drivers/regulator/ab8500.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright (C) ST-Ericsson SA 2010
  *
  * License Terms: GNU General Public License v2
  *
  * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
  *
  * AB8500 peripheral regulators
  *
  * AB8500 supports the following regulators,
  * LDOs - VAUDIO, VANAMIC2/2, VDIGMIC, VINTCORE12, VTVOUT,
  *        VAUX1/2/3, VANA
  *
  * for DB8500 cut 1.0 and previous versions of the silicon, all accesses
  * to registers are through the DB8500 SPI. In cut 1.1 onwards, these
  * accesses are through the DB8500 PRCMU I2C
  *
  */
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/ab8500.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/ab8500.h>

 /**
  * struct ab8500_regulator_info - ab8500 regulator information
  * @desc: regulator description
  * @ab8500: ab8500 parent
  * @regulator_dev: regulator device
  * @max_uV: maximum voltage (for variable voltage supplies)
  * @min_uV: minimum voltage (for variable voltage supplies)
  * @fixed_uV: typical voltage (for fixed voltage supplies)
  * @update_reg: register to control on/off
  * @mask: mask to enable/disable regulator
  * @enable: bits to enable the regulator in normal(high power) mode
  * @voltage_reg: register to control regulator voltage
  * @voltage_mask: mask to control regulator voltage
  * @supported_voltages: supported voltage table
  * @voltages_len: number of supported voltages for the regulator
  */
 struct ab8500_regulator_info {
 	struct device		*dev;
 	struct regulator_desc	desc;
 	struct ab8500		*ab8500;
 	struct regulator_dev	*regulator;
 	int max_uV;
 	int min_uV;
 	int fixed_uV;
 	int update_reg;
 	int mask;
 	int enable;
 	int voltage_reg;
 	int voltage_mask;
 	int const *supported_voltages;
 	int voltages_len;
 };

 /* voltage tables for the vauxn/vintcore supplies */
 static const int ldo_vauxn_voltages[] = {
 	1100000,
 	1200000,
 	1300000,
 	1400000,
 	1500000,
 	1800000,
 	1850000,
 	1900000,
 	2500000,
 	2650000,
 	2700000,
 	2750000,
 	2800000,
 	2900000,
 	3000000,
 	3300000,
 };

 static const int ldo_vintcore_voltages[] = {
 	1200000,
 	1225000,
 	1250000,
 	1275000,
 	1300000,
 	1325000,
 	1350000,
 };

 static int ab8500_regulator_enable(struct regulator_dev *rdev)
 {
 	int regulator_id, ret;
 	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

 	regulator_id = rdev_get_id(rdev);
 	if (regulator_id >= AB8500_NUM_REGULATORS)
 		return -EINVAL;

 	ret = ab8500_set_bits(info->ab8500, info->update_reg,
 			info->mask, info->enable);
 	if (ret < 0)
 		dev_err(rdev_get_dev(rdev),
 			"couldn't set enable bits for regulator\n");
 	return ret;
 }

 static int ab8500_regulator_disable(struct regulator_dev *rdev)
 {
 	int regulator_id, ret;
 	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

 	regulator_id = rdev_get_id(rdev);
 	if (regulator_id >= AB8500_NUM_REGULATORS)
 		return -EINVAL;

 	ret = ab8500_set_bits(info->ab8500, info->update_reg,
 			info->mask, 0x0);
 	if (ret < 0)
 		dev_err(rdev_get_dev(rdev),
 			"couldn't set disable bits for regulator\n");
 	return ret;
 }

 static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
 {
 	int regulator_id, ret;
 	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

 	regulator_id = rdev_get_id(rdev);
 	if (regulator_id >= AB8500_NUM_REGULATORS)
 		return -EINVAL;

 	ret = ab8500_read(info->ab8500, info->update_reg);
 	if (ret < 0) {
 		dev_err(rdev_get_dev(rdev),
 			"couldn't read 0x%x register\n", info->update_reg);
 		return ret;
 	}

 	if (ret & info->mask)
 		return true;
 	else
 		return false;
 }

 static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector)
 {
 	int regulator_id;
 	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

 	regulator_id = rdev_get_id(rdev);
 	if (regulator_id >= AB8500_NUM_REGULATORS)
 		return -EINVAL;

 	/* return the uV for the fixed regulators */
 	if (info->fixed_uV)
 		return info->fixed_uV;

 	if (selector > info->voltages_len)
 		return -EINVAL;

 	return info->supported_voltages[selector];
 }

 static int ab8500_regulator_get_voltage(struct regulator_dev *rdev)
 {
 	int regulator_id, ret, val;
 	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

 	regulator_id = rdev_get_id(rdev);
 	if (regulator_id >= AB8500_NUM_REGULATORS)
 		return -EINVAL;

 	ret = ab8500_read(info->ab8500, info->voltage_reg);
 	if (ret < 0) {
 		dev_err(rdev_get_dev(rdev),
 			"couldn't read voltage reg for regulator\n");
 		return ret;
 	}

 	/* vintcore has a different layout */
 	val = ret & info->voltage_mask;
 	if (regulator_id == AB8500_LDO_INTCORE)
 		ret = info->supported_voltages[val >> 0x3];
 	else
 		ret = info->supported_voltages[val];

 	return ret;
 }

 static int ab8500_get_best_voltage_index(struct regulator_dev *rdev,
 		int min_uV, int max_uV)
 {
 	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
 	int i;

 	/* check the supported voltage */
 	for (i = 0; i < info->voltages_len; i++) {
 		if ((info->supported_voltages[i] >= min_uV) &&
 		    (info->supported_voltages[i] <= max_uV))
 			return i;
 	}

 	return -EINVAL;
 }

 static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
 		int min_uV, int max_uV)
 {
 	int regulator_id, ret;
 	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

 	regulator_id = rdev_get_id(rdev);
 	if (regulator_id >= AB8500_NUM_REGULATORS)
 		return -EINVAL;

 	/* get the appropriate voltages within the range */
 	ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV);
 	if (ret < 0) {
 		dev_err(rdev_get_dev(rdev),
 				"couldn't get best voltage for regulator\n");
 		return ret;
 	}

 	/* set the registers for the request */
 	ret = ab8500_set_bits(info->ab8500, info->voltage_reg,
 				info->voltage_mask, ret);
 	if (ret < 0)
 		dev_err(rdev_get_dev(rdev),
 		"couldn't set voltage reg for regulator\n");

 	return ret;
 }

 static struct regulator_ops ab8500_regulator_ops = {
 	.enable		= ab8500_regulator_enable,
 	.disable	= ab8500_regulator_disable,
 	.is_enabled	= ab8500_regulator_is_enabled,
 	.get_voltage	= ab8500_regulator_get_voltage,
 	.set_voltage	= ab8500_regulator_set_voltage,
 	.list_voltage	= ab8500_list_voltage,
 };

 static int ab8500_fixed_get_voltage(struct regulator_dev *rdev)
 {
 	int regulator_id;
 	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

 	regulator_id = rdev_get_id(rdev);
 	if (regulator_id >= AB8500_NUM_REGULATORS)
 		return -EINVAL;

 	return info->fixed_uV;
 }

 static struct regulator_ops ab8500_ldo_fixed_ops = {
 	.enable		= ab8500_regulator_enable,
 	.disable	= ab8500_regulator_disable,
 	.is_enabled	= ab8500_regulator_is_enabled,
 	.get_voltage	= ab8500_fixed_get_voltage,
 	.list_voltage	= ab8500_list_voltage,
 };

 #define AB8500_LDO(_id, min, max, reg, reg_mask, reg_enable,	\
 		volt_reg, volt_mask, voltages,			\
 			len_volts)				\
 {								\
 	.desc	= {						\
 		.name	= "LDO-" #_id,				\
 		.ops	= &ab8500_regulator_ops,		\
 		.type	= REGULATOR_VOLTAGE,			\
 		.id	= AB8500_LDO_##_id,			\
 		.owner	= THIS_MODULE,				\
 	},							\
 	.min_uV		= (min) * 1000,				\
 	.max_uV		= (max) * 1000,				\
 	.update_reg	= reg,					\
 	.mask		= reg_mask,				\
 	.enable		= reg_enable,				\
 	.voltage_reg	= volt_reg,				\
 	.voltage_mask	= volt_mask,				\
 	.supported_voltages = voltages,				\
 	.voltages_len	= len_volts,				\
 	.fixed_uV	= 0,					\
 }

 #define AB8500_FIXED_LDO(_id, fixed, reg, reg_mask,	\
 				reg_enable)		\
 {							\
 	.desc	= {					\
 		.name	= "LDO-" #_id,			\
 		.ops	= &ab8500_ldo_fixed_ops,	\
 		.type	= REGULATOR_VOLTAGE,		\
 		.id	= AB8500_LDO_##_id,		\
 		.owner	= THIS_MODULE,			\
 	},						\
 	.fixed_uV	= fixed * 1000,			\
 	.update_reg	= reg,				\
 	.mask		= reg_mask,			\
 	.enable		= reg_enable,			\
 }

 static struct ab8500_regulator_info ab8500_regulator_info[] = {
 	/*
 	 * Variable Voltage LDOs
 	 * name, min uV, max uV, ctrl reg, reg mask, enable mask,
 	 *	volt ctrl reg, volt ctrl mask, volt table, num supported volts
 	 */
 	AB8500_LDO(AUX1, 1100, 3300, 0x0409, 0x3, 0x1, 0x041f, 0xf,
 			ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
 	AB8500_LDO(AUX2, 1100, 3300, 0x0409, 0xc, 0x4, 0x0420, 0xf,
 			ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
 	AB8500_LDO(AUX3, 1100, 3300, 0x040a, 0x3, 0x1, 0x0421, 0xf,
 			ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
 	AB8500_LDO(INTCORE, 1100, 3300, 0x0380, 0x4, 0x4, 0x0380, 0x38,
 		ldo_vintcore_voltages, ARRAY_SIZE(ldo_vintcore_voltages)),

 	/*
 	 * Fixed Voltage LDOs
 	 *		 name,	o/p uV, ctrl reg, enable, disable
 	 */
 	AB8500_FIXED_LDO(TVOUT,	  2000,   0x0380,   0x2,    0x2),
 	AB8500_FIXED_LDO(AUDIO,   2000,   0x0383,   0x2,    0x2),
 	AB8500_FIXED_LDO(ANAMIC1, 2050,   0x0383,   0x4,    0x4),
 	AB8500_FIXED_LDO(ANAMIC2, 2050,   0x0383,   0x8,    0x8),
 	AB8500_FIXED_LDO(DMIC,    1800,   0x0383,   0x10,   0x10),
 	AB8500_FIXED_LDO(ANA,     1200,   0x0383,   0xc,    0x4),
 };

 static inline struct ab8500_regulator_info *find_regulator_info(int id)
 {
 	struct ab8500_regulator_info *info;
 	int i;

 	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
 		info = &ab8500_regulator_info[i];
 		if (info->desc.id == id)
 			return info;
 	}
 	return NULL;
 }

 static __devinit int ab8500_regulator_probe(struct platform_device *pdev)
 {
 	struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
 	struct ab8500_platform_data *pdata = dev_get_platdata(ab8500->dev);
 	int i, err;

 	if (!ab8500) {
 		dev_err(&pdev->dev, "null mfd parent\n");
 		return -EINVAL;
 	}

 	/* register all regulators */
 	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
 		struct ab8500_regulator_info *info = NULL;

 		/* assign per-regulator data */
 		info = &ab8500_regulator_info[i];
 		info->dev = &pdev->dev;
 		info->ab8500 = ab8500;

 		info->regulator = regulator_register(&info->desc, &pdev->dev,
 				pdata->regulator[i], info);
 		if (IS_ERR(info->regulator)) {
 			err = PTR_ERR(info->regulator);
 			dev_err(&pdev->dev, "failed to register regulator %s\n",
 					info->desc.name);
 			/* when we fail, un-register all earlier regulators */
 			i--;
 			while (i > 0) {
 				info = &ab8500_regulator_info[i];
 				regulator_unregister(info->regulator);
 				i--;
 			}
 			return err;
 		}
 	}

 	return 0;
 }

 static __devexit int ab8500_regulator_remove(struct platform_device *pdev)
 {
 	int i;

 	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
 		struct ab8500_regulator_info *info = NULL;
 		info = &ab8500_regulator_info[i];
 		regulator_unregister(info->regulator);
 	}

 	return 0;
 }

 static struct platform_driver ab8500_regulator_driver = {
 	.probe = ab8500_regulator_probe,
 	.remove = __devexit_p(ab8500_regulator_remove),
 	.driver         = {
 		.name   = "ab8500-regulator",
 		.owner  = THIS_MODULE,
 	},
 };

 static int __init ab8500_regulator_init(void)
 {
 	int ret;

 	ret = platform_driver_register(&ab8500_regulator_driver);
 	if (ret != 0)
 		pr_err("Failed to register ab8500 regulator: %d\n", ret);

 	return ret;
 }
 subsys_initcall(ab8500_regulator_init);

 static void __exit ab8500_regulator_exit(void)
 {
 	platform_driver_unregister(&ab8500_regulator_driver);
 }
 module_exit(ab8500_regulator_exit);

 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
 MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC");
 MODULE_ALIAS("platform:ab8500-regulator");
	/*
	* Copyright (C) ST-Ericsson SA 2010
	*
	* License Terms: GNU General Public License v2
	*
	* Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
	*
	* AB8500 peripheral regulators
	*
	* AB8500 supports the following regulators,
	* LDOs - VAUDIO, VANAMIC2/2, VDIGMIC, VINTCORE12, VTVOUT,
	* VAUX1/2/3, VANA
	*
	* for DB8500 cut 1.0 and previous versions of the silicon, all accesses
	* to registers are through the DB8500 SPI. In cut 1.1 onwards, these
	* accesses are through the DB8500 PRCMU I2C
	*
	*/
	#include <linux/init.h>
	#include <linux/kernel.h>
	#include <linux/err.h>
	#include <linux/platform_device.h>
	#include <linux/mfd/ab8500.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/regulator/ab8500.h>

	/**
	* struct ab8500_regulator_info - ab8500 regulator information
	* @desc: regulator description
	* @ab8500: ab8500 parent
	* @regulator_dev: regulator device
	* @max_uV: maximum voltage (for variable voltage supplies)
	* @min_uV: minimum voltage (for variable voltage supplies)
	* @fixed_uV: typical voltage (for fixed voltage supplies)
	* @update_reg: register to control on/off
	* @mask: mask to enable/disable regulator
	* @enable: bits to enable the regulator in normal(high power) mode
	* @voltage_reg: register to control regulator voltage
	* @voltage_mask: mask to control regulator voltage
	* @supported_voltages: supported voltage table
	* @voltages_len: number of supported voltages for the regulator
	*/
	struct ab8500_regulator_info {
	struct device *dev;
	struct regulator_desc desc;
	struct ab8500 *ab8500;
	struct regulator_dev *regulator;
	int max_uV;
	int min_uV;
	int fixed_uV;
	int update_reg;
	int mask;
	int enable;
	int voltage_reg;
	int voltage_mask;
	int const *supported_voltages;
	int voltages_len;
	};

	/* voltage tables for the vauxn/vintcore supplies */
	static const int ldo_vauxn_voltages[] = {
	1100000,
	1200000,
	1300000,
	1400000,
	1500000,
	1800000,
	1850000,
	1900000,
	2500000,
	2650000,
	2700000,
	2750000,
	2800000,
	2900000,
	3000000,
	3300000,
	};

	static const int ldo_vintcore_voltages[] = {
	1200000,
	1225000,
	1250000,
	1275000,
	1300000,
	1325000,
	1350000,
	};

	static int ab8500_regulator_enable(struct regulator_dev *rdev)
	{
	int regulator_id, ret;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
	return -EINVAL;

	ret = ab8500_set_bits(info->ab8500, info->update_reg,
	info->mask, info->enable);
	if (ret < 0)
	dev_err(rdev_get_dev(rdev),
	"couldn't set enable bits for regulator\n");
	return ret;
	}

	static int ab8500_regulator_disable(struct regulator_dev *rdev)
	{
	int regulator_id, ret;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
	return -EINVAL;

	ret = ab8500_set_bits(info->ab8500, info->update_reg,
	info->mask, 0x0);
	if (ret < 0)
	dev_err(rdev_get_dev(rdev),
	"couldn't set disable bits for regulator\n");
	return ret;
	}

	static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
	{
	int regulator_id, ret;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
	return -EINVAL;

	ret = ab8500_read(info->ab8500, info->update_reg);
	if (ret < 0) {
	dev_err(rdev_get_dev(rdev),
	"couldn't read 0x%x register\n", info->update_reg);
	return ret;
	}

	if (ret & info->mask)
	return true;
	else
	return false;
	}

	static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector)
	{
	int regulator_id;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
	return -EINVAL;

	/* return the uV for the fixed regulators */
	if (info->fixed_uV)
	return info->fixed_uV;

	if (selector > info->voltages_len)
	return -EINVAL;

	return info->supported_voltages[selector];
	}

	static int ab8500_regulator_get_voltage(struct regulator_dev *rdev)
	{
	int regulator_id, ret, val;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
	return -EINVAL;

	ret = ab8500_read(info->ab8500, info->voltage_reg);
	if (ret < 0) {
	dev_err(rdev_get_dev(rdev),
	"couldn't read voltage reg for regulator\n");
	return ret;
	}

	/* vintcore has a different layout */
	val = ret & info->voltage_mask;
	if (regulator_id == AB8500_LDO_INTCORE)
	ret = info->supported_voltages[val >> 0x3];
	else
	ret = info->supported_voltages[val];

	return ret;
	}

	static int ab8500_get_best_voltage_index(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
	int i;

	/* check the supported voltage */
	for (i = 0; i < info->voltages_len; i++) {
	if ((info->supported_voltages[i] >= min_uV) &&
	(info->supported_voltages[i] <= max_uV))
	return i;
	}

	return -EINVAL;
	}

	static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	int regulator_id, ret;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
	return -EINVAL;

	/* get the appropriate voltages within the range */
	ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV);
	if (ret < 0) {
	dev_err(rdev_get_dev(rdev),
	"couldn't get best voltage for regulator\n");
	return ret;
	}

	/* set the registers for the request */
	ret = ab8500_set_bits(info->ab8500, info->voltage_reg,
	info->voltage_mask, ret);
	if (ret < 0)
	dev_err(rdev_get_dev(rdev),
	"couldn't set voltage reg for regulator\n");

	return ret;
	}

	static struct regulator_ops ab8500_regulator_ops = {
	.enable = ab8500_regulator_enable,
	.disable = ab8500_regulator_disable,
	.is_enabled = ab8500_regulator_is_enabled,
	.get_voltage = ab8500_regulator_get_voltage,
	.set_voltage = ab8500_regulator_set_voltage,
	.list_voltage = ab8500_list_voltage,
	};

	static int ab8500_fixed_get_voltage(struct regulator_dev *rdev)
	{
	int regulator_id;
	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= AB8500_NUM_REGULATORS)
	return -EINVAL;

	return info->fixed_uV;
	}

	static struct regulator_ops ab8500_ldo_fixed_ops = {
	.enable = ab8500_regulator_enable,
	.disable = ab8500_regulator_disable,
	.is_enabled = ab8500_regulator_is_enabled,
	.get_voltage = ab8500_fixed_get_voltage,
	.list_voltage = ab8500_list_voltage,
	};

	#define AB8500_LDO(_id, min, max, reg, reg_mask, reg_enable, \
	volt_reg, volt_mask, voltages, \
	len_volts) \
	{ \
	.desc = { \
	.name = "LDO-" #_id, \
	.ops = &ab8500_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = AB8500_LDO_##_id, \
	.owner = THIS_MODULE, \
	}, \
	.min_uV = (min) * 1000, \
	.max_uV = (max) * 1000, \
	.update_reg = reg, \
	.mask = reg_mask, \
	.enable = reg_enable, \
	.voltage_reg = volt_reg, \
	.voltage_mask = volt_mask, \
	.supported_voltages = voltages, \
	.voltages_len = len_volts, \
	.fixed_uV = 0, \
	}

	#define AB8500_FIXED_LDO(_id, fixed, reg, reg_mask, \
	reg_enable) \
	{ \
	.desc = { \
	.name = "LDO-" #_id, \
	.ops = &ab8500_ldo_fixed_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = AB8500_LDO_##_id, \
	.owner = THIS_MODULE, \
	}, \
	.fixed_uV = fixed * 1000, \
	.update_reg = reg, \
	.mask = reg_mask, \
	.enable = reg_enable, \
	}

	static struct ab8500_regulator_info ab8500_regulator_info[] = {
	/*
	* Variable Voltage LDOs
	* name, min uV, max uV, ctrl reg, reg mask, enable mask,
	* volt ctrl reg, volt ctrl mask, volt table, num supported volts
	*/
	AB8500_LDO(AUX1, 1100, 3300, 0x0409, 0x3, 0x1, 0x041f, 0xf,
	ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
	AB8500_LDO(AUX2, 1100, 3300, 0x0409, 0xc, 0x4, 0x0420, 0xf,
	ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
	AB8500_LDO(AUX3, 1100, 3300, 0x040a, 0x3, 0x1, 0x0421, 0xf,
	ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
	AB8500_LDO(INTCORE, 1100, 3300, 0x0380, 0x4, 0x4, 0x0380, 0x38,
	ldo_vintcore_voltages, ARRAY_SIZE(ldo_vintcore_voltages)),

	/*
	* Fixed Voltage LDOs
	* name, o/p uV, ctrl reg, enable, disable
	*/
	AB8500_FIXED_LDO(TVOUT, 2000, 0x0380, 0x2, 0x2),
	AB8500_FIXED_LDO(AUDIO, 2000, 0x0383, 0x2, 0x2),
	AB8500_FIXED_LDO(ANAMIC1, 2050, 0x0383, 0x4, 0x4),
	AB8500_FIXED_LDO(ANAMIC2, 2050, 0x0383, 0x8, 0x8),
	AB8500_FIXED_LDO(DMIC, 1800, 0x0383, 0x10, 0x10),
	AB8500_FIXED_LDO(ANA, 1200, 0x0383, 0xc, 0x4),
	};

	static inline struct ab8500_regulator_info *find_regulator_info(int id)
	{
	struct ab8500_regulator_info *info;
	int i;

	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
	info = &ab8500_regulator_info[i];
	if (info->desc.id == id)
	return info;
	}
	return NULL;
	}

	static __devinit int ab8500_regulator_probe(struct platform_device *pdev)
	{
	struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
	struct ab8500_platform_data *pdata = dev_get_platdata(ab8500->dev);
	int i, err;

	if (!ab8500) {
	dev_err(&pdev->dev, "null mfd parent\n");
	return -EINVAL;
	}

	/* register all regulators */
	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
	struct ab8500_regulator_info *info = NULL;

	/* assign per-regulator data */
	info = &ab8500_regulator_info[i];
	info->dev = &pdev->dev;
	info->ab8500 = ab8500;

	info->regulator = regulator_register(&info->desc, &pdev->dev,
	pdata->regulator[i], info);
	if (IS_ERR(info->regulator)) {
	err = PTR_ERR(info->regulator);
	dev_err(&pdev->dev, "failed to register regulator %s\n",
	info->desc.name);
	/* when we fail, un-register all earlier regulators */
	i--;
	while (i > 0) {
	info = &ab8500_regulator_info[i];
	regulator_unregister(info->regulator);
	i--;
	}
	return err;
	}
	}

	return 0;
	}

	static __devexit int ab8500_regulator_remove(struct platform_device *pdev)
	{
	int i;

	for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
	struct ab8500_regulator_info *info = NULL;
	info = &ab8500_regulator_info[i];
	regulator_unregister(info->regulator);
	}

	return 0;
	}

	static struct platform_driver ab8500_regulator_driver = {
	.probe = ab8500_regulator_probe,
	.remove = __devexit_p(ab8500_regulator_remove),
	.driver = {
	.name = "ab8500-regulator",
	.owner = THIS_MODULE,
	},
	};

	static int __init ab8500_regulator_init(void)
	{
	int ret;

	ret = platform_driver_register(&ab8500_regulator_driver);
	if (ret != 0)
	pr_err("Failed to register ab8500 regulator: %d\n", ret);

	return ret;
	}
	subsys_initcall(ab8500_regulator_init);

	static void __exit ab8500_regulator_exit(void)
	{
	platform_driver_unregister(&ab8500_regulator_driver);
	}
	module_exit(ab8500_regulator_exit);

	MODULE_LICENSE("GPL v2");
	MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
	MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC");
	MODULE_ALIAS("platform:ab8500-regulator");