*
+	 * FIFO_ENTRIES contains the least significant byte, and FIFO_ENTRIES2
+	 * contains the two most significant bits
+	 */
+	*fifo_entries = val & 0x3FF;
+
+	return ret;
+}
+
+static irqreturn_t adxl372_trigger_handler(int irq, void  *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct adxl372_state *st = iio_priv(indio_dev);
+	u8 status1, status2;
+	u16 fifo_entries;
+	int i, ret;
+
+	ret = adxl372_get_status(st, &status1, &status2, &fifo_entries);
+	if (ret < 0)
+		goto err;
+
+	if (st->fifo_mode != ADXL372_FIFO_BYPASSED &&
+	    ADXL372_STATUS_1_FIFO_FULL(status1)) {
+		/*
+		 * When reading data from multiple axes from the FIFO,
+		 * to ensure that data is not overwritten and stored out
+		 * of order at least one sample set must be left in the
+		 * FIFO after every read.
+		 */
+		fifo_entries -= st->fifo_set_size;
+
+		/* Read data from the FIFO */
+		ret = regmap_noinc_read(st->regmap, ADXL372_FIFO_DATA,
+					st->fifo_buf,
+					fifo_entries * sizeof(u16));
+		if (ret < 0)
+			goto err;
+
+		/* Each sample is 2 bytes */
+		for (i = 0; i < fifo_entries * sizeof(u16);
+		     i += st->fifo_set_size * sizeof(u16))
+			iio_push_to_buffers(indio_dev, &st->fifo_buf[i]);
+	}
+err:
+	iio_trigger_notify_done(indio_dev->trig);
+	return IRQ_HANDLED;
+}
+
+static int adxl372_setup(struct adxl372_state *st)
+{
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(st->regmap, ADXL372_DEVID, &regval);
+	if (ret < 0)
+		return ret;
+
+	if (regval != ADXL372_DEVID_VAL) {
+		dev_err(st->dev, "Invalid chip id %x\n", regval);
+		return -ENODEV;
+	}
+
+	ret = adxl372_set_op_mode(st, ADXL372_STANDBY);
+	if (ret < 0)
+		return ret;
+
+	/* Set threshold for activity detection to 1g */
+	ret = adxl372_set_activity_threshold(st, ADXL372_ACTIVITY,
+					     true, true, 1000);
+	if (ret < 0)
+		return ret;
+
+	/* Set threshold for inactivity detection to 100mg */
+	ret = adxl372_set_activity_threshold(st, ADXL372_INACTIVITY,
+					     true, true, 100);
+	if (ret < 0)
+		return ret;
+
+	/* Set activity processing in Looped mode */
+	ret = adxl372_set_act_proc_mode(st, ADXL372_LOOPED);
+	if (ret < 0)
+		return ret;
+
+	ret = adxl372_set_odr(st, ADXL372_ODR_6400HZ);
+	if (ret < 0)
+		return ret;
+
+	ret = adxl372_set_bandwidth(st, ADXL372_BW_3200HZ);
+	if (ret < 0)
+		return ret;
+
+	/* Set activity timer to 1ms */
+	ret = adxl372_set_activity_time_ms(st, 1);
+	if (ret < 0)
+		return ret;
+
+	/* Set inactivity timer to 10s */
+	ret = adxl372_set_inactivity_time_ms(st, 10000);
+	if (ret < 0)
+		return ret;
+
+	/* Set the mode of operation to full bandwidth measurement mode */
+	return adxl372_set_op_mode(st, ADXL372_FULL_BW_MEASUREMENT);
+}
+
+static int adxl372_reg_access(struct iio_dev *indio_dev,
+			      unsigned int reg,
+			      unsigned int writeval,
+			      unsigned int *readval)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	if (readval)
+		return regmap_read(st->regmap, reg, readval);
+	else
+		return regmap_write(st->regmap, reg, writeval);
+}
+
+static int adxl372_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int *val, int *val2, long info)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+	int ret;
+
+	switch (info) {
+	case IIO_CHAN_INFO_RAW:
+		ret = iio_device_claim_direct_mode(indio_dev);
+		if (ret)
+			return ret;
+
+		ret = adxl372_read_axis(st, chan->address);
+		iio_device_release_direct_mode(indio_dev);
+		if (ret < 0)
+			return ret;
+
+		*val = sign_extend32(ret >> chan->scan_type.shift,
+				     chan->scan_type.realbits - 1);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = ADXL372_USCALE;
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		*val = adxl372_samp_freq_tbl[st->odr];
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+		*val = adxl372_bw_freq_tbl[st->bw];
+		return IIO_VAL_INT;
+	}
+
+	return -EINVAL;
+}
+
+static int adxl372_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long info)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+	int odr_index, bw_index, ret;
+
+	switch (info) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		odr_index = adxl372_find_closest_match(adxl372_samp_freq_tbl,
+					ARRAY_SIZE(adxl372_samp_freq_tbl),
+					val);
+		ret = adxl372_set_odr(st, odr_index);
+		if (ret < 0)
+			return ret;
+		/*
+		 * The timer period depends on the ODR selected.
+		 * At 3200 Hz and below, it is 6.6 ms; at 6400 Hz, it is 3.3 ms
+		 */
+		ret = adxl372_set_activity_time_ms(st, st->act_time_ms);
+		if (ret < 0)
+			return ret;
+		/*
+		 * The timer period depends on the ODR selected.
+		 * At 3200 Hz and below, it is 26 ms; at 6400 Hz, it is 13 ms
+		 */
+		ret = adxl372_set_inactivity_time_ms(st, st->inact_time_ms);
+		if (ret < 0)
+			return ret;
+		/*
+		 * The maximum bandwidth is constrained to at most half of
+		 * the ODR to ensure that the Nyquist criteria is not violated
+		 */
+		if (st->bw > odr_index)
+			ret = adxl372_set_bandwidth(st, odr_index);
+
+		return ret;
+	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+		bw_index = adxl372_find_closest_match(adxl372_bw_freq_tbl,
+					ARRAY_SIZE(adxl372_bw_freq_tbl),
+					val);
+		return adxl372_set_bandwidth(st, bw_index);
+	default:
+		return -EINVAL;
+	}
+}
+
+static ssize_t adxl372_show_filter_freq_avail(struct device *dev,
+					      struct device_attribute *attr,
+					      char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct adxl372_state *st = iio_priv(indio_dev);
+	int i;
+	size_t len = 0;
+
+	for (i = 0; i <= st->odr; i++)
+		len += scnprintf(buf + len, PAGE_SIZE - len,
+				 "%d ", adxl372_bw_freq_tbl[i]);
+
+	buf[len - 1] = '\n';
+
+	return len;
+}
+
+static ssize_t adxl372_get_fifo_enabled(struct device *dev,
+					  struct device_attribute *attr,
+					  char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	return sprintf(buf, "%d\n", st->fifo_mode);
+}
+
+static ssize_t adxl372_get_fifo_watermark(struct device *dev,
+					  struct device_attribute *attr,
+					  char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	return sprintf(buf, "%d\n", st->watermark);
+}
+
+static IIO_CONST_ATTR(hwfifo_watermark_min, "1");
+static IIO_CONST_ATTR(hwfifo_watermark_max,
+		      __stringify(ADXL372_FIFO_SIZE));
+static IIO_DEVICE_ATTR(hwfifo_watermark, 0444,
+		       adxl372_get_fifo_watermark, NULL, 0);
+static IIO_DEVICE_ATTR(hwfifo_enabled, 0444,
+		       adxl372_get_fifo_enabled, NULL, 0);
+
+static const struct attribute *adxl372_fifo_attributes[] = {
+	&iio_const_attr_hwfifo_watermark_min.dev_attr.attr,
+	&iio_const_attr_hwfifo_watermark_max.dev_attr.attr,
+	&iio_dev_attr_hwfifo_watermark.dev_attr.attr,
+	&iio_dev_attr_hwfifo_enabled.dev_attr.attr,
+	NULL,
+};
+
+static int adxl372_set_watermark(struct iio_dev *indio_dev, unsigned int val)
+{
+	struct adxl372_state *st  = iio_priv(indio_dev);
+
+	if (val > ADXL372_FIFO_SIZE)
+		val = ADXL372_FIFO_SIZE;
+
+	st->watermark = val;
+
+	return 0;
+}
+
+static int adxl372_buffer_postenable(struct iio_dev *indio_dev)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+	unsigned int mask;
+	int i, ret;
+
+	ret = adxl372_set_interrupts(st, ADXL372_INT1_MAP_FIFO_FULL_MSK, 0);
+	if (ret < 0)
+		return ret;
+
+	mask = *indio_dev->active_scan_mask;
+
+	for (i = 0; i < ARRAY_SIZE(adxl372_axis_lookup_table); i++) {
+		if (mask == adxl372_axis_lookup_table[i].bits)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(adxl372_axis_lookup_table))
+		return -EINVAL;
+
+	st->fifo_format = adxl372_axis_lookup_table[i].fifo_format;
+	st->fifo_set_size = bitmap_weight(indio_dev->active_scan_mask,
+					  indio_dev->masklength);
+	/*
+	 * The 512 FIFO samples can be allotted in several ways, such as:
+	 * 170 sample sets of concurrent 3-axis data
+	 * 256 sample sets of concurrent 2-axis data (user selectable)
+	 * 512 sample sets of single-axis data
+	 */
+	if ((st->watermark * st->fifo_set_size) > ADXL372_FIFO_SIZE)
+		st->watermark = (ADXL372_FIFO_SIZE  / st->fifo_set_size);
+
+	st->fifo_mode = ADXL372_FIFO_STREAMED;
+
+	ret = adxl372_configure_fifo(st);
+	if (ret < 0) {
+		st->fifo_mode = ADXL372_FIFO_BYPASSED;
+		adxl372_set_interrupts(st, 0, 0);
+		return ret;
+	}
+
+	return iio_triggered_buffer_postenable(indio_dev);
+}
+
+static int adxl372_buffer_predisable(struct iio_dev *indio_dev)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+	int ret;
+
+	ret = iio_triggered_buffer_predisable(indio_dev);
+	if (ret < 0)
+		return ret;
+
+	adxl372_set_interrupts(st, 0, 0);
+	st->fifo_mode = ADXL372_FIFO_BYPASSED;
+	adxl372_configure_fifo(st);
+
+	return 0;
+}
+
+static const struct iio_buffer_setup_ops adxl372_buffer_ops = {
+	.postenable = adxl372_buffer_postenable,
+	.predisable = adxl372_buffer_predisable,
+};
+
+static int adxl372_dready_trig_set_state(struct iio_trigger *trig,
+					 bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct adxl372_state *st = iio_priv(indio_dev);
+	unsigned long int mask = 0;
+
+	if (state)
+		mask = ADXL372_INT1_MAP_FIFO_FULL_MSK;
+
+	return adxl372_set_interrupts(st, mask, 0);
+}
+
+static int adxl372_validate_trigger(struct iio_dev *indio_dev,
+				    struct iio_trigger *trig)
+{
+	struct adxl372_state *st = iio_priv(indio_dev);
+
+	if (st->dready_trig != trig)
+		return -EINVAL;
+
+	return 0;
+}
+
+static const struct iio_trigger_ops adxl372_trigger_ops = {
+	.validate_device = &iio_trigger_validate_own_device,
+	.set_trigger_state = adxl372_dready_trig_set_state,
+};
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("400 800 1600 3200 6400");
+static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
+		       0444, adxl372_show_filter_freq_avail, NULL, 0);
+
+static struct attribute *adxl372_attributes[] = {
+	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	&iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group adxl372_attrs_group = {
+	.attrs = adxl372_attributes,
+};
+
+static const struct iio_info adxl372_info = {
+	.validate_trigger = &adxl372_validate_trigger,
+	.attrs = &adxl372_attrs_group,
+	.read_raw = adxl372_read_raw,
+	.write_raw = adxl372_write_raw,
+	.debugfs_reg_access = &adxl372_reg_access,
+	.hwfifo_set_watermark = adxl372_set_watermark,
+};
+
+bool adxl372_readable_noinc_reg(struct device *dev, unsigned int reg)
+{
+	return (reg == ADXL372_FIFO_DATA);
+}
+EXPORT_SYMBOL_GPL(adxl372_readable_noinc_reg);
+
+int adxl372_probe(struct device *dev, struct regmap *regmap,
+		  int irq, const char *name)
+{
+	struct iio_dev *indio_dev;
+	struct adxl372_state *st;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	st = iio_priv(indio_dev);
+	dev_set_drvdata(dev, indio_dev);
+
+	st->dev = dev;
+	st->regmap = regmap;
+	st->irq = irq;
+
+	indio_dev->channels = adxl372_channels;
+	indio_dev->num_channels = ARRAY_SIZE(adxl372_channels);
+	indio_dev->available_scan_masks = adxl372_channel_masks;
+	indio_dev->dev.parent = dev;
+	indio_dev->name = name;
+	indio_dev->info = &adxl372_info;
+	indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
+
+	ret = adxl372_setup(st);
+	if (ret < 0) {
+		dev_err(dev, "ADXL372 setup failed\n");
+		return ret;
+	}
+
+	ret = devm_iio_triggered_buffer_setup(dev,
+					      indio_dev, NULL,
+					      adxl372_trigger_handler,
+					      &adxl372_buffer_ops);
+	if (ret < 0)
+		return ret;
+
+	iio_buffer_set_attrs(indio_dev->buffer, adxl372_fifo_attributes);
+
+	if (st->irq) {
+		st->dready_trig = devm_iio_trigger_alloc(dev,
+							 "%s-dev%d",
+							 indio_dev->name,
+							 indio_dev->id);
+		if (st->dready_trig == NULL)
+			return -ENOMEM;
+
+		st->dready_trig->ops = &adxl372_trigger_ops;
+		st->dready_trig->dev.parent = dev;
+		iio_trigger_set_drvdata(st->dready_trig, indio_dev);
+		ret = devm_iio_trigger_register(dev, st->dready_trig);
+		if (ret < 0)
+			return ret;
+
+		indio_dev->trig = iio_trigger_get(st->dready_trig);
+
+		ret = devm_request_threaded_irq(dev, st->irq,
+					iio_trigger_generic_data_rdy_poll,
+					NULL,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					indio_dev->name, st->dready_trig);
+		if (ret < 0)
+			return ret;
+	}
+
+	return devm_iio_device_register(dev, indio_dev);
+}
+EXPORT_SYMBOL_GPL(adxl372_probe);
+
+MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
+MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer driver");
+MODULE_LICENSE("GPL");

drivers/iio/accel/adxl372.h

@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * ADXL372 3-Axis Digital Accelerometer
+ *
+ * Copyright 2018 Analog Devices Inc.
+ */
+
+#ifndef _ADXL372_H_
+#define _ADXL372_H_
+
+#define ADXL372_REVID	0x03
+
+int adxl372_probe(struct device *dev, struct regmap *regmap,
+		  int irq, const char *name);
+bool adxl372_readable_noinc_reg(struct device *dev, unsigned int reg);
+
+#endif /* _ADXL372_H_ */

drivers/iio/accel/adxl372_i2c.c

@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * ADXL372 3-Axis Digital Accelerometer I2C driver
+ *
+ * Copyright 2018 Analog Devices Inc.
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "adxl372.h"
+
+static const struct regmap_config adxl372_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.readable_noinc_reg = adxl372_readable_noinc_reg,
+};
+
+static int adxl372_i2c_probe(struct i2c_client *client,
+			     const struct i2c_device_id *id)
+{
+	struct regmap *regmap;
+	unsigned int regval;
+	int ret;
+
+	regmap = devm_regmap_init_i2c(client, &adxl372_regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	ret = regmap_read(regmap, ADXL372_REVID, &regval);
+	if (ret < 0)
+		return ret;
+
+	/* Starting with the 3rd revision an I2C chip bug was fixed */
+	if (regval < 3)
+		dev_warn(&client->dev,
+		"I2C might not work properly with other devices on the bus");
+
+	return adxl372_probe(&client->dev, regmap, client->irq, id->name);
+}
+
+static const struct i2c_device_id adxl372_i2c_id[] = {
+	{ "adxl372", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, adxl372_i2c_id);
+
+static struct i2c_driver adxl372_i2c_driver = {
+	.driver = {
+		.name = "adxl372_i2c",
+	},
+	.probe = adxl372_i2c_probe,
+	.id_table = adxl372_i2c_id,
+};
+
+module_i2c_driver(adxl372_i2c_driver);
+
+MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
+MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer I2C driver");
+MODULE_LICENSE("GPL");

drivers/iio/accel/adxl372_spi.c

@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * ADXL372 3-Axis Digital Accelerometer SPI driver
+ *
+ * Copyright 2018 Analog Devices Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include "adxl372.h"
+
+static const struct regmap_config adxl372_spi_regmap_config = {
+	.reg_bits = 7,
+	.pad_bits = 1,
+	.val_bits = 8,
+	.read_flag_mask = BIT(0),
+	.readable_noinc_reg = adxl372_readable_noinc_reg,
+};
+
+static int adxl372_spi_probe(struct spi_device *spi)
+{
+	const struct spi_device_id *id = spi_get_device_id(spi);
+	struct regmap *regmap;
+
+	regmap = devm_regmap_init_spi(spi, &adxl372_spi_regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return adxl372_probe(&spi->dev, regmap, spi->irq, id->name);
+}
+
+static const struct spi_device_id adxl372_spi_id[] = {
+	{ "adxl372", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(spi, adxl372_spi_id);
+
+static struct spi_driver adxl372_spi_driver = {
+	.driver = {
+		.name = "adxl372_spi",
+	},
+	.probe = adxl372_spi_probe,
+	.id_table = adxl372_spi_id,
+};
+
+module_spi_driver(adxl372_spi_driver);
+
+MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
+MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer SPI driver");
+MODULE_LICENSE("GPL");

drivers/iio/adc/Kconfig

@@ -501,6 +501,16 @@ config MCP3422
 	  This driver can also be built as a module. If so, the module will be
 	  called mcp3422.
 
+config MCP3911
+	tristate "Microchip Technology MCP3911 driver"
+	depends on SPI
+	help
+	  Say yes here to build support for Microchip Technology's MCP3911
+	  analog to digital converter.
+
+	  This driver can also be built as a module. If so, the module will be
+	  called mcp3911.
+
 config MEDIATEK_MT6577_AUXADC
         tristate "MediaTek AUXADC driver"
         depends on ARCH_MEDIATEK || COMPILE_TEST
@@ -596,6 +606,26 @@ config QCOM_SPMI_VADC
 	  To compile this driver as a module, choose M here: the module will
 	  be called qcom-spmi-vadc.
 
+config QCOM_SPMI_ADC5
+	tristate "Qualcomm Technologies Inc. SPMI PMIC5 ADC"
+	depends on SPMI
+	select REGMAP_SPMI
+	select QCOM_VADC_COMMON
+	help
+	  This is the IIO Voltage PMIC5 ADC driver for Qualcomm Technologies Inc.
+
+	  The driver supports multiple channels read. The ADC is a 16-bit
+	  sigma-delta ADC. The hardware supports calibrated results for
+	  conversion requests and clients include reading voltage phone
+	  power, on board system thermistors connected to the PMIC ADC,
+	  PMIC die temperature, charger temperature, battery current, USB voltage
+	  input, voltage signals connected to supported PMIC GPIO inputs. The
+	  hardware supports internal pull-up for thermistors and can choose between
+	  a 100k, 30k and 400k pull up using the ADC channels.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called qcom-spmi-adc5.
+
 config RCAR_GYRO_ADC
 	tristate "Renesas R-Car GyroADC driver"
 	depends on ARCH_RCAR_GEN2 || COMPILE_TEST

drivers/iio/adc/Makefile

@@ -47,12 +47,14 @@ obj-$(CONFIG_MAX1363) += max1363.o
 obj-$(CONFIG_MAX9611) += max9611.o
 obj-$(CONFIG_MCP320X) += mcp320x.o
 obj-$(CONFIG_MCP3422) += mcp3422.o
+obj-$(CONFIG_MCP3911) += mcp3911.o
 obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o
 obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o
 obj-$(CONFIG_MESON_SARADC) += meson_saradc.o
 obj-$(CONFIG_MXS_LRADC_ADC) += mxs-lradc-adc.o
 obj-$(CONFIG_NAU7802) += nau7802.o
 obj-$(CONFIG_PALMAS_GPADC) += palmas_gpadc.o
+obj-$(CONFIG_QCOM_SPMI_ADC5) += qcom-spmi-adc5.o
 obj-$(CONFIG_QCOM_SPMI_IADC) += qcom-spmi-iadc.o
 obj-$(CONFIG_QCOM_VADC_COMMON) += qcom-vadc-common.o
 obj-$(CONFIG_QCOM_SPMI_VADC) += qcom-spmi-vadc.o

drivers/iio/adc/ad7298.c

@@ -385,6 +385,6 @@ static struct spi_driver ad7298_driver = {
 };
 module_spi_driver(ad7298_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("Analog Devices AD7298 ADC");
 MODULE_LICENSE("GPL v2");

drivers/iio/adc/ad7476.c

@@ -328,6 +328,6 @@ static struct spi_driver ad7476_driver = {
 };
 module_spi_driver(ad7476_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("Analog Devices AD7476 and similar 1-channel ADCs");
 MODULE_LICENSE("GPL v2");

drivers/iio/adc/ad7793.c

@@ -822,6 +822,6 @@ static struct spi_driver ad7793_driver = {
 };
 module_spi_driver(ad7793_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("Analog Devices AD7793 and similar ADCs");
 MODULE_LICENSE("GPL v2");

drivers/iio/adc/ad7887.c

@@ -362,6 +362,6 @@ static struct spi_driver ad7887_driver = {
 };
 module_spi_driver(ad7887_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("Analog Devices AD7887 ADC");
 MODULE_LICENSE("GPL v2");

drivers/iio/adc/ad7923.c

@@ -363,7 +363,7 @@ static struct spi_driver ad7923_driver = {
 };
 module_spi_driver(ad7923_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_AUTHOR("Patrick Vasseur <patrick.vasseur@c-s.fr>");
 MODULE_DESCRIPTION("Analog Devices AD7904/AD7914/AD7923/AD7924 ADC");
 MODULE_LICENSE("GPL v2");

drivers/iio/adc/ad799x.c

@@ -892,6 +892,6 @@ static struct i2c_driver ad799x_driver = {
 };
 module_i2c_driver(ad799x_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("Analog Devices AD799x ADC");
 MODULE_LICENSE("GPL v2");

drivers/iio/adc/at91_adc.c

@@ -248,12 +248,14 @@ static irqreturn_t at91_adc_trigger_handler(int irq, void *p)
 	struct iio_poll_func *pf = p;
 	struct iio_dev *idev = pf->indio_dev;
 	struct at91_adc_state *st = iio_priv(idev);
+	struct iio_chan_spec const *chan;
 	int i, j = 0;
 
 	for (i = 0; i < idev->masklength; i++) {
 		if (!test_bit(i, idev->active_scan_mask))
 			continue;
-		st->buffer[j] = at91_adc_readl(st, AT91_ADC_CHAN(st, i));
+		chan = idev->channels + i;
+		st->buffer[j] = at91_adc_readl(st, AT91_ADC_CHAN(st, chan->channel));
 		j++;
 	}
 
@@ -279,6 +281,8 @@ static void handle_adc_eoc_trigger(int irq, struct iio_dev *idev)
 		iio_trigger_poll(idev->trig);
 	} else {
 		st->last_value = at91_adc_readl(st, AT91_ADC_CHAN(st, st->chnb));
+		/* Needed to ACK the DRDY interruption */
+		at91_adc_readl(st, AT91_ADC_LCDR);
 		st->done = true;
 		wake_up_interruptible(&st->wq_data_avail);
 	}

drivers/iio/adc/envelope-detector.c

@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for an envelope detector using a DAC and a comparator
  *
  * Copyright (C) 2016 Axentia Technologies AB
  *
  * Author: Peter Rosin <peda@axentia.se>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 /*

drivers/iio/adc/fsl-imx25-gcq.c

@@ -209,12 +209,14 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev,
 		ret = of_property_read_u32(child, "reg", &reg);
 		if (ret) {
 			dev_err(dev, "Failed to get reg property\n");
+			of_node_put(child);
 			return ret;
 		}
 
 		if (reg >= MX25_NUM_CFGS) {
 			dev_err(dev,
 				"reg value is greater than the number of available configuration registers\n");
+			of_node_put(child);
 			return -EINVAL;
 		}
 
@@ -228,6 +230,7 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev,
 			if (IS_ERR(priv->vref[refp])) {
 				dev_err(dev, "Error, trying to use external voltage reference without a vref-%s regulator.",
 					mx25_gcq_refp_names[refp]);
+				of_node_put(child);
 				return PTR_ERR(priv->vref[refp]);
 			}
 			priv->channel_vref_mv[reg] =
@@ -240,6 +243,7 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev,
 			break;
 		default:
 			dev_err(dev, "Invalid positive reference %d\n", refp);
+			of_node_put(child);
 			return -EINVAL;
 		}
 
@@ -254,10 +258,12 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev,
 
 		if ((refp & MX25_ADCQ_CFG_REFP_MASK) != refp) {
 			dev_err(dev, "Invalid fsl,adc-refp property value\n");
+			of_node_put(child);
 			return -EINVAL;
 		}
 		if ((refn & MX25_ADCQ_CFG_REFN_MASK) != refn) {
 			dev_err(dev, "Invalid fsl,adc-refn property value\n");
+			of_node_put(child);
 			return -EINVAL;
 		}
 

drivers/iio/adc/max9611.c

@@ -289,7 +289,7 @@ static int max9611_read_csa_voltage(struct max9611_dev *max9611,
 			return ret;
 
 		if (*adc_raw > 0) {
-			*csa_gain = gain_selectors[i];
+			*csa_gain = (enum max9611_csa_gain)gain_selectors[i];
 			return 0;
 		}
 	}

drivers/iio/adc/mcp3911.c

@@ -0,0 +1,363 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Microchip MCP3911, Two-channel Analog Front End
+ *
+ * Copyright (C) 2018 Marcus Folkesson <marcus.folkesson@gmail.com>
+ * Copyright (C) 2018 Kent Gustavsson <kent@minoris.se>
+ */
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+
+#define MCP3911_REG_CHANNEL0		0x00
+#define MCP3911_REG_CHANNEL1		0x03
+#define MCP3911_REG_MOD			0x06
+#define MCP3911_REG_PHASE		0x07
+#define MCP3911_REG_GAIN		0x09
+
+#define MCP3911_REG_STATUSCOM		0x0a
+#define MCP3911_STATUSCOM_CH1_24WIDTH	BIT(4)
+#define MCP3911_STATUSCOM_CH0_24WIDTH	BIT(3)
+#define MCP3911_STATUSCOM_EN_OFFCAL	BIT(2)
+#define MCP3911_STATUSCOM_EN_GAINCAL	BIT(1)
+
+#define MCP3911_REG_CONFIG		0x0c
+#define MCP3911_CONFIG_CLKEXT		BIT(1)
+#define MCP3911_CONFIG_VREFEXT		BIT(2)
+
+#define MCP3911_REG_OFFCAL_CH0		0x0e
+#define MCP3911_REG_GAINCAL_CH0		0x11
+#define MCP3911_REG_OFFCAL_CH1		0x14
+#define MCP3911_REG_GAINCAL_CH1		0x17
+#define MCP3911_REG_VREFCAL		0x1a
+
+#define MCP3911_CHANNEL(x)		(MCP3911_REG_CHANNEL0 + x * 3)
+#define MCP3911_OFFCAL(x)		(MCP3911_REG_OFFCAL_CH0 + x * 6)
+
+/* Internal voltage reference in uV */
+#define MCP3911_INT_VREF_UV		1200000
+
+#define MCP3911_REG_READ(reg, id)	((((reg) << 1) | ((id) << 5) | (1 << 0)) & 0xff)
+#define MCP3911_REG_WRITE(reg, id)	((((reg) << 1) | ((id) << 5) | (0 << 0)) & 0xff)
+
+#define MCP3911_NUM_CHANNELS		2
+
+struct mcp3911 {
+	struct spi_device *spi;
+	struct mutex lock;
+	struct regulator *vref;
+	struct clk *clki;
+	u32 dev_addr;
+};
+
+static int mcp3911_read(struct mcp3911 *adc, u8 reg, u32 *val, u8 len)
+{
+	int ret;
+
+	reg = MCP3911_REG_READ(reg, adc->dev_addr);
+	ret = spi_write_then_read(adc->spi, &reg, 1, val, len);
+	if (ret < 0)
+		return ret;
+
+	be32_to_cpus(val);
+	*val >>= ((4 - len) * 8);
+	dev_dbg(&adc->spi->dev, "reading 0x%x from register 0x%x\n", *val,
+		reg >> 1);
+	return ret;
+}
+
+static int mcp3911_write(struct mcp3911 *adc, u8 reg, u32 val, u8 len)
+{
+	dev_dbg(&adc->spi->dev, "writing 0x%x to register 0x%x\n", val, reg);
+
+	val <<= (3 - len) * 8;
+	cpu_to_be32s(&val);
+	val |= MCP3911_REG_WRITE(reg, adc->dev_addr);
+
+	return spi_write(adc->spi, &val, len + 1);
+}
+
+static int mcp3911_update(struct mcp3911 *adc, u8 reg, u32 mask,
+		u32 val, u8 len)
+{
+	u32 tmp;
+	int ret;
+
+	ret = mcp3911_read(adc, reg, &tmp, len);
+	if (ret)
+		return ret;
+
+	val &= mask;
+	val |= tmp & ~mask;
+	return mcp3911_write(adc, reg, val, len);
+}
+
+static int mcp3911_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *channel, int *val,
+			    int *val2, long mask)
+{
+	struct mcp3911 *adc = iio_priv(indio_dev);
+	int ret = -EINVAL;
+
+	mutex_lock(&adc->lock);
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = mcp3911_read(adc,
+				   MCP3911_CHANNEL(channel->channel), val, 3);
+		if (ret)
+			goto out;
+
+		ret = IIO_VAL_INT;
+		break;
+
+	case IIO_CHAN_INFO_OFFSET:
+		ret = mcp3911_read(adc,
+				   MCP3911_OFFCAL(channel->channel), val, 3);
+		if (ret)
+			goto out;
+
+		ret = IIO_VAL_INT;
+		break;
+
+	case IIO_CHAN_INFO_SCALE:
+		if (adc->vref) {
+			ret = regulator_get_voltage(adc->vref);
+			if (ret < 0) {
+				dev_err(indio_dev->dev.parent,
+					"failed to get vref voltage: %d\n",
+				       ret);
+				goto out;
+			}
+
+			*val = ret / 1000;
+		} else {
+			*val = MCP3911_INT_VREF_UV;
+		}
+
+		*val2 = 24;
+		ret = IIO_VAL_FRACTIONAL_LOG2;
+		break;
+	}
+
+out:
+	mutex_unlock(&adc->lock);
+	return ret;
+}
+
+static int mcp3911_write_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *channel, int val,
+			    int val2, long mask)
+{
+	struct mcp3911 *adc = iio_priv(indio_dev);
+	int ret = -EINVAL;
+
+	mutex_lock(&adc->lock);
+	switch (mask) {
+	case IIO_CHAN_INFO_OFFSET:
+		if (val2 != 0) {
+			ret = -EINVAL;
+			goto out;
+		}
+
+		/* Write offset */
+		ret = mcp3911_write(adc, MCP3911_OFFCAL(channel->channel), val,
+				    3);
+		if (ret)
+			goto out;
+
+		/* Enable offset*/
+		ret = mcp3911_update(adc, MCP3911_REG_STATUSCOM,
+				MCP3911_STATUSCOM_EN_OFFCAL,
+				MCP3911_STATUSCOM_EN_OFFCAL, 2);
+		break;
+	}
+
+out:
+	mutex_unlock(&adc->lock);
+	return ret;
+}
+
+#define MCP3911_CHAN(idx) {					\
+		.type = IIO_VOLTAGE,				\
+		.indexed = 1,					\
+		.channel = idx,					\
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |	\
+			BIT(IIO_CHAN_INFO_OFFSET) |		\
+			BIT(IIO_CHAN_INFO_SCALE),		\
+}
+
+static const struct iio_chan_spec mcp3911_channels[] = {
+	MCP3911_CHAN(0),
+	MCP3911_CHAN(1),
+};
+
+static const struct iio_info mcp3911_info = {
+	.read_raw = mcp3911_read_raw,
+	.write_raw = mcp3911_write_raw,
+};
+
+static int mcp3911_config(struct mcp3911 *adc, struct device_node *of_node)
+{
+	u32 configreg;
+	int ret;
+
+	of_property_read_u32(of_node, "device-addr", &adc->dev_addr);
+	if (adc->dev_addr > 3) {
+		dev_err(&adc->spi->dev,
+			"invalid device address (%i). Must be in range 0-3.\n",
+			adc->dev_addr);
+		return -EINVAL;
+	}
+	dev_dbg(&adc->spi->dev, "use device address %i\n", adc->dev_addr);
+
+	ret = mcp3911_read(adc, MCP3911_REG_CONFIG, &configreg, 2);
+	if (ret)
+		return ret;
+
+	if (adc->vref) {
+		dev_dbg(&adc->spi->dev, "use external voltage reference\n");
+		configreg |= MCP3911_CONFIG_VREFEXT;
+	} else {
+		dev_dbg(&adc->spi->dev,
+			"use internal voltage reference (1.2V)\n");
+		configreg &= ~MCP3911_CONFIG_VREFEXT;
+	}
+
+	if (adc->clki) {
+		dev_dbg(&adc->spi->dev, "use external clock as clocksource\n");
+		configreg |= MCP3911_CONFIG_CLKEXT;
+	} else {
+		dev_dbg(&adc->spi->dev,
+			"use crystal oscillator as clocksource\n");
+		configreg &= ~MCP3911_CONFIG_CLKEXT;
+	}
+
+	return  mcp3911_write(adc, MCP3911_REG_CONFIG, configreg, 2);
+}
+
+static int mcp3911_probe(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev;
+	struct mcp3911 *adc;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	adc = iio_priv(indio_dev);
+	adc->spi = spi;
+
+	adc->vref = devm_regulator_get_optional(&adc->spi->dev, "vref");
+	if (IS_ERR(adc->vref)) {
+		if (PTR_ERR(adc->vref) == -ENODEV) {
+			adc->vref = NULL;
+		} else {
+			dev_err(&adc->spi->dev,
+				"failed to get regulator (%ld)\n",
+				PTR_ERR(adc->vref));
+			return PTR_ERR(adc->vref);
+		}
+
+	} else {
+		ret = regulator_enable(adc->vref);
+		if (ret)
+			return ret;
+	}
+
+	adc->clki = devm_clk_get(&adc->spi->dev, NULL);
+	if (IS_ERR(adc->clki)) {
+		if (PTR_ERR(adc->clki) == -ENOENT) {
+			adc->clki = NULL;
+		} else {
+			dev_err(&adc->spi->dev,
+				"failed to get adc clk (%ld)\n",
+				PTR_ERR(adc->clki));
+			ret = PTR_ERR(adc->clki);
+			goto reg_disable;
+		}
+	} else {
+		ret = clk_prepare_enable(adc->clki);
+		if (ret < 0) {
+			dev_err(&adc->spi->dev,
+				"Failed to enable clki: %d\n", ret);
+			goto reg_disable;
+		}
+	}
+
+	ret = mcp3911_config(adc, spi->dev.of_node);
+	if (ret)
+		goto clk_disable;
+
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->dev.of_node = spi->dev.of_node;
+	indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &mcp3911_info;
+	spi_set_drvdata(spi, indio_dev);
+
+	indio_dev->channels = mcp3911_channels;
+	indio_dev->num_channels = ARRAY_SIZE(mcp3911_channels);
+
+	mutex_init(&adc->lock);
+
+	ret = iio_device_register(indio_dev);
+	if (ret)
+		goto clk_disable;
+
+	return ret;
+
+clk_disable:
+	clk_disable_unprepare(adc->clki);
+reg_disable:
+	if (adc->vref)
+		regulator_disable(adc->vref);
+
+	return ret;
+}
+
+static int mcp3911_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct mcp3911 *adc = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+
+	clk_disable_unprepare(adc->clki);
+	if (adc->vref)
+		regulator_disable(adc->vref);
+
+	return 0;
+}
+
+static const struct of_device_id mcp3911_dt_ids[] = {
+	{ .compatible = "microchip,mcp3911" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, mcp3911_dt_ids);
+
+static const struct spi_device_id mcp3911_id[] = {
+	{ "mcp3911", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, mcp3911_id);
+
+static struct spi_driver mcp3911_driver = {
+	.driver = {
+		.name = "mcp3911",
+		.of_match_table = mcp3911_dt_ids,
+	},
+	.probe = mcp3911_probe,
+	.remove = mcp3911_remove,
+	.id_table = mcp3911_id,
+};
+module_spi_driver(mcp3911_driver);
+
+MODULE_AUTHOR("Marcus Folkesson <marcus.folkesson@gmail.com>");
+MODULE_AUTHOR("Kent Gustavsson <kent@minoris.se>");
+MODULE_DESCRIPTION("Microchip Technology MCP3911");
+MODULE_LICENSE("GPL v2");

drivers/iio/adc/meson_saradc.c

@@ -148,7 +148,6 @@
 	#define MESON_SAR_ADC_DELTA_10_TS_REVE1			BIT(26)
 	#define MESON_SAR_ADC_DELTA_10_CHAN1_DELTA_VALUE_MASK	GENMASK(25, 16)
 	#define MESON_SAR_ADC_DELTA_10_TS_REVE0			BIT(15)
-	#define MESON_SAR_ADC_DELTA_10_TS_C_SHIFT		11
 	#define MESON_SAR_ADC_DELTA_10_TS_C_MASK		GENMASK(14, 11)
 	#define MESON_SAR_ADC_DELTA_10_TS_VBG_EN		BIT(10)
 	#define MESON_SAR_ADC_DELTA_10_CHAN0_DELTA_VALUE_MASK	GENMASK(9, 0)
@@ -173,6 +172,7 @@
 	.type = IIO_VOLTAGE,						\
 	.indexed = 1,							\
 	.channel = _chan,						\
+	.address = _chan,						\
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |			\
 				BIT(IIO_CHAN_INFO_AVERAGE_RAW),		\
 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |		\
@@ -235,7 +235,7 @@ struct meson_sar_adc_data {
 struct meson_sar_adc_priv {
 	struct regmap				*regmap;
 	struct regulator			*vref;
-	const struct meson_sar_adc_data		*data;
+	const struct meson_sar_adc_param	*param;
 	struct clk				*clkin;
 	struct clk				*core_clk;
 	struct clk				*adc_sel_clk;
@@ -280,7 +280,7 @@ static int meson_sar_adc_calib_val(struct iio_dev *indio_dev, int val)
 	/* use val_calib = scale * val_raw + offset calibration function */
 	tmp = div_s64((s64)val * priv->calibscale, MILLION) + priv->calibbias;
 
-	return clamp(tmp, 0, (1 << priv->data->param->resolution) - 1);
+	return clamp(tmp, 0, (1 << priv->param->resolution) - 1);
 }
 
 static int meson_sar_adc_wait_busy_clear(struct iio_dev *indio_dev)
@@ -324,15 +324,15 @@ static int meson_sar_adc_read_raw_sample(struct iio_dev *indio_dev,
 
 	regmap_read(priv->regmap, MESON_SAR_ADC_FIFO_RD, &regval);
 	fifo_chan = FIELD_GET(MESON_SAR_ADC_FIFO_RD_CHAN_ID_MASK, regval);
-	if (fifo_chan != chan->channel) {
+	if (fifo_chan != chan->address) {
 		dev_err(&indio_dev->dev,
-			"ADC FIFO entry belongs to channel %d instead of %d\n",
-			fifo_chan, chan->channel);
+			"ADC FIFO entry belongs to channel %d instead of %lu\n",
+			fifo_chan, chan->address);
 		return -EINVAL;
 	}
 
 	fifo_val = FIELD_GET(MESON_SAR_ADC_FIFO_RD_SAMPLE_VALUE_MASK, regval);
-	fifo_val &= GENMASK(priv->data->param->resolution - 1, 0);
+	fifo_val &= GENMASK(priv->param->resolution - 1, 0);
 	*val = meson_sar_adc_calib_val(indio_dev, fifo_val);
 
 	return 0;
@@ -344,16 +344,16 @@ static void meson_sar_adc_set_averaging(struct iio_dev *indio_dev,
 					enum meson_sar_adc_num_samples samples)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
-	int val, channel = chan->channel;
+	int val, address = chan->address;
 
-	val = samples << MESON_SAR_ADC_AVG_CNTL_NUM_SAMPLES_SHIFT(channel);
+	val = samples << MESON_SAR_ADC_AVG_CNTL_NUM_SAMPLES_SHIFT(address);
 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_AVG_CNTL,
-			   MESON_SAR_ADC_AVG_CNTL_NUM_SAMPLES_MASK(channel),
+			   MESON_SAR_ADC_AVG_CNTL_NUM_SAMPLES_MASK(address),
 			   val);
 
-	val = mode << MESON_SAR_ADC_AVG_CNTL_AVG_MODE_SHIFT(channel);
+	val = mode << MESON_SAR_ADC_AVG_CNTL_AVG_MODE_SHIFT(address);
 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_AVG_CNTL,
-			   MESON_SAR_ADC_AVG_CNTL_AVG_MODE_MASK(channel), val);
+			   MESON_SAR_ADC_AVG_CNTL_AVG_MODE_MASK(address), val);
 }
 
 static void meson_sar_adc_enable_channel(struct iio_dev *indio_dev,
@@ -373,23 +373,23 @@ static void meson_sar_adc_enable_channel(struct iio_dev *indio_dev,
 
 	/* map channel index 0 to the channel which we want to read */
 	regval = FIELD_PREP(MESON_SAR_ADC_CHAN_LIST_ENTRY_MASK(0),
-			    chan->channel);
+			    chan->address);
 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_CHAN_LIST,
 			   MESON_SAR_ADC_CHAN_LIST_ENTRY_MASK(0), regval);
 
 	regval = FIELD_PREP(MESON_SAR_ADC_DETECT_IDLE_SW_DETECT_MUX_MASK,
-			    chan->channel);
+			    chan->address);
 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_DETECT_IDLE_SW,
 			   MESON_SAR_ADC_DETECT_IDLE_SW_DETECT_MUX_MASK,
 			   regval);
 
 	regval = FIELD_PREP(MESON_SAR_ADC_DETECT_IDLE_SW_IDLE_MUX_SEL_MASK,
-			    chan->channel);
+			    chan->address);
 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_DETECT_IDLE_SW,
 			   MESON_SAR_ADC_DETECT_IDLE_SW_IDLE_MUX_SEL_MASK,
 			   regval);
 
-	if (chan->channel == 6)
+	if (chan->address == 6)
 		regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELTA_10,
 				   MESON_SAR_ADC_DELTA_10_TEMP_SEL, 0);
 }
@@ -451,7 +451,7 @@ static int meson_sar_adc_lock(struct iio_dev *indio_dev)
 
 	mutex_lock(&indio_dev->mlock);
 
-	if (priv->data->param->has_bl30_integration) {
+	if (priv->param->has_bl30_integration) {
 		/* prevent BL30 from using the SAR ADC while we are using it */
 		regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY,
 				MESON_SAR_ADC_DELAY_KERNEL_BUSY,
@@ -479,7 +479,7 @@ static void meson_sar_adc_unlock(struct iio_dev *indio_dev)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
 
-	if (priv->data->param->has_bl30_integration)
+	if (priv->param->has_bl30_integration)
 		/* allow BL30 to use the SAR ADC again */
 		regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY,
 				MESON_SAR_ADC_DELAY_KERNEL_BUSY, 0);
@@ -527,8 +527,8 @@ static int meson_sar_adc_get_sample(struct iio_dev *indio_dev,
 
 	if (ret) {
 		dev_warn(indio_dev->dev.parent,
-			 "failed to read sample for channel %d: %d\n",
-			 chan->channel, ret);
+			 "failed to read sample for channel %lu: %d\n",
+			 chan->address, ret);
 		return ret;
 	}
 
@@ -563,7 +563,7 @@ static int meson_sar_adc_iio_info_read_raw(struct iio_dev *indio_dev,
 		}
 
 		*val = ret / 1000;
-		*val2 = priv->data->param->resolution;
+		*val2 = priv->param->resolution;
 		return IIO_VAL_FRACTIONAL_LOG2;
 
 	case IIO_CHAN_INFO_CALIBBIAS:
@@ -636,7 +636,7 @@ static int meson_sar_adc_init(struct iio_dev *indio_dev)
 	 */
 	meson_sar_adc_set_chan7_mux(indio_dev, CHAN7_MUX_CH7_INPUT);
 
-	if (priv->data->param->has_bl30_integration) {
+	if (priv->param->has_bl30_integration) {
 		/*
 		 * leave sampling delay and the input clocks as configured by
 		 * BL30 to make sure BL30 gets the values it expects when
@@ -716,7 +716,7 @@ static int meson_sar_adc_init(struct iio_dev *indio_dev)
 		return ret;
 	}
 
-	ret = clk_set_rate(priv->adc_clk, priv->data->param->clock_rate);
+	ret = clk_set_rate(priv->adc_clk, priv->param->clock_rate);
 	if (ret) {
 		dev_err(indio_dev->dev.parent,
 			"failed to set adc clock rate\n");
@@ -729,7 +729,7 @@ static int meson_sar_adc_init(struct iio_dev *indio_dev)
 static void meson_sar_adc_set_bandgap(struct iio_dev *indio_dev, bool on_off)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
-	const struct meson_sar_adc_param *param = priv->data->param;
+	const struct meson_sar_adc_param *param = priv->param;
 	u32 enable_mask;
 
 	if (param->bandgap_reg == MESON_SAR_ADC_REG11)
@@ -849,13 +849,13 @@ static int meson_sar_adc_calib(struct iio_dev *indio_dev)
 	int ret, nominal0, nominal1, value0, value1;
 
 	/* use points 25% and 75% for calibration */
-	nominal0 = (1 << priv->data->param->resolution) / 4;
-	nominal1 = (1 << priv->data->param->resolution) * 3 / 4;
+	nominal0 = (1 << priv->param->resolution) / 4;
+	nominal1 = (1 << priv->param->resolution) * 3 / 4;
 
 	meson_sar_adc_set_chan7_mux(indio_dev, CHAN7_MUX_VDD_DIV4);
 	usleep_range(10, 20);
 	ret = meson_sar_adc_get_sample(indio_dev,
-				       &meson_sar_adc_iio_channels[7],
+				       &indio_dev->channels[7],
 				       MEAN_AVERAGING, EIGHT_SAMPLES, &value0);
 	if (ret < 0)
 		goto out;
@@ -863,7 +863,7 @@ static int meson_sar_adc_calib(struct iio_dev *indio_dev)
 	meson_sar_adc_set_chan7_mux(indio_dev, CHAN7_MUX_VDD_MUL3_DIV4);
 	usleep_range(10, 20);
 	ret = meson_sar_adc_get_sample(indio_dev,
-				       &meson_sar_adc_iio_channels[7],
+				       &indio_dev->channels[7],
 				       MEAN_AVERAGING, EIGHT_SAMPLES, &value1);
 	if (ret < 0)
 		goto out;
@@ -979,11 +979,11 @@ MODULE_DEVICE_TABLE(of, meson_sar_adc_of_match);
 
 static int meson_sar_adc_probe(struct platform_device *pdev)
 {
+	const struct meson_sar_adc_data *match_data;
 	struct meson_sar_adc_priv *priv;
 	struct iio_dev *indio_dev;
 	struct resource *res;
 	void __iomem *base;
-	const struct of_device_id *match;
 	int irq, ret;
 
 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*priv));
@@ -995,15 +995,15 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 	priv = iio_priv(indio_dev);
 	init_completion(&priv->done);
 
-	match = of_match_device(meson_sar_adc_of_match, &pdev->dev);
-	if (!match) {
-		dev_err(&pdev->dev, "failed to match device\n");
+	match_data = of_device_get_match_data(&pdev->dev);
+	if (!match_data) {
+		dev_err(&pdev->dev, "failed to get match data\n");
 		return -ENODEV;
 	}
 
-	priv->data = match->data;
+	priv->param = match_data->param;
 
-	indio_dev->name = priv->data->name;
+	indio_dev->name = match_data->name;
 	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->modes = INDIO_DIRECT_MODE;
@@ -1027,7 +1027,7 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 		return ret;
 
 	priv->regmap = devm_regmap_init_mmio(&pdev->dev, base,
-					     priv->data->param->regmap_config);
+					     priv->param->regmap_config);
 	if (IS_ERR(priv->regmap))
 		return PTR_ERR(priv->regmap);
 

drivers/iio/adc/qcom-pm8xxx-xoadc.c

@@ -708,8 +708,8 @@ static int pm8xxx_of_xlate(struct iio_dev *indio_dev,
 	 * mux.
 	 */
 	if (iiospec->args_count != 2) {
-		dev_err(&indio_dev->dev, "wrong number of arguments for %s need 2 got %d\n",
-			iiospec->np->name,
+		dev_err(&indio_dev->dev, "wrong number of arguments for %pOFn need 2 got %d\n",
+			iiospec->np,
 			iiospec->args_count);
 		return -EINVAL;
 	}

drivers/iio/adc/qcom-spmi-adc5.c

@@ -0,0 +1,793 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/bitops.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/iio/iio.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/log2.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/iio/qcom,spmi-vadc.h>
+#include "qcom-vadc-common.h"
+
+#define ADC5_USR_REVISION1			0x0
+#define ADC5_USR_STATUS1			0x8
+#define ADC5_USR_STATUS1_REQ_STS		BIT(1)
+#define ADC5_USR_STATUS1_EOC			BIT(0)
+#define ADC5_USR_STATUS1_REQ_STS_EOC_MASK	0x3
+
+#define ADC5_USR_STATUS2			0x9
+#define ADC5_USR_STATUS2_CONV_SEQ_MASK		0x70
+#define ADC5_USR_STATUS2_CONV_SEQ_MASK_SHIFT	0x5
+
+#define ADC5_USR_IBAT_MEAS			0xf
+#define ADC5_USR_IBAT_MEAS_SUPPORTED		BIT(0)
+
+#define ADC5_USR_DIG_PARAM			0x42
+#define ADC5_USR_DIG_PARAM_CAL_VAL		BIT(6)
+#define ADC5_USR_DIG_PARAM_CAL_VAL_SHIFT	6
+#define ADC5_USR_DIG_PARAM_CAL_SEL		0x30
+#define ADC5_USR_DIG_PARAM_CAL_SEL_SHIFT	4
+#define ADC5_USR_DIG_PARAM_DEC_RATIO_SEL	0xc
+#define ADC5_USR_DIG_PARAM_DEC_RATIO_SEL_SHIFT	2
+
+#define ADC5_USR_FAST_AVG_CTL			0x43
+#define ADC5_USR_FAST_AVG_CTL_EN		BIT(7)
+#define ADC5_USR_FAST_AVG_CTL_SAMPLES_MASK	0x7
+
+#define ADC5_USR_CH_SEL_CTL			0x44
+
+#define ADC5_USR_DELAY_CTL			0x45
+#define ADC5_USR_HW_SETTLE_DELAY_MASK		0xf
+
+#define ADC5_USR_EN_CTL1			0x46
+#define ADC5_USR_EN_CTL1_ADC_EN			BIT(7)
+
+#define ADC5_USR_CONV_REQ			0x47
+#define ADC5_USR_CONV_REQ_REQ			BIT(7)
+
+#define ADC5_USR_DATA0				0x50
+
+#define ADC5_USR_DATA1				0x51
+
+#define ADC5_USR_IBAT_DATA0			0x52
+
+#define ADC5_USR_IBAT_DATA1			0x53
+
+/*
+ * Conversion time varies based on the decimation, clock rate, fast average
+ * samples and measurements queued across different VADC peripherals.
+ * Set the timeout to a max of 100ms.
+ */
+#define ADC5_CONV_TIME_MIN_US			263
+#define ADC5_CONV_TIME_MAX_US			264
+#define ADC5_CONV_TIME_RETRY			400
+#define ADC5_CONV_TIMEOUT			msecs_to_jiffies(100)
+
+/* Digital version >= 5.3 supports hw_settle_2 */
+#define ADC5_HW_SETTLE_DIFF_MINOR		3
+#define ADC5_HW_SETTLE_DIFF_MAJOR		5
+
+enum adc5_cal_method {
+	ADC5_NO_CAL = 0,
+	ADC5_RATIOMETRIC_CAL,
+	ADC5_ABSOLUTE_CAL
+};
+
+enum adc5_cal_val {
+	ADC5_TIMER_CAL = 0,
+	ADC5_NEW_CAL
+};
+
+/**
+ * struct adc5_channel_prop - ADC channel property.
+ * @channel: channel number, refer to the channel list.
+ * @cal_method: calibration method.
+ * @cal_val: calibration value
+ * @decimation: sampling rate supported for the channel.
+ * @prescale: channel scaling performed on the input signal.
+ * @hw_settle_time: the time between AMUX being configured and the
+ *	start of conversion.
+ * @avg_samples: ability to provide single result from the ADC
+ *	that is an average of multiple measurements.
+ * @scale_fn_type: Represents the scaling function to convert voltage
+ *	physical units desired by the client for the channel.
+ * @datasheet_name: Channel name used in device tree.
+ */
+struct adc5_channel_prop {
+	unsigned int		channel;
+	enum adc5_cal_method	cal_method;
+	enum adc5_cal_val	cal_val;
+	unsigned int		decimation;
+	unsigned int		prescale;
+	unsigned int		hw_settle_time;
+	unsigned int		avg_samples;
+	enum vadc_scale_fn_type	scale_fn_type;
+	const char		*datasheet_name;
+};
+
+/**
+ * struct adc5_chip - ADC private structure.
+ * @regmap: SPMI ADC5 peripheral register map field.
+ * @dev: SPMI ADC5 device.
+ * @base: base address for the ADC peripheral.
+ * @nchannels: number of ADC channels.
+ * @chan_props: array of ADC channel properties.
+ * @iio_chans: array of IIO channels specification.
+ * @poll_eoc: use polling instead of interrupt.
+ * @complete: ADC result notification after interrupt is received.
+ * @lock: ADC lock for access to the peripheral.
+ * @data: software configuration data.
+ */
+struct adc5_chip {
+	struct regmap		*regmap;
+	struct device		*dev;
+	u16			base;
+	unsigned int		nchannels;
+	struct adc5_channel_prop	*chan_props;
+	struct iio_chan_spec	*iio_chans;
+	bool			poll_eoc;
+	struct completion	complete;
+	struct mutex		lock;
+	const struct adc5_data	*data;
+};
+
+static const struct vadc_prescale_ratio adc5_prescale_ratios[] = {
+	{.num =  1, .den =  1},
+	{.num =  1, .den =  3},
+	{.num =  1, .den =  4},
+	{.num =  1, .den =  6},
+	{.num =  1, .den = 20},
+	{.num =  1, .den =  8},
+	{.num = 10, .den = 81},
+	{.num =  1, .den = 10},
+	{.num =  1, .den = 16}
+};
+
+static int adc5_read(struct adc5_chip *adc, u16 offset, u8 *data, int len)
+{
+	return regmap_bulk_read(adc->regmap, adc->base + offset, data, len);
+}
+
+static int adc5_write(struct adc5_chip *adc, u16 offset, u8 *data, int len)
+{
+	return regmap_bulk_write(adc->regmap, adc->base + offset, data, len);
+}
+
+static int adc5_prescaling_from_dt(u32 num, u32 den)
+{
+	unsigned int pre;
+
+	for (pre = 0; pre < ARRAY_SIZE(adc5_prescale_ratios); pre++)
+		if (adc5_prescale_ratios[pre].num == num &&
+		    adc5_prescale_ratios[pre].den == den)
+			break;
+
+	if (pre == ARRAY_SIZE(adc5_prescale_ratios))
+		return -EINVAL;
+
+	return pre;
+}
+
+static int adc5_hw_settle_time_from_dt(u32 value,
+					const unsigned int *hw_settle)
+{
+	unsigned int i;
+
+	for (i = 0; i < VADC_HW_SETTLE_SAMPLES_MAX; i++) {
+		if (value == hw_settle[i])
+			return i;
+	}
+
+	return -EINVAL;
+}
+
+static int adc5_avg_samples_from_dt(u32 value)
+{
+	if (!is_power_of_2(value) || value > ADC5_AVG_SAMPLES_MAX)
+		return -EINVAL;
+
+	return __ffs(value);
+}
+
+static int adc5_decimation_from_dt(u32 value,
+					const unsigned int *decimation)
+{
+	unsigned int i;
+
+	for (i = 0; i < ADC5_DECIMATION_SAMPLES_MAX; i++) {
+		if (value == decimation[i])
+			return i;
+	}
+
+	return -EINVAL;
+}
+
+static int adc5_read_voltage_data(struct adc5_chip *adc, u16 *data)
+{
+	int ret;
+	u8 rslt_lsb, rslt_msb;
+
+	ret = adc5_read(adc, ADC5_USR_DATA0, &rslt_lsb, sizeof(rslt_lsb));
+	if (ret)
+		return ret;
+
+	ret = adc5_read(adc, ADC5_USR_DATA1, &rslt_msb, sizeof(rslt_lsb));
+	if (ret)
+		return ret;
+
+	*data = (rslt_msb << 8) | rslt_lsb;
+
+	if (*data == ADC5_USR_DATA_CHECK) {
+		pr_err("Invalid data:0x%x\n", *data);
+		return -EINVAL;
+	}
+
+	pr_debug("voltage raw code:0x%x\n", *data);
+
+	return 0;
+}
+
+static int adc5_poll_wait_eoc(struct adc5_chip *adc)
+{
+	unsigned int count, retry = ADC5_CONV_TIME_RETRY;
+	u8 status1;
+	int ret;
+
+	for (count = 0; count < retry; count++) {
+		ret = adc5_read(adc, ADC5_USR_STATUS1, &status1,
+							sizeof(status1));
+		if (ret)
+			return ret;
+
+		status1 &= ADC5_USR_STATUS1_REQ_STS_EOC_MASK;
+		if (status1 == ADC5_USR_STATUS1_EOC)
+			return 0;
+
+		usleep_range(ADC5_CONV_TIME_MIN_US, ADC5_CONV_TIME_MAX_US);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static void adc5_update_dig_param(struct adc5_chip *adc,
+			struct adc5_channel_prop *prop, u8 *data)
+{
+	/* Update calibration value */
+	*data &= ~ADC5_USR_DIG_PARAM_CAL_VAL;
+	*data |= (prop->cal_val << ADC5_USR_DIG_PARAM_CAL_VAL_SHIFT);
+
+	/* Update calibration select */
+	*data &= ~ADC5_USR_DIG_PARAM_CAL_SEL;
+	*data |= (prop->cal_method << ADC5_USR_DIG_PARAM_CAL_SEL_SHIFT);
+
+	/* Update decimation ratio select */
+	*data &= ~ADC5_USR_DIG_PARAM_DEC_RATIO_SEL;
+	*data |= (prop->decimation << ADC5_USR_DIG_PARAM_DEC_RATIO_SEL_SHIFT);
+}
+
+static int adc5_configure(struct adc5_chip *adc,
+			struct adc5_channel_prop *prop)
+{
+	int ret;
+	u8 buf[6];
+
+	/* Read registers 0x42 through 0x46 */
+	ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	/* Digital param selection */
+	adc5_update_dig_param(adc, prop, &buf[0]);
+
+	/* Update fast average sample value */
+	buf[1] &= (u8) ~ADC5_USR_FAST_AVG_CTL_SAMPLES_MASK;
+	buf[1] |= prop->avg_samples;
+
+	/* Select ADC channel */
+	buf[2] = prop->channel;
+
+	/* Select HW settle delay for channel */
+	buf[3] &= (u8) ~ADC5_USR_HW_SETTLE_DELAY_MASK;
+	buf[3] |= prop->hw_settle_time;
+
+	/* Select ADC enable */
+	buf[4] |= ADC5_USR_EN_CTL1_ADC_EN;
+
+	/* Select CONV request */
+	buf[5] |= ADC5_USR_CONV_REQ_REQ;
+
+	if (!adc->poll_eoc)
+		reinit_completion(&adc->complete);
+
+	return adc5_write(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
+}
+
+static int adc5_do_conversion(struct adc5_chip *adc,
+			struct adc5_channel_prop *prop,
+			struct iio_chan_spec const *chan,
+			u16 *data_volt, u16 *data_cur)
+{
+	int ret;
+
+	mutex_lock(&adc->lock);
+
+	ret = adc5_configure(adc, prop);
+	if (ret) {
+		pr_err("ADC configure failed with %d\n", ret);
+		goto unlock;
+	}
+
+	if (adc->poll_eoc) {
+		ret = adc5_poll_wait_eoc(adc);
+		if (ret < 0) {
+			pr_err("EOC bit not set\n");
+			goto unlock;
+		}
+	} else {
+		ret = wait_for_completion_timeout(&adc->complete,
+							ADC5_CONV_TIMEOUT);
+		if (!ret) {
+			pr_debug("Did not get completion timeout.\n");
+			ret = adc5_poll_wait_eoc(adc);
+			if (ret < 0) {
+				pr_err("EOC bit not set\n");
+				goto unlock;
+			}
+		}
+	}
+
+	ret = adc5_read_voltage_data(adc, data_volt);
+unlock:
+	mutex_unlock(&adc->lock);
+
+	return ret;
+}
+
+static irqreturn_t adc5_isr(int irq, void *dev_id)
+{
+	struct adc5_chip *adc = dev_id;
+
+	complete(&adc->complete);
+
+	return IRQ_HANDLED;
+}
+
+static int adc5_of_xlate(struct iio_dev *indio_dev,
+				const struct of_phandle_args *iiospec)
+{
+	struct adc5_chip *adc = iio_priv(indio_dev);
+	int i;
+
+	for (i = 0; i < adc->nchannels; i++)
+		if (adc->chan_props[i].channel == iiospec->args[0])
+			return i;
+
+	return -EINVAL;
+}
+
+static int adc5_read_raw(struct iio_dev *indio_dev,
+			 struct iio_chan_spec const *chan, int *val, int *val2,
+			 long mask)
+{
+	struct adc5_chip *adc = iio_priv(indio_dev);
+	struct adc5_channel_prop *prop;
+	u16 adc_code_volt, adc_code_cur;
+	int ret;
+
+	prop = &adc->chan_props[chan->address];
+
+	switch (mask) {
+	case IIO_CHAN_INFO_PROCESSED:
+		ret = adc5_do_conversion(adc, prop, chan,
+				&adc_code_volt, &adc_code_cur);
+		if (ret)
+			return ret;
+
+		ret = qcom_adc5_hw_scale(prop->scale_fn_type,
+			&adc5_prescale_ratios[prop->prescale],
+			adc->data,
+			adc_code_volt, val);
+		if (ret)
+			return ret;
+
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct iio_info adc5_info = {
+	.read_raw = adc5_read_raw,
+	.of_xlate = adc5_of_xlate,
+};
+
+struct adc5_channels {
+	const char *datasheet_name;
+	unsigned int prescale_index;
+	enum iio_chan_type type;
+	long info_mask;
+	enum vadc_scale_fn_type scale_fn_type;
+};
+
+#define ADC5_CHAN(_dname, _type, _mask, _pre, _scale)			\
+	{								\
+		.datasheet_name = _dname,				\
+		.prescale_index = _pre,					\
+		.type = _type,						\
+		.info_mask = _mask,					\
+		.scale_fn_type = _scale,				\
+	},								\
+
+#define ADC5_CHAN_TEMP(_dname, _pre, _scale)				\
+	ADC5_CHAN(_dname, IIO_TEMP,					\
+		BIT(IIO_CHAN_INFO_PROCESSED),				\
+		_pre, _scale)						\
+
+#define ADC5_CHAN_VOLT(_dname, _pre, _scale)				\
+	ADC5_CHAN(_dname, IIO_VOLTAGE,					\
+		  BIT(IIO_CHAN_INFO_PROCESSED),				\
+		  _pre, _scale)						\
+
+static const struct adc5_channels adc5_chans_pmic[ADC5_MAX_CHANNEL] = {
+	[ADC5_REF_GND]		= ADC5_CHAN_VOLT("ref_gnd", 1,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_1P25VREF]		= ADC5_CHAN_VOLT("vref_1p25", 1,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_VPH_PWR]		= ADC5_CHAN_VOLT("vph_pwr", 3,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_VBAT_SNS]		= ADC5_CHAN_VOLT("vbat_sns", 3,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_DIE_TEMP]		= ADC5_CHAN_TEMP("die_temp", 1,
+					SCALE_HW_CALIB_PMIC_THERM)
+	[ADC5_USB_IN_I]		= ADC5_CHAN_VOLT("usb_in_i_uv", 1,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_USB_IN_V_16]	= ADC5_CHAN_VOLT("usb_in_v_div_16", 16,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_CHG_TEMP]		= ADC5_CHAN_TEMP("chg_temp", 1,
+					SCALE_HW_CALIB_PM5_CHG_TEMP)
+	/* Charger prescales SBUx and MID_CHG to fit within 1.8V upper unit */
+	[ADC5_SBUx]		= ADC5_CHAN_VOLT("chg_sbux", 3,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_MID_CHG_DIV6]	= ADC5_CHAN_VOLT("chg_mid_chg", 6,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_XO_THERM_100K_PU]	= ADC5_CHAN_TEMP("xo_therm", 1,
+					SCALE_HW_CALIB_XOTHERM)
+	[ADC5_AMUX_THM1_100K_PU] = ADC5_CHAN_TEMP("amux_thm1_100k_pu", 1,
+					SCALE_HW_CALIB_THERM_100K_PULLUP)
+	[ADC5_AMUX_THM2_100K_PU] = ADC5_CHAN_TEMP("amux_thm2_100k_pu", 1,
+					SCALE_HW_CALIB_THERM_100K_PULLUP)
+	[ADC5_AMUX_THM3_100K_PU] = ADC5_CHAN_TEMP("amux_thm3_100k_pu", 1,
+					SCALE_HW_CALIB_THERM_100K_PULLUP)
+	[ADC5_AMUX_THM2]	= ADC5_CHAN_TEMP("amux_thm2", 1,
+					SCALE_HW_CALIB_PM5_SMB_TEMP)
+};
+
+static const struct adc5_channels adc5_chans_rev2[ADC5_MAX_CHANNEL] = {
+	[ADC5_REF_GND]		= ADC5_CHAN_VOLT("ref_gnd", 1,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_1P25VREF]		= ADC5_CHAN_VOLT("vref_1p25", 1,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_VPH_PWR]		= ADC5_CHAN_VOLT("vph_pwr", 3,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_VBAT_SNS]		= ADC5_CHAN_VOLT("vbat_sns", 3,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_VCOIN]		= ADC5_CHAN_VOLT("vcoin", 3,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC5_DIE_TEMP]		= ADC5_CHAN_TEMP("die_temp", 1,
+					SCALE_HW_CALIB_PMIC_THERM)
+	[ADC5_AMUX_THM1_100K_PU] = ADC5_CHAN_TEMP("amux_thm1_100k_pu", 1,
+					SCALE_HW_CALIB_THERM_100K_PULLUP)
+	[ADC5_AMUX_THM2_100K_PU] = ADC5_CHAN_TEMP("amux_thm2_100k_pu", 1,
+					SCALE_HW_CALIB_THERM_100K_PULLUP)
+	[ADC5_AMUX_THM3_100K_PU] = ADC5_CHAN_TEMP("amux_thm3_100k_pu", 1,
+					SCALE_HW_CALIB_THERM_100K_PULLUP)
+	[ADC5_AMUX_THM4_100K_PU] = ADC5_CHAN_TEMP("amux_thm4_100k_pu", 1,
+					SCALE_HW_CALIB_THERM_100K_PULLUP)
+	[ADC5_AMUX_THM5_100K_PU] = ADC5_CHAN_TEMP("amux_thm5_100k_pu", 1,
+					SCALE_HW_CALIB_THERM_100K_PULLUP)
+	[ADC5_XO_THERM_100K_PU]	= ADC5_CHAN_TEMP("xo_therm_100k_pu", 1,
+					SCALE_HW_CALIB_THERM_100K_PULLUP)
+};
+
+static int adc5_get_dt_channel_data(struct adc5_chip *adc,
+				    struct adc5_channel_prop *prop,
+				    struct device_node *node,
+				    const struct adc5_data *data)
+{
+	const char *name = node->name, *channel_name;
+	u32 chan, value, varr[2];
+	int ret;
+	struct device *dev = adc->dev;
+
+	ret = of_property_read_u32(node, "reg", &chan);
+	if (ret) {
+		dev_err(dev, "invalid channel number %s\n", name);
+		return ret;
+	}
+
+	if (chan > ADC5_PARALLEL_ISENSE_VBAT_IDATA ||
+	    !data->adc_chans[chan].datasheet_name) {
+		dev_err(dev, "%s invalid channel number %d\n", name, chan);
+		return -EINVAL;
+	}
+
+	/* the channel has DT description */
+	prop->channel = chan;
+
+	channel_name = of_get_property(node,
+				"label", NULL) ? : node->name;
+	if (!channel_name) {
+		pr_err("Invalid channel name\n");
+		return -EINVAL;
+	}
+	prop->datasheet_name = channel_name;
+
+	ret = of_property_read_u32(node, "qcom,decimation", &value);
+	if (!ret) {
+		ret = adc5_decimation_from_dt(value, data->decimation);
+		if (ret < 0) {
+			dev_err(dev, "%02x invalid decimation %d\n",
+				chan, value);
+			return ret;
+		}
+		prop->decimation = ret;
+	} else {
+		prop->decimation = ADC5_DECIMATION_DEFAULT;
+	}
+
+	ret = of_property_read_u32_array(node, "qcom,pre-scaling", varr, 2);
+	if (!ret) {
+		ret = adc5_prescaling_from_dt(varr[0], varr[1]);
+		if (ret < 0) {
+			dev_err(dev, "%02x invalid pre-scaling <%d %d>\n",
+				chan, varr[0], varr[1]);
+			return ret;
+		}
+		prop->prescale = ret;
+	}
+
+	ret = of_property_read_u32(node, "qcom,hw-settle-time", &value);
+	if (!ret) {
+		u8 dig_version[2];
+
+		ret = adc5_read(adc, ADC5_USR_REVISION1, dig_version,
+							sizeof(dig_version));
+		if (ret < 0) {
+			dev_err(dev, "Invalid dig version read %d\n", ret);
+			return ret;
+		}
+
+		pr_debug("dig_ver:minor:%d, major:%d\n", dig_version[0],
+						dig_version[1]);
+		/* Digital controller >= 5.3 have hw_settle_2 option */
+		if (dig_version[0] >= ADC5_HW_SETTLE_DIFF_MINOR &&
+			dig_version[1] >= ADC5_HW_SETTLE_DIFF_MAJOR)
+			ret = adc5_hw_settle_time_from_dt(value,
+							data->hw_settle_2);
+		else
+			ret = adc5_hw_settle_time_from_dt(value,
+							data->hw_settle_1);
+
+		if (ret < 0) {
+			dev_err(dev, "%02x invalid hw-settle-time %d us\n",
+				chan, value);
+			return ret;
+		}
+		prop->hw_settle_time = ret;
+	} else {
+		prop->hw_settle_time = VADC_DEF_HW_SETTLE_TIME;
+	}
+
+	ret = of_property_read_u32(node, "qcom,avg-samples", &value);
+	if (!ret) {
+		ret = adc5_avg_samples_from_dt(value);
+		if (ret < 0) {
+			dev_err(dev, "%02x invalid avg-samples %d\n",
+				chan, value);
+			return ret;
+		}
+		prop->avg_samples = ret;
+	} else {
+		prop->avg_samples = VADC_DEF_AVG_SAMPLES;
+	}
+
+	if (of_property_read_bool(node, "qcom,ratiometric"))
+		prop->cal_method = ADC5_RATIOMETRIC_CAL;
+	else
+		prop->cal_method = ADC5_ABSOLUTE_CAL;
+
+	/*
+	 * Default to using timer calibration. Using a fresh calibration value
+	 * for every conversion will increase the overall time for a request.
+	 */
+	prop->cal_val = ADC5_TIMER_CAL;
+
+	dev_dbg(dev, "%02x name %s\n", chan, name);
+
+	return 0;
+}
+
+static const struct adc5_data adc5_data_pmic = {
+	.full_scale_code_volt = 0x70e4,
+	.full_scale_code_cur = 0x2710,
+	.adc_chans = adc5_chans_pmic,
+	.decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
+				{250, 420, 840},
+	.hw_settle_1 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
+				{15, 100, 200, 300, 400, 500, 600, 700,
+				800, 900, 1, 2, 4, 6, 8, 10},
+	.hw_settle_2 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
+				{15, 100, 200, 300, 400, 500, 600, 700,
+				1, 2, 4, 8, 16, 32, 64, 128},
+};
+
+static const struct adc5_data adc5_data_pmic_rev2 = {
+	.full_scale_code_volt = 0x4000,
+	.full_scale_code_cur = 0x1800,
+	.adc_chans = adc5_chans_rev2,
+	.decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
+				{256, 512, 1024},
+	.hw_settle_1 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
+				{0, 100, 200, 300, 400, 500, 600, 700,
+				800, 900, 1, 2, 4, 6, 8, 10},
+	.hw_settle_2 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
+				{15, 100, 200, 300, 400, 500, 600, 700,
+				1, 2, 4, 8, 16, 32, 64, 128},
+};
+
+static const struct of_device_id adc5_match_table[] = {
+	{
+		.compatible = "qcom,spmi-adc5",
+		.data = &adc5_data_pmic,
+	},
+	{
+		.compatible = "qcom,spmi-adc-rev2",
+		.data = &adc5_data_pmic_rev2,
+	},
+	{ }
+};
+
+static int adc5_get_dt_data(struct adc5_chip *adc, struct device_node *node)
+{
+	const struct adc5_channels *adc_chan;
+	struct iio_chan_spec *iio_chan;
+	struct adc5_channel_prop prop, *chan_props;
+	struct device_node *child;
+	unsigned int index = 0;
+	const struct of_device_id *id;
+	const struct adc5_data *data;
+	int ret;
+
+	adc->nchannels = of_get_available_child_count(node);
+	if (!adc->nchannels)
+		return -EINVAL;
+
+	adc->iio_chans = devm_kcalloc(adc->dev, adc->nchannels,
+				       sizeof(*adc->iio_chans), GFP_KERNEL);
+	if (!adc->iio_chans)
+		return -ENOMEM;
+
+	adc->chan_props = devm_kcalloc(adc->dev, adc->nchannels,
+					sizeof(*adc->chan_props), GFP_KERNEL);
+	if (!adc->chan_props)
+		return -ENOMEM;
+
+	chan_props = adc->chan_props;
+	iio_chan = adc->iio_chans;
+	id = of_match_node(adc5_match_table, node);
+	if (id)
+		data = id->data;
+	else
+		data = &adc5_data_pmic;
+	adc->data = data;
+
+	for_each_available_child_of_node(node, child) {
+		ret = adc5_get_dt_channel_data(adc, &prop, child, data);
+		if (ret) {
+			of_node_put(child);
+			return ret;
+		}
+
+		prop.scale_fn_type =
+			data->adc_chans[prop.channel].scale_fn_type;
+		*chan_props = prop;
+		adc_chan = &data->adc_chans[prop.channel];
+
+		iio_chan->channel = prop.channel;
+		iio_chan->datasheet_name = prop.datasheet_name;
+		iio_chan->extend_name = prop.datasheet_name;
+		iio_chan->info_mask_separate = adc_chan->info_mask;
+		iio_chan->type = adc_chan->type;
+		iio_chan->address = index;
+		iio_chan++;
+		chan_props++;
+		index++;
+	}
+
+	return 0;
+}
+
+static int adc5_probe(struct platform_device *pdev)
+{
+	struct device_node *node = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	struct iio_dev *indio_dev;
+	struct adc5_chip *adc;
+	struct regmap *regmap;
+	int ret, irq_eoc;
+	u32 reg;
+
+	regmap = dev_get_regmap(dev->parent, NULL);
+	if (!regmap)
+		return -ENODEV;
+
+	ret = of_property_read_u32(node, "reg", &reg);
+	if (ret < 0)
+		return ret;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*adc));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	adc = iio_priv(indio_dev);
+	adc->regmap = regmap;
+	adc->dev = dev;
+	adc->base = reg;
+	init_completion(&adc->complete);
+	mutex_init(&adc->lock);
+
+	ret = adc5_get_dt_data(adc, node);
+	if (ret) {
+		pr_err("adc get dt data failed\n");
+		return ret;
+	}
+
+	irq_eoc = platform_get_irq(pdev, 0);
+	if (irq_eoc < 0) {
+		if (irq_eoc == -EPROBE_DEFER || irq_eoc == -EINVAL)
+			return irq_eoc;
+		adc->poll_eoc = true;
+	} else {
+		ret = devm_request_irq(dev, irq_eoc, adc5_isr, 0,
+				       "pm-adc5", adc);
+		if (ret)
+			return ret;
+	}
+
+	indio_dev->dev.parent = dev;
+	indio_dev->dev.of_node = node;
+	indio_dev->name = pdev->name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = &adc5_info;
+	indio_dev->channels = adc->iio_chans;
+	indio_dev->num_channels = adc->nchannels;
+
+	return devm_iio_device_register(dev, indio_dev);
+}
+
+static struct platform_driver adc5_driver = {
+	.driver = {
+		.name = "qcom-spmi-adc5.c",
+		.of_match_table = adc5_match_table,
+	},
+	.probe = adc5_probe,
+};
+module_platform_driver(adc5_driver);
+
+MODULE_ALIAS("platform:qcom-spmi-adc5");
+MODULE_DESCRIPTION("Qualcomm Technologies Inc. PMIC5 ADC driver");
+MODULE_LICENSE("GPL v2");

drivers/iio/adc/qcom-vadc-common.c

@@ -47,8 +47,79 @@ static const struct vadc_map_pt adcmap_100k_104ef_104fb[] = {
 	{44,	125}
 };
 
+/*
+ * Voltage to temperature table for 100k pull up for NTCG104EF104 with
+ * 1.875V reference.
+ */
+static const struct vadc_map_pt adcmap_100k_104ef_104fb_1875_vref[] = {
+	{ 1831,	-40000 },
+	{ 1814,	-35000 },
+	{ 1791,	-30000 },
+	{ 1761,	-25000 },
+	{ 1723,	-20000 },
+	{ 1675,	-15000 },
+	{ 1616,	-10000 },
+	{ 1545,	-5000 },
+	{ 1463,	0 },
+	{ 1370,	5000 },
+	{ 1268,	10000 },
+	{ 1160,	15000 },
+	{ 1049,	20000 },
+	{ 937,	25000 },
+	{ 828,	30000 },
+	{ 726,	35000 },
+	{ 630,	40000 },
+	{ 544,	45000 },
+	{ 467,	50000 },
+	{ 399,	55000 },
+	{ 340,	60000 },
+	{ 290,	65000 },
+	{ 247,	70000 },
+	{ 209,	75000 },
+	{ 179,	80000 },
+	{ 153,	85000 },
+	{ 130,	90000 },
+	{ 112,	95000 },
+	{ 96,	100000 },
+	{ 82,	105000 },
+	{ 71,	110000 },
+	{ 62,	115000 },
+	{ 53,	120000 },
+	{ 46,	125000 },
+};
+
+static int qcom_vadc_scale_hw_calib_volt(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_uv);
+static int qcom_vadc_scale_hw_calib_therm(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec);
+static int qcom_vadc_scale_hw_smb_temp(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec);
+static int qcom_vadc_scale_hw_chg5_temp(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec);
+static int qcom_vadc_scale_hw_calib_die_temp(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec);
+
+static struct qcom_adc5_scale_type scale_adc5_fn[] = {
+	[SCALE_HW_CALIB_DEFAULT] = {qcom_vadc_scale_hw_calib_volt},
+	[SCALE_HW_CALIB_THERM_100K_PULLUP] = {qcom_vadc_scale_hw_calib_therm},
+	[SCALE_HW_CALIB_XOTHERM] = {qcom_vadc_scale_hw_calib_therm},
+	[SCALE_HW_CALIB_PMIC_THERM] = {qcom_vadc_scale_hw_calib_die_temp},
+	[SCALE_HW_CALIB_PM5_CHG_TEMP] = {qcom_vadc_scale_hw_chg5_temp},
+	[SCALE_HW_CALIB_PM5_SMB_TEMP] = {qcom_vadc_scale_hw_smb_temp},
+};
+
 static int qcom_vadc_map_voltage_temp(const struct vadc_map_pt *pts,
-				      u32 tablesize, s32 input, s64 *output)
+				      u32 tablesize, s32 input, int *output)
 {
 	bool descending = 1;
 	u32 i = 0;
@@ -128,7 +199,7 @@ static int qcom_vadc_scale_therm(const struct vadc_linear_graph *calib_graph,
 				 bool absolute, u16 adc_code,
 				 int *result_mdec)
 {
-	s64 voltage = 0, result = 0;
+	s64 voltage = 0;
 	int ret;
 
 	qcom_vadc_scale_calib(calib_graph, adc_code, absolute, &voltage);
@@ -138,12 +209,11 @@ static int qcom_vadc_scale_therm(const struct vadc_linear_graph *calib_graph,
 
 	ret = qcom_vadc_map_voltage_temp(adcmap_100k_104ef_104fb,
 					 ARRAY_SIZE(adcmap_100k_104ef_104fb),
-					 voltage, &result);
+					 voltage, result_mdec);
 	if (ret)
 		return ret;
 
-	result *= 1000;
-	*result_mdec = result;
+	*result_mdec *= 1000;
 
 	return 0;
 }
@@ -191,6 +261,99 @@ static int qcom_vadc_scale_chg_temp(const struct vadc_linear_graph *calib_graph,
 	return 0;
 }
 
+static int qcom_vadc_scale_code_voltage_factor(u16 adc_code,
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				unsigned int factor)
+{
+	s64 voltage, temp, adc_vdd_ref_mv = 1875;
+
+	/*
+	 * The normal data range is between 0V to 1.875V. On cases where
+	 * we read low voltage values, the ADC code can go beyond the
+	 * range and the scale result is incorrect so we clamp the values
+	 * for the cases where the code represents a value below 0V
+	 */
+	if (adc_code > VADC5_MAX_CODE)
+		adc_code = 0;
+
+	/* (ADC code * vref_vadc (1.875V)) / full_scale_code */
+	voltage = (s64) adc_code * adc_vdd_ref_mv * 1000;
+	voltage = div64_s64(voltage, data->full_scale_code_volt);
+	if (voltage > 0) {
+		voltage *= prescale->den;
+		temp = prescale->num * factor;
+		voltage = div64_s64(voltage, temp);
+	} else {
+		voltage = 0;
+	}
+
+	return (int) voltage;
+}
+
+static int qcom_vadc_scale_hw_calib_volt(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_uv)
+{
+	*result_uv = qcom_vadc_scale_code_voltage_factor(adc_code,
+				prescale, data, 1);
+
+	return 0;
+}
+
+static int qcom_vadc_scale_hw_calib_therm(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec)
+{
+	int voltage;
+
+	voltage = qcom_vadc_scale_code_voltage_factor(adc_code,
+				prescale, data, 1000);
+
+	/* Map voltage to temperature from look-up table */
+	return qcom_vadc_map_voltage_temp(adcmap_100k_104ef_104fb_1875_vref,
+				 ARRAY_SIZE(adcmap_100k_104ef_104fb_1875_vref),
+				 voltage, result_mdec);
+}
+
+static int qcom_vadc_scale_hw_calib_die_temp(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec)
+{
+	*result_mdec = qcom_vadc_scale_code_voltage_factor(adc_code,
+				prescale, data, 2);
+	*result_mdec -= KELVINMIL_CELSIUSMIL;
+
+	return 0;
+}
+
+static int qcom_vadc_scale_hw_smb_temp(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec)
+{
+	*result_mdec = qcom_vadc_scale_code_voltage_factor(adc_code * 100,
+				prescale, data, PMIC5_SMB_TEMP_SCALE_FACTOR);
+	*result_mdec = PMIC5_SMB_TEMP_CONSTANT - *result_mdec;
+
+	return 0;
+}
+
+static int qcom_vadc_scale_hw_chg5_temp(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec)
+{
+	*result_mdec = qcom_vadc_scale_code_voltage_factor(adc_code,
+				prescale, data, 4);
+	*result_mdec = PMIC5_CHG_TEMP_SCALE_FACTOR - *result_mdec;
+
+	return 0;
+}
+
 int qcom_vadc_scale(enum vadc_scale_fn_type scaletype,
 		    const struct vadc_linear_graph *calib_graph,
 		    const struct vadc_prescale_ratio *prescale,
@@ -221,6 +384,22 @@ int qcom_vadc_scale(enum vadc_scale_fn_type scaletype,
 }
 EXPORT_SYMBOL(qcom_vadc_scale);
 
+int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype,
+		    const struct vadc_prescale_ratio *prescale,
+		    const struct adc5_data *data,
+		    u16 adc_code, int *result)
+{
+	if (!(scaletype >= SCALE_HW_CALIB_DEFAULT &&
+		scaletype < SCALE_HW_CALIB_INVALID)) {
+		pr_err("Invalid scale type %d\n", scaletype);
+		return -EINVAL;
+	}
+
+	return scale_adc5_fn[scaletype].scale_fn(prescale, data,
+					adc_code, result);
+}
+EXPORT_SYMBOL(qcom_adc5_hw_scale);
+
 int qcom_vadc_decimation_from_dt(u32 value)
 {
 	if (!is_power_of_2(value) || value < VADC_DECIMATION_MIN ||

drivers/iio/adc/qcom-vadc-common.h

@@ -25,15 +25,31 @@
 
 #define VADC_DECIMATION_MIN			512
 #define VADC_DECIMATION_MAX			4096
+#define ADC5_DEF_VBAT_PRESCALING		1 /* 1:3 */
+#define ADC5_DECIMATION_SHORT			250
+#define ADC5_DECIMATION_MEDIUM			420
+#define ADC5_DECIMATION_LONG			840
+/* Default decimation - 1024 for rev2, 840 for pmic5 */
+#define ADC5_DECIMATION_DEFAULT			2
+#define ADC5_DECIMATION_SAMPLES_MAX		3
 
 #define VADC_HW_SETTLE_DELAY_MAX		10000
+#define VADC_HW_SETTLE_SAMPLES_MAX		16
 #define VADC_AVG_SAMPLES_MAX			512
+#define ADC5_AVG_SAMPLES_MAX			16
 
 #define KELVINMIL_CELSIUSMIL			273150
+#define PMIC5_CHG_TEMP_SCALE_FACTOR		377500
+#define PMIC5_SMB_TEMP_CONSTANT			419400
+#define PMIC5_SMB_TEMP_SCALE_FACTOR		356
 
 #define PMI_CHG_SCALE_1				-138890
 #define PMI_CHG_SCALE_2				391750000000LL
 
+#define VADC5_MAX_CODE				0x7fff
+#define ADC5_FULL_SCALE_CODE			0x70e4
+#define ADC5_USR_DATA_CHECK			0x8000
+
 /**
  * struct vadc_map_pt - Map the graph representation for ADC channel
  * @x: Represent the ADC digitized code.
@@ -89,6 +105,18 @@ struct vadc_prescale_ratio {
  * SCALE_PMIC_THERM: Returns result in milli degree's Centigrade.
  * SCALE_XOTHERM: Returns XO thermistor voltage in millidegC.
  * SCALE_PMI_CHG_TEMP: Conversion for PMI CHG temp
+ * SCALE_HW_CALIB_DEFAULT: Default scaling to convert raw adc code to
+ *	voltage (uV) with hardware applied offset/slope values to adc code.
+ * SCALE_HW_CALIB_THERM_100K_PULLUP: Returns temperature in millidegC using
+ *	lookup table. The hardware applies offset/slope to adc code.
+ * SCALE_HW_CALIB_XOTHERM: Returns XO thermistor voltage in millidegC using
+ *	100k pullup. The hardware applies offset/slope to adc code.
+ * SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade.
+ *	The hardware applies offset/slope to adc code.
+ * SCALE_HW_CALIB_PM5_CHG_TEMP: Returns result in millidegrees for PMIC5
+ *	charger temperature.
+ * SCALE_HW_CALIB_PM5_SMB_TEMP: Returns result in millidegrees for PMIC5
+ *	SMB1390 temperature.
  */
 enum vadc_scale_fn_type {
 	SCALE_DEFAULT = 0,
@@ -96,6 +124,22 @@ enum vadc_scale_fn_type {
 	SCALE_PMIC_THERM,
 	SCALE_XOTHERM,
 	SCALE_PMI_CHG_TEMP,
+	SCALE_HW_CALIB_DEFAULT,
+	SCALE_HW_CALIB_THERM_100K_PULLUP,
+	SCALE_HW_CALIB_XOTHERM,
+	SCALE_HW_CALIB_PMIC_THERM,
+	SCALE_HW_CALIB_PM5_CHG_TEMP,
+	SCALE_HW_CALIB_PM5_SMB_TEMP,
+	SCALE_HW_CALIB_INVALID,
+};
+
+struct adc5_data {
+	const u32	full_scale_code_volt;
+	const u32	full_scale_code_cur;
+	const struct adc5_channels *adc_chans;
+	unsigned int	*decimation;
+	unsigned int	*hw_settle_1;
+	unsigned int	*hw_settle_2;
 };
 
 int qcom_vadc_scale(enum vadc_scale_fn_type scaletype,
@@ -104,6 +148,16 @@ int qcom_vadc_scale(enum vadc_scale_fn_type scaletype,
 		    bool absolute,
 		    u16 adc_code, int *result_mdec);
 
+struct qcom_adc5_scale_type {
+	int (*scale_fn)(const struct vadc_prescale_ratio *prescale,
+		const struct adc5_data *data, u16 adc_code, int *result);
+};
+
+int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype,
+		    const struct vadc_prescale_ratio *prescale,
+		    const struct adc5_data *data,
+		    u16 adc_code, int *result_mdec);
+
 int qcom_vadc_decimation_from_dt(u32 value);
 
 #endif /* QCOM_VADC_COMMON_H */

drivers/iio/adc/rcar-gyroadc.c

@@ -343,8 +343,8 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev)
 	for_each_child_of_node(np, child) {
 		of_id = of_match_node(rcar_gyroadc_child_match, child);
 		if (!of_id) {
-			dev_err(dev, "Ignoring unsupported ADC \"%s\".",
-				child->name);
+			dev_err(dev, "Ignoring unsupported ADC \"%pOFn\".",
+				child);
 			continue;
 		}
 
@@ -381,16 +381,16 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev)
 			ret = of_property_read_u32(child, "reg", &reg);
 			if (ret) {
 				dev_err(dev,
-					"Failed to get child reg property of ADC \"%s\".\n",
-					child->name);
+					"Failed to get child reg property of ADC \"%pOFn\".\n",
+					child);
 				return ret;
 			}
 
 			/* Channel number is too high. */
 			if (reg >= num_channels) {
 				dev_err(dev,
-					"Only %i channels supported with %s, but reg = <%i>.\n",
-					num_channels, child->name, reg);
+					"Only %i channels supported with %pOFn, but reg = <%i>.\n",
+					num_channels, child, reg);
 				return ret;
 			}
 		}

drivers/iio/adc/sc27xx_adc.c

@@ -5,10 +5,12 @@
 #include <linux/iio/iio.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
+#include <linux/nvmem-consumer.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
+#include <linux/slab.h>
 
 /* PMIC global registers definition */
 #define SC27XX_MODULE_EN		0xc08
@@ -87,16 +89,73 @@ struct sc27xx_adc_linear_graph {
  * should use the small-scale graph, and if more than 1.2v, we should use the
  * big-scale graph.
  */
-static const struct sc27xx_adc_linear_graph big_scale_graph = {
+static struct sc27xx_adc_linear_graph big_scale_graph = {
 	4200, 3310,
 	3600, 2832,
 };
 
-static const struct sc27xx_adc_linear_graph small_scale_graph = {
+static struct sc27xx_adc_linear_graph small_scale_graph = {
 	1000, 3413,
 	100, 341,
 };
 
+static const struct sc27xx_adc_linear_graph big_scale_graph_calib = {
+	4200, 856,
+	3600, 733,
+};
+
+static const struct sc27xx_adc_linear_graph small_scale_graph_calib = {
+	1000, 833,
+	100, 80,
+};
+
+static int sc27xx_adc_get_calib_data(u32 calib_data, int calib_adc)
+{
+	return ((calib_data & 0xff) + calib_adc - 128) * 4;
+}
+
+static int sc27xx_adc_scale_calibration(struct sc27xx_adc_data *data,
+					bool big_scale)
+{
+	const struct sc27xx_adc_linear_graph *calib_graph;
+	struct sc27xx_adc_linear_graph *graph;
+	struct nvmem_cell *cell;
+	const char *cell_name;
+	u32 calib_data = 0;
+	void *buf;
+	size_t len;
+
+	if (big_scale) {
+		calib_graph = &big_scale_graph_calib;
+		graph = &big_scale_graph;
+		cell_name = "big_scale_calib";
+	} else {
+		calib_graph = &small_scale_graph_calib;
+		graph = &small_scale_graph;
+		cell_name = "small_scale_calib";
+	}
+
+	cell = nvmem_cell_get(data->dev, cell_name);
+	if (IS_ERR(cell))
+		return PTR_ERR(cell);
+
+	buf = nvmem_cell_read(cell, &len);
+	nvmem_cell_put(cell);
+
+	if (IS_ERR(buf))
+		return PTR_ERR(buf);
+
+	memcpy(&calib_data, buf, min(len, sizeof(u32)));
+
+	/* Only need to calibrate the adc values in the linear graph. */
+	graph->adc0 = sc27xx_adc_get_calib_data(calib_data, calib_graph->adc0);
+	graph->adc1 = sc27xx_adc_get_calib_data(calib_data >> 8,
+						calib_graph->adc1);
+
+	kfree(buf);
+	return 0;
+}
+
 static int sc27xx_adc_get_ratio(int channel, int scale)
 {
 	switch (channel) {
@@ -209,7 +268,7 @@ static void sc27xx_adc_volt_ratio(struct sc27xx_adc_data *data,
 	*div_denominator = ratio & SC27XX_RATIO_DENOMINATOR_MASK;
 }
 
-static int sc27xx_adc_to_volt(const struct sc27xx_adc_linear_graph *graph,
+static int sc27xx_adc_to_volt(struct sc27xx_adc_linear_graph *graph,
 			      int raw_adc)
 {
 	int tmp;
@@ -273,6 +332,17 @@ static int sc27xx_adc_read_raw(struct iio_dev *indio_dev,
 	int ret, tmp;
 
 	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		mutex_lock(&indio_dev->mlock);
+		ret = sc27xx_adc_read(data, chan->channel, scale, &tmp);
+		mutex_unlock(&indio_dev->mlock);
+
+		if (ret)
+			return ret;
+
+		*val = tmp;
+		return IIO_VAL_INT;
+
 	case IIO_CHAN_INFO_PROCESSED:
 		mutex_lock(&indio_dev->mlock);
 		ret = sc27xx_adc_read_processed(data, chan->channel, scale,
@@ -315,48 +385,47 @@ static const struct iio_info sc27xx_info = {
 	.write_raw = &sc27xx_adc_write_raw,
 };
 
-#define SC27XX_ADC_CHANNEL(index) {				\
+#define SC27XX_ADC_CHANNEL(index, mask) {			\
 	.type = IIO_VOLTAGE,					\
 	.channel = index,					\
-	.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |	\
-			      BIT(IIO_CHAN_INFO_SCALE),		\
+	.info_mask_separate = mask | BIT(IIO_CHAN_INFO_SCALE),	\
 	.datasheet_name = "CH##index",				\
 	.indexed = 1,						\
 }
 
 static const struct iio_chan_spec sc27xx_channels[] = {
-	SC27XX_ADC_CHANNEL(0),
-	SC27XX_ADC_CHANNEL(1),
-	SC27XX_ADC_CHANNEL(2),
-	SC27XX_ADC_CHANNEL(3),
-	SC27XX_ADC_CHANNEL(4),
-	SC27XX_ADC_CHANNEL(5),
-	SC27XX_ADC_CHANNEL(6),
-	SC27XX_ADC_CHANNEL(7),
-	SC27XX_ADC_CHANNEL(8),
-	SC27XX_ADC_CHANNEL(9),
-	SC27XX_ADC_CHANNEL(10),
-	SC27XX_ADC_CHANNEL(11),
-	SC27XX_ADC_CHANNEL(12),
-	SC27XX_ADC_CHANNEL(13),
-	SC27XX_ADC_CHANNEL(14),
-	SC27XX_ADC_CHANNEL(15),
-	SC27XX_ADC_CHANNEL(16),
-	SC27XX_ADC_CHANNEL(17),
-	SC27XX_ADC_CHANNEL(18),
-	SC27XX_ADC_CHANNEL(19),
-	SC27XX_ADC_CHANNEL(20),
-	SC27XX_ADC_CHANNEL(21),
-	SC27XX_ADC_CHANNEL(22),
-	SC27XX_ADC_CHANNEL(23),
-	SC27XX_ADC_CHANNEL(24),
-	SC27XX_ADC_CHANNEL(25),
-	SC27XX_ADC_CHANNEL(26),
-	SC27XX_ADC_CHANNEL(27),
-	SC27XX_ADC_CHANNEL(28),
-	SC27XX_ADC_CHANNEL(29),
-	SC27XX_ADC_CHANNEL(30),
-	SC27XX_ADC_CHANNEL(31),
+	SC27XX_ADC_CHANNEL(0, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(1, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(2, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(3, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(4, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(5, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(6, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(7, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(8, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(9, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(10, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(11, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(12, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(13, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(14, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(15, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(16, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(17, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(18, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(19, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(20, BIT(IIO_CHAN_INFO_RAW)),
+	SC27XX_ADC_CHANNEL(21, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(22, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(23, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(24, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(25, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(26, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(27, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(28, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(29, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(30, BIT(IIO_CHAN_INFO_PROCESSED)),
+	SC27XX_ADC_CHANNEL(31, BIT(IIO_CHAN_INFO_PROCESSED)),
 };
 
 static int sc27xx_adc_enable(struct sc27xx_adc_data *data)
@@ -380,6 +449,15 @@ static int sc27xx_adc_enable(struct sc27xx_adc_data *data)
 	if (ret)
 		goto disable_clk;
 
+	/* ADC channel scales' calibration from nvmem device */
+	ret = sc27xx_adc_scale_calibration(data, true);
+	if (ret)
+		goto disable_clk;
+
+	ret = sc27xx_adc_scale_calibration(data, false);
+	if (ret)
+		goto disable_clk;
+
 	return 0;
 
 disable_clk:

drivers/iio/adc/ti-ads7950.c

@@ -51,7 +51,7 @@
 
 struct ti_ads7950_state {
 	struct spi_device	*spi;
-	struct spi_transfer	ring_xfer[TI_ADS7950_MAX_CHAN + 2];
+	struct spi_transfer	ring_xfer;
 	struct spi_transfer	scan_single_xfer[3];
 	struct spi_message	ring_msg;
 	struct spi_message	scan_single_msg;
@@ -65,11 +65,11 @@ struct ti_ads7950_state {
 	 * DMA (thus cache coherency maintenance) requires the
 	 * transfer buffers to live in their own cache lines.
 	 */
-	__be16	rx_buf[TI_ADS7950_MAX_CHAN + TI_ADS7950_TIMESTAMP_SIZE]
+	u16 rx_buf[TI_ADS7950_MAX_CHAN + 2 + TI_ADS7950_TIMESTAMP_SIZE]
 							____cacheline_aligned;
-	__be16	tx_buf[TI_ADS7950_MAX_CHAN];
-	__be16			single_tx;
-	__be16			single_rx;
+	u16 tx_buf[TI_ADS7950_MAX_CHAN + 2];
+	u16 single_tx;
+	u16 single_rx;
 
 };
 
@@ -108,7 +108,7 @@ enum ti_ads7950_id {
 		.realbits = bits,				\
 		.storagebits = 16,				\
 		.shift = 12 - (bits),				\
-		.endianness = IIO_BE,				\
+		.endianness = IIO_CPU,				\
 	},							\
 }
 
@@ -249,23 +249,14 @@ static int ti_ads7950_update_scan_mode(struct iio_dev *indio_dev,
 	len = 0;
 	for_each_set_bit(i, active_scan_mask, indio_dev->num_channels) {
 		cmd = TI_ADS7950_CR_WRITE | TI_ADS7950_CR_CHAN(i) | st->settings;
-		st->tx_buf[len++] = cpu_to_be16(cmd);
+		st->tx_buf[len++] = cmd;
 	}
 
 	/* Data for the 1st channel is not returned until the 3rd transfer */
-	len += 2;
-	for (i = 0; i < len; i++) {
-		if ((i + 2) < len)
-			st->ring_xfer[i].tx_buf = &st->tx_buf[i];
-		if (i >= 2)
-			st->ring_xfer[i].rx_buf = &st->rx_buf[i - 2];
-		st->ring_xfer[i].len = 2;
-		st->ring_xfer[i].cs_change = 1;
-	}
-	/* make sure last transfer's cs_change is not set */
-	st->ring_xfer[len - 1].cs_change = 0;
+	st->tx_buf[len++] = 0;
+	st->tx_buf[len++] = 0;
 
-	spi_message_init_with_transfers(&st->ring_msg, st->ring_xfer, len);
+	st->ring_xfer.len = len * 2;
 
 	return 0;
 }
@@ -281,7 +272,7 @@ static irqreturn_t ti_ads7950_trigger_handler(int irq, void *p)
 	if (ret < 0)
 		goto out;
 
-	iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf,
+	iio_push_to_buffers_with_timestamp(indio_dev, &st->rx_buf[2],
 					   iio_get_time_ns(indio_dev));
 
 out:
@@ -298,13 +289,13 @@ static int ti_ads7950_scan_direct(struct iio_dev *indio_dev, unsigned int ch)
 	mutex_lock(&indio_dev->mlock);
 
 	cmd = TI_ADS7950_CR_WRITE | TI_ADS7950_CR_CHAN(ch) | st->settings;
-	st->single_tx = cpu_to_be16(cmd);
+	st->single_tx = cmd;
 
 	ret = spi_sync(st->spi, &st->scan_single_msg);
 	if (ret)
 		goto out;
 
-	ret = be16_to_cpu(st->single_rx);
+	ret = st->single_rx;
 
 out:
 	mutex_unlock(&indio_dev->mlock);
@@ -378,6 +369,14 @@ static int ti_ads7950_probe(struct spi_device *spi)
 	const struct ti_ads7950_chip_info *info;
 	int ret;
 
+	spi->bits_per_word = 16;
+	spi->mode |= SPI_CS_WORD;
+	ret = spi_setup(spi);
+	if (ret < 0) {
+		dev_err(&spi->dev, "Error in spi setup\n");
+		return ret;
+	}
+
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
 	if (!indio_dev)
 		return -ENOMEM;
@@ -398,6 +397,16 @@ static int ti_ads7950_probe(struct spi_device *spi)
 	indio_dev->num_channels = info->num_channels;
 	indio_dev->info = &ti_ads7950_info;
 
+	/* build spi ring message */
+	spi_message_init(&st->ring_msg);
+
+	st->ring_xfer.tx_buf = &st->tx_buf[0];
+	st->ring_xfer.rx_buf = &st->rx_buf[0];
+	/* len will be set later */
+	st->ring_xfer.cs_change = true;
+
+	spi_message_add_tail(&st->ring_xfer, &st->ring_msg);
+
 	/*
 	 * Setup default message. The sample is read at the end of the first
 	 * transfer, then it takes one full cycle to convert the sample and one

drivers/iio/amplifiers/ad8366.c

@@ -209,6 +209,6 @@ static struct spi_driver ad8366_driver = {
 
 module_spi_driver(ad8366_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("Analog Devices AD8366 VGA");
 MODULE_LICENSE("GPL v2");

drivers/iio/chemical/bme680.h

@@ -4,10 +4,10 @@
 
 #define BME680_REG_CHIP_I2C_ID			0xD0
 #define BME680_REG_CHIP_SPI_ID			0x50
-#define BME680_CHIP_ID_VAL			0x61
+#define   BME680_CHIP_ID_VAL			0x61
 #define BME680_REG_SOFT_RESET_I2C		0xE0
 #define BME680_REG_SOFT_RESET_SPI		0x60
-#define BME680_CMD_SOFTRESET			0xB6
+#define   BME680_CMD_SOFTRESET			0xB6
 #define BME680_REG_STATUS			0x73
 #define   BME680_SPI_MEM_PAGE_BIT		BIT(4)
 #define     BME680_SPI_MEM_PAGE_1_VAL		1
@@ -18,6 +18,7 @@
 #define BME680_REG_GAS_MSB			0x2A
 #define BME680_REG_GAS_R_LSB			0x2B
 #define   BME680_GAS_STAB_BIT			BIT(4)
+#define   BME680_GAS_RANGE_MASK			GENMASK(3, 0)
 
 #define BME680_REG_CTRL_HUMIDITY		0x72
 #define   BME680_OSRS_HUMIDITY_MASK		GENMASK(2, 0)
@@ -26,9 +27,8 @@
 #define   BME680_OSRS_TEMP_MASK			GENMASK(7, 5)
 #define   BME680_OSRS_PRESS_MASK		GENMASK(4, 2)
 #define   BME680_MODE_MASK			GENMASK(1, 0)
-
-#define BME680_MODE_FORCED			1
-#define BME680_MODE_SLEEP			0
+#define     BME680_MODE_FORCED			1
+#define     BME680_MODE_SLEEP			0
 
 #define BME680_REG_CONFIG			0x75
 #define   BME680_FILTER_MASK			GENMASK(4, 2)
@@ -39,24 +39,21 @@
 
 #define BME680_MAX_OVERFLOW_VAL			0x40000000
 #define BME680_HUM_REG_SHIFT_VAL		4
-#define BME680_BIT_H1_DATA_MSK			0x0F
+#define BME680_BIT_H1_DATA_MASK			GENMASK(3, 0)
 
 #define BME680_REG_RES_HEAT_RANGE		0x02
-#define BME680_RHRANGE_MSK			0x30
+#define   BME680_RHRANGE_MASK			GENMASK(5, 4)
 #define BME680_REG_RES_HEAT_VAL			0x00
 #define BME680_REG_RANGE_SW_ERR			0x04
-#define BME680_RSERROR_MSK			0xF0
+#define   BME680_RSERROR_MASK			GENMASK(7, 4)
 #define BME680_REG_RES_HEAT_0			0x5A
 #define BME680_REG_GAS_WAIT_0			0x64
-#define BME680_GAS_RANGE_MASK			0x0F
 #define BME680_ADC_GAS_RES_SHIFT		6
 #define BME680_AMB_TEMP				25
 
 #define BME680_REG_CTRL_GAS_1			0x71
 #define   BME680_RUN_GAS_MASK			BIT(4)
 #define   BME680_NB_CONV_MASK			GENMASK(3, 0)
-#define     BME680_RUN_GAS_EN_BIT		BIT(4)
-#define     BME680_NB_CONV_0_VAL		0
 
 #define BME680_REG_MEAS_STAT_0			0x1D
 #define   BME680_GAS_MEAS_BIT			BIT(6)

drivers/iio/chemical/bme680_core.c

@@ -91,8 +91,6 @@ static const struct iio_chan_spec bme680_channels[] = {
 	},
 };
 
-static const int bme680_oversampling_avail[] = { 1, 2, 4, 8, 16 };
-
 static int bme680_read_calib(struct bme680_data *data,
 			     struct bme680_calib *calib)
 {
@@ -102,16 +100,14 @@ static int bme680_read_calib(struct bme680_data *data,
 	__le16 buf;
 
 	/* Temperature related coefficients */
-	ret = regmap_bulk_read(data->regmap, BME680_T1_LSB_REG,
-			       (u8 *) &buf, 2);
+	ret = regmap_bulk_read(data->regmap, BME680_T1_LSB_REG, (u8 *) &buf, 2);
 	if (ret < 0) {
 		dev_err(dev, "failed to read BME680_T1_LSB_REG\n");
 		return ret;
 	}
 	calib->par_t1 = le16_to_cpu(buf);
 
-	ret = regmap_bulk_read(data->regmap, BME680_T2_LSB_REG,
-			       (u8 *) &buf, 2);
+	ret = regmap_bulk_read(data->regmap, BME680_T2_LSB_REG, (u8 *) &buf, 2);
 	if (ret < 0) {
 		dev_err(dev, "failed to read BME680_T2_LSB_REG\n");
 		return ret;
@@ -126,16 +122,14 @@ static int bme680_read_calib(struct bme680_data *data,
 	calib->par_t3 = tmp;
 
 	/* Pressure related coefficients */
-	ret = regmap_bulk_read(data->regmap, BME680_P1_LSB_REG,
-			       (u8 *) &buf, 2);
+	ret = regmap_bulk_read(data->regmap, BME680_P1_LSB_REG, (u8 *) &buf, 2);
 	if (ret < 0) {
 		dev_err(dev, "failed to read BME680_P1_LSB_REG\n");
 		return ret;
 	}
 	calib->par_p1 = le16_to_cpu(buf);
 
-	ret = regmap_bulk_read(data->regmap, BME680_P2_LSB_REG,
-			       (u8 *) &buf, 2);
+	ret = regmap_bulk_read(data->regmap, BME680_P2_LSB_REG, (u8 *) &buf, 2);
 	if (ret < 0) {
 		dev_err(dev, "failed to read BME680_P2_LSB_REG\n");
 		return ret;
@@ -149,16 +143,14 @@ static int bme680_read_calib(struct bme680_data *data,
 	}
 	calib->par_p3 = tmp;
 
-	ret = regmap_bulk_read(data->regmap, BME680_P4_LSB_REG,
-			       (u8 *) &buf, 2);
+	ret = regmap_bulk_read(data->regmap, BME680_P4_LSB_REG, (u8 *) &buf, 2);
 	if (ret < 0) {
 		dev_err(dev, "failed to read BME680_P4_LSB_REG\n");
 		return ret;
 	}
 	calib->par_p4 = le16_to_cpu(buf);
 
-	ret = regmap_bulk_read(data->regmap, BME680_P5_LSB_REG,
-			       (u8 *) &buf, 2);
+	ret = regmap_bulk_read(data->regmap, BME680_P5_LSB_REG, (u8 *) &buf, 2);
 	if (ret < 0) {
 		dev_err(dev, "failed to read BME680_P5_LSB_REG\n");
 		return ret;
@@ -179,16 +171,14 @@ static int bme680_read_calib(struct bme680_data *data,
 	}
 	calib->par_p7 = tmp;
 
-	ret = regmap_bulk_read(data->regmap, BME680_P8_LSB_REG,
-			       (u8 *) &buf, 2);
+	ret = regmap_bulk_read(data->regmap, BME680_P8_LSB_REG, (u8 *) &buf, 2);
 	if (ret < 0) {
 		dev_err(dev, "failed to read BME680_P8_LSB_REG\n");
 		return ret;
 	}
 	calib->par_p8 = le16_to_cpu(buf);
 
-	ret = regmap_bulk_read(data->regmap, BME680_P9_LSB_REG,
-			       (u8 *) &buf, 2);
+	ret = regmap_bulk_read(data->regmap, BME680_P9_LSB_REG, (u8 *) &buf, 2);
 	if (ret < 0) {
 		dev_err(dev, "failed to read BME680_P9_LSB_REG\n");
 		return ret;
@@ -208,30 +198,26 @@ static int bme680_read_calib(struct bme680_data *data,
 		dev_err(dev, "failed to read BME680_H1_MSB_REG\n");
 		return ret;
 	}
-
 	ret = regmap_read(data->regmap, BME680_H1_LSB_REG, &tmp_lsb);
 	if (ret < 0) {
 		dev_err(dev, "failed to read BME680_H1_LSB_REG\n");
 		return ret;
 	}
-
 	calib->par_h1 = (tmp_msb << BME680_HUM_REG_SHIFT_VAL) |
-				(tmp_lsb & BME680_BIT_H1_DATA_MSK);
+			(tmp_lsb & BME680_BIT_H1_DATA_MASK);
 
 	ret = regmap_read(data->regmap, BME680_H2_MSB_REG, &tmp_msb);
 	if (ret < 0) {
 		dev_err(dev, "failed to read BME680_H2_MSB_REG\n");
 		return ret;
 	}
-
 	ret = regmap_read(data->regmap, BME680_H2_LSB_REG, &tmp_lsb);
 	if (ret < 0) {
 		dev_err(dev, "failed to read BME680_H2_LSB_REG\n");
 		return ret;
 	}
-
 	calib->par_h2 = (tmp_msb << BME680_HUM_REG_SHIFT_VAL) |
-				(tmp_lsb >> BME680_HUM_REG_SHIFT_VAL);
+			(tmp_lsb >> BME680_HUM_REG_SHIFT_VAL);
 
 	ret = regmap_read(data->regmap, BME680_H3_REG, &tmp);
 	if (ret < 0) {
@@ -276,8 +262,8 @@ static int bme680_read_calib(struct bme680_data *data,
 	}
 	calib->par_gh1 = tmp;
 
-	ret = regmap_bulk_read(data->regmap, BME680_GH2_LSB_REG,
-			       (u8 *) &buf, 2);
+	ret = regmap_bulk_read(data->regmap, BME680_GH2_LSB_REG, (u8 *) &buf,
+			       2);
 	if (ret < 0) {
 		dev_err(dev, "failed to read BME680_GH2_LSB_REG\n");
 		return ret;
@@ -297,7 +283,7 @@ static int bme680_read_calib(struct bme680_data *data,
 		dev_err(dev, "failed to read resistance heat range\n");
 		return ret;
 	}
-	calib->res_heat_range = (tmp & BME680_RHRANGE_MSK) / 16;
+	calib->res_heat_range = FIELD_GET(BME680_RHRANGE_MASK, tmp);
 
 	ret = regmap_read(data->regmap, BME680_REG_RES_HEAT_VAL, &tmp);
 	if (ret < 0) {
@@ -311,7 +297,7 @@ static int bme680_read_calib(struct bme680_data *data,
 		dev_err(dev, "failed to read range software error\n");
 		return ret;
 	}
-	calib->range_sw_err = (tmp & BME680_RSERROR_MSK) / 16;
+	calib->range_sw_err = FIELD_GET(BME680_RSERROR_MASK, tmp);
 
 	return 0;
 }
@@ -408,10 +394,7 @@ static u32 bme680_compensate_humid(struct bme680_data *data,
 	var6 = (var4 * var5) >> 1;
 	calc_hum = (((var3 + var6) >> 10) * 1000) >> 12;
 
-	if (calc_hum > 100000) /* Cap at 100%rH */
-		calc_hum = 100000;
-	else if (calc_hum < 0)
-		calc_hum = 0;
+	calc_hum = clamp(calc_hum, 0, 100000); /* clamp between 0-100 %rH */
 
 	return calc_hum;
 }
@@ -518,12 +501,20 @@ static int bme680_set_mode(struct bme680_data *data, bool mode)
 	return ret;
 }
 
+static u8 bme680_oversampling_to_reg(u8 val)
+{
+	return ilog2(val) + 1;
+}
+
 static int bme680_chip_config(struct bme680_data *data)
 {
 	struct device *dev = regmap_get_device(data->regmap);
 	int ret;
-	u8 osrs = FIELD_PREP(BME680_OSRS_HUMIDITY_MASK,
-			     data->oversampling_humid + 1);
+	u8 osrs;
+
+	osrs = FIELD_PREP(
+		BME680_OSRS_HUMIDITY_MASK,
+		bme680_oversampling_to_reg(data->oversampling_humid));
 	/*
 	 * Highly recommended to set oversampling of humidity before
 	 * temperature/pressure oversampling.
@@ -544,12 +535,12 @@ static int bme680_chip_config(struct bme680_data *data)
 		return ret;
 	}
 
-	osrs = FIELD_PREP(BME680_OSRS_TEMP_MASK, data->oversampling_temp + 1) |
-	       FIELD_PREP(BME680_OSRS_PRESS_MASK, data->oversampling_press + 1);
-
+	osrs = FIELD_PREP(BME680_OSRS_TEMP_MASK,
+			  bme680_oversampling_to_reg(data->oversampling_temp)) |
+	       FIELD_PREP(BME680_OSRS_PRESS_MASK,
+			  bme680_oversampling_to_reg(data->oversampling_press));
 	ret = regmap_write_bits(data->regmap, BME680_REG_CTRL_MEAS,
-				BME680_OSRS_TEMP_MASK |
-				BME680_OSRS_PRESS_MASK,
+				BME680_OSRS_TEMP_MASK | BME680_OSRS_PRESS_MASK,
 				osrs);
 	if (ret < 0)
 		dev_err(dev, "failed to write ctrl_meas register\n");
@@ -577,14 +568,15 @@ static int bme680_gas_config(struct bme680_data *data)
 	/* set target heating duration */
 	ret = regmap_write(data->regmap, BME680_REG_GAS_WAIT_0, heatr_dur);
 	if (ret < 0) {
-		dev_err(dev, "failted to write gas_wait_0 register\n");
+		dev_err(dev, "failed to write gas_wait_0 register\n");
 		return ret;
 	}
 
-	/* Selecting the runGas and NB conversion settings for the sensor */
+	/* Enable the gas sensor and select heater profile set-point 0 */
 	ret = regmap_update_bits(data->regmap, BME680_REG_CTRL_GAS_1,
 				 BME680_RUN_GAS_MASK | BME680_NB_CONV_MASK,
-				 BME680_RUN_GAS_EN_BIT | BME680_NB_CONV_0_VAL);
+				 FIELD_PREP(BME680_RUN_GAS_MASK, 1) |
+				 FIELD_PREP(BME680_NB_CONV_MASK, 0));
 	if (ret < 0)
 		dev_err(dev, "failed to write ctrl_gas_1 register\n");
 
@@ -782,13 +774,13 @@ static int bme680_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
 		switch (chan->type) {
 		case IIO_TEMP:
-			*val = 1 << data->oversampling_temp;
+			*val = data->oversampling_temp;
 			return IIO_VAL_INT;
 		case IIO_PRESSURE:
-			*val = 1 << data->oversampling_press;
+			*val = data->oversampling_press;
 			return IIO_VAL_INT;
 		case IIO_HUMIDITYRELATIVE:
-			*val = 1 << data->oversampling_humid;
+			*val = data->oversampling_humid;
 			return IIO_VAL_INT;
 		default:
 			return -EINVAL;
@@ -798,52 +790,9 @@ static int bme680_read_raw(struct iio_dev *indio_dev,
 	}
 }
 
-static int bme680_write_oversampling_ratio_temp(struct bme680_data *data,
-						int val)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(bme680_oversampling_avail); i++) {
-		if (bme680_oversampling_avail[i] == val) {
-			data->oversampling_temp = ilog2(val);
-
-			return bme680_chip_config(data);
-		}
-	}
-
-	return -EINVAL;
-}
-
-static int bme680_write_oversampling_ratio_press(struct bme680_data *data,
-						 int val)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(bme680_oversampling_avail); i++) {
-		if (bme680_oversampling_avail[i] == val) {
-			data->oversampling_press = ilog2(val);
-
-			return bme680_chip_config(data);
-		}
-	}
-
-	return -EINVAL;
-}
-
-static int bme680_write_oversampling_ratio_humid(struct bme680_data *data,
-						 int val)
+static bool bme680_is_valid_oversampling(int rate)
 {
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(bme680_oversampling_avail); i++) {
-		if (bme680_oversampling_avail[i] == val) {
-			data->oversampling_humid = ilog2(val);
-
-			return bme680_chip_config(data);
-		}
-	}
-
-	return -EINVAL;
+	return (rate > 0 && rate <= 16 && is_power_of_2(rate));
 }
 
 static int bme680_write_raw(struct iio_dev *indio_dev,
@@ -852,18 +801,31 @@ static int bme680_write_raw(struct iio_dev *indio_dev,
 {
 	struct bme680_data *data = iio_priv(indio_dev);
 
+	if (val2 != 0)
+		return -EINVAL;
+
 	switch (mask) {
 	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
+	{
+		if (!bme680_is_valid_oversampling(val))
+			return -EINVAL;
+
 		switch (chan->type) {
 		case IIO_TEMP:
-			return bme680_write_oversampling_ratio_temp(data, val);
+			data->oversampling_temp = val;
+			break;
 		case IIO_PRESSURE:
-			return bme680_write_oversampling_ratio_press(data, val);
+			data->oversampling_press = val;
+			break;
 		case IIO_HUMIDITYRELATIVE:
-			return bme680_write_oversampling_ratio_humid(data, val);
+			data->oversampling_humid = val;
+			break;
 		default:
 			return -EINVAL;
 		}
+
+		return bme680_chip_config(data);
+	}
 	default:
 		return -EINVAL;
 	}
@@ -925,9 +887,9 @@ int bme680_core_probe(struct device *dev, struct regmap *regmap,
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
 	/* default values for the sensor */
-	data->oversampling_humid = ilog2(2); /* 2X oversampling rate */
-	data->oversampling_press = ilog2(4); /* 4X oversampling rate */
-	data->oversampling_temp = ilog2(8);  /* 8X oversampling rate */
+	data->oversampling_humid = 2; /* 2X oversampling rate */
+	data->oversampling_press = 4; /* 4X oversampling rate */
+	data->oversampling_temp = 8;  /* 8X oversampling rate */
 	data->heater_temp = 320; /* degree Celsius */
 	data->heater_dur = 150;  /* milliseconds */
 

drivers/iio/dac/Kconfig

@@ -120,6 +120,16 @@ config AD5624R_SPI
 	  Say yes here to build support for Analog Devices AD5624R, AD5644R and
 	  AD5664R converters (DAC). This driver uses the common SPI interface.
 
+config LTC1660
+	tristate "Linear Technology LTC1660/LTC1665 DAC SPI driver"
+	depends on SPI
+	help
+	  Say yes here to build support for Linear Technology
+	  LTC1660 and LTC1665 Digital to Analog Converters.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ltc1660.
+
 config LTC2632
 	tristate "Linear Technology LTC2632-12/10/8 DAC spi driver"
 	depends on SPI

drivers/iio/dac/Makefile

@@ -29,6 +29,7 @@ obj-$(CONFIG_CIO_DAC) += cio-dac.o
 obj-$(CONFIG_DPOT_DAC) += dpot-dac.o
 obj-$(CONFIG_DS4424) += ds4424.o
 obj-$(CONFIG_LPC18XX_DAC) += lpc18xx_dac.o
+obj-$(CONFIG_LTC1660) += ltc1660.o
 obj-$(CONFIG_LTC2632) += ltc2632.o
 obj-$(CONFIG_M62332) += m62332.o
 obj-$(CONFIG_MAX517) += max517.o

drivers/iio/dac/ad5064.c

@@ -808,6 +808,40 @@ static int ad5064_set_config(struct ad5064_state *st, unsigned int val)
 	return ad5064_write(st, cmd, 0, val, 0);
 }
 
+static int ad5064_request_vref(struct ad5064_state *st, struct device *dev)
+{
+	unsigned int i;
+	int ret;
+
+	for (i = 0; i < ad5064_num_vref(st); ++i)
+		st->vref_reg[i].supply = ad5064_vref_name(st, i);
+
+	if (!st->chip_info->internal_vref)
+		return devm_regulator_bulk_get(dev, ad5064_num_vref(st),
+					       st->vref_reg);
+
+	/*
+	 * This assumes that when the regulator has an internal VREF
+	 * there is only one external VREF connection, which is
+	 * currently the case for all supported devices.
+	 */
+	st->vref_reg[0].consumer = devm_regulator_get_optional(dev, "vref");
+	if (!IS_ERR(st->vref_reg[0].consumer))
+		return 0;
+
+	ret = PTR_ERR(st->vref_reg[0].consumer);
+	if (ret != -ENODEV)
+		return ret;
+
+	/* If no external regulator was supplied use the internal VREF */
+	st->use_internal_vref = true;
+	ret = ad5064_set_config(st, AD5064_CONFIG_INT_VREF_ENABLE);
+	if (ret)
+		dev_err(dev, "Failed to enable internal vref: %d\n", ret);
+
+	return ret;
+}
+
 static int ad5064_probe(struct device *dev, enum ad5064_type type,
 			const char *name, ad5064_write_func write)
 {
@@ -828,22 +862,11 @@ static int ad5064_probe(struct device *dev, enum ad5064_type type,
 	st->dev = dev;
 	st->write = write;
 
-	for (i = 0; i < ad5064_num_vref(st); ++i)
-		st->vref_reg[i].supply = ad5064_vref_name(st, i);
+	ret = ad5064_request_vref(st, dev);
+	if (ret)
+		return ret;
 
-	ret = devm_regulator_bulk_get(dev, ad5064_num_vref(st),
-		st->vref_reg);
-	if (ret) {
-		if (!st->chip_info->internal_vref)
-			return ret;
-		st->use_internal_vref = true;
-		ret = ad5064_set_config(st, AD5064_CONFIG_INT_VREF_ENABLE);
-		if (ret) {
-			dev_err(dev, "Failed to enable internal vref: %d\n",
-				ret);
-			return ret;
-		}
-	} else {
+	if (!st->use_internal_vref) {
 		ret = regulator_bulk_enable(ad5064_num_vref(st), st->vref_reg);
 		if (ret)
 			return ret;

drivers/iio/dac/ad5446.c

@@ -628,6 +628,6 @@ static void __exit ad5446_exit(void)
 }
 module_exit(ad5446_exit);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("Analog Devices AD5444/AD5446 DAC");
 MODULE_LICENSE("GPL v2");

drivers/iio/dac/ad5504.c

@@ -369,6 +369,6 @@ static struct spi_driver ad5504_driver = {
 };
 module_spi_driver(ad5504_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("Analog Devices AD5501/AD5501 DAC");
 MODULE_LICENSE("GPL v2");

drivers/iio/dac/ad5686.c

@@ -470,6 +470,6 @@ int ad5686_remove(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(ad5686_remove);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("Analog Devices AD5686/85/84 DAC");
 MODULE_LICENSE("GPL v2");

drivers/iio/dac/ad5758.c

@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/property.h>
 #include <linux/spi/spi.h>
+#include <linux/gpio/consumer.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -108,6 +109,7 @@ struct ad5758_range {
 struct ad5758_state {
 	struct spi_device *spi;
 	struct mutex lock;
+	struct gpio_desc *gpio_reset;
 	struct ad5758_range out_range;
 	unsigned int dc_dc_mode;
 	unsigned int dc_dc_ilim;
@@ -474,6 +476,21 @@ static int ad5758_internal_buffers_en(struct ad5758_state *st, bool enable)
 					     AD5758_CAL_MEM_UNREFRESHED_MSK);
 }
 
+static int ad5758_reset(struct ad5758_state *st)
+{
+	if (st->gpio_reset) {
+		gpiod_set_value(st->gpio_reset, 0);
+		usleep_range(100, 1000);
+		gpiod_set_value(st->gpio_reset, 1);
+		usleep_range(100, 1000);
+
+		return 0;
+	} else {
+		/* Perform a software reset */
+		return ad5758_soft_reset(st);
+	}
+}
+
 static int ad5758_reg_access(struct iio_dev *indio_dev,
 			     unsigned int reg,
 			     unsigned int writeval,
@@ -768,13 +785,18 @@ static int ad5758_init(struct ad5758_state *st)
 {
 	int regval, ret;
 
+	st->gpio_reset = devm_gpiod_get_optional(&st->spi->dev, "reset",
+						 GPIOD_OUT_HIGH);
+	if (IS_ERR(st->gpio_reset))
+		return PTR_ERR(st->gpio_reset);
+
 	/* Disable CRC checks */
 	ret = ad5758_crc_disable(st);
 	if (ret < 0)
 		return ret;
 
-	/* Perform a software reset */
-	ret = ad5758_soft_reset(st);
+	/* Perform a reset */
+	ret = ad5758_reset(st);
 	if (ret < 0)
 		return ret;
 

drivers/iio/dac/ad5791.c

@@ -467,6 +467,6 @@ static struct spi_driver ad5791_driver = {
 };
 module_spi_driver(ad5791_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("Analog Devices AD5760/AD5780/AD5781/AD5790/AD5791 DAC");
 MODULE_LICENSE("GPL v2");

drivers/iio/dac/dpot-dac.c

@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * IIO DAC emulation driver using a digital potentiometer
  *
  * Copyright (C) 2016 Axentia Technologies AB
  *
  * Author: Peter Rosin <peda@axentia.se>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 /*

drivers/iio/dac/ltc1660.c

@@ -0,0 +1,250 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Linear Technology LTC1665/LTC1660, 8 channels DAC
+ *
+ * Copyright (C) 2018 Marcus Folkesson <marcus.folkesson@gmail.com>
+ */
+#include <linux/bitops.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#define LTC1660_REG_WAKE	0x0
+#define LTC1660_REG_DAC_A	0x1
+#define LTC1660_REG_DAC_B	0x2
+#define LTC1660_REG_DAC_C	0x3
+#define LTC1660_REG_DAC_D	0x4
+#define LTC1660_REG_DAC_E	0x5
+#define LTC1660_REG_DAC_F	0x6
+#define LTC1660_REG_DAC_G	0x7
+#define LTC1660_REG_DAC_H	0x8
+#define LTC1660_REG_SLEEP	0xe
+
+#define LTC1660_NUM_CHANNELS	8
+
+static const struct regmap_config ltc1660_regmap_config = {
+	.reg_bits = 4,
+	.val_bits = 12,
+};
+
+enum ltc1660_supported_device_ids {
+	ID_LTC1660,
+	ID_LTC1665,
+};
+
+struct ltc1660_priv {
+	struct spi_device *spi;
+	struct regmap *regmap;
+	struct regulator *vref_reg;
+	unsigned int value[LTC1660_NUM_CHANNELS];
+	unsigned int vref_mv;
+};
+
+static int ltc1660_read_raw(struct iio_dev *indio_dev,
+		struct iio_chan_spec const *chan,
+		int *val,
+		int *val2,
+		long mask)
+{
+	struct ltc1660_priv *priv = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		*val = priv->value[chan->channel];
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = regulator_get_voltage(priv->vref_reg);
+		if (*val < 0) {
+			dev_err(&priv->spi->dev, "failed to read vref regulator: %d\n",
+					*val);
+			return *val;
+		}
+
+		/* Convert to mV */
+		*val /= 1000;
+		*val2 = chan->scan_type.realbits;
+		return IIO_VAL_FRACTIONAL_LOG2;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ltc1660_write_raw(struct iio_dev *indio_dev,
+		struct iio_chan_spec const *chan,
+		int val,
+		int val2,
+		long mask)
+{
+	struct ltc1660_priv *priv = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		if (val2 != 0)
+			return -EINVAL;
+
+		if (val < 0 || val > GENMASK(chan->scan_type.realbits - 1, 0))
+			return -EINVAL;
+
+		ret = regmap_write(priv->regmap, chan->channel,
+					(val << chan->scan_type.shift));
+		if (!ret)
+			priv->value[chan->channel] = val;
+
+		return ret;
+	default:
+		return -EINVAL;
+	}
+}
+
+#define LTC1660_CHAN(chan, bits) {			\
+	.type = IIO_VOLTAGE,				\
+	.indexed = 1,					\
+	.output = 1,					\
+	.channel = chan,				\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+	.scan_type = {					\
+		.sign = 'u',				\
+		.realbits = (bits),			\
+		.storagebits = 16,			\
+		.shift = 12 - (bits),			\
+	},						\
+}
+
+#define  LTC1660_OCTAL_CHANNELS(bits) {			\
+		LTC1660_CHAN(LTC1660_REG_DAC_A, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_B, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_C, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_D, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_E, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_F, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_G, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_H, bits),	\
+}
+
+static const struct iio_chan_spec ltc1660_channels[][LTC1660_NUM_CHANNELS] = {
+	[ID_LTC1660] = LTC1660_OCTAL_CHANNELS(10),
+	[ID_LTC1665] = LTC1660_OCTAL_CHANNELS(8),
+};
+
+static const struct iio_info ltc1660_info = {
+	.read_raw = &ltc1660_read_raw,
+	.write_raw = &ltc1660_write_raw,
+};
+
+static int __maybe_unused ltc1660_suspend(struct device *dev)
+{
+	struct ltc1660_priv *priv = iio_priv(spi_get_drvdata(
+						to_spi_device(dev)));
+	return regmap_write(priv->regmap, LTC1660_REG_SLEEP, 0x00);
+}
+
+static int __maybe_unused ltc1660_resume(struct device *dev)
+{
+	struct ltc1660_priv *priv = iio_priv(spi_get_drvdata(
+						to_spi_device(dev)));
+	return regmap_write(priv->regmap, LTC1660_REG_WAKE, 0x00);
+}
+static SIMPLE_DEV_PM_OPS(ltc1660_pm_ops, ltc1660_suspend, ltc1660_resume);
+
+static int ltc1660_probe(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev;
+	struct ltc1660_priv *priv;
+	const struct spi_device_id *id = spi_get_device_id(spi);
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*priv));
+	if (indio_dev == NULL)
+		return -ENOMEM;
+
+	priv = iio_priv(indio_dev);
+	priv->regmap = devm_regmap_init_spi(spi, &ltc1660_regmap_config);
+	if (IS_ERR(priv->regmap)) {
+		dev_err(&spi->dev, "failed to register spi regmap %ld\n",
+			PTR_ERR(priv->regmap));
+		return PTR_ERR(priv->regmap);
+	}
+
+	priv->vref_reg = devm_regulator_get(&spi->dev, "vref");
+	if (IS_ERR(priv->vref_reg)) {
+		dev_err(&spi->dev, "vref regulator not specified\n");
+		return PTR_ERR(priv->vref_reg);
+	}
+
+	ret = regulator_enable(priv->vref_reg);
+	if (ret) {
+		dev_err(&spi->dev, "failed to enable vref regulator: %d\n",
+				ret);
+		return ret;
+	}
+
+	priv->spi = spi;
+	spi_set_drvdata(spi, indio_dev);
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->info = &ltc1660_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = ltc1660_channels[id->driver_data];
+	indio_dev->num_channels = LTC1660_NUM_CHANNELS;
+	indio_dev->name = id->name;
+
+	ret = iio_device_register(indio_dev);
+	if (ret) {
+		dev_err(&spi->dev, "failed to register iio device: %d\n",
+				ret);
+		goto error_disable_reg;
+	}
+
+	return 0;
+
+error_disable_reg:
+	regulator_disable(priv->vref_reg);
+
+	return ret;
+}
+
+static int ltc1660_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ltc1660_priv *priv = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+	regulator_disable(priv->vref_reg);
+
+	return 0;
+}
+
+static const struct of_device_id ltc1660_dt_ids[] = {
+	{ .compatible = "lltc,ltc1660", .data = (void *)ID_LTC1660 },
+	{ .compatible = "lltc,ltc1665", .data = (void *)ID_LTC1665 },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ltc1660_dt_ids);
+
+static const struct spi_device_id ltc1660_id[] = {
+	{"ltc1660", ID_LTC1660},
+	{"ltc1665", ID_LTC1665},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(spi, ltc1660_id);
+
+static struct spi_driver ltc1660_driver = {
+	.driver = {
+		.name = "ltc1660",
+		.of_match_table = ltc1660_dt_ids,
+		.pm = &ltc1660_pm_ops,
+	},
+	.probe	= ltc1660_probe,
+	.remove = ltc1660_remove,
+	.id_table = ltc1660_id,
+};
+module_spi_driver(ltc1660_driver);
+
+MODULE_AUTHOR("Marcus Folkesson <marcus.folkesson@gmail.com>");
+MODULE_DESCRIPTION("Linear Technology LTC1660/LTC1665 DAC");
+MODULE_LICENSE("GPL v2");

drivers/iio/dac/max517.c

@@ -113,15 +113,14 @@ static int max517_write_raw(struct iio_dev *indio_dev,
 	return ret;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int max517_suspend(struct device *dev)
+static int __maybe_unused max517_suspend(struct device *dev)
 {
 	u8 outbuf = COMMAND_PD;
 
 	return i2c_master_send(to_i2c_client(dev), &outbuf, 1);
 }
 
-static int max517_resume(struct device *dev)
+static int __maybe_unused max517_resume(struct device *dev)
 {
 	u8 outbuf = 0;
 
@@ -129,10 +128,6 @@ static int max517_resume(struct device *dev)
 }
 
 static SIMPLE_DEV_PM_OPS(max517_pm_ops, max517_suspend, max517_resume);
-#define MAX517_PM_OPS (&max517_pm_ops)
-#else
-#define MAX517_PM_OPS NULL
-#endif
 
 static const struct iio_info max517_info = {
 	.read_raw = max517_read_raw,
@@ -229,7 +224,7 @@ MODULE_DEVICE_TABLE(i2c, max517_id);
 static struct i2c_driver max517_driver = {
 	.driver = {
 		.name	= MAX517_DRV_NAME,
-		.pm		= MAX517_PM_OPS,
+		.pm	= &max517_pm_ops,
 	},
 	.probe		= max517_probe,
 	.remove		= max517_remove,

drivers/iio/dac/max5821.c

@@ -270,8 +270,7 @@ static int max5821_write_raw(struct iio_dev *indio_dev,
 	}
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int max5821_suspend(struct device *dev)
+static int __maybe_unused max5821_suspend(struct device *dev)
 {
 	u8 outbuf[2] = { MAX5821_EXTENDED_COMMAND_MODE,
 			 MAX5821_EXTENDED_DAC_A |
@@ -281,7 +280,7 @@ static int max5821_suspend(struct device *dev)
 	return i2c_master_send(to_i2c_client(dev), outbuf, 2);
 }
 
-static int max5821_resume(struct device *dev)
+static int __maybe_unused max5821_resume(struct device *dev)
 {
 	u8 outbuf[2] = { MAX5821_EXTENDED_COMMAND_MODE,
 			 MAX5821_EXTENDED_DAC_A |
@@ -292,10 +291,6 @@ static int max5821_resume(struct device *dev)
 }
 
 static SIMPLE_DEV_PM_OPS(max5821_pm_ops, max5821_suspend, max5821_resume);
-#define MAX5821_PM_OPS (&max5821_pm_ops)
-#else
-#define MAX5821_PM_OPS NULL
-#endif /* CONFIG_PM_SLEEP */
 
 static const struct iio_info max5821_info = {
 	.read_raw = max5821_read_raw,
@@ -392,7 +387,7 @@ static struct i2c_driver max5821_driver = {
 	.driver = {
 		.name	= "max5821",
 		.of_match_table = max5821_of_match,
-		.pm     = MAX5821_PM_OPS,
+		.pm     = &max5821_pm_ops,
 	},
 	.probe		= max5821_probe,
 	.remove		= max5821_remove,

drivers/iio/dac/mcp4725.c

@@ -45,7 +45,7 @@ struct mcp4725_data {
 	struct regulator *vref_reg;
 };
 
-static int mcp4725_suspend(struct device *dev)
+static int __maybe_unused mcp4725_suspend(struct device *dev)
 {
 	struct mcp4725_data *data = iio_priv(i2c_get_clientdata(
 		to_i2c_client(dev)));
@@ -58,7 +58,7 @@ static int mcp4725_suspend(struct device *dev)
 	return i2c_master_send(data->client, outbuf, 2);
 }
 
-static int mcp4725_resume(struct device *dev)
+static int __maybe_unused mcp4725_resume(struct device *dev)
 {
 	struct mcp4725_data *data = iio_priv(i2c_get_clientdata(
 		to_i2c_client(dev)));
@@ -71,13 +71,7 @@ static int mcp4725_resume(struct device *dev)
 
 	return i2c_master_send(data->client, outbuf, 2);
 }
-
-#ifdef CONFIG_PM_SLEEP
 static SIMPLE_DEV_PM_OPS(mcp4725_pm_ops, mcp4725_suspend, mcp4725_resume);
-#define MCP4725_PM_OPS (&mcp4725_pm_ops)
-#else
-#define MCP4725_PM_OPS NULL
-#endif
 
 static ssize_t mcp4725_store_eeprom(struct device *dev,
 	struct device_attribute *attr, const char *buf, size_t len)
@@ -547,7 +541,7 @@ static struct i2c_driver mcp4725_driver = {
 	.driver = {
 		.name	= MCP4725_DRV_NAME,
 		.of_match_table = of_match_ptr(mcp4725_of_match),
-		.pm	= MCP4725_PM_OPS,
+		.pm	= &mcp4725_pm_ops,
 	},
 	.probe		= mcp4725_probe,
 	.remove		= mcp4725_remove,

drivers/iio/dac/mcp4922.c

@@ -94,17 +94,22 @@ static int mcp4922_write_raw(struct iio_dev *indio_dev,
 		long mask)
 {
 	struct mcp4922_state *state = iio_priv(indio_dev);
+	int ret;
 
 	if (val2 != 0)
 		return -EINVAL;
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
-		if (val > GENMASK(chan->scan_type.realbits-1, 0))
+		if (val < 0 || val > GENMASK(chan->scan_type.realbits - 1, 0))
 			return -EINVAL;
 		val <<= chan->scan_type.shift;
-		state->value[chan->channel] = val;
-		return mcp4922_spi_write(state, chan->channel, val);
+
+		ret = mcp4922_spi_write(state, chan->channel, val);
+		if (!ret)
+			state->value[chan->channel] = val;
+		return ret;
+
 	default:
 		return -EINVAL;
 	}

drivers/iio/dac/ti-dac5571.c

@@ -421,6 +421,7 @@ MODULE_DEVICE_TABLE(i2c, dac5571_id);
 static struct i2c_driver dac5571_driver = {
 	.driver = {
 		   .name = "ti-dac5571",
+		   .of_match_table = of_match_ptr(dac5571_of_id),
 	},
 	.probe	  = dac5571_probe,
 	.remove   = dac5571_remove,

drivers/iio/frequency/ad9523.c

@@ -1078,6 +1078,6 @@ static struct spi_driver ad9523_driver = {
 };
 module_spi_driver(ad9523_driver);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("Analog Devices AD9523 CLOCKDIST/PLL");
 MODULE_LICENSE("GPL v2");

drivers/iio/frequency/adf4350.c

@@ -388,7 +388,7 @@ static struct adf4350_platform_data *adf4350_parse_dt(struct device *dev)
 	if (!pdata)
 		return NULL;
 
-	strncpy(&pdata->name[0], np->name, SPI_NAME_SIZE - 1);
+	snprintf(&pdata->name[0], SPI_NAME_SIZE - 1, "%pOFn", np);
 
 	tmp = 10000;
 	of_property_read_u32(np, "adi,channel-spacing", &tmp);

drivers/iio/health/max30102.c

@@ -282,9 +282,11 @@ static int max30102_read_measurement(struct max30102_data *data,
 	switch (measurements) {
 	case 3:
 		MAX30102_COPY_DATA(2);
-	case 2: /* fall-through */
+		/* fall through */
+	case 2:
 		MAX30102_COPY_DATA(1);
-	case 1: /* fall-through */
+		/* fall through */
+	case 1:
 		MAX30102_COPY_DATA(0);
 		break;
 	default:

drivers/iio/imu/inv_mpu6050/inv_mpu_core.c

@@ -23,6 +23,7 @@
 #include <linux/iio/iio.h>
 #include <linux/acpi.h>
 #include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
 #include "inv_mpu_iio.h"
 
 /*
@@ -926,6 +927,39 @@ error_power_off:
 	return result;
 }
 
+static int inv_mpu_core_enable_regulator(struct inv_mpu6050_state *st)
+{
+	int result;
+
+	result = regulator_enable(st->vddio_supply);
+	if (result) {
+		dev_err(regmap_get_device(st->map),
+			"Failed to enable regulator: %d\n", result);
+	} else {
+		/* Give the device a little bit of time to start up. */
+		usleep_range(35000, 70000);
+	}
+
+	return result;
+}
+
+static int inv_mpu_core_disable_regulator(struct inv_mpu6050_state *st)
+{
+	int result;
+
+	result = regulator_disable(st->vddio_supply);
+	if (result)
+		dev_err(regmap_get_device(st->map),
+			"Failed to disable regulator: %d\n", result);
+
+	return result;
+}
+
+static void inv_mpu_core_disable_regulator_action(void *_data)
+{
+	inv_mpu_core_disable_regulator(_data);
+}
+
 int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
 		int (*inv_mpu_bus_setup)(struct iio_dev *), int chip_type)
 {
@@ -992,6 +1026,28 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
 		return -EINVAL;
 	}
 
+	st->vddio_supply = devm_regulator_get(dev, "vddio");
+	if (IS_ERR(st->vddio_supply)) {
+		if (PTR_ERR(st->vddio_supply) != -EPROBE_DEFER)
+			dev_err(dev, "Failed to get vddio regulator %d\n",
+				(int)PTR_ERR(st->vddio_supply));
+
+		return PTR_ERR(st->vddio_supply);
+	}
+
+	result = inv_mpu_core_enable_regulator(st);
+	if (result)
+		return result;
+
+	result = devm_add_action(dev, inv_mpu_core_disable_regulator_action,
+				 st);
+	if (result) {
+		inv_mpu_core_disable_regulator_action(st);
+		dev_err(dev, "Failed to setup regulator cleanup action %d\n",
+			result);
+		return result;
+	}
+
 	/* power is turned on inside check chip type*/
 	result = inv_check_and_setup_chip(st);
 	if (result)
@@ -1051,7 +1107,12 @@ static int inv_mpu_resume(struct device *dev)
 	int result;
 
 	mutex_lock(&st->lock);
+	result = inv_mpu_core_enable_regulator(st);
+	if (result)
+		goto out_unlock;
+
 	result = inv_mpu6050_set_power_itg(st, true);
+out_unlock:
 	mutex_unlock(&st->lock);
 
 	return result;
@@ -1064,6 +1125,7 @@ static int inv_mpu_suspend(struct device *dev)
 
 	mutex_lock(&st->lock);
 	result = inv_mpu6050_set_power_itg(st, false);
+	inv_mpu_core_disable_regulator(st);
 	mutex_unlock(&st->lock);
 
 	return result;

drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h

@@ -129,6 +129,7 @@ struct inv_mpu6050_hw {
  *  @chip_period:	chip internal period estimation (~1kHz).
  *  @it_timestamp:	timestamp from previous interrupt.
  *  @data_timestamp:	timestamp for next data sample.
+ *  @vddio_supply	voltage regulator for the chip.
  */
 struct inv_mpu6050_state {
 	struct mutex lock;
@@ -149,6 +150,7 @@ struct inv_mpu6050_state {
 	s64 chip_period;
 	s64 it_timestamp;
 	s64 data_timestamp;
+	struct regulator *vddio_supply;
 };
 
 /*register and associated bit definition*/

drivers/iio/imu/st_lsm6dsx/Kconfig

@@ -9,7 +9,7 @@ config IIO_ST_LSM6DSX
 	help
 	  Say yes here to build support for STMicroelectronics LSM6DSx imu
 	  sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm,
-	  ism330dlc
+	  ism330dlc, lsm6dso
 
 	  To compile this driver as a module, choose M here: the module
 	  will be called st_lsm6dsx.

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h

@@ -19,6 +19,7 @@
 #define ST_LSM6DSL_DEV_NAME	"lsm6dsl"
 #define ST_LSM6DSM_DEV_NAME	"lsm6dsm"
 #define ST_ISM330DLC_DEV_NAME	"ism330dlc"
+#define ST_LSM6DSO_DEV_NAME	"lsm6dso"
 
 enum st_lsm6dsx_hw_id {
 	ST_LSM6DS3_ID,
@@ -26,14 +27,20 @@ enum st_lsm6dsx_hw_id {
 	ST_LSM6DSL_ID,
 	ST_LSM6DSM_ID,
 	ST_ISM330DLC_ID,
+	ST_LSM6DSO_ID,
 	ST_LSM6DSX_MAX_ID,
 };
 
-#define ST_LSM6DSX_BUFF_SIZE		400
+#define ST_LSM6DSX_BUFF_SIZE		512
 #define ST_LSM6DSX_CHAN_SIZE		2
 #define ST_LSM6DSX_SAMPLE_SIZE		6
+#define ST_LSM6DSX_TAG_SIZE		1
+#define ST_LSM6DSX_TAGGED_SAMPLE_SIZE	(ST_LSM6DSX_SAMPLE_SIZE + \
+					 ST_LSM6DSX_TAG_SIZE)
 #define ST_LSM6DSX_MAX_WORD_LEN		((32 / ST_LSM6DSX_SAMPLE_SIZE) * \
 					 ST_LSM6DSX_SAMPLE_SIZE)
+#define ST_LSM6DSX_MAX_TAGGED_WORD_LEN	((32 / ST_LSM6DSX_TAGGED_SAMPLE_SIZE) \
+					 * ST_LSM6DSX_TAGGED_SAMPLE_SIZE)
 #define ST_LSM6DSX_SHIFT_VAL(val, mask)	(((val) << __ffs(mask)) & (mask))
 
 struct st_lsm6dsx_reg {
@@ -41,13 +48,17 @@ struct st_lsm6dsx_reg {
 	u8 mask;
 };
 
+struct st_lsm6dsx_hw;
+
 /**
  * struct st_lsm6dsx_fifo_ops - ST IMU FIFO settings
+ * @read_fifo: Read FIFO callback.
  * @fifo_th: FIFO threshold register info (addr + mask).
  * @fifo_diff: FIFO diff status register info (addr + mask).
  * @th_wl: FIFO threshold word length.
  */
 struct st_lsm6dsx_fifo_ops {
+	int (*read_fifo)(struct st_lsm6dsx_hw *hw);
 	struct {
 		u8 addr;
 		u16 mask;
@@ -79,6 +90,7 @@ struct st_lsm6dsx_hw_ts_settings {
  * @max_fifo_size: Sensor max fifo length in FIFO words.
  * @id: List of hw id supported by the driver configuration.
  * @decimator: List of decimator register info (addr + mask).
+ * @batch: List of FIFO batching register info (addr + mask).
  * @fifo_ops: Sensor hw FIFO parameters.
  * @ts_settings: Hw timer related settings.
  */
@@ -87,6 +99,7 @@ struct st_lsm6dsx_settings {
 	u16 max_fifo_size;
 	enum st_lsm6dsx_hw_id id[ST_LSM6DSX_MAX_ID];
 	struct st_lsm6dsx_reg decimator[ST_LSM6DSX_MAX_ID];
+	struct st_lsm6dsx_reg batch[ST_LSM6DSX_MAX_ID];
 	struct st_lsm6dsx_fifo_ops fifo_ops;
 	struct st_lsm6dsx_hw_ts_settings ts_settings;
 };
@@ -175,5 +188,8 @@ int st_lsm6dsx_update_watermark(struct st_lsm6dsx_sensor *sensor,
 int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw);
 int st_lsm6dsx_set_fifo_mode(struct st_lsm6dsx_hw *hw,
 			     enum st_lsm6dsx_fifo_mode fifo_mode);
+int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw);
+int st_lsm6dsx_read_tagged_fifo(struct st_lsm6dsx_hw *hw);
+int st_lsm6dsx_check_odr(struct st_lsm6dsx_sensor *sensor, u16 odr, u8 *val);
 
 #endif /* ST_LSM6DSX_H */

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c

@@ -12,6 +12,11 @@
  * buffer contains the data of all the enabled FIFO data sets
  * (e.g. Gx, Gy, Gz, Ax, Ay, Az), then data are repeated depending on the
  * value of the decimation factor and ODR set for each FIFO data set.
+ *
+ * LSM6DSO: The FIFO buffer can be configured to store data from gyroscope and
+ * accelerometer. Each sample is queued with a tag (1B) indicating data source
+ * (gyroscope, accelerometer, hw timer).
+ *
  * FIFO supported modes:
  *  - BYPASS: FIFO disabled
  *  - CONTINUOUS: FIFO enabled. When the buffer is full, the FIFO index
@@ -46,6 +51,7 @@
 #define ST_LSM6DSX_FIFO_ODR_MASK		GENMASK(6, 3)
 #define ST_LSM6DSX_FIFO_EMPTY_MASK		BIT(12)
 #define ST_LSM6DSX_REG_FIFO_OUTL_ADDR		0x3e
+#define ST_LSM6DSX_REG_FIFO_OUT_TAG_ADDR	0x78
 #define ST_LSM6DSX_REG_TS_RESET_ADDR		0x42
 
 #define ST_LSM6DSX_MAX_FIFO_ODR_VAL		0x08
@@ -58,6 +64,12 @@ struct st_lsm6dsx_decimator_entry {
 	u8 val;
 };
 
+enum st_lsm6dsx_fifo_tag {
+	ST_LSM6DSX_GYRO_TAG = 0x01,
+	ST_LSM6DSX_ACC_TAG = 0x02,
+	ST_LSM6DSX_TS_TAG = 0x04,
+};
+
 static const
 struct st_lsm6dsx_decimator_entry st_lsm6dsx_decimator_table[] = {
 	{  0, 0x0 },
@@ -177,12 +189,34 @@ static int st_lsm6dsx_set_fifo_odr(struct st_lsm6dsx_sensor *sensor,
 				   bool enable)
 {
 	struct st_lsm6dsx_hw *hw = sensor->hw;
+	const struct st_lsm6dsx_reg *batch_reg;
 	u8 data;
 
-	data = hw->enable_mask ? ST_LSM6DSX_MAX_FIFO_ODR_VAL : 0;
-	return regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_FIFO_MODE_ADDR,
-				 ST_LSM6DSX_FIFO_ODR_MASK,
-				 FIELD_PREP(ST_LSM6DSX_FIFO_ODR_MASK, data));
+	batch_reg = &hw->settings->batch[sensor->id];
+	if (batch_reg->addr) {
+		int val;
+
+		if (enable) {
+			int err;
+
+			err = st_lsm6dsx_check_odr(sensor, sensor->odr,
+						   &data);
+			if (err < 0)
+				return err;
+		} else {
+			data = 0;
+		}
+		val = ST_LSM6DSX_SHIFT_VAL(data, batch_reg->mask);
+		return regmap_update_bits(hw->regmap, batch_reg->addr,
+					  batch_reg->mask, val);
+	} else {
+		data = hw->enable_mask ? ST_LSM6DSX_MAX_FIFO_ODR_VAL : 0;
+		return regmap_update_bits(hw->regmap,
+					  ST_LSM6DSX_REG_FIFO_MODE_ADDR,
+					  ST_LSM6DSX_FIFO_ODR_MASK,
+					  FIELD_PREP(ST_LSM6DSX_FIFO_ODR_MASK,
+						     data));
+	}
 }
 
 int st_lsm6dsx_update_watermark(struct st_lsm6dsx_sensor *sensor, u16 watermark)
@@ -250,21 +284,21 @@ static int st_lsm6dsx_reset_hw_ts(struct st_lsm6dsx_hw *hw)
 }
 
 /*
- * Set max bulk read to ST_LSM6DSX_MAX_WORD_LEN in order to avoid
- * a kmalloc for each bus access
+ * Set max bulk read to ST_LSM6DSX_MAX_WORD_LEN/ST_LSM6DSX_MAX_TAGGED_WORD_LEN
+ * in order to avoid a kmalloc for each bus access
  */
-static inline int st_lsm6dsx_read_block(struct st_lsm6dsx_hw *hw, u8 *data,
-					unsigned int data_len)
+static inline int st_lsm6dsx_read_block(struct st_lsm6dsx_hw *hw, u8 addr,
+					u8 *data, unsigned int data_len,
+					unsigned int max_word_len)
 {
 	unsigned int word_len, read_len = 0;
 	int err;
 
 	while (read_len < data_len) {
 		word_len = min_t(unsigned int, data_len - read_len,
-				 ST_LSM6DSX_MAX_WORD_LEN);
-		err = regmap_bulk_read(hw->regmap,
-				       ST_LSM6DSX_REG_FIFO_OUTL_ADDR,
-				       data + read_len, word_len);
+				 max_word_len);
+		err = regmap_bulk_read(hw->regmap, addr, data + read_len,
+				       word_len);
 		if (err < 0)
 			return err;
 		read_len += word_len;
@@ -282,7 +316,7 @@ static inline int st_lsm6dsx_read_block(struct st_lsm6dsx_hw *hw, u8 *data,
  *
  * Return: Number of bytes read from the FIFO
  */
-static int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw)
+int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw)
 {
 	u16 fifo_len, pattern_len = hw->sip * ST_LSM6DSX_SAMPLE_SIZE;
 	u16 fifo_diff_mask = hw->settings->fifo_ops.fifo_diff.mask;
@@ -314,7 +348,9 @@ static int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw)
 	gyro_sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_GYRO]);
 
 	for (read_len = 0; read_len < fifo_len; read_len += pattern_len) {
-		err = st_lsm6dsx_read_block(hw, hw->buff, pattern_len);
+		err = st_lsm6dsx_read_block(hw, ST_LSM6DSX_REG_FIFO_OUTL_ADDR,
+					    hw->buff, pattern_len,
+					    ST_LSM6DSX_MAX_WORD_LEN);
 		if (err < 0) {
 			dev_err(hw->dev,
 				"failed to read pattern from fifo (err=%d)\n",
@@ -400,13 +436,111 @@ static int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw)
 	return read_len;
 }
 
+/**
+ * st_lsm6dsx_read_tagged_fifo() - LSM6DSO read FIFO routine
+ * @hw: Pointer to instance of struct st_lsm6dsx_hw.
+ *
+ * Read samples from the hw FIFO and push them to IIO buffers.
+ *
+ * Return: Number of bytes read from the FIFO
+ */
+int st_lsm6dsx_read_tagged_fifo(struct st_lsm6dsx_hw *hw)
+{
+	u16 pattern_len = hw->sip * ST_LSM6DSX_TAGGED_SAMPLE_SIZE;
+	u16 fifo_len, fifo_diff_mask;
+	struct st_lsm6dsx_sensor *acc_sensor, *gyro_sensor;
+	u8 iio_buff[ST_LSM6DSX_IIO_BUFF_SIZE], tag;
+	bool reset_ts = false;
+	int i, err, read_len;
+	__le16 fifo_status;
+	s64 ts = 0;
+
+	err = regmap_bulk_read(hw->regmap,
+			       hw->settings->fifo_ops.fifo_diff.addr,
+			       &fifo_status, sizeof(fifo_status));
+	if (err < 0) {
+		dev_err(hw->dev, "failed to read fifo status (err=%d)\n",
+			err);
+		return err;
+	}
+
+	fifo_diff_mask = hw->settings->fifo_ops.fifo_diff.mask;
+	fifo_len = (le16_to_cpu(fifo_status) & fifo_diff_mask) *
+		   ST_LSM6DSX_TAGGED_SAMPLE_SIZE;
+	if (!fifo_len)
+		return 0;
+
+	acc_sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_ACC]);
+	gyro_sensor = iio_priv(hw->iio_devs[ST_LSM6DSX_ID_GYRO]);
+
+	for (read_len = 0; read_len < fifo_len; read_len += pattern_len) {
+		err = st_lsm6dsx_read_block(hw,
+					    ST_LSM6DSX_REG_FIFO_OUT_TAG_ADDR,
+					    hw->buff, pattern_len,
+					    ST_LSM6DSX_MAX_TAGGED_WORD_LEN);
+		if (err < 0) {
+			dev_err(hw->dev,
+				"failed to read pattern from fifo (err=%d)\n",
+				err);
+			return err;
+		}
+
+		for (i = 0; i < pattern_len;
+		     i += ST_LSM6DSX_TAGGED_SAMPLE_SIZE) {
+			memcpy(iio_buff, &hw->buff[i + ST_LSM6DSX_TAG_SIZE],
+			       ST_LSM6DSX_SAMPLE_SIZE);
+
+			tag = hw->buff[i] >> 3;
+			switch (tag) {
+			case ST_LSM6DSX_TS_TAG:
+				/*
+				 * hw timestamp is 4B long and it is stored
+				 * in FIFO according to this schema:
+				 * B0 = ts[7:0], B1 = ts[15:8], B2 = ts[23:16],
+				 * B3 = ts[31:24]
+				 */
+				ts = le32_to_cpu(*((__le32 *)iio_buff));
+				/*
+				 * check if hw timestamp engine is going to
+				 * reset (the sensor generates an interrupt
+				 * to signal the hw timestamp will reset in
+				 * 1.638s)
+				 */
+				if (!reset_ts && ts >= 0xffff0000)
+					reset_ts = true;
+				ts *= ST_LSM6DSX_TS_SENSITIVITY;
+				break;
+			case ST_LSM6DSX_GYRO_TAG:
+				iio_push_to_buffers_with_timestamp(
+					hw->iio_devs[ST_LSM6DSX_ID_GYRO],
+					iio_buff, gyro_sensor->ts_ref + ts);
+				break;
+			case ST_LSM6DSX_ACC_TAG:
+				iio_push_to_buffers_with_timestamp(
+					hw->iio_devs[ST_LSM6DSX_ID_ACC],
+					iio_buff, acc_sensor->ts_ref + ts);
+				break;
+			default:
+				break;
+			}
+		}
+	}
+
+	if (unlikely(reset_ts)) {
+		err = st_lsm6dsx_reset_hw_ts(hw);
+		if (err < 0)
+			return err;
+	}
+	return read_len;
+}
+
 int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw)
 {
 	int err;
 
 	mutex_lock(&hw->fifo_lock);
 
-	st_lsm6dsx_read_fifo(hw);
+	hw->settings->fifo_ops.read_fifo(hw);
 	err = st_lsm6dsx_set_fifo_mode(hw, ST_LSM6DSX_FIFO_BYPASS);
 
 	mutex_unlock(&hw->fifo_lock);
@@ -478,7 +612,7 @@ static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private)
 	int count;
 
 	mutex_lock(&hw->fifo_lock);
-	count = st_lsm6dsx_read_fifo(hw);
+	count = hw->settings->fifo_ops.read_fifo(hw);
 	mutex_unlock(&hw->fifo_lock);
 
 	return !count ? IRQ_NONE : IRQ_HANDLED;

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c

@@ -23,6 +23,12 @@
  *   - Gyroscope supported full-scale [dps]: +-125/+-245/+-500/+-1000/+-2000
  *   - FIFO size: 4KB
  *
+ * - LSM6DSO
+ *   - Accelerometer/Gyroscope supported ODR [Hz]: 13, 26, 52, 104, 208, 416
+ *   - Accelerometer supported full-scale [g]: +-2/+-4/+-8/+-16
+ *   - Gyroscope supported full-scale [dps]: +-125/+-245/+-500/+-1000/+-2000
+ *   - FIFO size: 3KB
+ *
  * Copyright 2016 STMicroelectronics Inc.
  *
  * Lorenzo Bianconi <lorenzo.bianconi@st.com>
@@ -171,6 +177,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 			},
 		},
 		.fifo_ops = {
+			.read_fifo = st_lsm6dsx_read_fifo,
 			.fifo_th = {
 				.addr = 0x06,
 				.mask = GENMASK(11, 0),
@@ -217,6 +224,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 			},
 		},
 		.fifo_ops = {
+			.read_fifo = st_lsm6dsx_read_fifo,
 			.fifo_th = {
 				.addr = 0x06,
 				.mask = GENMASK(11, 0),
@@ -265,6 +273,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 			},
 		},
 		.fifo_ops = {
+			.read_fifo = st_lsm6dsx_read_fifo,
 			.fifo_th = {
 				.addr = 0x06,
 				.mask = GENMASK(10, 0),
@@ -294,6 +303,45 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
 			},
 		},
 	},
+	{
+		.wai = 0x6c,
+		.max_fifo_size = 512,
+		.id = {
+			[0] = ST_LSM6DSO_ID,
+		},
+		.batch = {
+			[ST_LSM6DSX_ID_ACC] = {
+				.addr = 0x09,
+				.mask = GENMASK(3, 0),
+			},
+			[ST_LSM6DSX_ID_GYRO] = {
+				.addr = 0x09,
+				.mask = GENMASK(7, 4),
+			},
+		},
+		.fifo_ops = {
+			.read_fifo = st_lsm6dsx_read_tagged_fifo,
+			.fifo_th = {
+				.addr = 0x07,
+				.mask = GENMASK(8, 0),
+			},
+			.fifo_diff = {
+				.addr = 0x3a,
+				.mask = GENMASK(8, 0),
+			},
+			.th_wl = 1,
+		},
+		.ts_settings = {
+			.timer_en = {
+				.addr = 0x19,
+				.mask = BIT(5),
+			},
+			.decimator = {
+				.addr = 0x0a,
+				.mask = GENMASK(7, 6),
+			},
+		},
+	},
 };
 
 #define ST_LSM6DSX_CHANNEL(chan_type, addr, mod, scan_idx)		\
@@ -395,8 +443,7 @@ static int st_lsm6dsx_set_full_scale(struct st_lsm6dsx_sensor *sensor,
 	return 0;
 }
 
-static int st_lsm6dsx_check_odr(struct st_lsm6dsx_sensor *sensor, u16 odr,
-				u8 *val)
+int st_lsm6dsx_check_odr(struct st_lsm6dsx_sensor *sensor, u16 odr, u8 *val)
 {
 	int i;
 

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i2c.c

@@ -61,6 +61,10 @@ static const struct of_device_id st_lsm6dsx_i2c_of_match[] = {
 		.compatible = "st,ism330dlc",
 		.data = (void *)ST_ISM330DLC_ID,
 	},
+	{
+		.compatible = "st,lsm6dso",
+		.data = (void *)ST_LSM6DSO_ID,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, st_lsm6dsx_i2c_of_match);
@@ -71,6 +75,7 @@ static const struct i2c_device_id st_lsm6dsx_i2c_id_table[] = {
 	{ ST_LSM6DSL_DEV_NAME, ST_LSM6DSL_ID },
 	{ ST_LSM6DSM_DEV_NAME, ST_LSM6DSM_ID },
 	{ ST_ISM330DLC_DEV_NAME, ST_ISM330DLC_ID },
+	{ ST_LSM6DSO_DEV_NAME, ST_LSM6DSO_ID },
 	{},
 };
 MODULE_DEVICE_TABLE(i2c, st_lsm6dsx_i2c_id_table);

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_spi.c

@@ -61,6 +61,10 @@ static const struct of_device_id st_lsm6dsx_spi_of_match[] = {
 		.compatible = "st,ism330dlc",
 		.data = (void *)ST_ISM330DLC_ID,
 	},
+	{
+		.compatible = "st,lsm6dso",
+		.data = (void *)ST_LSM6DSO_ID,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, st_lsm6dsx_spi_of_match);
@@ -71,6 +75,7 @@ static const struct spi_device_id st_lsm6dsx_spi_id_table[] = {
 	{ ST_LSM6DSL_DEV_NAME, ST_LSM6DSL_ID },
 	{ ST_LSM6DSM_DEV_NAME, ST_LSM6DSM_ID },
 	{ ST_ISM330DLC_DEV_NAME, ST_ISM330DLC_ID },
+	{ ST_LSM6DSO_DEV_NAME, ST_LSM6DSO_ID },
 	{},
 };
 MODULE_DEVICE_TABLE(spi, st_lsm6dsx_spi_id_table);

drivers/iio/light/bh1750.c

@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ROHM BH1710/BH1715/BH1721/BH1750/BH1751 ambient light sensor driver
  *
  * Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * Data sheets:
  *  http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1710fvc-e.pdf
  *  http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1715fvc-e.pdf
@@ -281,8 +278,7 @@ static int bh1750_remove(struct i2c_client *client)
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int bh1750_suspend(struct device *dev)
+static int __maybe_unused bh1750_suspend(struct device *dev)
 {
 	int ret;
 	struct bh1750_data *data =
@@ -300,10 +296,6 @@ static int bh1750_suspend(struct device *dev)
 }
 
 static SIMPLE_DEV_PM_OPS(bh1750_pm_ops, bh1750_suspend, NULL);
-#define BH1750_PM_OPS (&bh1750_pm_ops)
-#else
-#define BH1750_PM_OPS NULL
-#endif
 
 static const struct i2c_device_id bh1750_id[] = {
 	{ "bh1710", BH1710 },
@@ -315,10 +307,21 @@ static const struct i2c_device_id bh1750_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, bh1750_id);
 
+static const struct of_device_id bh1750_of_match[] = {
+	{ .compatible = "rohm,bh1710", },
+	{ .compatible = "rohm,bh1715", },
+	{ .compatible = "rohm,bh1721", },
+	{ .compatible = "rohm,bh1750", },
+	{ .compatible = "rohm,bh1751", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, bh1750_of_match);
+
 static struct i2c_driver bh1750_driver = {
 	.driver = {
 		.name = "bh1750",
-		.pm = BH1750_PM_OPS,
+		.of_match_table = bh1750_of_match,
+		.pm = &bh1750_pm_ops,
 	},
 	.probe = bh1750_probe,
 	.remove = bh1750_remove,

drivers/iio/light/max44000.c

@@ -99,7 +99,6 @@ static const int max44000_alspga_shift[] = {0, 2, 4, 7};
  * Handling this internally is also required for buffer support because the
  * channel's scan_type can't be modified dynamically.
  */
-static const int max44000_alstim_shift[] = {0, 2, 4, 6};
 #define MAX44000_ALSTIM_SHIFT(alstim) (2 * (alstim))
 
 /* Available integration times with pretty manual alignment: */

drivers/iio/light/tsl2772.c

@@ -20,6 +20,7 @@
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
 #include <linux/platform_data/tsl2772.h>
+#include <linux/regulator/consumer.h>
 
 /* Cal defs */
 #define PROX_STAT_CAL			0
@@ -107,6 +108,11 @@
 #define TSL2772_ALS_GAIN_TRIM_MIN	250
 #define TSL2772_ALS_GAIN_TRIM_MAX	4000
 
+#define TSL2772_MAX_PROX_LEDS		2
+
+#define TSL2772_BOOT_MIN_SLEEP_TIME	10000
+#define TSL2772_BOOT_MAX_SLEEP_TIME	28000
+
 /* Device family members */
 enum {
 	tsl2571,
@@ -118,7 +124,8 @@ enum {
 	tsl2672,
 	tmd2672,
 	tsl2772,
-	tmd2772
+	tmd2772,
+	apds9930,
 };
 
 enum {
@@ -141,11 +148,21 @@ struct tsl2772_chip_info {
 	const struct iio_info *info;
 };
 
+static const int tsl2772_led_currents[][2] = {
+	{ 100000, TSL2772_100_mA },
+	{  50000, TSL2772_50_mA },
+	{  25000, TSL2772_25_mA },
+	{  13000, TSL2772_13_mA },
+	{      0, 0 }
+};
+
 struct tsl2772_chip {
 	kernel_ulong_t id;
 	struct mutex prox_mutex;
 	struct mutex als_mutex;
 	struct i2c_client *client;
+	struct regulator *vdd_supply;
+	struct regulator *vddio_supply;
 	u16 prox_data;
 	struct tsl2772_als_info als_cur_info;
 	struct tsl2772_settings settings;
@@ -197,6 +214,12 @@ static const struct tsl2772_lux tmd2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {
 	{     0,      0 },
 };
 
+static const struct tsl2772_lux apds9930_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {
+	{ 52000,  96824 },
+	{ 38792,  67132 },
+	{     0,      0 },
+};
+
 static const struct tsl2772_lux *tsl2772_default_lux_table_group[] = {
 	[tsl2571] = tsl2x71_lux_table,
 	[tsl2671] = tsl2x71_lux_table,
@@ -208,6 +231,7 @@ static const struct tsl2772_lux *tsl2772_default_lux_table_group[] = {
 	[tmd2672] = tmd2x72_lux_table,
 	[tsl2772] = tsl2x72_lux_table,
 	[tmd2772] = tmd2x72_lux_table,
+	[apds9930] = apds9930_lux_table,
 };
 
 static const struct tsl2772_settings tsl2772_default_settings = {
@@ -258,6 +282,7 @@ static const int tsl2772_int_time_avail[][6] = {
 	[tmd2672] = { 0, 2730, 0, 2730, 0, 699000 },
 	[tsl2772] = { 0, 2730, 0, 2730, 0, 699000 },
 	[tmd2772] = { 0, 2730, 0, 2730, 0, 699000 },
+	[apds9930] = { 0, 2730, 0, 2730, 0, 699000 },
 };
 
 static int tsl2772_int_calibscale_avail[] = { 1, 8, 16, 120 };
@@ -283,7 +308,8 @@ static const u8 device_channel_config[] = {
 	[tsl2672] = PRX2,
 	[tmd2672] = PRX2,
 	[tsl2772] = ALSPRX2,
-	[tmd2772] = ALSPRX2
+	[tmd2772] = ALSPRX2,
+	[apds9930] = ALSPRX2,
 };
 
 static int tsl2772_read_status(struct tsl2772_chip *chip)
@@ -497,6 +523,7 @@ static int tsl2772_get_prox(struct iio_dev *indio_dev)
 	case tmd2672:
 	case tsl2772:
 	case tmd2772:
+	case apds9930:
 		if (!(ret & TSL2772_STA_PRX_VALID)) {
 			ret = -EINVAL;
 			goto prox_poll_err;
@@ -515,6 +542,75 @@ prox_poll_err:
 	return ret;
 }
 
+static int tsl2772_read_prox_led_current(struct tsl2772_chip *chip)
+{
+	struct device_node *of_node = chip->client->dev.of_node;
+	int ret, tmp, i;
+
+	ret = of_property_read_u32(of_node, "led-max-microamp", &tmp);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; tsl2772_led_currents[i][0] != 0; i++) {
+		if (tmp == tsl2772_led_currents[i][0]) {
+			chip->settings.prox_power = tsl2772_led_currents[i][1];
+			return 0;
+		}
+	}
+
+	dev_err(&chip->client->dev, "Invalid value %d for led-max-microamp\n",
+		tmp);
+
+	return -EINVAL;
+
+}
+
+static int tsl2772_read_prox_diodes(struct tsl2772_chip *chip)
+{
+	struct device_node *of_node = chip->client->dev.of_node;
+	int i, ret, num_leds, prox_diode_mask;
+	u32 leds[TSL2772_MAX_PROX_LEDS];
+
+	ret = of_property_count_u32_elems(of_node, "amstaos,proximity-diodes");
+	if (ret < 0)
+		return ret;
+
+	num_leds = ret;
+	if (num_leds > TSL2772_MAX_PROX_LEDS)
+		num_leds = TSL2772_MAX_PROX_LEDS;
+
+	ret = of_property_read_u32_array(of_node, "amstaos,proximity-diodes",
+					 leds, num_leds);
+	if (ret < 0) {
+		dev_err(&chip->client->dev,
+			"Invalid value for amstaos,proximity-diodes: %d.\n",
+			ret);
+		return ret;
+	}
+
+	prox_diode_mask = 0;
+	for (i = 0; i < num_leds; i++) {
+		if (leds[i] == 0)
+			prox_diode_mask |= TSL2772_DIODE0;
+		else if (leds[i] == 1)
+			prox_diode_mask |= TSL2772_DIODE1;
+		else {
+			dev_err(&chip->client->dev,
+				"Invalid value %d in amstaos,proximity-diodes.\n",
+				leds[i]);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static void tsl2772_parse_dt(struct tsl2772_chip *chip)
+{
+	tsl2772_read_prox_led_current(chip);
+	tsl2772_read_prox_diodes(chip);
+}
+
 /**
  * tsl2772_defaults() - Populates the device nominal operating parameters
  *                      with those provided by a 'platform' data struct or
@@ -541,6 +637,8 @@ static void tsl2772_defaults(struct tsl2772_chip *chip)
 		memcpy(chip->tsl2772_device_lux,
 		       tsl2772_default_lux_table_group[chip->id],
 		       TSL2772_DEFAULT_TABLE_BYTES);
+
+	tsl2772_parse_dt(chip);
 }
 
 /**
@@ -595,6 +693,52 @@ static int tsl2772_als_calibrate(struct iio_dev *indio_dev)
 	return ret;
 }
 
+static void tsl2772_disable_regulators_action(void *_data)
+{
+	struct tsl2772_chip *chip = _data;
+
+	regulator_disable(chip->vdd_supply);
+	regulator_disable(chip->vddio_supply);
+}
+
+static int tsl2772_enable_regulator(struct tsl2772_chip *chip,
+				    struct regulator *regulator)
+{
+	int ret;
+
+	ret = regulator_enable(regulator);
+	if (ret < 0) {
+		dev_err(&chip->client->dev, "Failed to enable regulator: %d\n",
+			ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct regulator *tsl2772_get_regulator(struct tsl2772_chip *chip,
+					       char *name)
+{
+	struct regulator *regulator;
+	int ret;
+
+	regulator = devm_regulator_get(&chip->client->dev, name);
+	if (IS_ERR(regulator)) {
+		if (PTR_ERR(regulator) != -EPROBE_DEFER)
+			dev_err(&chip->client->dev,
+				"Failed to get %s regulator %d\n",
+				name, (int)PTR_ERR(regulator));
+
+		return regulator;
+	}
+
+	ret = tsl2772_enable_regulator(chip, regulator);
+	if (ret < 0)
+		return ERR_PTR(ret);
+
+	return regulator;
+}
+
 static int tsl2772_chip_on(struct iio_dev *indio_dev)
 {
 	struct tsl2772_chip *chip = iio_priv(indio_dev);
@@ -1260,6 +1404,7 @@ static int tsl2772_device_id_verif(int id, int target)
 	case tmd2672:
 	case tsl2772:
 	case tmd2772:
+	case apds9930:
 		return (id & 0xf0) == SWORDFISH_ID;
 	}
 
@@ -1652,6 +1797,27 @@ static int tsl2772_probe(struct i2c_client *clientp,
 	chip->client = clientp;
 	i2c_set_clientdata(clientp, indio_dev);
 
+	chip->vddio_supply = tsl2772_get_regulator(chip, "vddio");
+	if (IS_ERR(chip->vddio_supply))
+		return PTR_ERR(chip->vddio_supply);
+
+	chip->vdd_supply = tsl2772_get_regulator(chip, "vdd");
+	if (IS_ERR(chip->vdd_supply)) {
+		regulator_disable(chip->vddio_supply);
+		return PTR_ERR(chip->vdd_supply);
+	}
+
+	ret = devm_add_action(&clientp->dev, tsl2772_disable_regulators_action,
+			      chip);
+	if (ret < 0) {
+		tsl2772_disable_regulators_action(chip);
+		dev_err(&clientp->dev, "Failed to setup regulator cleanup action %d\n",
+			ret);
+		return ret;
+	}
+
+	usleep_range(TSL2772_BOOT_MIN_SLEEP_TIME, TSL2772_BOOT_MAX_SLEEP_TIME);
+
 	ret = i2c_smbus_read_byte_data(chip->client,
 				       TSL2772_CMD_REG | TSL2772_CHIPID);
 	if (ret < 0)
@@ -1725,13 +1891,33 @@ static int tsl2772_probe(struct i2c_client *clientp,
 static int tsl2772_suspend(struct device *dev)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct tsl2772_chip *chip = iio_priv(indio_dev);
+	int ret;
+
+	ret = tsl2772_chip_off(indio_dev);
+	regulator_disable(chip->vdd_supply);
+	regulator_disable(chip->vddio_supply);
 
-	return tsl2772_chip_off(indio_dev);
+	return ret;
 }
 
 static int tsl2772_resume(struct device *dev)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct tsl2772_chip *chip = iio_priv(indio_dev);
+	int ret;
+
+	ret = tsl2772_enable_regulator(chip, chip->vddio_supply);
+	if (ret < 0)
+		return ret;
+
+	ret = tsl2772_enable_regulator(chip, chip->vdd_supply);
+	if (ret < 0) {
+		regulator_disable(chip->vddio_supply);
+		return ret;
+	}
+
+	usleep_range(TSL2772_BOOT_MIN_SLEEP_TIME, TSL2772_BOOT_MAX_SLEEP_TIME);
 
 	return tsl2772_chip_on(indio_dev);
 }
@@ -1758,6 +1944,7 @@ static const struct i2c_device_id tsl2772_idtable[] = {
 	{ "tmd2672", tmd2672 },
 	{ "tsl2772", tsl2772 },
 	{ "tmd2772", tmd2772 },
+	{ "apds9930", apds9930},
 	{}
 };
 
@@ -1774,6 +1961,7 @@ static const struct of_device_id tsl2772_of_match[] = {
 	{ .compatible = "amstaos,tmd2672" },
 	{ .compatible = "amstaos,tsl2772" },
 	{ .compatible = "amstaos,tmd2772" },
+	{ .compatible = "avago,apds9930" },
 	{}
 };
 MODULE_DEVICE_TABLE(of, tsl2772_of_match);

drivers/iio/magnetometer/hmc5843.h

@@ -31,7 +31,7 @@ enum hmc5843_ids {
 };
 
 /**
- * struct hcm5843_data	- device specific data
+ * struct hmc5843_data	- device specific data
  * @dev:		actual device
  * @lock:		update and read regmap data
  * @regmap:		hardware access register maps

drivers/iio/multiplexer/iio-mux.c

@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * IIO multiplexer driver
  *
  * Copyright (C) 2017 Axentia Technologies AB
  *
  * Author: Peter Rosin <peda@axentia.se>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/err.h>

drivers/iio/potentiometer/max5481.c

@@ -137,7 +137,6 @@ static int max5481_probe(struct spi_device *spi)
 	struct iio_dev *indio_dev;
 	struct max5481_data *data;
 	const struct spi_device_id *id = spi_get_device_id(spi);
-	const struct of_device_id *match;
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*data));
@@ -149,10 +148,8 @@ static int max5481_probe(struct spi_device *spi)
 
 	data->spi = spi;
 
-	match = of_match_device(of_match_ptr(max5481_match), &spi->dev);
-	if (match)
-		data->cfg = of_device_get_match_data(&spi->dev);
-	else
+	data->cfg = of_device_get_match_data(&spi->dev);
+	if (!data->cfg)
 		data->cfg = &max5481_cfg[id->driver_data];
 
 	indio_dev->name = id->name;

drivers/iio/potentiometer/mcp4018.c

@@ -147,7 +147,6 @@ static int mcp4018_probe(struct i2c_client *client)
 	struct device *dev = &client->dev;
 	struct mcp4018_data *data;
 	struct iio_dev *indio_dev;
-	const struct of_device_id *match;
 
 	if (!i2c_check_functionality(client->adapter,
 				     I2C_FUNC_SMBUS_BYTE)) {
@@ -162,10 +161,8 @@ static int mcp4018_probe(struct i2c_client *client)
 	i2c_set_clientdata(client, indio_dev);
 	data->client = client;
 
-	match = of_match_device(of_match_ptr(mcp4018_of_match), dev);
-	if (match)
-		data->cfg = of_device_get_match_data(dev);
-	else
+	data->cfg = of_device_get_match_data(dev);
+	if (!data->cfg)
 		data->cfg = &mcp4018_cfg[i2c_match_id(mcp4018_id, client)->driver_data];
 
 	indio_dev->dev.parent = dev;
@@ -190,4 +187,4 @@ module_i2c_driver(mcp4018_driver);
 
 MODULE_AUTHOR("Peter Rosin <peda@axentia.se>");
 MODULE_DESCRIPTION("MCP4018 digital potentiometer");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");

drivers/iio/potentiometer/mcp4531.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Industrial I/O driver for Microchip digital potentiometers
  * Copyright (c) 2015  Axentia Technologies AB
@@ -22,10 +23,6 @@
  * mcp4652	2	257		5, 10, 50, 100          01011xx
  * mcp4661	2	257		5, 10, 50, 100          0101xxx
  * mcp4662	2	257		5, 10, 50, 100          01011xx
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #include <linux/module.h>
@@ -360,7 +357,6 @@ static int mcp4531_probe(struct i2c_client *client)
 	struct device *dev = &client->dev;
 	struct mcp4531_data *data;
 	struct iio_dev *indio_dev;
-	const struct of_device_id *match;
 
 	if (!i2c_check_functionality(client->adapter,
 				     I2C_FUNC_SMBUS_WORD_DATA)) {
@@ -375,10 +371,8 @@ static int mcp4531_probe(struct i2c_client *client)
 	i2c_set_clientdata(client, indio_dev);
 	data->client = client;
 
-	match = of_match_device(of_match_ptr(mcp4531_of_match), dev);
-	if (match)
-		data->cfg = of_device_get_match_data(dev);
-	else
+	data->cfg = of_device_get_match_data(dev);
+	if (!data->cfg)
 		data->cfg = &mcp4531_cfg[i2c_match_id(mcp4531_id, client)->driver_data];
 
 	indio_dev->dev.parent = dev;
@@ -403,4 +397,4 @@ module_i2c_driver(mcp4531_driver);
 
 MODULE_AUTHOR("Peter Rosin <peda@axentia.se>");
 MODULE_DESCRIPTION("MCP4531 digital potentiometer");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");

drivers/iio/pressure/ms5611.h

@@ -1,12 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * MS5611 pressure and temperature sensor driver
  *
  * Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  */
 
 #ifndef _MS5611_H

drivers/iio/pressure/ms5611_core.c

@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * MS5611 pressure and temperature sensor driver
  *
  * Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * Data sheet:
  *  http://www.meas-spec.com/downloads/MS5611-01BA03.pdf
  *  http://www.meas-spec.com/downloads/MS5607-02BA03.pdf

drivers/iio/pressure/ms5611_i2c.c

@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * MS5611 pressure and temperature sensor driver (I2C bus)
  *
  * Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * 7-bit I2C slave addresses:
  *
  * 0x77 (CSB pin low)
@@ -117,9 +114,7 @@ static int ms5611_i2c_remove(struct i2c_client *client)
 #if defined(CONFIG_OF)
 static const struct of_device_id ms5611_i2c_matches[] = {
 	{ .compatible = "meas,ms5611" },
-	{ .compatible = "ms5611" },
 	{ .compatible = "meas,ms5607" },
-	{ .compatible = "ms5607" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ms5611_i2c_matches);

drivers/iio/pressure/ms5611_spi.c

@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * MS5611 pressure and temperature sensor driver (SPI bus)
  *
  * Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  */
 
 #include <linux/delay.h>
@@ -119,9 +116,7 @@ static int ms5611_spi_remove(struct spi_device *spi)
 #if defined(CONFIG_OF)
 static const struct of_device_id ms5611_spi_matches[] = {
 	{ .compatible = "meas,ms5611" },
-	{ .compatible = "ms5611" },
 	{ .compatible = "meas,ms5607" },
-	{ .compatible = "ms5607" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ms5611_spi_matches);

drivers/iio/proximity/Kconfig

@@ -92,4 +92,15 @@ config SRF08
 	  To compile this driver as a module, choose M here: the
 	  module will be called srf08.
 
+config VL53L0X_I2C
+	tristate "STMicroelectronics VL53L0X ToF ranger sensor (I2C)"
+	depends on I2C
+	help
+	  Say Y here to build a driver for STMicroelectronics VL53L0X
+	  ToF ranger sensors with i2c interface.
+	  This driver can be used to measure the distance of objects.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called vl53l0x-i2c.
+
 endmenu

drivers/iio/proximity/Makefile

@@ -11,3 +11,5 @@ obj-$(CONFIG_RFD77402)		+= rfd77402.o
 obj-$(CONFIG_SRF04)		+= srf04.o
 obj-$(CONFIG_SRF08)		+= srf08.o
 obj-$(CONFIG_SX9500)		+= sx9500.o
+obj-$(CONFIG_VL53L0X_I2C)	+= vl53l0x-i2c.o
+

drivers/iio/proximity/isl29501.c

@@ -232,7 +232,6 @@ static u32 isl29501_register_write(struct isl29501_private *isl29501,
 				   u32 value)
 {
 	const struct isl29501_register_desc *reg = &isl29501_registers[name];
-	u8 msb, lsb;
 	int ret;
 
 	if (!reg->msb && value > U8_MAX)
@@ -241,22 +240,15 @@ static u32 isl29501_register_write(struct isl29501_private *isl29501,
 	if (value > U16_MAX)
 		return -ERANGE;
 
-	if (!reg->msb) {
-		lsb = value & 0xFF;
-	} else {
-		msb = (value >> 8) & 0xFF;
-		lsb = value & 0xFF;
-	}
-
 	mutex_lock(&isl29501->lock);
 	if (reg->msb) {
 		ret = i2c_smbus_write_byte_data(isl29501->client,
-						reg->msb, msb);
+						reg->msb, value >> 8);
 		if (ret < 0)
 			goto err;
 	}
 
-	ret = i2c_smbus_write_byte_data(isl29501->client, reg->lsb, lsb);
+	ret = i2c_smbus_write_byte_data(isl29501->client, reg->lsb, value);
 
 err:
 	mutex_unlock(&isl29501->lock);

drivers/iio/proximity/vl53l0x-i2c.c

@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Support for ST VL53L0X FlightSense ToF Ranging Sensor on a i2c bus.
+ *
+ * Copyright (C) 2016 STMicroelectronics Imaging Division.
+ * Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com>
+ *
+ * Datasheet available at
+ * <https://www.st.com/resource/en/datasheet/vl53l0x.pdf>
+ *
+ * Default 7-bit i2c slave address 0x29.
+ *
+ * TODO: FIFO buffer, continuous mode, interrupts, range selection,
+ * sensor ID check.
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+
+#include <linux/iio/iio.h>
+
+#define VL_REG_SYSRANGE_START				0x00
+
+#define VL_REG_SYSRANGE_MODE_MASK			GENMASK(3, 0)
+#define VL_REG_SYSRANGE_MODE_SINGLESHOT			0x00
+#define VL_REG_SYSRANGE_MODE_START_STOP			BIT(0)
+#define VL_REG_SYSRANGE_MODE_BACKTOBACK			BIT(1)
+#define VL_REG_SYSRANGE_MODE_TIMED			BIT(2)
+#define VL_REG_SYSRANGE_MODE_HISTOGRAM			BIT(3)
+
+#define VL_REG_RESULT_INT_STATUS			0x13
+#define VL_REG_RESULT_RANGE_STATUS			0x14
+#define VL_REG_RESULT_RANGE_STATUS_COMPLETE		BIT(0)
+
+struct vl53l0x_data {
+	struct i2c_client *client;
+};
+
+static int vl53l0x_read_proximity(struct vl53l0x_data *data,
+				  const struct iio_chan_spec *chan,
+				  int *val)
+{
+	struct i2c_client *client = data->client;
+	u16 tries = 20;
+	u8 buffer[12];
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(client, VL_REG_SYSRANGE_START, 1);
+	if (ret < 0)
+		return ret;
+
+	do {
+		ret = i2c_smbus_read_byte_data(client,
+					       VL_REG_RESULT_RANGE_STATUS);
+		if (ret < 0)
+			return ret;
+
+		if (ret & VL_REG_RESULT_RANGE_STATUS_COMPLETE)
+			break;
+
+		usleep_range(1000, 5000);
+	} while (--tries);
+	if (!tries)
+		return -ETIMEDOUT;
+
+	ret = i2c_smbus_read_i2c_block_data(client, VL_REG_RESULT_RANGE_STATUS,
+					    12, buffer);
+	if (ret < 0)
+		return ret;
+	else if (ret != 12)
+		return -EREMOTEIO;
+
+	/* Values should be between 30~1200 in millimeters. */
+	*val = (buffer[10] << 8) + buffer[11];
+
+	return 0;
+}
+
+static const struct iio_chan_spec vl53l0x_channels[] = {
+	{
+		.type = IIO_DISTANCE,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE),
+	},
+};
+
+static int vl53l0x_read_raw(struct iio_dev *indio_dev,
+			    const struct iio_chan_spec *chan,
+			    int *val, int *val2, long mask)
+{
+	struct vl53l0x_data *data = iio_priv(indio_dev);
+	int ret;
+
+	if (chan->type != IIO_DISTANCE)
+		return -EINVAL;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		ret = vl53l0x_read_proximity(data, chan, val);
+		if (ret < 0)
+			return ret;
+
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = 1000;
+
+		return IIO_VAL_INT_PLUS_MICRO;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info vl53l0x_info = {
+	.read_raw = vl53l0x_read_raw,
+};
+
+static int vl53l0x_probe(struct i2c_client *client)
+{
+	struct vl53l0x_data *data;
+	struct iio_dev *indio_dev;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	data->client = client;
+	i2c_set_clientdata(client, indio_dev);
+
+	if (!i2c_check_functionality(client->adapter,
+				     I2C_FUNC_SMBUS_READ_I2C_BLOCK |
+				     I2C_FUNC_SMBUS_BYTE_DATA))
+		return -EOPNOTSUPP;
+
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->name = "vl53l0x";
+	indio_dev->info = &vl53l0x_info;
+	indio_dev->channels = vl53l0x_channels;
+	indio_dev->num_channels = ARRAY_SIZE(vl53l0x_channels);
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static const struct of_device_id st_vl53l0x_dt_match[] = {
+	{ .compatible = "st,vl53l0x", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, st_vl53l0x_dt_match);
+
+static struct i2c_driver vl53l0x_driver = {
+	.driver = {
+		.name = "vl53l0x-i2c",
+		.of_match_table = st_vl53l0x_dt_match,
+	},
+	.probe_new = vl53l0x_probe,
+};
+module_i2c_driver(vl53l0x_driver);
+
+MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>");
+MODULE_DESCRIPTION("ST vl53l0x ToF ranging sensor driver");
+MODULE_LICENSE("GPL v2");

drivers/iio/trigger/iio-trig-sysfs.c

@@ -222,7 +222,7 @@ static void __exit iio_sysfs_trig_exit(void)
 }
 module_exit(iio_sysfs_trig_exit);
 
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 MODULE_DESCRIPTION("Sysfs based trigger for the iio subsystem");
 MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("platform:iio-trig-sysfs");

drivers/staging/Kconfig

@@ -80,8 +80,6 @@ source "drivers/staging/netlogic/Kconfig"
 
 source "drivers/staging/mt29f_spinand/Kconfig"
 
-source "drivers/staging/dgnc/Kconfig"
-
 source "drivers/staging/gs_fpgaboot/Kconfig"
 
 source "drivers/staging/unisys/Kconfig"

drivers/staging/Makefile

@@ -29,7 +29,6 @@ obj-$(CONFIG_STAGING_BOARD)	+= board/
 obj-$(CONFIG_LTE_GDM724X)	+= gdm724x/
 obj-$(CONFIG_FIREWIRE_SERIAL)	+= fwserial/
 obj-$(CONFIG_GOLDFISH)		+= goldfish/
-obj-$(CONFIG_DGNC)			+= dgnc/
 obj-$(CONFIG_MTD_SPINAND_MT29F)	+= mt29f_spinand/
 obj-$(CONFIG_GS_FPGABOOT)	+= gs_fpgaboot/
 obj-$(CONFIG_UNISYSSPAR)	+= unisys/

drivers/staging/android/ion/ion.h

@@ -157,8 +157,6 @@ struct ion_heap_ops {
  * @lock:		protects the free list
  * @waitqueue:		queue to wait on from deferred free thread
  * @task:		task struct of deferred free thread
- * @debug_show:		called when heap debug file is read to add any
- *			heap specific debug info to output
  *
  * Represents a pool of memory from which buffers can be made.  In some
  * systems the only heap is regular system memory allocated via vmalloc.
@@ -179,9 +177,6 @@ struct ion_heap {
 	spinlock_t free_lock;
 	wait_queue_head_t waitqueue;
 	struct task_struct *task;
-
-	int (*debug_show)(struct ion_heap *heap, struct seq_file *s,
-			  void *unused);
 };
 
 /**

drivers/staging/android/ion/ion_system_heap.c

@@ -212,29 +212,6 @@ static struct ion_heap_ops system_heap_ops = {
 	.shrink = ion_system_heap_shrink,
 };
 
-static int ion_system_heap_debug_show(struct ion_heap *heap, struct seq_file *s,
-				      void *unused)
-{
-	struct ion_system_heap *sys_heap = container_of(heap,
-							struct ion_system_heap,
-							heap);
-	int i;
-	struct ion_page_pool *pool;
-
-	for (i = 0; i < NUM_ORDERS; i++) {
-		pool = sys_heap->pools[i];
-
-		seq_printf(s, "%d order %u highmem pages %lu total\n",
-			   pool->high_count, pool->order,
-			   (PAGE_SIZE << pool->order) * pool->high_count);
-		seq_printf(s, "%d order %u lowmem pages %lu total\n",
-			   pool->low_count, pool->order,
-			   (PAGE_SIZE << pool->order) * pool->low_count);
-	}
-
-	return 0;
-}
-
 static void ion_system_heap_destroy_pools(struct ion_page_pool **pools)
 {
 	int i;
@@ -281,7 +258,6 @@ static struct ion_heap *__ion_system_heap_create(void)
 	if (ion_system_heap_create_pools(heap->pools))
 		goto free_heap;
 
-	heap->heap.debug_show = ion_system_heap_debug_show;
 	return &heap->heap;
 
 free_heap:

drivers/staging/axis-fifo/axis-fifo.c

@@ -27,8 +27,6 @@
 #include <linux/interrupt.h>
 #include <linux/param.h>
 #include <linux/fs.h>
-#include <linux/device.h>
-#include <linux/cdev.h>
 #include <linux/types.h>
 #include <linux/uaccess.h>
 #include <linux/jiffies.h>
@@ -364,11 +362,11 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 		 * if nothing is currently available
 		 */
 		spin_lock_irq(&fifo->read_queue_lock);
-		ret = wait_event_interruptible_lock_irq_timeout(
-			fifo->read_queue,
-			ioread32(fifo->base_addr + XLLF_RDFO_OFFSET),
-			fifo->read_queue_lock,
-			(read_timeout >= 0) ? msecs_to_jiffies(read_timeout) :
+		ret = wait_event_interruptible_lock_irq_timeout
+			(fifo->read_queue,
+			 ioread32(fifo->base_addr + XLLF_RDFO_OFFSET),
+			 fifo->read_queue_lock,
+			 (read_timeout >= 0) ? msecs_to_jiffies(read_timeout) :
 				MAX_SCHEDULE_TIMEOUT);
 		spin_unlock_irq(&fifo->read_queue_lock);
 
@@ -482,12 +480,12 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 		 * currently enough room in the fifo
 		 */
 		spin_lock_irq(&fifo->write_queue_lock);
-		ret = wait_event_interruptible_lock_irq_timeout(
-			fifo->write_queue,
-			ioread32(fifo->base_addr + XLLF_TDFV_OFFSET)
+		ret = wait_event_interruptible_lock_irq_timeout
+			(fifo->write_queue,
+			 ioread32(fifo->base_addr + XLLF_TDFV_OFFSET)
 				>= words_to_write,
-			fifo->write_queue_lock,
-			(write_timeout >= 0) ? msecs_to_jiffies(write_timeout) :
+			 fifo->write_queue_lock,
+			 (write_timeout >= 0) ? msecs_to_jiffies(write_timeout) :
 				MAX_SCHEDULE_TIMEOUT);
 		spin_unlock_irq(&fifo->write_queue_lock);
 
@@ -1089,6 +1087,8 @@ static int __init axis_fifo_init(void)
 	pr_info("axis-fifo driver loaded with parameters read_timeout = %i, write_timeout = %i\n",
 		read_timeout, write_timeout);
 	axis_fifo_driver_class = class_create(THIS_MODULE, DRIVER_NAME);
+	if (IS_ERR(axis_fifo_driver_class))
+		return PTR_ERR(axis_fifo_driver_class);
 	return platform_driver_register(&axis_fifo_driver);
 }
 

drivers/staging/clocking-wizard/clk-xlnx-clock-wizard.c

@@ -199,10 +199,10 @@ static int clk_wzrd_probe(struct platform_device *pdev)
 		ret = -ENOMEM;
 		goto err_disable_clk;
 	}
-	clk_wzrd->clks_internal[wzrd_clk_mul] = clk_register_fixed_factor(
-			&pdev->dev, clk_name,
-			__clk_get_name(clk_wzrd->clk_in1),
-			0, reg, 1);
+	clk_wzrd->clks_internal[wzrd_clk_mul] = clk_register_fixed_factor
+			(&pdev->dev, clk_name,
+			 __clk_get_name(clk_wzrd->clk_in1),
+			 0, reg, 1);
 	kfree(clk_name);
 	if (IS_ERR(clk_wzrd->clks_internal[wzrd_clk_mul])) {
 		dev_err(&pdev->dev, "unable to register fixed-factor clock\n");
@@ -219,10 +219,10 @@ static int clk_wzrd_probe(struct platform_device *pdev)
 		goto err_rm_int_clk;
 	}
 
-	clk_wzrd->clks_internal[wzrd_clk_mul_div] = clk_register_fixed_factor(
-			&pdev->dev, clk_name,
-			__clk_get_name(clk_wzrd->clks_internal[wzrd_clk_mul]),
-			0, 1, reg);
+	clk_wzrd->clks_internal[wzrd_clk_mul_div] = clk_register_fixed_factor
+			(&pdev->dev, clk_name,
+			 __clk_get_name(clk_wzrd->clks_internal[wzrd_clk_mul]),
+			 0, 1, reg);
 	if (IS_ERR(clk_wzrd->clks_internal[wzrd_clk_mul_div])) {
 		dev_err(&pdev->dev, "unable to register divider clock\n");
 		ret = PTR_ERR(clk_wzrd->clks_internal[wzrd_clk_mul_div]);
@@ -243,8 +243,8 @@ static int clk_wzrd_probe(struct platform_device *pdev)
 		reg = readl(clk_wzrd->base + WZRD_CLK_CFG_REG(2) + i * 12);
 		reg &= WZRD_CLKOUT_DIVIDE_MASK;
 		reg >>= WZRD_CLKOUT_DIVIDE_SHIFT;
-		clk_wzrd->clkout[i] = clk_register_fixed_factor(&pdev->dev,
-				clkout_name, clk_name, 0, 1, reg);
+		clk_wzrd->clkout[i] = clk_register_fixed_factor
+			(&pdev->dev, clkout_name, clk_name, 0, 1, reg);
 		if (IS_ERR(clk_wzrd->clkout[i])) {
 			int j;
 

drivers/staging/comedi/Kconfig

@@ -1313,5 +1313,9 @@ config COMEDI_NI_LABPC_ISADMA
 
 config COMEDI_NI_TIO
 	tristate
+	select COMEDI_NI_ROUTING
+
+config COMEDI_NI_ROUTING
+	tristate
 
 endif # COMEDI

drivers/staging/comedi/comedi.h

@@ -107,6 +107,7 @@
 #define INSN_WRITE		(1 | INSN_MASK_WRITE)
 #define INSN_BITS		(2 | INSN_MASK_READ | INSN_MASK_WRITE)
 #define INSN_CONFIG		(3 | INSN_MASK_READ | INSN_MASK_WRITE)
+#define INSN_DEVICE_CONFIG	(INSN_CONFIG | INSN_MASK_SPECIAL)
 #define INSN_GTOD		(4 | INSN_MASK_READ | INSN_MASK_SPECIAL)
 #define INSN_WAIT		(5 | INSN_MASK_WRITE | INSN_MASK_SPECIAL)
 #define INSN_INTTRIG		(6 | INSN_MASK_WRITE | INSN_MASK_SPECIAL)
@@ -301,6 +302,8 @@ enum comedi_io_direction {
  * @INSN_CONFIG_PWM_SET_H_BRIDGE: Set PWM H bridge duty cycle and polarity for
  *				a relay simultaneously.
  * @INSN_CONFIG_PWM_GET_H_BRIDGE: Get PWM H bridge duty cycle and polarity.
+ * @INSN_CONFIG_GET_CMD_TIMING_CONSTRAINTS: Get the hardware timing restraints,
+ *				regardless of trigger sources.
  */
 enum configuration_ids {
 	INSN_CONFIG_DIO_INPUT = COMEDI_INPUT,
@@ -344,7 +347,25 @@ enum configuration_ids {
 	INSN_CONFIG_PWM_GET_PERIOD = 5001,
 	INSN_CONFIG_GET_PWM_STATUS = 5002,
 	INSN_CONFIG_PWM_SET_H_BRIDGE = 5003,
-	INSN_CONFIG_PWM_GET_H_BRIDGE = 5004
+	INSN_CONFIG_PWM_GET_H_BRIDGE = 5004,
+	INSN_CONFIG_GET_CMD_TIMING_CONSTRAINTS = 5005,
+};
+
+/**
+ * enum device_configuration_ids - COMEDI configuration instruction codes global
+ * to an entire device.
+ * @INSN_DEVICE_CONFIG_TEST_ROUTE:	Validate the possibility of a
+ *					globally-named route
+ * @INSN_DEVICE_CONFIG_CONNECT_ROUTE:	Connect a globally-named route
+ * @INSN_DEVICE_CONFIG_DISCONNECT_ROUTE:Disconnect a globally-named route
+ * @INSN_DEVICE_CONFIG_GET_ROUTES:	Get a list of all globally-named routes
+ *					that are valid for a particular device.
+ */
+enum device_config_route_ids {
+	INSN_DEVICE_CONFIG_TEST_ROUTE = 0,
+	INSN_DEVICE_CONFIG_CONNECT_ROUTE = 1,
+	INSN_DEVICE_CONFIG_DISCONNECT_ROUTE = 2,
+	INSN_DEVICE_CONFIG_GET_ROUTES = 3,
 };
 
 /**
@@ -928,6 +949,157 @@ enum i8254_mode {
 	I8254_BINARY = 0
 };
 
+/* *** BEGIN GLOBALLY-NAMED NI TERMINALS/SIGNALS *** */
+
+/*
+ * Common National Instruments Terminal/Signal names.
+ * Some of these have no NI_ prefix as they are useful for non-NI hardware, such
+ * as those that utilize the PXI/RTSI trigger lines.
+ *
+ * NOTE ABOUT THE CHOICE OF NAMES HERE AND THE CAMELSCRIPT:
+ *   The choice to use CamelScript and the exact names below is for
+ *   maintainability, clarity, similarity to manufacturer's documentation,
+ *   _and_ a mitigation for confusion that has plagued the use of these drivers
+ *   for years!
+ *
+ *   More detail:
+ *   There have been significant confusions over the past many years for users
+ *   when trying to understand how to connect to/from signals and terminals on
+ *   NI hardware using comedi.  The major reason for this is that the actual
+ *   register values were exposed and required to be used by users.  Several
+ *   major reasons exist why this caused major confusion for users:
+ *   1) The register values are _NOT_ in user documentation, but rather in
+ *     arcane locations, such as a few register programming manuals that are
+ *     increasingly hard to find and the NI MHDDK (comments in in example code).
+ *     There is no one place to find the various valid values of the registers.
+ *   2) The register values are _NOT_ completely consistent.  There is no way to
+ *     gain any sense of intuition of which values, or even enums one should use
+ *     for various registers.  There was some attempt in prior use of comedi to
+ *     name enums such that a user might know which enums should be used for
+ *     varying purposes, but the end-user had to gain a knowledge of register
+ *     values to correctly wield this approach.
+ *   3) The names for signals and registers found in the various register level
+ *     programming manuals and vendor-provided documentation are _not_ even
+ *     close to the same names that are in the end-user documentation.
+ *
+ *   Similar, albeit less, confusion plagued NI's previous version of their own
+ *   drivers.  Earlier than 2003, NI greatly simplified the situation for users
+ *   by releasing a new API that abstracted the names of signals/terminals to a
+ *   common and intuitive set of names.
+ *
+ *   The names below mirror the names chosen and well documented by NI.  These
+ *   names are exposed to the user via the comedilib user library.  By keeping
+ *   the names below, in spite of the use of CamelScript, maintenance will be
+ *   greatly eased and confusion for users _and_ comedi developers will be
+ *   greatly reduced.
+ */
+
+/*
+ * Base of abstracted NI names.
+ * The first 16 bits of *_arg are reserved for channel selection.
+ * Since we only actually need the first 4 or 5 bits for all register values on
+ * NI select registers anyways, we'll identify all values >= (1<<15) as being an
+ * abstracted NI signal/terminal name.
+ * These values are also used/returned by INSN_DEVICE_CONFIG_TEST_ROUTE,
+ * INSN_DEVICE_CONFIG_CONNECT_ROUTE, INSN_DEVICE_CONFIG_DISCONNECT_ROUTE,
+ * and INSN_DEVICE_CONFIG_GET_ROUTES.
+ */
+#define NI_NAMES_BASE	0x8000u
+/*
+ * not necessarily all allowed 64 PFIs are valid--certainly not for all devices
+ */
+#define NI_PFI(x)	(NI_NAMES_BASE        + ((x) & 0x3f))
+/* 8 trigger lines by standard, Some devices cannot talk to all eight. */
+#define TRIGGER_LINE(x)	(NI_PFI(-1)       + 1 + ((x) & 0x7))
+/* 4 RTSI shared MUXes to route signals to/from TRIGGER_LINES on NI hardware */
+#define NI_RTSI_BRD(x)	(TRIGGER_LINE(-1) + 1 + ((x) & 0x3))
+
+/* *** Counter/timer names : 8 counters max *** */
+#define NI_COUNTER_NAMES_BASE  (NI_RTSI_BRD(-1)  + 1)
+#define NI_MAX_COUNTERS	       7
+#define NI_CtrSource(x)	       (NI_COUNTER_NAMES_BASE + ((x) & NI_MAX_COUNTERS))
+/* Gate, Aux, A,B,Z are all treated, at times as gates */
+#define NI_GATES_NAMES_BASE    (NI_CtrSource(-1) + 1)
+#define NI_CtrGate(x)	       (NI_GATES_NAMES_BASE   + ((x) & NI_MAX_COUNTERS))
+#define NI_CtrAux(x)	       (NI_CtrGate(-1)   + 1  + ((x) & NI_MAX_COUNTERS))
+#define NI_CtrA(x)	       (NI_CtrAux(-1)    + 1  + ((x) & NI_MAX_COUNTERS))
+#define NI_CtrB(x)	       (NI_CtrA(-1)      + 1  + ((x) & NI_MAX_COUNTERS))
+#define NI_CtrZ(x)	       (NI_CtrB(-1)      + 1  + ((x) & NI_MAX_COUNTERS))
+#define NI_GATES_NAMES_MAX     NI_CtrZ(-1)
+#define NI_CtrArmStartTrigger(x) (NI_CtrZ(-1)    + 1  + ((x) & NI_MAX_COUNTERS))
+#define NI_CtrInternalOutput(x) \
+		     (NI_CtrArmStartTrigger(-1)  + 1  + ((x) & NI_MAX_COUNTERS))
+/** external pin(s) labeled conveniently as Ctr<i>Out. */
+#define NI_CtrOut(x)  (NI_CtrInternalOutput(-1)  + 1  + ((x) & NI_MAX_COUNTERS))
+/** For Buffered sampling of ctr -- x series capability. */
+#define NI_CtrSampleClock(x)	(NI_CtrOut(-1)   + 1  + ((x) & NI_MAX_COUNTERS))
+#define NI_COUNTER_NAMES_MAX   NI_CtrSampleClock(-1)
+
+enum ni_common_signal_names {
+	/* PXI_Star: this is a non-NI-specific signal */
+	PXI_Star = NI_COUNTER_NAMES_MAX + 1,
+	PXI_Clk10,
+	PXIe_Clk100,
+	NI_AI_SampleClock,
+	NI_AI_SampleClockTimebase,
+	NI_AI_StartTrigger,
+	NI_AI_ReferenceTrigger,
+	NI_AI_ConvertClock,
+	NI_AI_ConvertClockTimebase,
+	NI_AI_PauseTrigger,
+	NI_AI_HoldCompleteEvent,
+	NI_AI_HoldComplete,
+	NI_AI_ExternalMUXClock,
+	NI_AI_STOP, /* pulse signal that occurs when a update is finished(?) */
+	NI_AO_SampleClock,
+	NI_AO_SampleClockTimebase,
+	NI_AO_StartTrigger,
+	NI_AO_PauseTrigger,
+	NI_DI_SampleClock,
+	NI_DI_SampleClockTimebase,
+	NI_DI_StartTrigger,
+	NI_DI_ReferenceTrigger,
+	NI_DI_PauseTrigger,
+	NI_DI_InputBufferFull,
+	NI_DI_ReadyForStartEvent,
+	NI_DI_ReadyForTransferEventBurst,
+	NI_DI_ReadyForTransferEventPipelined,
+	NI_DO_SampleClock,
+	NI_DO_SampleClockTimebase,
+	NI_DO_StartTrigger,
+	NI_DO_PauseTrigger,
+	NI_DO_OutputBufferFull,
+	NI_DO_DataActiveEvent,
+	NI_DO_ReadyForStartEvent,
+	NI_DO_ReadyForTransferEvent,
+	NI_MasterTimebase,
+	NI_20MHzTimebase,
+	NI_80MHzTimebase,
+	NI_100MHzTimebase,
+	NI_200MHzTimebase,
+	NI_100kHzTimebase,
+	NI_10MHzRefClock,
+	NI_FrequencyOutput,
+	NI_ChangeDetectionEvent,
+	NI_AnalogComparisonEvent,
+	NI_WatchdogExpiredEvent,
+	NI_WatchdogExpirationTrigger,
+	NI_SCXI_Trig1,
+	NI_LogicLow,
+	NI_LogicHigh,
+	NI_ExternalStrobe,
+	NI_PFI_DO,
+	NI_CaseGround,
+	/* special internal signal used as variable source for RTSI bus: */
+	NI_RGOUT0,
+
+	/* just a name to make the next more convenient, regardless of above */
+	_NI_NAMES_MAX_PLUS_1,
+	NI_NUM_NAMES = _NI_NAMES_MAX_PLUS_1 - NI_NAMES_BASE,
+};
+
+/* *** END GLOBALLY-NAMED NI TERMINALS/SIGNALS *** */
+
 #define NI_USUAL_PFI_SELECT(x)	(((x) < 10) ? (0x1 + (x)) : (0xb + (x)))
 #define NI_USUAL_RTSI_SELECT(x)	(((x) < 7) ? (0xb + (x)) : 0x1b)
 

drivers/staging/comedi/comedi_fops.c

@@ -1216,6 +1216,10 @@ static int check_insn_config_length(struct comedi_insn *insn,
 		if (insn->n == 6)
 			return 0;
 		break;
+	case INSN_CONFIG_GET_CMD_TIMING_CONSTRAINTS:
+		if (insn->n >= 4)
+			return 0;
+		break;
 		/*
 		 * by default we allow the insn since we don't have checks for
 		 * all possible cases yet
@@ -1230,6 +1234,57 @@ static int check_insn_config_length(struct comedi_insn *insn,
 	return -EINVAL;
 }
 
+static int check_insn_device_config_length(struct comedi_insn *insn,
+					   unsigned int *data)
+{
+	if (insn->n < 1)
+		return -EINVAL;
+
+	switch (data[0]) {
+	case INSN_DEVICE_CONFIG_TEST_ROUTE:
+	case INSN_DEVICE_CONFIG_CONNECT_ROUTE:
+	case INSN_DEVICE_CONFIG_DISCONNECT_ROUTE:
+		if (insn->n == 3)
+			return 0;
+		break;
+	case INSN_DEVICE_CONFIG_GET_ROUTES:
+		/*
+		 * Big enough for config_id and the length of the userland
+		 * memory buffer.  Additional length should be in factors of 2
+		 * to communicate any returned route pairs (source,destination).
+		 */
+		if (insn->n >= 2)
+			return 0;
+		break;
+	}
+	return -EINVAL;
+}
+
+/**
+ * get_valid_routes() - Calls low-level driver get_valid_routes function to
+ *			either return a count of valid routes to user, or copy
+ *			of list of all valid device routes to buffer in
+ *			userspace.
+ * @dev: comedi device pointer
+ * @data: data from user insn call.  The length of the data must be >= 2.
+ *	  data[0] must contain the INSN_DEVICE_CONFIG config_id.
+ *	  data[1](input) contains the number of _pairs_ for which memory is
+ *		  allotted from the user.  If the user specifies '0', then only
+ *		  the number of pairs available is returned.
+ *	  data[1](output) returns either the number of pairs available (if none
+ *		  where requested) or the number of _pairs_ that are copied back
+ *		  to the user.
+ *	  data[2::2] returns each (source, destination) pair.
+ *
+ * Return: -EINVAL if low-level driver does not allocate and return routes as
+ *	   expected.  Returns 0 otherwise.
+ */
+static int get_valid_routes(struct comedi_device *dev, unsigned int *data)
+{
+	data[1] = dev->get_valid_routes(dev, data[1], data + 2);
+	return 0;
+}
+
 static int parse_insn(struct comedi_device *dev, struct comedi_insn *insn,
 		      unsigned int *data, void *file)
 {
@@ -1293,6 +1348,24 @@ static int parse_insn(struct comedi_device *dev, struct comedi_insn *insn,
 			if (ret >= 0)
 				ret = 1;
 			break;
+		case INSN_DEVICE_CONFIG:
+			ret = check_insn_device_config_length(insn, data);
+			if (ret)
+				break;
+
+			if (data[0] == INSN_DEVICE_CONFIG_GET_ROUTES) {
+				/*
+				 * data[1] should be the number of _pairs_ that
+				 * the memory can hold.
+				 */
+				data[1] = (insn->n - 2) / 2;
+				ret = get_valid_routes(dev, data);
+				break;
+			}
+
+			/* other global device config instructions. */
+			ret = dev->insn_device_config(dev, insn, data);
+			break;
 		default:
 			dev_dbg(dev->class_dev, "invalid insn\n");
 			ret = -EINVAL;