Merge remote-tracking branches 'regulator/topic/act8865', 'regulator/topic/act8945a', 'regulator/topic/axp20x' and 'regulator/topic/cs4271' into regulator-next

Documentation/devicetree/bindings/regulator/act8945a-regulator.txt

@@ -0,0 +1,80 @@
+Device-Tree bindings for regulators of Active-semi ACT8945A Multi-Function Device
+
+Required properties:
+ - compatible: "active-semi,act8945a", please refer to ../mfd/act8945a.txt.
+
+Optional properties:
+- active-semi,vsel-high: Indicates if the VSEL pin is set to logic-high.
+  If this property is missing, assume the VSEL pin is set to logic-low.
+
+Optional input supply properties:
+  - vp1-supply: The input supply for REG_DCDC1
+  - vp2-supply: The input supply for REG_DCDC2
+  - vp3-supply: The input supply for REG_DCDC3
+  - inl45-supply: The input supply for REG_LDO1 and REG_LDO2
+  - inl67-supply: The input supply for REG_LDO3 and REG_LDO4
+
+Any standard regulator properties can be used to configure the single regulator.
+
+The valid names for regulators are:
+	REG_DCDC1, REG_DCDC2, REG_DCDC3, REG_LDO1, REG_LDO2, REG_LDO3, REG_LDO4.
+
+Example:
+	pmic@5b {
+		compatible = "active-semi,act8945a";
+		reg = <0x5b>;
+		status = "okay";
+
+		active-semi,vsel-high;
+
+		regulators {
+			vdd_1v35_reg: REG_DCDC1 {
+				regulator-name = "VDD_1V35";
+				regulator-min-microvolt = <1350000>;
+				regulator-max-microvolt = <1350000>;
+				regulator-always-on;
+			};
+
+			vdd_1v2_reg: REG_DCDC2 {
+				regulator-name = "VDD_1V2";
+				regulator-min-microvolt = <1100000>;
+				regulator-max-microvolt = <1300000>;
+				regulator-always-on;
+			};
+
+			vdd_3v3_reg: REG_DCDC3 {
+				regulator-name = "VDD_3V3";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+			};
+
+			vdd_fuse_reg: REG_LDO1 {
+				regulator-name = "VDD_FUSE";
+				regulator-min-microvolt = <2500000>;
+				regulator-max-microvolt = <2500000>;
+				regulator-always-on;
+			};
+
+			vdd_3v3_lp_reg: REG_LDO2 {
+				regulator-name = "VDD_3V3_LP";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+			};
+
+			vdd_led_reg: REG_LDO3 {
+				regulator-name = "VDD_LED";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+			};
+
+			vdd_sdhc_1v8_reg: REG_LDO4 {
+				regulator-name = "VDD_SDHC_1V8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+			};
+		};
+	};

Documentation/devicetree/bindings/sound/cs4271.txt

@@ -33,12 +33,19 @@ Optional properties:
 	Note that this is not needed in case the clocks are stable
 	throughout the entire runtime of the codec.
 
+ - vd-supply:	Digital power
+ - vl-supply:	Logic power
+ - va-supply:	Analog Power
+
 Examples:
 
 	codec_i2c: cs4271@10 {
 		compatible = "cirrus,cs4271";
 		reg = <0x10>;
 		reset-gpio = <&gpio 23 0>;
+		vd-supply = <&vdd_3v3_reg>;
+		vl-supply = <&vdd_3v3_reg>;
+		va-supply = <&vdd_3v3_reg>;
 	};
 
 	codec_spi: cs4271@0 {

drivers/regulator/Kconfig

@@ -78,6 +78,15 @@ config REGULATOR_ACT8865
 	  This driver controls a active-semi act8865 voltage output
 	  regulator via I2C bus.
 
+config REGULATOR_ACT8945A
+	tristate "Active-semi ACT8945A voltage regulator"
+	depends on MFD_ACT8945A
+	help
+	  This driver controls a active-semi ACT8945A voltage regulator
+	  via I2C bus. The ACT8945A features three step-down DC/DC converters
+	  and four low-dropout linear regulators, along with a ActivePath
+	  battery charger.
+
 config REGULATOR_AD5398
 	tristate "Analog Devices AD5398/AD5821 regulators"
 	depends on I2C

drivers/regulator/Makefile

@@ -15,6 +15,7 @@ obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o
 obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o
 obj-$(CONFIG_REGULATOR_AB8500)	+= ab8500-ext.o ab8500.o
 obj-$(CONFIG_REGULATOR_ACT8865) += act8865-regulator.o
+obj-$(CONFIG_REGULATOR_ACT8945A) += act8945a-regulator.o
 obj-$(CONFIG_REGULATOR_AD5398) += ad5398.o
 obj-$(CONFIG_REGULATOR_ANATOP) += anatop-regulator.o
 obj-$(CONFIG_REGULATOR_ARIZONA) += arizona-micsupp.o arizona-ldo1.o

drivers/regulator/act8865-regulator.c

@@ -218,7 +218,7 @@ static const struct regulator_desc act8600_regulators[] = {
 		.ops = &act8865_ldo_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = 1,
-		.fixed_uV = 1800000,
+		.fixed_uV = 3300000,
 		.enable_reg = ACT8600_LDO910_CTRL,
 		.enable_mask = ACT8865_ENA,
 		.owner = THIS_MODULE,
@@ -369,7 +369,7 @@ static int act8865_pdata_from_dt(struct device *dev,
 	for (i = 0; i < num_matches; i++) {
 		regulator->id = i;
 		regulator->name = matches[i].name;
-		regulator->platform_data = matches[i].init_data;
+		regulator->init_data = matches[i].init_data;
 		of_node[i] = matches[i].of_node;
 		regulator++;
 	}
@@ -396,7 +396,7 @@ static struct regulator_init_data
 
 	for (i = 0; i < pdata->num_regulators; i++) {
 		if (pdata->regulators[i].id == id)
-			return pdata->regulators[i].platform_data;
+			return pdata->regulators[i].init_data;
 	}
 
 	return NULL;
@@ -415,7 +415,7 @@ static void act8865_power_off(void)
 static int act8865_pmic_probe(struct i2c_client *client,
 			      const struct i2c_device_id *i2c_id)
 {
-	static const struct regulator_desc *regulators;
+	const struct regulator_desc *regulators;
 	struct act8865_platform_data pdata_of, *pdata;
 	struct device *dev = &client->dev;
 	struct device_node **of_node;

drivers/regulator/act8945a-regulator.c

@@ -0,0 +1,165 @@
+/*
+ * Voltage regulation driver for active-semi ACT8945A PMIC
+ *
+ * Copyright (C) 2015 Atmel Corporation
+ *
+ * Author: Wenyou Yang <wenyou.yang@atmel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+
+/**
+ * ACT8945A Global Register Map.
+ */
+#define ACT8945A_SYS_MODE	0x00
+#define ACT8945A_SYS_CTRL	0x01
+#define ACT8945A_DCDC1_VSET1	0x20
+#define ACT8945A_DCDC1_VSET2	0x21
+#define ACT8945A_DCDC1_CTRL	0x22
+#define ACT8945A_DCDC2_VSET1	0x30
+#define ACT8945A_DCDC2_VSET2	0x31
+#define ACT8945A_DCDC2_CTRL	0x32
+#define ACT8945A_DCDC3_VSET1	0x40
+#define ACT8945A_DCDC3_VSET2	0x41
+#define ACT8945A_DCDC3_CTRL	0x42
+#define ACT8945A_LDO1_VSET	0x50
+#define ACT8945A_LDO1_CTRL	0x51
+#define ACT8945A_LDO2_VSET	0x54
+#define ACT8945A_LDO2_CTRL	0x55
+#define ACT8945A_LDO3_VSET	0x60
+#define ACT8945A_LDO3_CTRL	0x61
+#define ACT8945A_LDO4_VSET	0x64
+#define ACT8945A_LDO4_CTRL	0x65
+
+/**
+ * Field Definitions.
+ */
+#define ACT8945A_ENA		0x80	/* ON - [7] */
+#define ACT8945A_VSEL_MASK	0x3F	/* VSET - [5:0] */
+
+/**
+ * ACT8945A Voltage Number
+ */
+#define ACT8945A_VOLTAGE_NUM	64
+
+enum {
+	ACT8945A_ID_DCDC1,
+	ACT8945A_ID_DCDC2,
+	ACT8945A_ID_DCDC3,
+	ACT8945A_ID_LDO1,
+	ACT8945A_ID_LDO2,
+	ACT8945A_ID_LDO3,
+	ACT8945A_ID_LDO4,
+	ACT8945A_REG_NUM,
+};
+
+static const struct regulator_linear_range act8945a_voltage_ranges[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
+	REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
+	REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
+};
+
+static struct regulator_ops act8945a_ops = {
+	.list_voltage		= regulator_list_voltage_linear_range,
+	.map_voltage		= regulator_map_voltage_linear_range,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.is_enabled		= regulator_is_enabled_regmap,
+};
+
+#define ACT89xx_REG(_name, _family, _id, _vsel_reg, _supply)		\
+	[_family##_ID_##_id] = {					\
+		.name			= _name,			\
+		.supply_name		= _supply,			\
+		.of_match		= of_match_ptr("REG_"#_id),	\
+		.regulators_node	= of_match_ptr("regulators"),	\
+		.id			= _family##_ID_##_id,		\
+		.type			= REGULATOR_VOLTAGE,		\
+		.ops			= &act8945a_ops,		\
+		.n_voltages		= ACT8945A_VOLTAGE_NUM,		\
+		.linear_ranges		= act8945a_voltage_ranges,	\
+		.n_linear_ranges	= ARRAY_SIZE(act8945a_voltage_ranges), \
+		.vsel_reg		= _family##_##_id##_##_vsel_reg, \
+		.vsel_mask		= ACT8945A_VSEL_MASK,		\
+		.enable_reg		= _family##_##_id##_CTRL,	\
+		.enable_mask		= ACT8945A_ENA,			\
+		.owner			= THIS_MODULE,			\
+	}
+
+static const struct regulator_desc act8945a_regulators[] = {
+	ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET1, "vp1"),
+	ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET1, "vp2"),
+	ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET1, "vp3"),
+	ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"),
+	ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"),
+	ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"),
+	ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"),
+};
+
+static const struct regulator_desc act8945a_alt_regulators[] = {
+	ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET2, "vp1"),
+	ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET2, "vp2"),
+	ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET2, "vp3"),
+	ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"),
+	ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"),
+	ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"),
+	ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"),
+};
+
+static int act8945a_pmic_probe(struct platform_device *pdev)
+{
+	struct regulator_config config = { };
+	const struct regulator_desc *regulators;
+	struct regulator_dev *rdev;
+	int i, num_regulators;
+	bool voltage_select;
+
+	voltage_select = of_property_read_bool(pdev->dev.parent->of_node,
+					       "active-semi,vsel-high");
+
+	if (voltage_select) {
+		regulators = act8945a_alt_regulators;
+		num_regulators = ARRAY_SIZE(act8945a_alt_regulators);
+	} else {
+		regulators = act8945a_regulators;
+		num_regulators = ARRAY_SIZE(act8945a_regulators);
+	}
+
+	config.dev = &pdev->dev;
+	config.dev->of_node = pdev->dev.parent->of_node;
+	for (i = 0; i < num_regulators; i++) {
+		rdev = devm_regulator_register(&pdev->dev, &regulators[i], &config);
+		if (IS_ERR(rdev)) {
+			dev_err(&pdev->dev,
+				"failed to register %s regulator\n",
+				regulators[i].name);
+			return PTR_ERR(rdev);
+		}
+	}
+
+	return 0;
+}
+
+static struct platform_driver act8945a_pmic_driver = {
+	.driver = {
+		.name = "act8945a-regulator",
+	},
+	.probe = act8945a_pmic_probe,
+};
+module_platform_driver(act8945a_pmic_driver);
+
+MODULE_DESCRIPTION("Active-semi ACT8945A voltage regulator driver");
+MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
+MODULE_LICENSE("GPL");

drivers/regulator/axp20x-regulator.c

@@ -39,7 +39,7 @@
 #define AXP_DESC_IO(_family, _id, _match, _supply, _min, _max, _step, _vreg,	\
 		    _vmask, _ereg, _emask, _enable_val, _disable_val)		\
 	[_family##_##_id] = {							\
-		.name		= #_id,						\
+		.name		= (_match),					\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
@@ -61,7 +61,7 @@
 #define AXP_DESC(_family, _id, _match, _supply, _min, _max, _step, _vreg,	\
 		 _vmask, _ereg, _emask) 					\
 	[_family##_##_id] = {							\
-		.name		= #_id,						\
+		.name		= (_match),					\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
@@ -78,21 +78,15 @@
 		.ops		= &axp20x_ops,					\
 	}
 
-#define AXP_DESC_SW(_family, _id, _match, _supply, _min, _max, _step, _vreg,	\
-		    _vmask, _ereg, _emask) 					\
+#define AXP_DESC_SW(_family, _id, _match, _supply, _ereg, _emask)		\
 	[_family##_##_id] = {							\
-		.name		= #_id,						\
+		.name		= (_match),					\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
 		.type		= REGULATOR_VOLTAGE,				\
 		.id		= _family##_##_id,				\
-		.n_voltages	= (((_max) - (_min)) / (_step) + 1),		\
 		.owner		= THIS_MODULE,					\
-		.min_uV		= (_min) * 1000,				\
-		.uV_step	= (_step) * 1000,				\
-		.vsel_reg	= (_vreg),					\
-		.vsel_mask	= (_vmask),					\
 		.enable_reg	= (_ereg),					\
 		.enable_mask	= (_emask),					\
 		.ops		= &axp20x_ops_sw,				\
@@ -100,7 +94,7 @@
 
 #define AXP_DESC_FIXED(_family, _id, _match, _supply, _volt)			\
 	[_family##_##_id] = {							\
-		.name		= #_id,						\
+		.name		= (_match),					\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
@@ -112,39 +106,34 @@
 		.ops		= &axp20x_ops_fixed				\
 	}
 
-#define AXP_DESC_TABLE(_family, _id, _match, _supply, _table, _vreg, _vmask,	\
-		       _ereg, _emask)						\
+#define AXP_DESC_RANGES(_family, _id, _match, _supply, _ranges, _n_voltages,	\
+			_vreg, _vmask, _ereg, _emask)				\
 	[_family##_##_id] = {							\
-		.name		= #_id,						\
+		.name		= (_match),					\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
 		.type		= REGULATOR_VOLTAGE,				\
 		.id		= _family##_##_id,				\
-		.n_voltages	= ARRAY_SIZE(_table),				\
+		.n_voltages	= (_n_voltages),				\
 		.owner		= THIS_MODULE,					\
 		.vsel_reg	= (_vreg),					\
 		.vsel_mask	= (_vmask),					\
 		.enable_reg	= (_ereg),					\
 		.enable_mask	= (_emask),					\
-		.volt_table	= (_table),					\
-		.ops		= &axp20x_ops_table,				\
+		.linear_ranges	= (_ranges),					\
+		.n_linear_ranges = ARRAY_SIZE(_ranges),				\
+		.ops		= &axp20x_ops_range,				\
 	}
 
-static const int axp20x_ldo4_data[] = { 1250000, 1300000, 1400000, 1500000, 1600000,
-					1700000, 1800000, 1900000, 2000000, 2500000,
-					2700000, 2800000, 3000000, 3100000, 3200000,
-					3300000 };
-
 static struct regulator_ops axp20x_ops_fixed = {
 	.list_voltage		= regulator_list_voltage_linear,
 };
 
-static struct regulator_ops axp20x_ops_table = {
+static struct regulator_ops axp20x_ops_range = {
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
-	.list_voltage		= regulator_list_voltage_table,
-	.map_voltage		= regulator_map_voltage_ascend,
+	.list_voltage		= regulator_list_voltage_linear_range,
 	.enable			= regulator_enable_regmap,
 	.disable		= regulator_disable_regmap,
 	.is_enabled		= regulator_is_enabled_regmap,
@@ -160,13 +149,17 @@ static struct regulator_ops axp20x_ops = {
 };
 
 static struct regulator_ops axp20x_ops_sw = {
-	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
-	.list_voltage		= regulator_list_voltage_linear,
 	.enable			= regulator_enable_regmap,
 	.disable		= regulator_disable_regmap,
 	.is_enabled		= regulator_is_enabled_regmap,
 };
 
+static const struct regulator_linear_range axp20x_ldo4_ranges[] = {
+	REGULATOR_LINEAR_RANGE(1250000, 0x0, 0x0, 0),
+	REGULATOR_LINEAR_RANGE(1300000, 0x1, 0x8, 100000),
+	REGULATOR_LINEAR_RANGE(2500000, 0x9, 0xf, 100000),
+};
+
 static const struct regulator_desc axp20x_regulators[] = {
 	AXP_DESC(AXP20X, DCDC2, "dcdc2", "vin2", 700, 2275, 25,
 		 AXP20X_DCDC2_V_OUT, 0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
@@ -177,8 +170,9 @@ static const struct regulator_desc axp20x_regulators[] = {
 		 AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
 	AXP_DESC(AXP20X, LDO3, "ldo3", "ldo3in", 700, 3500, 25,
 		 AXP20X_LDO3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
-	AXP_DESC_TABLE(AXP20X, LDO4, "ldo4", "ldo24in", axp20x_ldo4_data,
-		       AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 0x08),
+	AXP_DESC_RANGES(AXP20X, LDO4, "ldo4", "ldo24in", axp20x_ldo4_ranges,
+			16, AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL,
+			0x08),
 	AXP_DESC_IO(AXP20X, LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
 		    AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
 		    AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
@@ -196,8 +190,8 @@ static const struct regulator_desc axp22x_regulators[] = {
 	AXP_DESC(AXP22X, DCDC5, "dcdc5", "vin5", 1000, 2550, 50,
 		 AXP22X_DCDC5_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(5)),
 	/* secondary switchable output of DCDC1 */
-	AXP_DESC_SW(AXP22X, DC1SW, "dc1sw", NULL, 1600, 3400, 100,
-		    AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(7)),
+	AXP_DESC_SW(AXP22X, DC1SW, "dc1sw", NULL, AXP22X_PWR_OUT_CTRL2,
+		    BIT(7)),
 	/* LDO regulator internally chained to DCDC5 */
 	AXP_DESC(AXP22X, DC5LDO, "dc5ldo", NULL, 700, 1400, 100,
 		 AXP22X_DC5LDO_V_OUT, 0x7, AXP22X_PWR_OUT_CTRL1, BIT(0)),

include/linux/regulator/act8865.h

@@ -68,12 +68,12 @@ enum {
  * act8865_regulator_data - regulator data
  * @id: regulator id
  * @name: regulator name
- * @platform_data: regulator init data
+ * @init_data: regulator init data
  */
 struct act8865_regulator_data {
 	int id;
 	const char *name;
-	struct regulator_init_data *platform_data;
+	struct regulator_init_data *init_data;
 };
 
 /**

sound/soc/codecs/cs4271.c

@@ -26,6 +26,7 @@
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/of_gpio.h>
+#include <linux/regulator/consumer.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>
 #include <sound/tlv.h>
@@ -157,6 +158,10 @@ static bool cs4271_volatile_reg(struct device *dev, unsigned int reg)
 	return reg == CS4271_CHIPID;
 }
 
+static const char * const supply_names[] = {
+	"vd", "vl", "va"
+};
+
 struct cs4271_private {
 	unsigned int			mclk;
 	bool				master;
@@ -170,6 +175,7 @@ struct cs4271_private {
 	int				gpio_disable;
 	/* enable soft reset workaround */
 	bool				enable_soft_reset;
+	struct regulator_bulk_data      supplies[ARRAY_SIZE(supply_names)];
 };
 
 static const struct snd_soc_dapm_widget cs4271_dapm_widgets[] = {
@@ -487,6 +493,20 @@ static struct snd_soc_dai_driver cs4271_dai = {
 	.symmetric_rates = 1,
 };
 
+static int cs4271_reset(struct snd_soc_codec *codec)
+{
+	struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
+
+	if (gpio_is_valid(cs4271->gpio_nreset)) {
+		gpio_set_value(cs4271->gpio_nreset, 0);
+		mdelay(1);
+		gpio_set_value(cs4271->gpio_nreset, 1);
+		mdelay(1);
+	}
+
+	return 0;
+}
+
 #ifdef CONFIG_PM
 static int cs4271_soc_suspend(struct snd_soc_codec *codec)
 {
@@ -499,6 +519,9 @@ static int cs4271_soc_suspend(struct snd_soc_codec *codec)
 	if (ret < 0)
 		return ret;
 
+	regcache_mark_dirty(cs4271->regmap);
+	regulator_bulk_disable(ARRAY_SIZE(cs4271->supplies), cs4271->supplies);
+
 	return 0;
 }
 
@@ -507,6 +530,16 @@ static int cs4271_soc_resume(struct snd_soc_codec *codec)
 	int ret;
 	struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
 
+	ret = regulator_bulk_enable(ARRAY_SIZE(cs4271->supplies),
+				    cs4271->supplies);
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to enable regulators: %d\n", ret);
+		return ret;
+	}
+
+	/* Do a proper reset after power up */
+	cs4271_reset(codec);
+
 	/* Restore codec state */
 	ret = regcache_sync(cs4271->regmap);
 	if (ret < 0)
@@ -553,19 +586,24 @@ static int cs4271_codec_probe(struct snd_soc_codec *codec)
 	}
 #endif
 
+	ret = regulator_bulk_enable(ARRAY_SIZE(cs4271->supplies),
+				    cs4271->supplies);
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to enable regulators: %d\n", ret);
+		return ret;
+	}
+
 	if (cs4271plat) {
 		amutec_eq_bmutec = cs4271plat->amutec_eq_bmutec;
 		cs4271->enable_soft_reset = cs4271plat->enable_soft_reset;
 	}
 
-	if (gpio_is_valid(cs4271->gpio_nreset)) {
-		/* Reset codec */
-		gpio_direction_output(cs4271->gpio_nreset, 0);
-		mdelay(1);
-		gpio_set_value(cs4271->gpio_nreset, 1);
-		/* Give the codec time to wake up */
-		mdelay(1);
-	}
+	/* Reset codec */
+	cs4271_reset(codec);
+
+	ret = regcache_sync(cs4271->regmap);
+	if (ret < 0)
+		return ret;
 
 	ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
 				 CS4271_MODE2_PDN | CS4271_MODE2_CPEN,
@@ -595,6 +633,9 @@ static int cs4271_codec_remove(struct snd_soc_codec *codec)
 		/* Set codec to the reset state */
 		gpio_set_value(cs4271->gpio_nreset, 0);
 
+	regcache_mark_dirty(cs4271->regmap);
+	regulator_bulk_disable(ARRAY_SIZE(cs4271->supplies), cs4271->supplies);
+
 	return 0;
 };
 
@@ -617,6 +658,7 @@ static int cs4271_common_probe(struct device *dev,
 {
 	struct cs4271_platform_data *cs4271plat = dev->platform_data;
 	struct cs4271_private *cs4271;
+	int i, ret;
 
 	cs4271 = devm_kzalloc(dev, sizeof(*cs4271), GFP_KERNEL);
 	if (!cs4271)
@@ -638,6 +680,17 @@ static int cs4271_common_probe(struct device *dev,
 			return ret;
 	}
 
+	for (i = 0; i < ARRAY_SIZE(supply_names); i++)
+		cs4271->supplies[i].supply = supply_names[i];
+
+	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(cs4271->supplies),
+					cs4271->supplies);
+
+	if (ret < 0) {
+		dev_err(dev, "Failed to get regulators: %d\n", ret);
+		return ret;
+	}
+
 	*c = cs4271;
 	return 0;
 }