Commit d3bf80bf authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6:
  regulator/max1586: fix V3 gain calculation integer overflow
  regulator/max1586: support increased V3 voltage range
  regulator: lp3971 - fix driver link error when built-in.
  LP3971 PMIC regulator driver (updated and combined version)
  regulator: remove driver_data direct access of struct device
  regulator: Set MODULE_ALIAS for regulator drivers
  regulator: Support list_voltage for fixed voltage regulator
  regulator: Move regulator drivers to subsys_initcall()
  regulator: build fix for powerpc - renamed show_state
  regulator: add userspace-consumer driver
  Maxim 1586 regulator driver
parents 9c7cb99a c8f1e502

drivers/regulator/Kconfig

+26 −0
Original line number Diff line number Diff line
@@ -47,6 +47,16 @@ config REGULATOR_VIRTUAL_CONSUMER 


          If unsure, say no.



config REGULATOR_USERSPACE_CONSUMER

	tristate "Userspace regulator consumer support"

	default n

	help

	  There are some classes of devices that are controlled entirely

	  from user space. Usersapce consumer driver provides ability to

	  control power supplies for such devices.



          If unsure, say no.



config REGULATOR_BQ24022

	tristate "TI bq24022 Dual Input 1-Cell Li-Ion Charger IC"

	default n
@@ -56,6 +66,15 @@ config REGULATOR_BQ24022 
	  charging select between 100 mA and 500 mA charging current

	  limit.



config REGULATOR_MAX1586

	tristate "Maxim 1586/1587 voltage regulator"

	depends on I2C

	default n

	help

	  This driver controls a Maxim 1586 or 1587 voltage output

	  regulator via I2C bus. The provided regulator is suitable

	  for PXA27x chips to control VCC_CORE and VCC_USIM voltages.



config REGULATOR_TWL4030

	bool "TI TWL4030/TWL5030/TPS695x0 PMIC"

	depends on TWL4030_CORE
@@ -91,4 +110,11 @@ config REGULATOR_PCF50633 
	 Say Y here to support the voltage regulators and convertors

	 on PCF50633



config REGULATOR_LP3971

	tristate "National Semiconductors LP3971 PMIC regulator driver"

	depends on I2C

	help

	 Say Y here to support the voltage regulators and convertors

	 on National Semiconductors LP3971 PMIC



endif

drivers/regulator/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -6,8 +6,11 @@ 
obj-$(CONFIG_REGULATOR) += core.o

obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o

obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o

obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o



obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o

obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o

obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o

obj-$(CONFIG_REGULATOR_TWL4030) += twl4030-regulator.o

obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o

obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o

drivers/regulator/da903x.c

+1 −1
Original line number Diff line number Diff line
@@ -504,7 +504,7 @@ static int __init da903x_regulator_init(void) 
{

	return platform_driver_register(&da903x_regulator_driver);

}

module_init(da903x_regulator_init);

subsys_initcall(da903x_regulator_init);



static void __exit da903x_regulator_exit(void)

{

drivers/regulator/fixed.c

+16 −2
Original line number Diff line number Diff line
@@ -44,10 +44,22 @@ static int fixed_voltage_get_voltage(struct regulator_dev *dev) 
	return data->microvolts;

}



static int fixed_voltage_list_voltage(struct regulator_dev *dev,

				      unsigned selector)

{

	struct fixed_voltage_data *data = rdev_get_drvdata(dev);



	if (selector != 0)

		return -EINVAL;



	return data->microvolts;

}



static struct regulator_ops fixed_voltage_ops = {

	.is_enabled = fixed_voltage_is_enabled,

	.enable = fixed_voltage_enable,

	.get_voltage = fixed_voltage_get_voltage,

	.list_voltage = fixed_voltage_list_voltage,

};



static int regulator_fixed_voltage_probe(struct platform_device *pdev)
@@ -69,7 +81,8 @@ static int regulator_fixed_voltage_probe(struct platform_device *pdev) 
	}

	drvdata->desc.type = REGULATOR_VOLTAGE;

	drvdata->desc.owner = THIS_MODULE;

	drvdata->desc.ops = &fixed_voltage_ops,

	drvdata->desc.ops = &fixed_voltage_ops;

	drvdata->desc.n_voltages = 1;



	drvdata->microvolts = config->microvolts;
@@ -117,7 +130,7 @@ static int __init regulator_fixed_voltage_init(void) 
{

	return platform_driver_register(&regulator_fixed_voltage_driver);

}

module_init(regulator_fixed_voltage_init);

subsys_initcall(regulator_fixed_voltage_init);



static void __exit regulator_fixed_voltage_exit(void)

{
@@ -128,3 +141,4 @@ module_exit(regulator_fixed_voltage_exit); 
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");

MODULE_DESCRIPTION("Fixed voltage regulator");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:reg-fixed-voltage");

drivers/regulator/lp3971.c

0 → 100644
+562 −0
Original line number Diff line number Diff line 
/*

 * Regulator driver for National Semiconductors LP3971 PMIC chip

 *

 *  Copyright (C) 2009 Samsung Electronics

 *  Author: Marek Szyprowski <m.szyprowski@samsung.com>

 *

 * Based on wm8350.c

 *

 * 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/bug.h>

#include <linux/err.h>

#include <linux/i2c.h>

#include <linux/kernel.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/lp3971.h>



struct lp3971 {

	struct device *dev;

	struct mutex io_lock;

	struct i2c_client *i2c;

	int num_regulators;

	struct regulator_dev **rdev;

};



static u8 lp3971_reg_read(struct lp3971 *lp3971, u8 reg);

static int lp3971_set_bits(struct lp3971 *lp3971, u8 reg, u16 mask, u16 val);



#define LP3971_SYS_CONTROL1_REG 0x07



/* System control register 1 initial value,

   bits 4 and 5 are EPROM programmable */

#define SYS_CONTROL1_INIT_VAL 0x40

#define SYS_CONTROL1_INIT_MASK 0xCF



#define LP3971_BUCK_VOL_ENABLE_REG 0x10

#define LP3971_BUCK_VOL_CHANGE_REG 0x20



/*	Voltage control registers shift:

	LP3971_BUCK1 -> 0

	LP3971_BUCK2 -> 4

	LP3971_BUCK3 -> 6

*/

#define BUCK_VOL_CHANGE_SHIFT(x) (((1 << x) & ~0x01) << 1)

#define BUCK_VOL_CHANGE_FLAG_GO 0x01

#define BUCK_VOL_CHANGE_FLAG_TARGET 0x02

#define BUCK_VOL_CHANGE_FLAG_MASK 0x03



#define LP3971_BUCK1_BASE 0x23

#define LP3971_BUCK2_BASE 0x29

#define LP3971_BUCK3_BASE 0x32



const static int buck_base_addr[] = {

	LP3971_BUCK1_BASE,

	LP3971_BUCK2_BASE,

	LP3971_BUCK3_BASE,

};



#define LP3971_BUCK_TARGET_VOL1_REG(x) (buck_base_addr[x])

#define LP3971_BUCK_TARGET_VOL2_REG(x) (buck_base_addr[x]+1)



const static int buck_voltage_map[] = {

	   0,  800,  850,  900,  950, 1000, 1050, 1100,

	1150, 1200, 1250, 1300, 1350, 1400, 1450, 1500,

	1550, 1600, 1650, 1700, 1800, 1900, 2500, 2800,

	3000, 3300,

};



#define BUCK_TARGET_VOL_MASK 0x3f

#define BUCK_TARGET_VOL_MIN_IDX 0x01

#define BUCK_TARGET_VOL_MAX_IDX 0x19



#define LP3971_BUCK_RAMP_REG(x)	(buck_base_addr[x]+2)



#define LP3971_LDO_ENABLE_REG 0x12

#define LP3971_LDO_VOL_CONTR_BASE 0x39



/*	Voltage control registers:

	LP3971_LDO1 -> LP3971_LDO_VOL_CONTR_BASE + 0

	LP3971_LDO2 -> LP3971_LDO_VOL_CONTR_BASE + 0

	LP3971_LDO3 -> LP3971_LDO_VOL_CONTR_BASE + 1

	LP3971_LDO4 -> LP3971_LDO_VOL_CONTR_BASE + 1

	LP3971_LDO5 -> LP3971_LDO_VOL_CONTR_BASE + 2

*/

#define LP3971_LDO_VOL_CONTR_REG(x)	(LP3971_LDO_VOL_CONTR_BASE + (x >> 1))



/*	Voltage control registers shift:

	LP3971_LDO1 -> 0, LP3971_LDO2 -> 4

	LP3971_LDO3 -> 0, LP3971_LDO4 -> 4

	LP3971_LDO5 -> 0

*/

#define LDO_VOL_CONTR_SHIFT(x) ((x & 1) << 2)

#define LDO_VOL_CONTR_MASK 0x0f



const static int ldo45_voltage_map[] = {

	1000, 1050, 1100, 1150, 1200, 1250, 1300, 1350,

	1400, 1500, 1800, 1900, 2500, 2800, 3000, 3300,

};



const static int ldo123_voltage_map[] = {

	1800, 1900, 2000, 2100, 2200, 2300, 2400, 2500,

	2600, 2700, 2800, 2900, 3000, 3100, 3200, 3300,

};



const static int *ldo_voltage_map[] = {

	ldo123_voltage_map, /* LDO1 */

	ldo123_voltage_map, /* LDO2 */

	ldo123_voltage_map, /* LDO3 */

	ldo45_voltage_map, /* LDO4 */

	ldo45_voltage_map, /* LDO5 */

};



#define LDO_VOL_VALUE_MAP(x) (ldo_voltage_map[(x - LP3971_LDO1)])



#define LDO_VOL_MIN_IDX 0x00

#define LDO_VOL_MAX_IDX 0x0f



static int lp3971_ldo_list_voltage(struct regulator_dev *dev, unsigned index)

{

	int ldo = rdev_get_id(dev) - LP3971_LDO1;

	return 1000 * LDO_VOL_VALUE_MAP(ldo)[index];

}



static int lp3971_ldo_is_enabled(struct regulator_dev *dev)

{

	struct lp3971 *lp3971 = rdev_get_drvdata(dev);

	int ldo = rdev_get_id(dev) - LP3971_LDO1;

	u16 mask = 1 << (1 + ldo);

	u16 val;



	val = lp3971_reg_read(lp3971, LP3971_LDO_ENABLE_REG);

	return (val & mask) != 0;

}



static int lp3971_ldo_enable(struct regulator_dev *dev)

{

	struct lp3971 *lp3971 = rdev_get_drvdata(dev);

	int ldo = rdev_get_id(dev) - LP3971_LDO1;

	u16 mask = 1 << (1 + ldo);



	return lp3971_set_bits(lp3971, LP3971_LDO_ENABLE_REG, mask, mask);

}



static int lp3971_ldo_disable(struct regulator_dev *dev)

{

	struct lp3971 *lp3971 = rdev_get_drvdata(dev);

	int ldo = rdev_get_id(dev) - LP3971_LDO1;

	u16 mask = 1 << (1 + ldo);



	return lp3971_set_bits(lp3971, LP3971_LDO_ENABLE_REG, mask, 0);

}



static int lp3971_ldo_get_voltage(struct regulator_dev *dev)

{

	struct lp3971 *lp3971 = rdev_get_drvdata(dev);

	int ldo = rdev_get_id(dev) - LP3971_LDO1;

	u16 val, reg;



	reg = lp3971_reg_read(lp3971, LP3971_LDO_VOL_CONTR_REG(ldo));

	val = (reg >> LDO_VOL_CONTR_SHIFT(ldo)) & LDO_VOL_CONTR_MASK;



	return 1000 * LDO_VOL_VALUE_MAP(ldo)[val];

}



static int lp3971_ldo_set_voltage(struct regulator_dev *dev,

				  int min_uV, int max_uV)

{

	struct lp3971 *lp3971 = rdev_get_drvdata(dev);

	int ldo = rdev_get_id(dev) - LP3971_LDO1;

	int min_vol = min_uV / 1000, max_vol = max_uV / 1000;

	const int *vol_map = LDO_VOL_VALUE_MAP(ldo);

	u16 val;



	if (min_vol < vol_map[LDO_VOL_MIN_IDX] ||

	    min_vol > vol_map[LDO_VOL_MAX_IDX])

		return -EINVAL;



	for (val = LDO_VOL_MIN_IDX; val <= LDO_VOL_MAX_IDX; val++)

		if (vol_map[val] >= min_vol)

			break;



	if (vol_map[val] > max_vol)

		return -EINVAL;



	return lp3971_set_bits(lp3971, LP3971_LDO_VOL_CONTR_REG(ldo),

		LDO_VOL_CONTR_MASK << LDO_VOL_CONTR_SHIFT(ldo), val);

}



static struct regulator_ops lp3971_ldo_ops = {

	.list_voltage = lp3971_ldo_list_voltage,

	.is_enabled = lp3971_ldo_is_enabled,

	.enable = lp3971_ldo_enable,

	.disable = lp3971_ldo_disable,

	.get_voltage = lp3971_ldo_get_voltage,

	.set_voltage = lp3971_ldo_set_voltage,

};



static int lp3971_dcdc_list_voltage(struct regulator_dev *dev, unsigned index)

{

	return 1000 * buck_voltage_map[index];

}



static int lp3971_dcdc_is_enabled(struct regulator_dev *dev)

{

	struct lp3971 *lp3971 = rdev_get_drvdata(dev);

	int buck = rdev_get_id(dev) - LP3971_DCDC1;

	u16 mask = 1 << (buck * 2);

	u16 val;



	val = lp3971_reg_read(lp3971, LP3971_BUCK_VOL_ENABLE_REG);

	return (val & mask) != 0;

}



static int lp3971_dcdc_enable(struct regulator_dev *dev)

{

	struct lp3971 *lp3971 = rdev_get_drvdata(dev);

	int buck = rdev_get_id(dev) - LP3971_DCDC1;

	u16 mask = 1 << (buck * 2);



	return lp3971_set_bits(lp3971, LP3971_BUCK_VOL_ENABLE_REG, mask, mask);

}



static int lp3971_dcdc_disable(struct regulator_dev *dev)

{

	struct lp3971 *lp3971 = rdev_get_drvdata(dev);

	int buck = rdev_get_id(dev) - LP3971_DCDC1;

	u16 mask = 1 << (buck * 2);



	return lp3971_set_bits(lp3971, LP3971_BUCK_VOL_ENABLE_REG, mask, 0);

}



static int lp3971_dcdc_get_voltage(struct regulator_dev *dev)

{

	struct lp3971 *lp3971 = rdev_get_drvdata(dev);

	int buck = rdev_get_id(dev) - LP3971_DCDC1;

	u16 reg;

	int val;



	reg = lp3971_reg_read(lp3971, LP3971_BUCK_TARGET_VOL1_REG(buck));

	reg &= BUCK_TARGET_VOL_MASK;



	if (reg <= BUCK_TARGET_VOL_MAX_IDX)

		val = 1000 * buck_voltage_map[reg];

	else {

		val = 0;

		dev_warn(&dev->dev, "chip reported incorrect voltage value.\n");

	}



	return val;

}



static int lp3971_dcdc_set_voltage(struct regulator_dev *dev,

				  int min_uV, int max_uV)

{

	struct lp3971 *lp3971 = rdev_get_drvdata(dev);

	int buck = rdev_get_id(dev) - LP3971_DCDC1;

	int min_vol = min_uV / 1000, max_vol = max_uV / 1000;

	const int *vol_map = buck_voltage_map;

	u16 val;

	int ret;



	if (min_vol < vol_map[BUCK_TARGET_VOL_MIN_IDX] ||

	    min_vol > vol_map[BUCK_TARGET_VOL_MAX_IDX])

		return -EINVAL;



	for (val = BUCK_TARGET_VOL_MIN_IDX; val <= BUCK_TARGET_VOL_MAX_IDX;

	     val++)

		if (vol_map[val] >= min_vol)

			break;



	if (vol_map[val] > max_vol)

		return -EINVAL;



	ret = lp3971_set_bits(lp3971, LP3971_BUCK_TARGET_VOL1_REG(buck),

	       BUCK_TARGET_VOL_MASK, val);

	if (ret)

		return ret;



	ret = lp3971_set_bits(lp3971, LP3971_BUCK_VOL_CHANGE_REG,

	       BUCK_VOL_CHANGE_FLAG_MASK << BUCK_VOL_CHANGE_SHIFT(buck),

	       BUCK_VOL_CHANGE_FLAG_GO << BUCK_VOL_CHANGE_SHIFT(buck));

	if (ret)

		return ret;



	return lp3971_set_bits(lp3971, LP3971_BUCK_VOL_CHANGE_REG,

	       BUCK_VOL_CHANGE_FLAG_MASK << BUCK_VOL_CHANGE_SHIFT(buck),

	       0 << BUCK_VOL_CHANGE_SHIFT(buck));

}



static struct regulator_ops lp3971_dcdc_ops = {

	.list_voltage = lp3971_dcdc_list_voltage,

	.is_enabled = lp3971_dcdc_is_enabled,

	.enable = lp3971_dcdc_enable,

	.disable = lp3971_dcdc_disable,

	.get_voltage = lp3971_dcdc_get_voltage,

	.set_voltage = lp3971_dcdc_set_voltage,

};



static struct regulator_desc regulators[] = {

	{

		.name = "LDO1",

		.id = LP3971_LDO1,

		.ops = &lp3971_ldo_ops,

		.n_voltages = ARRAY_SIZE(ldo123_voltage_map),

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

	},

	{

		.name = "LDO2",

		.id = LP3971_LDO2,

		.ops = &lp3971_ldo_ops,

		.n_voltages = ARRAY_SIZE(ldo123_voltage_map),

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

	},

	{

		.name = "LDO3",

		.id = LP3971_LDO3,

		.ops = &lp3971_ldo_ops,

		.n_voltages = ARRAY_SIZE(ldo123_voltage_map),

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

	},

	{

		.name = "LDO4",

		.id = LP3971_LDO4,

		.ops = &lp3971_ldo_ops,

		.n_voltages = ARRAY_SIZE(ldo45_voltage_map),

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

	},

	{

		.name = "LDO5",

		.id = LP3971_LDO5,

		.ops = &lp3971_ldo_ops,

		.n_voltages = ARRAY_SIZE(ldo45_voltage_map),

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

	},

	{

		.name = "DCDC1",

		.id = LP3971_DCDC1,

		.ops = &lp3971_dcdc_ops,

		.n_voltages = ARRAY_SIZE(buck_voltage_map),

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

	},

	{

		.name = "DCDC2",

		.id = LP3971_DCDC2,

		.ops = &lp3971_dcdc_ops,

		.n_voltages = ARRAY_SIZE(buck_voltage_map),

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

	},

	{

		.name = "DCDC3",

		.id = LP3971_DCDC3,

		.ops = &lp3971_dcdc_ops,

		.n_voltages = ARRAY_SIZE(buck_voltage_map),

		.type = REGULATOR_VOLTAGE,

		.owner = THIS_MODULE,

	},

};



static int lp3971_i2c_read(struct i2c_client *i2c, char reg, int count,

	u16 *dest)

{

	int ret;



	if (count != 1)

		return -EIO;

	ret = i2c_smbus_read_byte_data(i2c, reg);

	if (ret < 0 || count != 1)

		return -EIO;



	*dest = ret;

	return 0;

}



static int lp3971_i2c_write(struct i2c_client *i2c, char reg, int count,

	const u16 *src)

{

	int ret;



	if (count != 1)

		return -EIO;

	ret = i2c_smbus_write_byte_data(i2c, reg, *src);

	if (ret >= 0)

		return 0;



	return ret;

}



static u8 lp3971_reg_read(struct lp3971 *lp3971, u8 reg)

{

	u16 val = 0;



	mutex_lock(&lp3971->io_lock);



	lp3971_i2c_read(lp3971->i2c, reg, 1, &val);



	dev_dbg(lp3971->dev, "reg read 0x%02x -> 0x%02x\n", (int)reg,

		(unsigned)val&0xff);



	mutex_unlock(&lp3971->io_lock);



	return val & 0xff;

}



static int lp3971_set_bits(struct lp3971 *lp3971, u8 reg, u16 mask, u16 val)

{

	u16 tmp;

	int ret;



	mutex_lock(&lp3971->io_lock);



	ret = lp3971_i2c_read(lp3971->i2c, reg, 1, &tmp);

	tmp = (tmp & ~mask) | val;

	if (ret == 0) {

		ret = lp3971_i2c_write(lp3971->i2c, reg, 1, &tmp);

		dev_dbg(lp3971->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg,

			(unsigned)val&0xff);

	}

	mutex_unlock(&lp3971->io_lock);



	return ret;

}



static int setup_regulators(struct lp3971 *lp3971,

	struct lp3971_platform_data *pdata)

{

	int i, err;

	int num_regulators = pdata->num_regulators;

	lp3971->num_regulators = num_regulators;

	lp3971->rdev = kzalloc(sizeof(struct regulator_dev *) * num_regulators,

		GFP_KERNEL);



	/* Instantiate the regulators */

	for (i = 0; i < num_regulators; i++) {

		int id = pdata->regulators[i].id;

		lp3971->rdev[i] = regulator_register(&regulators[id],

			lp3971->dev, pdata->regulators[i].initdata, lp3971);



		err = IS_ERR(lp3971->rdev[i]);

		if (err) {

			dev_err(lp3971->dev, "regulator init failed: %d\n",

				err);

			goto error;

		}

	}



	return 0;

error:

	for (i = 0; i < num_regulators; i++)

		if (lp3971->rdev[i])

			regulator_unregister(lp3971->rdev[i]);

	kfree(lp3971->rdev);

	lp3971->rdev = NULL;

	return err;

}



static int __devinit lp3971_i2c_probe(struct i2c_client *i2c,

			    const struct i2c_device_id *id)

{

	struct lp3971 *lp3971;

	struct lp3971_platform_data *pdata = i2c->dev.platform_data;

	int ret;

	u16 val;



	lp3971 = kzalloc(sizeof(struct lp3971), GFP_KERNEL);

	if (lp3971 == NULL) {

		ret = -ENOMEM;

		goto err;

	}



	lp3971->i2c = i2c;

	lp3971->dev = &i2c->dev;

	i2c_set_clientdata(i2c, lp3971);



	mutex_init(&lp3971->io_lock);



	/* Detect LP3971 */

	ret = lp3971_i2c_read(i2c, LP3971_SYS_CONTROL1_REG, 1, &val);

	if (ret == 0 && (val & SYS_CONTROL1_INIT_MASK) != SYS_CONTROL1_INIT_VAL)

		ret = -ENODEV;

	if (ret < 0) {

		dev_err(&i2c->dev, "failed to detect device\n");

		goto err_detect;

	}



	if (pdata) {

		ret = setup_regulators(lp3971, pdata);

		if (ret < 0)

			goto err_detect;

	} else

		dev_warn(lp3971->dev, "No platform init data supplied\n");



	return 0;



err_detect:

	i2c_set_clientdata(i2c, NULL);

	kfree(lp3971);

err:

	return ret;

}



static int __devexit lp3971_i2c_remove(struct i2c_client *i2c)

{

	struct lp3971 *lp3971 = i2c_get_clientdata(i2c);

	int i;

	for (i = 0; i < lp3971->num_regulators; i++)

		if (lp3971->rdev[i])

			regulator_unregister(lp3971->rdev[i]);

	kfree(lp3971->rdev);

	i2c_set_clientdata(i2c, NULL);

	kfree(lp3971);



	return 0;

}



static const struct i2c_device_id lp3971_i2c_id[] = {

       { "lp3971", 0 },

       { }

};

MODULE_DEVICE_TABLE(i2c, lp3971_i2c_id);



static struct i2c_driver lp3971_i2c_driver = {

	.driver = {

		.name = "LP3971",

		.owner = THIS_MODULE,

	},

	.probe    = lp3971_i2c_probe,

	.remove   = __devexit_p(lp3971_i2c_remove),

	.id_table = lp3971_i2c_id,

};



static int __init lp3971_module_init(void)

{

	int ret = -ENODEV;



	ret = i2c_add_driver(&lp3971_i2c_driver);

	if (ret != 0)

		pr_err("Failed to register I2C driver: %d\n", ret);



	return ret;

}

module_init(lp3971_module_init);



static void __exit lp3971_module_exit(void)

{

	i2c_del_driver(&lp3971_i2c_driver);

}

module_exit(lp3971_module_exit);



MODULE_LICENSE("GPL");

MODULE_AUTHOR("Marek Szyprowski <m.szyprowski@samsung.com>");

MODULE_DESCRIPTION("LP3971 PMIC driver");

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