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@@ -0,0 +1,124 @@
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+* Analog Device AD5755 IIO Multi-Channel DAC Linux Driver
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+
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+Required properties:
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+ - compatible: Has to contain one of the following:
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+ adi,ad5755
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+ adi,ad5755-1
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+ adi,ad5757
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+ adi,ad5735
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+ adi,ad5737
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+
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+ - reg: spi chip select number for the device
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+ - spi-cpha or spi-cpol: is the only modes that is supported
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+
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+Recommended properties:
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+ - spi-max-frequency: Definition as per
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+ Documentation/devicetree/bindings/spi/spi-bus.txt
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+
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+Optional properties:
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+See include/dt-bindings/iio/ad5755.h
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+ - adi,ext-dc-dc-compenstation-resistor: boolean set if the hardware have an
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+ external resistor and thereby bypasses
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+ the internal compensation resistor.
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+ - adi,dc-dc-phase:
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+ Valid values for DC DC Phase control is:
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+ 0: All dc-to-dc converters clock on the same edge.
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+ 1: Channel A and Channel B clock on the same edge,
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+ Channel C and Channel D clock on opposite edges.
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+ 2: Channel A and Channel C clock on the same edge,
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+ Channel B and Channel D clock on opposite edges.
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+ 3: Channel A, Channel B, Channel C, and Channel D
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+ clock 90 degrees out of phase from each other.
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+ - adi,dc-dc-freq-hz:
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+ Valid values for DC DC frequency is [Hz]:
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+ 250000
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+ 410000
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+ 650000
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+ - adi,dc-dc-max-microvolt:
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+ Valid values for the maximum allowed Vboost voltage supplied by
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+ the dc-to-dc converter is:
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+ 23000000
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+ 24500000
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+ 27000000
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+ 29500000
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+
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+Optional for every channel:
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+ - adi,mode:
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+ Valid values for DAC modes is:
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+ 0: 0 V to 5 V voltage range.
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+ 1: 0 V to 10 V voltage range.
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+ 2: Plus minus 5 V voltage range.
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+ 3: Plus minus 10 V voltage range.
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+ 4: 4 mA to 20 mA current range.
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+ 5: 0 mA to 20 mA current range.
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+ 6: 0 mA to 24 mA current range.
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+ - adi,ext-current-sense-resistor: boolean set if the hardware a external
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+ current sense resistor.
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+ - adi,enable-voltage-overrange: boolean enable voltage overrange
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+ - adi,slew: Array of slewrate settings should contain 3 fields:
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+ 1: Should be either 0 or 1 in order to enable or disable slewrate.
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+ 2: Slew rate settings:
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+ Valid values for the slew rate update frequency:
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+ 64000
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+ 32000
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+ 16000
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+ 8000
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+ 4000
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+ 2000
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+ 1000
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+ 500
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+ 250
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+ 125
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+ 64
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+ 32
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+ 16
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+ 8
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+ 4
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+ 0
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+ 3: Slew step size:
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+ Valid values for the step size LSBs:
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+ 1
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+ 2
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+ 4
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+ 16
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+ 32
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+ 64
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+ 128
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+ 256
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+
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+Example:
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+dac@0 {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ compatible = "adi,ad5755";
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+ reg = <0>;
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+ spi-max-frequency = <1000000>;
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+ spi-cpha;
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+ adi,dc-dc-phase = <0>;
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+ adi,dc-dc-freq-hz = <410000>;
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+ adi,dc-dc-max-microvolt = <23000000>;
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+ channel@0 {
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+ reg = <0>;
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+ adi,mode = <4>;
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+ adi,ext-current-sense-resistor;
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+ adi,slew = <0 64000 1>;
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+ };
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+ channel@1 {
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+ reg = <1>;
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+ adi,mode = <4>;
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+ adi,ext-current-sense-resistor;
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+ adi,slew = <0 64000 1>;
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+ };
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+ channel@2 {
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+ reg = <2>;
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+ adi,mode = <4>;
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+ adi,ext-current-sense-resistor;
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+ adi,slew = <0 64000 1>;
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+ };
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+ channel@3 {
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+ reg = <3>;
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+ adi,mode = <4>;
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+ adi,ext-current-sense-resistor;
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+ adi,slew = <0 64000 1>;
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+ };
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+};
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Sean Nyekjaer