drivers/regulator/88pm8607.c - kernel/msm-4.9 - Gitiles

 /*
  * Regulators driver for Marvell 88PM8607
  *
  * Copyright (C) 2009 Marvell International Ltd.
  * 	Haojian Zhuang <haojian.zhuang@marvell.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/kernel.h>
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/i2c.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/mfd/88pm860x.h>

 struct pm8607_regulator_info {
 	struct regulator_desc	desc;
 	struct pm860x_chip	*chip;
 	struct regulator_dev	*regulator;
 	struct i2c_client	*i2c;

 	int	min_uV;
 	int	max_uV;
 	int	step_uV;
 	int	vol_reg;
 	int	vol_shift;
 	int	vol_nbits;
 	int	update_reg;
 	int	update_bit;
 	int	enable_reg;
 	int	enable_bit;
 	int	slope_double;
 };

 static inline int check_range(struct pm8607_regulator_info *info,
 				int min_uV, int max_uV)
 {
 	if (max_uV < info->min_uV || min_uV > info->max_uV || min_uV > max_uV)
 		return -EINVAL;

 	return 0;
 }

 static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index)
 {
 	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 	int ret = -EINVAL;

 	switch (info->desc.id) {
 	case PM8607_ID_BUCK1:
 		ret = (index < 0x1d) ? (index * 25000 + 800000) :
 			((index < 0x20) ? 1500000 :
 			((index < 0x40) ? ((index - 0x20) * 25000) :
 			-EINVAL));
 		break;
 	case PM8607_ID_BUCK3:
 		ret = (index < 0x3d) ? (index * 25000) :
 			((index < 0x40) ? 1500000 : -EINVAL);
 		if (ret < 0)
 			break;
 		if (info->slope_double)
 			ret <<= 1;
 		break;
 	case PM8607_ID_LDO1:
 		ret = (index == 0) ? 1800000 :
 			((index == 1) ? 1200000 :
 			((index == 2) ? 2800000 : -EINVAL));
 		break;
 	case PM8607_ID_LDO5:
 		ret = (index == 0) ? 2900000 :
 			((index == 1) ? 3000000 :
 			((index == 2) ? 3100000 : 3300000));
 		break;
 	case PM8607_ID_LDO7:
 	case PM8607_ID_LDO8:
 		ret = (index < 3) ? (index * 50000 + 1800000) :
 			((index < 8) ? (index * 50000 + 2550000) :
 			 -EINVAL);
 		break;
 	case PM8607_ID_LDO12:
 		ret = (index < 2) ? (index * 100000 + 1800000) :
 			((index < 7) ? (index * 100000 + 2500000) :
 			((index == 7) ? 3300000 : 1200000));
 		break;
 	case PM8607_ID_LDO2:
 	case PM8607_ID_LDO3:
 	case PM8607_ID_LDO9:
 		ret = (index < 3) ? (index * 50000 + 1800000) :
 			((index < 7) ? (index * 50000 + 2550000) :
 			3300000);
 		break;
 	case PM8607_ID_LDO4:
 		ret = (index < 3) ? (index * 50000 + 1800000) :
 			((index < 6) ? (index * 50000 + 2550000) :
 			((index == 6) ? 2900000 : 3300000));
 		break;
 	case PM8607_ID_LDO6:
 		ret = (index < 2) ? (index * 50000 + 1800000) :
 			((index < 7) ? (index * 50000 + 2500000) :
 			3300000);
 		break;
 	case PM8607_ID_LDO10:
 		ret = (index < 3) ? (index * 50000 + 1800000) :
 			((index < 7) ? (index * 50000 + 2550000) :
 			((index == 7) ? 3300000 : 1200000));
 		break;
 	case PM8607_ID_LDO14:
 		ret = (index < 2) ? (index * 50000 + 1800000) :
 			((index < 7) ? (index * 50000 + 2600000) :
 			3300000);
 		break;
 	}
 	return ret;
 }

 static int choose_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
 {
 	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 	int val = -ENOENT;
 	int ret;

 	switch (info->desc.id) {
 	case PM8607_ID_BUCK1:
 		if (min_uV >= 800000) 		/* 800mV ~ 1500mV / 25mV */
 			val = (min_uV - 775001) / 25000;
 		else {				/* 25mV ~ 775mV / 25mV */
 			val = (min_uV + 249999) / 25000;
 			val += 32;
 		}
 		break;
 	case PM8607_ID_BUCK3:
 		if (info->slope_double)
 			min_uV = min_uV >> 1;
 		val = (min_uV + 249999) / 25000; /* 0mV ~ 1500mV / 25mV */

 		break;
 	case PM8607_ID_LDO1:
 		if (min_uV > 1800000)
 			val = 2;
 		else if (min_uV > 1200000)
 			val = 0;
 		else
 			val = 1;
 		break;
 	case PM8607_ID_LDO5:
 		if (min_uV > 3100000)
 			val = 3;
 		else				/* 2900mV ~ 3100mV / 100mV */
 			val = (min_uV - 2800001) / 100000;
 		break;
 	case PM8607_ID_LDO7:
 	case PM8607_ID_LDO8:
 		if (min_uV < 2700000) {	/* 1800mV ~ 1900mV / 50mV */
 			if (min_uV <= 1800000)
 				val = 0;	/* 1800mv */
 			else if (min_uV <= 1900000)
 				val = (min_uV - 1750001) / 50000;
 			else
 				val = 3;	/* 2700mV */
 		} else {		 /* 2700mV ~ 2900mV / 50mV */
 			if (min_uV <= 2900000) {
 				val = (min_uV - 2650001) / 50000;
 				val += 3;
 			} else
 				val = -EINVAL;
 		}
 		break;
 	case PM8607_ID_LDO10:
 		if (min_uV > 2850000)
 			val = 7;
 		else if (min_uV <= 1200000)
 			val = 8;
 		else if (min_uV < 2700000)	/* 1800mV ~ 1900mV / 50mV */
 			val = (min_uV - 1750001) / 50000;
 		else {				/* 2700mV ~ 2850mV / 50mV */
 			val = (min_uV - 2650001) / 50000;
 			val += 3;
 		}
 		break;
 	case PM8607_ID_LDO12:
 		if (min_uV < 2700000) {		/* 1800mV ~ 1900mV / 100mV */
 			if (min_uV <= 1200000)
 				val = 8;	/* 1200mV */
 			else if (min_uV <= 1800000)
 				val = 0;	/* 1800mV */
 			else if (min_uV <= 1900000)
 				val = (min_uV - 1700001) / 100000;
 			else
 				val = 2;	/* 2700mV */
 		} else {			/* 2700mV ~ 3100mV / 100mV */
 			if (min_uV <= 3100000) {
 				val = (min_uV - 2600001) / 100000;
 				val += 2;
 			} else if (min_uV <= 3300000)
 				val = 7;
 			else
 				val = -EINVAL;
 		}
 		break;
 	case PM8607_ID_LDO2:
 	case PM8607_ID_LDO3:
 	case PM8607_ID_LDO9:
 		if (min_uV < 2700000) {	/* 1800mV ~ 1900mV / 50mV */
 			if (min_uV <= 1800000)
 				val = 0;
 			else if (min_uV <= 1900000)
 				val = (min_uV - 1750001) / 50000;
 			else
 				val = 3;	/* 2700mV */
 		} else {		 /* 2700mV ~ 2850mV / 50mV */
 			if (min_uV <= 2850000) {
 				val = (min_uV - 2650001) / 50000;
 				val += 3;
 			} else if (min_uV <= 3300000)
 				val = 7;
 			else
 				val = -EINVAL;
 		}
 		break;
 	case PM8607_ID_LDO4:
 		if (min_uV < 2700000) {	/* 1800mV ~ 1900mV / 50mV */
 			if (min_uV <= 1800000)
 				val = 0;
 			else if (min_uV <= 1900000)
 				val = (min_uV - 1750001) / 50000;
 			else
 				val = 3;	/* 2700mV */
 		} else {		 /* 2700mV ~ 2800mV / 50mV */
 			if (min_uV <= 2850000) {
 				val = (min_uV - 2650001) / 50000;
 				val += 3;
 			} else if (min_uV <= 2900000)
 				val = 6;
 			else if (min_uV <= 3300000)
 				val = 7;
 			else
 				val = -EINVAL;
 		}
 		break;
 	case PM8607_ID_LDO6:
 		if (min_uV < 2600000) {	/* 1800mV ~ 1850mV / 50mV */
 			if (min_uV <= 1800000)
 				val = 0;
 			else if (min_uV <= 1850000)
 				val = (min_uV - 1750001) / 50000;
 			else
 				val = 2;	/* 2600mV */
 		} else {		/* 2600mV ~ 2800mV / 50mV */
 			if (min_uV <= 2800000) {
 				val = (min_uV - 2550001) / 50000;
 				val += 2;
 			} else if (min_uV <= 3300000)
 				val = 7;
 			else
 				val = -EINVAL;
 		}
 		break;
 	case PM8607_ID_LDO14:
 		if (min_uV < 2700000) {	/* 1800mV ~ 1850mV / 50mV */
 			if (min_uV <= 1800000)
 				val = 0;
 			else if (min_uV <= 1850000)
 				val = (min_uV - 1750001) / 50000;
 			else
 				val = 2;	/* 2700mV */
 		} else {		 /* 2700mV ~ 2900mV / 50mV */
 			if (min_uV <= 2900000) {
 				val = (min_uV - 2650001) / 50000;
 				val += 2;
 			} else if (min_uV <= 3300000)
 				val = 7;
 			else
 				val = -EINVAL;
 		}
 		break;
 	}
 	if (val >= 0) {
 		ret = pm8607_list_voltage(rdev, val);
 		if (ret > max_uV) {
 			pr_err("exceed voltage range (%d %d) uV",
 				min_uV, max_uV);
 			return -EINVAL;
 		}
 	} else
 		pr_err("invalid voltage range (%d %d) uV", min_uV, max_uV);
 	return val;
 }

 static int pm8607_set_voltage(struct regulator_dev *rdev,
 			      int min_uV, int max_uV)
 {
 	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 	uint8_t val, mask;
 	int ret;

 	if (check_range(info, min_uV, max_uV)) {
 		pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
 		return -EINVAL;
 	}

 	ret = choose_voltage(rdev, min_uV, max_uV);
 	if (ret < 0)
 		return -EINVAL;
 	val = (uint8_t)(ret << info->vol_shift);
 	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;

 	ret = pm860x_set_bits(info->i2c, info->vol_reg, mask, val);
 	if (ret)
 		return ret;
 	switch (info->desc.id) {
 	case PM8607_ID_BUCK1:
 	case PM8607_ID_BUCK3:
 		ret = pm860x_set_bits(info->i2c, info->update_reg,
 				      1 << info->update_bit,
 				      1 << info->update_bit);
 		break;
 	}
 	return ret;
 }

 static int pm8607_get_voltage(struct regulator_dev *rdev)
 {
 	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 	uint8_t val, mask;
 	int ret;

 	ret = pm860x_reg_read(info->i2c, info->vol_reg);
 	if (ret < 0)
 		return ret;

 	mask = ((1 << info->vol_nbits) - 1)  << info->vol_shift;
 	val = ((unsigned char)ret & mask) >> info->vol_shift;

 	return pm8607_list_voltage(rdev, val);
 }

 static int pm8607_enable(struct regulator_dev *rdev)
 {
 	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);

 	return pm860x_set_bits(info->i2c, info->enable_reg,
 			       1 << info->enable_bit,
 			       1 << info->enable_bit);
 }

 static int pm8607_disable(struct regulator_dev *rdev)
 {
 	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);

 	return pm860x_set_bits(info->i2c, info->enable_reg,
 			       1 << info->enable_bit, 0);
 }

 static int pm8607_is_enabled(struct regulator_dev *rdev)
 {
 	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
 	int ret;

 	ret = pm860x_reg_read(info->i2c, info->enable_reg);
 	if (ret < 0)
 		return ret;

 	return !!((unsigned char)ret & (1 << info->enable_bit));
 }

 static struct regulator_ops pm8607_regulator_ops = {
 	.set_voltage	= pm8607_set_voltage,
 	.get_voltage	= pm8607_get_voltage,
 	.enable		= pm8607_enable,
 	.disable	= pm8607_disable,
 	.is_enabled	= pm8607_is_enabled,
 };

 #define PM8607_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
 {									\
 	.desc	= {							\
 		.name	= "BUCK" #_id,					\
 		.ops	= &pm8607_regulator_ops,			\
 		.type	= REGULATOR_VOLTAGE,				\
 		.id	= PM8607_ID_BUCK##_id,				\
 		.owner	= THIS_MODULE,					\
 	},								\
 	.min_uV		= (min) * 1000,					\
 	.max_uV		= (max) * 1000,					\
 	.step_uV	= (step) * 1000,				\
 	.vol_reg	= PM8607_##vreg,				\
 	.vol_shift	= (0),						\
 	.vol_nbits	= (nbits),					\
 	.update_reg	= PM8607_##ureg,				\
 	.update_bit	= (ubit),					\
 	.enable_reg	= PM8607_##ereg,				\
 	.enable_bit	= (ebit),					\
 	.slope_double	= (0),						\
 }

 #define PM8607_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit)	\
 {									\
 	.desc	= {							\
 		.name	= "LDO" #_id,					\
 		.ops	= &pm8607_regulator_ops,			\
 		.type	= REGULATOR_VOLTAGE,				\
 		.id	= PM8607_ID_LDO##_id,				\
 		.owner	= THIS_MODULE,					\
 	},								\
 	.min_uV		= (min) * 1000,					\
 	.max_uV		= (max) * 1000,					\
 	.step_uV	= (step) * 1000,				\
 	.vol_reg	= PM8607_##vreg,				\
 	.vol_shift	= (shift),					\
 	.vol_nbits	= (nbits),					\
 	.enable_reg	= PM8607_##ereg,				\
 	.enable_bit	= (ebit),					\
 	.slope_double	= (0),						\
 }

 static struct pm8607_regulator_info pm8607_regulator_info[] = {
 	PM8607_DVC(1, 0, 1500, 25, BUCK1, 6, GO, 0, SUPPLIES_EN11, 0),
 	PM8607_DVC(3, 0, 1500, 25, BUCK3, 6, GO, 2, SUPPLIES_EN11, 2),

 	PM8607_LDO(1 , 1200, 2800, 0, LDO1 , 0, 2, SUPPLIES_EN11, 3),
 	PM8607_LDO(2 , 1800, 3300, 0, LDO2 , 0, 3, SUPPLIES_EN11, 4),
 	PM8607_LDO(3 , 1800, 3300, 0, LDO3 , 0, 3, SUPPLIES_EN11, 5),
 	PM8607_LDO(4 , 1800, 3300, 0, LDO4 , 0, 3, SUPPLIES_EN11, 6),
 	PM8607_LDO(5 , 2900, 3300, 0, LDO5 , 0, 2, SUPPLIES_EN11, 7),
 	PM8607_LDO(6 , 1800, 3300, 0, LDO6 , 0, 3, SUPPLIES_EN12, 0),
 	PM8607_LDO(7 , 1800, 2900, 0, LDO7 , 0, 3, SUPPLIES_EN12, 1),
 	PM8607_LDO(8 , 1800, 2900, 0, LDO8 , 0, 3, SUPPLIES_EN12, 2),
 	PM8607_LDO(9 , 1800, 3300, 0, LDO9 , 0, 3, SUPPLIES_EN12, 3),
 	PM8607_LDO(10, 1200, 3300, 0, LDO10, 0, 4, SUPPLIES_EN11, 4),
 	PM8607_LDO(12, 1200, 3300, 0, LDO12, 0, 4, SUPPLIES_EN11, 5),
 	PM8607_LDO(14, 1800, 3300, 0, LDO14, 0, 3, SUPPLIES_EN11, 6),
 };

 static inline struct pm8607_regulator_info *find_regulator_info(int id)
 {
 	struct pm8607_regulator_info *info;
 	int i;

 	for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) {
 		info = &pm8607_regulator_info[i];
 		if (info->desc.id == id)
 			return info;
 	}
 	return NULL;
 }

 static int __devinit pm8607_regulator_probe(struct platform_device *pdev)
 {
 	struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
 	struct pm860x_platform_data *pdata = chip->dev->platform_data;
 	struct pm8607_regulator_info *info = NULL;

 	info = find_regulator_info(pdev->id);
 	if (info == NULL) {
 		dev_err(&pdev->dev, "invalid regulator ID specified\n");
 		return -EINVAL;
 	}

 	info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 	info->chip = chip;

 	info->regulator = regulator_register(&info->desc, &pdev->dev,
 					     pdata->regulator[pdev->id], info);
 	if (IS_ERR(info->regulator)) {
 		dev_err(&pdev->dev, "failed to register regulator %s\n",
 			info->desc.name);
 		return PTR_ERR(info->regulator);
 	}

 	/* check DVC ramp slope double */
 	if (info->desc.id == PM8607_ID_BUCK3)
 		if (info->chip->buck3_double)
 			info->slope_double = 1;

 	platform_set_drvdata(pdev, info);
 	return 0;
 }

 static int __devexit pm8607_regulator_remove(struct platform_device *pdev)
 {
 	struct pm8607_regulator_info *info = platform_get_drvdata(pdev);

 	regulator_unregister(info->regulator);
 	return 0;
 }

 #define PM8607_REGULATOR_DRIVER(_name)				\
 {								\
 	.driver		= {					\
 		.name	= "88pm8607-" #_name,			\
 		.owner	= THIS_MODULE,				\
 	},							\
 	.probe		= pm8607_regulator_probe,		\
 	.remove		= __devexit_p(pm8607_regulator_remove),	\
 }

 static struct platform_driver pm8607_regulator_driver[] = {
 	PM8607_REGULATOR_DRIVER(buck1),
 	PM8607_REGULATOR_DRIVER(buck2),
 	PM8607_REGULATOR_DRIVER(buck3),
 	PM8607_REGULATOR_DRIVER(ldo1),
 	PM8607_REGULATOR_DRIVER(ldo2),
 	PM8607_REGULATOR_DRIVER(ldo3),
 	PM8607_REGULATOR_DRIVER(ldo4),
 	PM8607_REGULATOR_DRIVER(ldo5),
 	PM8607_REGULATOR_DRIVER(ldo6),
 	PM8607_REGULATOR_DRIVER(ldo7),
 	PM8607_REGULATOR_DRIVER(ldo8),
 	PM8607_REGULATOR_DRIVER(ldo9),
 	PM8607_REGULATOR_DRIVER(ldo10),
 	PM8607_REGULATOR_DRIVER(ldo12),
 	PM8607_REGULATOR_DRIVER(ldo14),
 };

 static int __init pm8607_regulator_init(void)
 {
 	int i, count, ret;

 	count = ARRAY_SIZE(pm8607_regulator_driver);
 	for (i = 0; i < count; i++) {
 		ret = platform_driver_register(&pm8607_regulator_driver[i]);
 		if (ret != 0)
 			pr_err("Failed to register regulator driver: %d\n",
 				ret);
 	}
 	return 0;
 }
 subsys_initcall(pm8607_regulator_init);

 static void __exit pm8607_regulator_exit(void)
 {
 	int i, count;

 	count = ARRAY_SIZE(pm8607_regulator_driver);
 	for (i = 0; i < count; i++)
 		platform_driver_unregister(&pm8607_regulator_driver[i]);
 }
 module_exit(pm8607_regulator_exit);

 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC");
 MODULE_ALIAS("platform:88pm8607-regulator");
	/*
	* Regulators driver for Marvell 88PM8607
	*
	* Copyright (C) 2009 Marvell International Ltd.
	* Haojian Zhuang <haojian.zhuang@marvell.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/kernel.h>
	#include <linux/init.h>
	#include <linux/err.h>
	#include <linux/i2c.h>
	#include <linux/platform_device.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/mfd/88pm860x.h>

	struct pm8607_regulator_info {
	struct regulator_desc desc;
	struct pm860x_chip *chip;
	struct regulator_dev *regulator;
	struct i2c_client *i2c;

	int min_uV;
	int max_uV;
	int step_uV;
	int vol_reg;
	int vol_shift;
	int vol_nbits;
	int update_reg;
	int update_bit;
	int enable_reg;
	int enable_bit;
	int slope_double;
	};

	static inline int check_range(struct pm8607_regulator_info *info,
	int min_uV, int max_uV)
	{
	if (max_uV < info->min_uV \|\| min_uV > info->max_uV \|\| min_uV > max_uV)
	return -EINVAL;

	return 0;
	}

	static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index)
	{
	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
	int ret = -EINVAL;

	switch (info->desc.id) {
	case PM8607_ID_BUCK1:
	ret = (index < 0x1d) ? (index * 25000 + 800000) :
	((index < 0x20) ? 1500000 :
	((index < 0x40) ? ((index - 0x20) * 25000) :
	-EINVAL));
	break;
	case PM8607_ID_BUCK3:
	ret = (index < 0x3d) ? (index * 25000) :
	((index < 0x40) ? 1500000 : -EINVAL);
	if (ret < 0)
	break;
	if (info->slope_double)
	ret <<= 1;
	break;
	case PM8607_ID_LDO1:
	ret = (index == 0) ? 1800000 :
	((index == 1) ? 1200000 :
	((index == 2) ? 2800000 : -EINVAL));
	break;
	case PM8607_ID_LDO5:
	ret = (index == 0) ? 2900000 :
	((index == 1) ? 3000000 :
	((index == 2) ? 3100000 : 3300000));
	break;
	case PM8607_ID_LDO7:
	case PM8607_ID_LDO8:
	ret = (index < 3) ? (index * 50000 + 1800000) :
	((index < 8) ? (index * 50000 + 2550000) :
	-EINVAL);
	break;
	case PM8607_ID_LDO12:
	ret = (index < 2) ? (index * 100000 + 1800000) :
	((index < 7) ? (index * 100000 + 2500000) :
	((index == 7) ? 3300000 : 1200000));
	break;
	case PM8607_ID_LDO2:
	case PM8607_ID_LDO3:
	case PM8607_ID_LDO9:
	ret = (index < 3) ? (index * 50000 + 1800000) :
	((index < 7) ? (index * 50000 + 2550000) :
	3300000);
	break;
	case PM8607_ID_LDO4:
	ret = (index < 3) ? (index * 50000 + 1800000) :
	((index < 6) ? (index * 50000 + 2550000) :
	((index == 6) ? 2900000 : 3300000));
	break;
	case PM8607_ID_LDO6:
	ret = (index < 2) ? (index * 50000 + 1800000) :
	((index < 7) ? (index * 50000 + 2500000) :
	3300000);
	break;
	case PM8607_ID_LDO10:
	ret = (index < 3) ? (index * 50000 + 1800000) :
	((index < 7) ? (index * 50000 + 2550000) :
	((index == 7) ? 3300000 : 1200000));
	break;
	case PM8607_ID_LDO14:
	ret = (index < 2) ? (index * 50000 + 1800000) :
	((index < 7) ? (index * 50000 + 2600000) :
	3300000);
	break;
	}
	return ret;
	}

	static int choose_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
	{
	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
	int val = -ENOENT;
	int ret;

	switch (info->desc.id) {
	case PM8607_ID_BUCK1:
	if (min_uV >= 800000) /* 800mV ~ 1500mV / 25mV */
	val = (min_uV - 775001) / 25000;
	else { /* 25mV ~ 775mV / 25mV */
	val = (min_uV + 249999) / 25000;
	val += 32;
	}
	break;
	case PM8607_ID_BUCK3:
	if (info->slope_double)
	min_uV = min_uV >> 1;
	val = (min_uV + 249999) / 25000; /* 0mV ~ 1500mV / 25mV */

	break;
	case PM8607_ID_LDO1:
	if (min_uV > 1800000)
	val = 2;
	else if (min_uV > 1200000)
	val = 0;
	else
	val = 1;
	break;
	case PM8607_ID_LDO5:
	if (min_uV > 3100000)
	val = 3;
	else /* 2900mV ~ 3100mV / 100mV */
	val = (min_uV - 2800001) / 100000;
	break;
	case PM8607_ID_LDO7:
	case PM8607_ID_LDO8:
	if (min_uV < 2700000) { /* 1800mV ~ 1900mV / 50mV */
	if (min_uV <= 1800000)
	val = 0; /* 1800mv */
	else if (min_uV <= 1900000)
	val = (min_uV - 1750001) / 50000;
	else
	val = 3; /* 2700mV */
	} else { /* 2700mV ~ 2900mV / 50mV */
	if (min_uV <= 2900000) {
	val = (min_uV - 2650001) / 50000;
	val += 3;
	} else
	val = -EINVAL;
	}
	break;
	case PM8607_ID_LDO10:
	if (min_uV > 2850000)
	val = 7;
	else if (min_uV <= 1200000)
	val = 8;
	else if (min_uV < 2700000) /* 1800mV ~ 1900mV / 50mV */
	val = (min_uV - 1750001) / 50000;
	else { /* 2700mV ~ 2850mV / 50mV */
	val = (min_uV - 2650001) / 50000;
	val += 3;
	}
	break;
	case PM8607_ID_LDO12:
	if (min_uV < 2700000) { /* 1800mV ~ 1900mV / 100mV */
	if (min_uV <= 1200000)
	val = 8; /* 1200mV */
	else if (min_uV <= 1800000)
	val = 0; /* 1800mV */
	else if (min_uV <= 1900000)
	val = (min_uV - 1700001) / 100000;
	else
	val = 2; /* 2700mV */
	} else { /* 2700mV ~ 3100mV / 100mV */
	if (min_uV <= 3100000) {
	val = (min_uV - 2600001) / 100000;
	val += 2;
	} else if (min_uV <= 3300000)
	val = 7;
	else
	val = -EINVAL;
	}
	break;
	case PM8607_ID_LDO2:
	case PM8607_ID_LDO3:
	case PM8607_ID_LDO9:
	if (min_uV < 2700000) { /* 1800mV ~ 1900mV / 50mV */
	if (min_uV <= 1800000)
	val = 0;
	else if (min_uV <= 1900000)
	val = (min_uV - 1750001) / 50000;
	else
	val = 3; /* 2700mV */
	} else { /* 2700mV ~ 2850mV / 50mV */
	if (min_uV <= 2850000) {
	val = (min_uV - 2650001) / 50000;
	val += 3;
	} else if (min_uV <= 3300000)
	val = 7;
	else
	val = -EINVAL;
	}
	break;
	case PM8607_ID_LDO4:
	if (min_uV < 2700000) { /* 1800mV ~ 1900mV / 50mV */
	if (min_uV <= 1800000)
	val = 0;
	else if (min_uV <= 1900000)
	val = (min_uV - 1750001) / 50000;
	else
	val = 3; /* 2700mV */
	} else { /* 2700mV ~ 2800mV / 50mV */
	if (min_uV <= 2850000) {
	val = (min_uV - 2650001) / 50000;
	val += 3;
	} else if (min_uV <= 2900000)
	val = 6;
	else if (min_uV <= 3300000)
	val = 7;
	else
	val = -EINVAL;
	}
	break;
	case PM8607_ID_LDO6:
	if (min_uV < 2600000) { /* 1800mV ~ 1850mV / 50mV */
	if (min_uV <= 1800000)
	val = 0;
	else if (min_uV <= 1850000)
	val = (min_uV - 1750001) / 50000;
	else
	val = 2; /* 2600mV */
	} else { /* 2600mV ~ 2800mV / 50mV */
	if (min_uV <= 2800000) {
	val = (min_uV - 2550001) / 50000;
	val += 2;
	} else if (min_uV <= 3300000)
	val = 7;
	else
	val = -EINVAL;
	}
	break;
	case PM8607_ID_LDO14:
	if (min_uV < 2700000) { /* 1800mV ~ 1850mV / 50mV */
	if (min_uV <= 1800000)
	val = 0;
	else if (min_uV <= 1850000)
	val = (min_uV - 1750001) / 50000;
	else
	val = 2; /* 2700mV */
	} else { /* 2700mV ~ 2900mV / 50mV */
	if (min_uV <= 2900000) {
	val = (min_uV - 2650001) / 50000;
	val += 2;
	} else if (min_uV <= 3300000)
	val = 7;
	else
	val = -EINVAL;
	}
	break;
	}
	if (val >= 0) {
	ret = pm8607_list_voltage(rdev, val);
	if (ret > max_uV) {
	pr_err("exceed voltage range (%d %d) uV",
	min_uV, max_uV);
	return -EINVAL;
	}
	} else
	pr_err("invalid voltage range (%d %d) uV", min_uV, max_uV);
	return val;
	}

	static int pm8607_set_voltage(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
	uint8_t val, mask;
	int ret;

	if (check_range(info, min_uV, max_uV)) {
	pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
	return -EINVAL;
	}

	ret = choose_voltage(rdev, min_uV, max_uV);
	if (ret < 0)
	return -EINVAL;
	val = (uint8_t)(ret << info->vol_shift);
	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;

	ret = pm860x_set_bits(info->i2c, info->vol_reg, mask, val);
	if (ret)
	return ret;
	switch (info->desc.id) {
	case PM8607_ID_BUCK1:
	case PM8607_ID_BUCK3:
	ret = pm860x_set_bits(info->i2c, info->update_reg,
	1 << info->update_bit,
	1 << info->update_bit);
	break;
	}
	return ret;
	}

	static int pm8607_get_voltage(struct regulator_dev *rdev)
	{
	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
	uint8_t val, mask;
	int ret;

	ret = pm860x_reg_read(info->i2c, info->vol_reg);
	if (ret < 0)
	return ret;

	mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
	val = ((unsigned char)ret & mask) >> info->vol_shift;

	return pm8607_list_voltage(rdev, val);
	}

	static int pm8607_enable(struct regulator_dev *rdev)
	{
	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);

	return pm860x_set_bits(info->i2c, info->enable_reg,
	1 << info->enable_bit,
	1 << info->enable_bit);
	}

	static int pm8607_disable(struct regulator_dev *rdev)
	{
	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);

	return pm860x_set_bits(info->i2c, info->enable_reg,
	1 << info->enable_bit, 0);
	}

	static int pm8607_is_enabled(struct regulator_dev *rdev)
	{
	struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
	int ret;

	ret = pm860x_reg_read(info->i2c, info->enable_reg);
	if (ret < 0)
	return ret;

	return !!((unsigned char)ret & (1 << info->enable_bit));
	}

	static struct regulator_ops pm8607_regulator_ops = {
	.set_voltage = pm8607_set_voltage,
	.get_voltage = pm8607_get_voltage,
	.enable = pm8607_enable,
	.disable = pm8607_disable,
	.is_enabled = pm8607_is_enabled,
	};

	#define PM8607_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
	{ \
	.desc = { \
	.name = "BUCK" #_id, \
	.ops = &pm8607_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = PM8607_ID_BUCK##_id, \
	.owner = THIS_MODULE, \
	}, \
	.min_uV = (min) * 1000, \
	.max_uV = (max) * 1000, \
	.step_uV = (step) * 1000, \
	.vol_reg = PM8607_##vreg, \
	.vol_shift = (0), \
	.vol_nbits = (nbits), \
	.update_reg = PM8607_##ureg, \
	.update_bit = (ubit), \
	.enable_reg = PM8607_##ereg, \
	.enable_bit = (ebit), \
	.slope_double = (0), \
	}

	#define PM8607_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
	{ \
	.desc = { \
	.name = "LDO" #_id, \
	.ops = &pm8607_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = PM8607_ID_LDO##_id, \
	.owner = THIS_MODULE, \
	}, \
	.min_uV = (min) * 1000, \
	.max_uV = (max) * 1000, \
	.step_uV = (step) * 1000, \
	.vol_reg = PM8607_##vreg, \
	.vol_shift = (shift), \
	.vol_nbits = (nbits), \
	.enable_reg = PM8607_##ereg, \
	.enable_bit = (ebit), \
	.slope_double = (0), \
	}

	static struct pm8607_regulator_info pm8607_regulator_info[] = {
	PM8607_DVC(1, 0, 1500, 25, BUCK1, 6, GO, 0, SUPPLIES_EN11, 0),
	PM8607_DVC(3, 0, 1500, 25, BUCK3, 6, GO, 2, SUPPLIES_EN11, 2),

	PM8607_LDO(1 , 1200, 2800, 0, LDO1 , 0, 2, SUPPLIES_EN11, 3),
	PM8607_LDO(2 , 1800, 3300, 0, LDO2 , 0, 3, SUPPLIES_EN11, 4),
	PM8607_LDO(3 , 1800, 3300, 0, LDO3 , 0, 3, SUPPLIES_EN11, 5),
	PM8607_LDO(4 , 1800, 3300, 0, LDO4 , 0, 3, SUPPLIES_EN11, 6),
	PM8607_LDO(5 , 2900, 3300, 0, LDO5 , 0, 2, SUPPLIES_EN11, 7),
	PM8607_LDO(6 , 1800, 3300, 0, LDO6 , 0, 3, SUPPLIES_EN12, 0),
	PM8607_LDO(7 , 1800, 2900, 0, LDO7 , 0, 3, SUPPLIES_EN12, 1),
	PM8607_LDO(8 , 1800, 2900, 0, LDO8 , 0, 3, SUPPLIES_EN12, 2),
	PM8607_LDO(9 , 1800, 3300, 0, LDO9 , 0, 3, SUPPLIES_EN12, 3),
	PM8607_LDO(10, 1200, 3300, 0, LDO10, 0, 4, SUPPLIES_EN11, 4),
	PM8607_LDO(12, 1200, 3300, 0, LDO12, 0, 4, SUPPLIES_EN11, 5),
	PM8607_LDO(14, 1800, 3300, 0, LDO14, 0, 3, SUPPLIES_EN11, 6),
	};

	static inline struct pm8607_regulator_info *find_regulator_info(int id)
	{
	struct pm8607_regulator_info *info;
	int i;

	for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) {
	info = &pm8607_regulator_info[i];
	if (info->desc.id == id)
	return info;
	}
	return NULL;
	}

	static int __devinit pm8607_regulator_probe(struct platform_device *pdev)
	{
	struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
	struct pm860x_platform_data *pdata = chip->dev->platform_data;
	struct pm8607_regulator_info *info = NULL;

	info = find_regulator_info(pdev->id);
	if (info == NULL) {
	dev_err(&pdev->dev, "invalid regulator ID specified\n");
	return -EINVAL;
	}

	info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
	info->chip = chip;

	info->regulator = regulator_register(&info->desc, &pdev->dev,
	pdata->regulator[pdev->id], info);
	if (IS_ERR(info->regulator)) {
	dev_err(&pdev->dev, "failed to register regulator %s\n",
	info->desc.name);
	return PTR_ERR(info->regulator);
	}

	/* check DVC ramp slope double */
	if (info->desc.id == PM8607_ID_BUCK3)
	if (info->chip->buck3_double)
	info->slope_double = 1;

	platform_set_drvdata(pdev, info);
	return 0;
	}

	static int __devexit pm8607_regulator_remove(struct platform_device *pdev)
	{
	struct pm8607_regulator_info *info = platform_get_drvdata(pdev);

	regulator_unregister(info->regulator);
	return 0;
	}

	#define PM8607_REGULATOR_DRIVER(_name) \
	{ \
	.driver = { \
	.name = "88pm8607-" #_name, \
	.owner = THIS_MODULE, \
	}, \
	.probe = pm8607_regulator_probe, \
	.remove = __devexit_p(pm8607_regulator_remove), \
	}

	static struct platform_driver pm8607_regulator_driver[] = {
	PM8607_REGULATOR_DRIVER(buck1),
	PM8607_REGULATOR_DRIVER(buck2),
	PM8607_REGULATOR_DRIVER(buck3),
	PM8607_REGULATOR_DRIVER(ldo1),
	PM8607_REGULATOR_DRIVER(ldo2),
	PM8607_REGULATOR_DRIVER(ldo3),
	PM8607_REGULATOR_DRIVER(ldo4),
	PM8607_REGULATOR_DRIVER(ldo5),
	PM8607_REGULATOR_DRIVER(ldo6),
	PM8607_REGULATOR_DRIVER(ldo7),
	PM8607_REGULATOR_DRIVER(ldo8),
	PM8607_REGULATOR_DRIVER(ldo9),
	PM8607_REGULATOR_DRIVER(ldo10),
	PM8607_REGULATOR_DRIVER(ldo12),
	PM8607_REGULATOR_DRIVER(ldo14),
	};

	static int __init pm8607_regulator_init(void)
	{
	int i, count, ret;

	count = ARRAY_SIZE(pm8607_regulator_driver);
	for (i = 0; i < count; i++) {
	ret = platform_driver_register(&pm8607_regulator_driver[i]);
	if (ret != 0)
	pr_err("Failed to register regulator driver: %d\n",
	ret);
	}
	return 0;
	}
	subsys_initcall(pm8607_regulator_init);

	static void __exit pm8607_regulator_exit(void)
	{
	int i, count;

	count = ARRAY_SIZE(pm8607_regulator_driver);
	for (i = 0; i < count; i++)
	platform_driver_unregister(&pm8607_regulator_driver[i]);
	}
	module_exit(pm8607_regulator_exit);

	MODULE_LICENSE("GPL");
	MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
	MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC");
	MODULE_ALIAS("platform:88pm8607-regulator");