drivers/regulator/rt5739-regulator.c - manifest_repos/kernel - Git at Google

 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 /*
  * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
  */

 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/property.h>
 #include <linux/regmap.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/of_regulator.h>

 /* Register definitions */
 #define RT5739_REG_VSEL0             0x00
 #define RT5739_REG_VSEL1             0x01
 #define RT5739_REG_CONTROL1    0x02
 #define RT5739_REG_ID1                   0x03
 #define RT5739_REG_ID2                   0x04
 #define RT5739_REG_MONITOR       0x05
 #define RT5739_REG_CONTROL2    0x06
 #define RT5739_REG_CONTROL4    0x08
 #define RT5739_NUM_REGS		(RT5739_REG_CONTROL4 + 1)

 #define RT5739_VSEL_MASK	GENMASK(7, 0)

 #define RT5739_VSEL0_FPWM_MASK	BIT(0)
 #define RT5739_VSEL1_FPWM_MASK	BIT(1)

 #define RT5739_UP_RAMP_DELAY_MASK	GENMASK(6, 4)
 #define RT5739_UP_RAMP_DELAY_SHIFT	4

 #define RT5739_DN_RAMP_DELAY_MASK	GENMASK(7, 5)
 #define RT5739_DN_RAMP_DELAY_SHIFT	5

 #define RT5739_RAMP_DELAY_24000UV_PER_US     0x0
 #define RT5739_RAMP_DELAY_12000UV_PER_US     0x1
 #define RT5739_RAMP_DELAY_6000UV_PER_US       0x2
 #define RT5739_RAMP_DELAY_3000UV_PER_US       0x3
 #define RT5739_RAMP_DELAY_1500UV_PER_US       0x4
 #define RT5739_RAMP_DELAY_750UV_PER_US         0x5
 #define RT5739_RAMP_DELAY_375UV_PER_US         0x6
 #define RT5739_RAMP_DELAY_187UV_PER_US         0x7

 /* Output voltage settings */
 #define RT5739_VOUT_MINUV	300000
 #define RT5739_VOUT_MAXUV	1300000
 #define RT5739_VOUT_STPUV	5000
 #define RT5739_N_VOUTS		((RT5739_VOUT_MAXUV - RT5739_VOUT_MINUV) / RT5739_VOUT_STPUV + 1)

 #define RT5739_MODE_AUTO	0
 #define RT5739_MODE_FORCED_PWM	1

 struct rt5739_priv {
 	struct regulator_desc desc;
 	struct regmap *regmap;
 };

 static int rt5739_dcdc_get_voltage_sel(struct regulator_dev *rdev)
 {
 	struct rt5739_priv *priv = rdev_get_drvdata(rdev);
 	unsigned int data = 0;
 	unsigned int vsel_reg;
 	int ret;

 	if (priv->desc.vsel_reg == RT5739_REG_VSEL0)
 		vsel_reg = RT5739_REG_VSEL0;
 	else
 		vsel_reg = RT5739_REG_VSEL1;

 	ret = regmap_read(priv->regmap, vsel_reg, &data);
 	if (ret < 0) {
 		dev_err(&rdev->dev, "%s(): register %d read failed with err %d\n",
 			__func__, vsel_reg, ret);
 		return ret;
 	}

 	return (int)(data & RT5739_VSEL_MASK);
 }

 static int rt5739_dcdc_set_voltage_sel(struct regulator_dev *rdev,
 					 unsigned int selector)
 {
 	struct rt5739_priv *priv = rdev_get_drvdata(rdev);
 	unsigned int vsel_reg;
 	int ret;

 	if (priv->desc.vsel_reg == RT5739_REG_VSEL0)
 		vsel_reg = RT5739_REG_VSEL0;
 	else
 		vsel_reg = RT5739_REG_VSEL1;

 	ret = regmap_update_bits(priv->regmap, vsel_reg,
 		RT5739_VSEL_MASK, selector);

 	if (ret < 0) {
 		dev_err(&rdev->dev, "%s(): register %d update failed with err %d\n",
 			__func__, vsel_reg, ret);
 		return ret;
 	}

 	return ret;
 }

 static unsigned int rt5739_of_map_mode(unsigned int mode)
 {
 	switch (mode) {
 	case RT5739_MODE_AUTO:
 		return REGULATOR_MODE_NORMAL;
 	case RT5739_MODE_FORCED_PWM:
 		return REGULATOR_MODE_FAST;
 	}

 	return REGULATOR_MODE_INVALID;
 }

 static int rt5739_set_mode(struct regulator_dev *rdev, unsigned int mode)
 {
 	struct rt5739_priv *priv = rdev_get_drvdata(rdev);
 	unsigned int mode_mask;
 	unsigned int mode_val;
 	int ret;

 	if (priv->desc.vsel_reg == RT5739_REG_VSEL0)
 		mode_mask = RT5739_VSEL0_FPWM_MASK;
 	else
 		mode_mask = RT5739_VSEL1_FPWM_MASK;

 	switch (mode) {
 	case REGULATOR_MODE_FAST:
 		mode_val = mode_mask;
 		break;
 	case REGULATOR_MODE_NORMAL:
 		mode_val = 0;
 		break;
 	default:
 		dev_err(&rdev->dev, "%s(): mode not supported\n", __func__);
 		return -EINVAL;
 	}

 	ret = regmap_update_bits(priv->regmap, RT5739_REG_CONTROL1, mode_mask, mode_val);
 	if (ret < 0) {
 		dev_err(&rdev->dev, "%s(): register %d update failed with err %d\n",
 			__func__, RT5739_REG_CONTROL1, ret);
 	}
 	return ret;
 }

 static unsigned int rt5739_get_mode(struct regulator_dev *rdev)
 {
 	struct rt5739_priv *priv = rdev_get_drvdata(rdev);
 	unsigned int mode_mask;
 	unsigned int val;
 	int ret;

 	if (priv->desc.vsel_reg == RT5739_REG_VSEL0)
 		mode_mask = RT5739_VSEL0_FPWM_MASK;
 	else
 		mode_mask = RT5739_VSEL1_FPWM_MASK;

 	ret = regmap_read(priv->regmap, RT5739_REG_CONTROL1, &val);
 	if (ret) {
 		dev_err(&rdev->dev, "%s(): register %d read failed with err %d\n",
 			__func__, RT5739_REG_CONTROL1, ret);
 		return ret;
 	}

 	if (val & mode_mask)
 		return REGULATOR_MODE_FAST;
 	else
 		return REGULATOR_MODE_NORMAL;
 }

 static int rt5739_set_ramp_delay(struct regulator_dev *rdev,
 		int ramp_delay)
 {
 	struct rt5739_priv *priv = rdev_get_drvdata(rdev);
 	unsigned int val;
 	int ret;

 	/* Set ramp delay */
 	if (ramp_delay <= 187)
 		val = RT5739_RAMP_DELAY_187UV_PER_US;
 	else if (ramp_delay <= 375)
 		val = RT5739_RAMP_DELAY_375UV_PER_US;
 	else if (ramp_delay <= 750)
 		val = RT5739_RAMP_DELAY_750UV_PER_US;
 	else if (ramp_delay <= 1500)
 		val = RT5739_RAMP_DELAY_1500UV_PER_US;
 	else if (ramp_delay <= 3000)
 		val = RT5739_RAMP_DELAY_3000UV_PER_US;
 	else if (ramp_delay <= 6000)
 		val = RT5739_RAMP_DELAY_6000UV_PER_US;
 	else if (ramp_delay <= 12000)
 		val = RT5739_RAMP_DELAY_12000UV_PER_US;
 	else if (ramp_delay <= 24000)
 		val = RT5739_RAMP_DELAY_24000UV_PER_US;
 	else
 		return -EINVAL;

 	ret = regmap_update_bits(priv->regmap, RT5739_REG_CONTROL1,
 		RT5739_UP_RAMP_DELAY_MASK, (val << RT5739_UP_RAMP_DELAY_SHIFT));
 	if (ret < 0) {
 		dev_err(&rdev->dev, "%s(): register %d update failed with err %d",
 			__func__, RT5739_REG_CONTROL1, ret);
 	}

 	ret = regmap_update_bits(priv->regmap, RT5739_REG_CONTROL2,
 		RT5739_DN_RAMP_DELAY_MASK, (val << RT5739_DN_RAMP_DELAY_SHIFT));
 	if (ret < 0) {
 		dev_err(&rdev->dev, "%s(): register %d update failed with err %d",
 			__func__, RT5739_REG_CONTROL2, ret);
 	}

 	return ret;
 }

 static const struct regulator_ops rt5739_regulator_ops = {
 	.list_voltage = regulator_list_voltage_linear,
 	.get_voltage_sel	= rt5739_dcdc_get_voltage_sel,
 	.set_voltage_sel	= rt5739_dcdc_set_voltage_sel,
 	.set_mode = rt5739_set_mode,
 	.get_mode = rt5739_get_mode,
 	.set_ramp_delay		= rt5739_set_ramp_delay,
 };

 static bool rt5739_is_accessible_reg(struct device *dev, unsigned int reg)
 {
 	if (reg >= RT5739_REG_VSEL0 && reg <= RT5739_REG_CONTROL4)
 		return true;
 	return false;
 }

 static bool rt5739_is_volatile_reg(struct device *dev, unsigned int reg)
 {
 	if (reg == RT5739_REG_MONITOR)
 		return true;
 	return false;
 }

 static const struct regmap_config rt5739_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 	.max_register = RT5739_REG_CONTROL4,
 	.cache_type = REGCACHE_RBTREE,

 	.writeable_reg = rt5739_is_accessible_reg,
 	.readable_reg = rt5739_is_accessible_reg,
 	.volatile_reg = rt5739_is_volatile_reg,
 };

 static int rt5739_probe(struct i2c_client *i2c)
 {
 	struct rt5739_priv *priv;
 	struct regulator_config regulator_cfg = {};
 	struct regulator_dev *rdev;
 	bool vsel_active_low;
 	int ret;

 	priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	vsel_active_low = device_property_present(&i2c->dev, "richtek,vsel-active-low");
 	priv->regmap = devm_regmap_init_i2c(i2c, &rt5739_regmap_config);
 	if (IS_ERR(priv->regmap)) {
 		ret = PTR_ERR(priv->regmap);
 		dev_err(&i2c->dev, "Failed to init regmap (%d)\n", ret);
 		return ret;
 	}

 	priv->desc.name = "rt5739-regulator";
 	priv->desc.type = REGULATOR_VOLTAGE;
 	priv->desc.owner = THIS_MODULE;
 	priv->desc.min_uV = RT5739_VOUT_MINUV;
 	priv->desc.uV_step = RT5739_VOUT_STPUV;

 	if (vsel_active_low)
 		priv->desc.vsel_reg = RT5739_REG_VSEL0;
 	else
 		priv->desc.vsel_reg = RT5739_REG_VSEL1;
 	//priv->desc.vsel_mask = RT5739_VSEL_MASK;
 	priv->desc.n_voltages = RT5739_N_VOUTS;
 	priv->desc.of_map_mode = rt5739_of_map_mode;
 	priv->desc.ops = &rt5739_regulator_ops;

 	regulator_cfg.dev = &i2c->dev;
 	regulator_cfg.of_node = i2c->dev.of_node;
 	regulator_cfg.regmap = priv->regmap;
 	regulator_cfg.driver_data = priv;
 	regulator_cfg.init_data = of_get_regulator_init_data(&i2c->dev, i2c->dev.of_node,
 	 &priv->desc);

 	rdev = devm_regulator_register(&i2c->dev, &priv->desc, &regulator_cfg);
 	if (IS_ERR(rdev)) {
 		dev_err(&i2c->dev, "%s():Failed to register regulator\n", __func__);
 		return PTR_ERR(rdev);
 	}

 	return 0;
 }

 static const struct of_device_id __maybe_unused rt5739_of_match_table[] = {
 	{ .compatible = "richtek,rt5739", },
 	{}
 };
 MODULE_DEVICE_TABLE(of, rt5739_of_match_table);

 static struct i2c_driver rt5739_driver = {
 	.driver = {
 		.name = "rt5739",
 		.of_match_table = rt5739_of_match_table,
 	},
 	.probe_new = rt5739_probe,
 };
 module_i2c_driver(rt5739_driver);

 MODULE_AUTHOR("Edward Ho <Edward.Ho@amlogic.com>");
 MODULE_DESCRIPTION("rt5739 voltage regulator driver");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
	/*
	* Copyright (c) 2019 Amlogic, Inc. All rights reserved.
	*/

	#include <linux/delay.h>
	#include <linux/gpio/consumer.h>
	#include <linux/i2c.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/property.h>
	#include <linux/regmap.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/of_regulator.h>

	/* Register definitions */
	#define RT5739_REG_VSEL0 0x00
	#define RT5739_REG_VSEL1 0x01
	#define RT5739_REG_CONTROL1 0x02
	#define RT5739_REG_ID1 0x03
	#define RT5739_REG_ID2 0x04
	#define RT5739_REG_MONITOR 0x05
	#define RT5739_REG_CONTROL2 0x06
	#define RT5739_REG_CONTROL4 0x08
	#define RT5739_NUM_REGS (RT5739_REG_CONTROL4 + 1)

	#define RT5739_VSEL_MASK GENMASK(7, 0)

	#define RT5739_VSEL0_FPWM_MASK BIT(0)
	#define RT5739_VSEL1_FPWM_MASK BIT(1)

	#define RT5739_UP_RAMP_DELAY_MASK GENMASK(6, 4)
	#define RT5739_UP_RAMP_DELAY_SHIFT 4

	#define RT5739_DN_RAMP_DELAY_MASK GENMASK(7, 5)
	#define RT5739_DN_RAMP_DELAY_SHIFT 5

	#define RT5739_RAMP_DELAY_24000UV_PER_US 0x0
	#define RT5739_RAMP_DELAY_12000UV_PER_US 0x1
	#define RT5739_RAMP_DELAY_6000UV_PER_US 0x2
	#define RT5739_RAMP_DELAY_3000UV_PER_US 0x3
	#define RT5739_RAMP_DELAY_1500UV_PER_US 0x4
	#define RT5739_RAMP_DELAY_750UV_PER_US 0x5
	#define RT5739_RAMP_DELAY_375UV_PER_US 0x6
	#define RT5739_RAMP_DELAY_187UV_PER_US 0x7

	/* Output voltage settings */
	#define RT5739_VOUT_MINUV 300000
	#define RT5739_VOUT_MAXUV 1300000
	#define RT5739_VOUT_STPUV 5000
	#define RT5739_N_VOUTS ((RT5739_VOUT_MAXUV - RT5739_VOUT_MINUV) / RT5739_VOUT_STPUV + 1)

	#define RT5739_MODE_AUTO 0
	#define RT5739_MODE_FORCED_PWM 1

	struct rt5739_priv {
	struct regulator_desc desc;
	struct regmap *regmap;
	};

	static int rt5739_dcdc_get_voltage_sel(struct regulator_dev *rdev)
	{
	struct rt5739_priv *priv = rdev_get_drvdata(rdev);
	unsigned int data = 0;
	unsigned int vsel_reg;
	int ret;

	if (priv->desc.vsel_reg == RT5739_REG_VSEL0)
	vsel_reg = RT5739_REG_VSEL0;
	else
	vsel_reg = RT5739_REG_VSEL1;

	ret = regmap_read(priv->regmap, vsel_reg, &data);
	if (ret < 0) {
	dev_err(&rdev->dev, "%s(): register %d read failed with err %d\n",
	__func__, vsel_reg, ret);
	return ret;
	}

	return (int)(data & RT5739_VSEL_MASK);
	}

	static int rt5739_dcdc_set_voltage_sel(struct regulator_dev *rdev,
	unsigned int selector)
	{
	struct rt5739_priv *priv = rdev_get_drvdata(rdev);
	unsigned int vsel_reg;
	int ret;

	if (priv->desc.vsel_reg == RT5739_REG_VSEL0)
	vsel_reg = RT5739_REG_VSEL0;
	else
	vsel_reg = RT5739_REG_VSEL1;

	ret = regmap_update_bits(priv->regmap, vsel_reg,
	RT5739_VSEL_MASK, selector);

	if (ret < 0) {
	dev_err(&rdev->dev, "%s(): register %d update failed with err %d\n",
	__func__, vsel_reg, ret);
	return ret;
	}

	return ret;
	}

	static unsigned int rt5739_of_map_mode(unsigned int mode)
	{
	switch (mode) {
	case RT5739_MODE_AUTO:
	return REGULATOR_MODE_NORMAL;
	case RT5739_MODE_FORCED_PWM:
	return REGULATOR_MODE_FAST;
	}

	return REGULATOR_MODE_INVALID;
	}

	static int rt5739_set_mode(struct regulator_dev *rdev, unsigned int mode)
	{
	struct rt5739_priv *priv = rdev_get_drvdata(rdev);
	unsigned int mode_mask;
	unsigned int mode_val;
	int ret;

	if (priv->desc.vsel_reg == RT5739_REG_VSEL0)
	mode_mask = RT5739_VSEL0_FPWM_MASK;
	else
	mode_mask = RT5739_VSEL1_FPWM_MASK;

	switch (mode) {
	case REGULATOR_MODE_FAST:
	mode_val = mode_mask;
	break;
	case REGULATOR_MODE_NORMAL:
	mode_val = 0;
	break;
	default:
	dev_err(&rdev->dev, "%s(): mode not supported\n", __func__);
	return -EINVAL;
	}

	ret = regmap_update_bits(priv->regmap, RT5739_REG_CONTROL1, mode_mask, mode_val);
	if (ret < 0) {
	dev_err(&rdev->dev, "%s(): register %d update failed with err %d\n",
	__func__, RT5739_REG_CONTROL1, ret);
	}
	return ret;
	}

	static unsigned int rt5739_get_mode(struct regulator_dev *rdev)
	{
	struct rt5739_priv *priv = rdev_get_drvdata(rdev);
	unsigned int mode_mask;
	unsigned int val;
	int ret;

	if (priv->desc.vsel_reg == RT5739_REG_VSEL0)
	mode_mask = RT5739_VSEL0_FPWM_MASK;
	else
	mode_mask = RT5739_VSEL1_FPWM_MASK;

	ret = regmap_read(priv->regmap, RT5739_REG_CONTROL1, &val);
	if (ret) {
	dev_err(&rdev->dev, "%s(): register %d read failed with err %d\n",
	__func__, RT5739_REG_CONTROL1, ret);
	return ret;
	}

	if (val & mode_mask)
	return REGULATOR_MODE_FAST;
	else
	return REGULATOR_MODE_NORMAL;
	}

	static int rt5739_set_ramp_delay(struct regulator_dev *rdev,
	int ramp_delay)
	{
	struct rt5739_priv *priv = rdev_get_drvdata(rdev);
	unsigned int val;
	int ret;

	/* Set ramp delay */
	if (ramp_delay <= 187)
	val = RT5739_RAMP_DELAY_187UV_PER_US;
	else if (ramp_delay <= 375)
	val = RT5739_RAMP_DELAY_375UV_PER_US;
	else if (ramp_delay <= 750)
	val = RT5739_RAMP_DELAY_750UV_PER_US;
	else if (ramp_delay <= 1500)
	val = RT5739_RAMP_DELAY_1500UV_PER_US;
	else if (ramp_delay <= 3000)
	val = RT5739_RAMP_DELAY_3000UV_PER_US;
	else if (ramp_delay <= 6000)
	val = RT5739_RAMP_DELAY_6000UV_PER_US;
	else if (ramp_delay <= 12000)
	val = RT5739_RAMP_DELAY_12000UV_PER_US;
	else if (ramp_delay <= 24000)
	val = RT5739_RAMP_DELAY_24000UV_PER_US;
	else
	return -EINVAL;

	ret = regmap_update_bits(priv->regmap, RT5739_REG_CONTROL1,
	RT5739_UP_RAMP_DELAY_MASK, (val << RT5739_UP_RAMP_DELAY_SHIFT));
	if (ret < 0) {
	dev_err(&rdev->dev, "%s(): register %d update failed with err %d",
	__func__, RT5739_REG_CONTROL1, ret);
	}

	ret = regmap_update_bits(priv->regmap, RT5739_REG_CONTROL2,
	RT5739_DN_RAMP_DELAY_MASK, (val << RT5739_DN_RAMP_DELAY_SHIFT));
	if (ret < 0) {
	dev_err(&rdev->dev, "%s(): register %d update failed with err %d",
	__func__, RT5739_REG_CONTROL2, ret);
	}

	return ret;
	}

	static const struct regulator_ops rt5739_regulator_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.get_voltage_sel = rt5739_dcdc_get_voltage_sel,
	.set_voltage_sel = rt5739_dcdc_set_voltage_sel,
	.set_mode = rt5739_set_mode,
	.get_mode = rt5739_get_mode,
	.set_ramp_delay = rt5739_set_ramp_delay,
	};

	static bool rt5739_is_accessible_reg(struct device *dev, unsigned int reg)
	{
	if (reg >= RT5739_REG_VSEL0 && reg <= RT5739_REG_CONTROL4)
	return true;
	return false;
	}

	static bool rt5739_is_volatile_reg(struct device *dev, unsigned int reg)
	{
	if (reg == RT5739_REG_MONITOR)
	return true;
	return false;
	}

	static const struct regmap_config rt5739_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = RT5739_REG_CONTROL4,
	.cache_type = REGCACHE_RBTREE,

	.writeable_reg = rt5739_is_accessible_reg,
	.readable_reg = rt5739_is_accessible_reg,
	.volatile_reg = rt5739_is_volatile_reg,
	};

	static int rt5739_probe(struct i2c_client *i2c)
	{
	struct rt5739_priv *priv;
	struct regulator_config regulator_cfg = {};
	struct regulator_dev *rdev;
	bool vsel_active_low;
	int ret;

	priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	vsel_active_low = device_property_present(&i2c->dev, "richtek,vsel-active-low");
	priv->regmap = devm_regmap_init_i2c(i2c, &rt5739_regmap_config);
	if (IS_ERR(priv->regmap)) {
	ret = PTR_ERR(priv->regmap);
	dev_err(&i2c->dev, "Failed to init regmap (%d)\n", ret);
	return ret;
	}

	priv->desc.name = "rt5739-regulator";
	priv->desc.type = REGULATOR_VOLTAGE;
	priv->desc.owner = THIS_MODULE;
	priv->desc.min_uV = RT5739_VOUT_MINUV;
	priv->desc.uV_step = RT5739_VOUT_STPUV;

	if (vsel_active_low)
	priv->desc.vsel_reg = RT5739_REG_VSEL0;
	else
	priv->desc.vsel_reg = RT5739_REG_VSEL1;
	//priv->desc.vsel_mask = RT5739_VSEL_MASK;
	priv->desc.n_voltages = RT5739_N_VOUTS;
	priv->desc.of_map_mode = rt5739_of_map_mode;
	priv->desc.ops = &rt5739_regulator_ops;

	regulator_cfg.dev = &i2c->dev;
	regulator_cfg.of_node = i2c->dev.of_node;
	regulator_cfg.regmap = priv->regmap;
	regulator_cfg.driver_data = priv;
	regulator_cfg.init_data = of_get_regulator_init_data(&i2c->dev, i2c->dev.of_node,
	&priv->desc);

	rdev = devm_regulator_register(&i2c->dev, &priv->desc, &regulator_cfg);
	if (IS_ERR(rdev)) {
	dev_err(&i2c->dev, "%s():Failed to register regulator\n", __func__);
	return PTR_ERR(rdev);
	}

	return 0;
	}

	static const struct of_device_id __maybe_unused rt5739_of_match_table[] = {
	{ .compatible = "richtek,rt5739", },
	{}
	};
	MODULE_DEVICE_TABLE(of, rt5739_of_match_table);

	static struct i2c_driver rt5739_driver = {
	.driver = {
	.name = "rt5739",
	.of_match_table = rt5739_of_match_table,
	},
	.probe_new = rt5739_probe,
	};
	module_i2c_driver(rt5739_driver);

	MODULE_AUTHOR("Edward Ho <Edward.Ho@amlogic.com>");
	MODULE_DESCRIPTION("rt5739 voltage regulator driver");
	MODULE_LICENSE("GPL v2");