[linux-block.git] / drivers / regulator / max8925-regulator.c

/*
 * Regulators driver for Maxim max8925
 *
 * 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/module.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/max8925.h>

#define SD1_DVM_VMIN		850000
#define SD1_DVM_VMAX		1000000
#define SD1_DVM_STEP		50000
#define SD1_DVM_SHIFT		5		/* SDCTL1 bit5 */
#define SD1_DVM_EN		6		/* SDV1 bit 6 */

/* bit definitions in LDO control registers */
#define LDO_SEQ_I2C		0x7		/* Power U/D by i2c */
#define LDO_SEQ_MASK		0x7		/* Power U/D sequence mask */
#define LDO_SEQ_SHIFT		2		/* Power U/D sequence offset */
#define LDO_I2C_EN		0x1		/* Enable by i2c */
#define LDO_I2C_EN_MASK		0x1		/* Enable mask by i2c */
#define LDO_I2C_EN_SHIFT	0		/* Enable offset by i2c */

struct max8925_regulator_info {
	struct regulator_desc	desc;
	struct regulator_dev	*regulator;
	struct i2c_client	*i2c;
	struct max8925_chip	*chip;

	int	min_uV;
	int	max_uV;
	int	step_uV;
	int	vol_reg;
	int	enable_reg;
};

static inline int check_range(struct max8925_regulator_info *info,
			      int min_uV, int max_uV)
{
	if (min_uV < info->min_uV || min_uV > info->max_uV)
		return -EINVAL;

	return 0;
}

static int max8925_list_voltage(struct regulator_dev *rdev, unsigned index)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	return info->min_uV + index * info->step_uV;
}

static int max8925_set_voltage(struct regulator_dev *rdev,
			       int min_uV, int max_uV, unsigned int *selector)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	unsigned char data, mask;

	if (check_range(info, min_uV, max_uV)) {
		dev_err(info->chip->dev, "invalid voltage range (%d, %d) uV\n",
			min_uV, max_uV);
		return -EINVAL;
	}
	data = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
	*selector = data;
	mask = rdev->desc->n_voltages - 1;

	return max8925_set_bits(info->i2c, info->vol_reg, mask, data);
}

static int max8925_get_voltage(struct regulator_dev *rdev)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	unsigned char data, mask;
	int ret;

	ret = max8925_reg_read(info->i2c, info->vol_reg);
	if (ret < 0)
		return ret;
	mask = rdev->desc->n_voltages - 1;
	data = ret & mask;

	return max8925_list_voltage(rdev, data);
}

static int max8925_enable(struct regulator_dev *rdev)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);

	return max8925_set_bits(info->i2c, info->enable_reg,
				LDO_SEQ_MASK << LDO_SEQ_SHIFT |
				LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT,
				LDO_SEQ_I2C << LDO_SEQ_SHIFT |
				LDO_I2C_EN << LDO_I2C_EN_SHIFT);
}

static int max8925_disable(struct regulator_dev *rdev)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);

	return max8925_set_bits(info->i2c, info->enable_reg,
				LDO_SEQ_MASK << LDO_SEQ_SHIFT |
				LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT,
				LDO_SEQ_I2C << LDO_SEQ_SHIFT);
}

static int max8925_is_enabled(struct regulator_dev *rdev)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	int ldo_seq, ret;

	ret = max8925_reg_read(info->i2c, info->enable_reg);
	if (ret < 0)
		return ret;
	ldo_seq = (ret >> LDO_SEQ_SHIFT) & LDO_SEQ_MASK;
	if (ldo_seq != LDO_SEQ_I2C)
		return 1;
	else
		return ret & (LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT);
}

static int max8925_set_dvm_voltage(struct regulator_dev *rdev, int uV)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	unsigned char data, mask;

	if (uV < SD1_DVM_VMIN || uV > SD1_DVM_VMAX)
		return -EINVAL;

	data = DIV_ROUND_UP(uV - SD1_DVM_VMIN, SD1_DVM_STEP);
	data <<= SD1_DVM_SHIFT;
	mask = 3 << SD1_DVM_SHIFT;

	return max8925_set_bits(info->i2c, info->enable_reg, mask, data);
}

static int max8925_set_dvm_enable(struct regulator_dev *rdev)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);

	return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN,
				1 << SD1_DVM_EN);
}

static int max8925_set_dvm_disable(struct regulator_dev *rdev)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);

	return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN, 0);
}

static struct regulator_ops max8925_regulator_sdv_ops = {
	.list_voltage		= max8925_list_voltage,
	.set_voltage		= max8925_set_voltage,
	.get_voltage		= max8925_get_voltage,
	.enable			= max8925_enable,
	.disable		= max8925_disable,
	.is_enabled		= max8925_is_enabled,
	.set_suspend_voltage	= max8925_set_dvm_voltage,
	.set_suspend_enable	= max8925_set_dvm_enable,
	.set_suspend_disable	= max8925_set_dvm_disable,
};

static struct regulator_ops max8925_regulator_ldo_ops = {
	.list_voltage		= max8925_list_voltage,
	.set_voltage		= max8925_set_voltage,
	.get_voltage		= max8925_get_voltage,
	.enable			= max8925_enable,
	.disable		= max8925_disable,
	.is_enabled		= max8925_is_enabled,
};

#define MAX8925_SDV(_id, min, max, step)			\
{								\
	.desc	= {						\
		.name	= "SDV" #_id,				\
		.ops	= &max8925_regulator_sdv_ops,		\
		.type	= REGULATOR_VOLTAGE,			\
		.id	= MAX8925_ID_SD##_id,			\
		.owner	= THIS_MODULE,				\
		.n_voltages = 64,				\
	},							\
	.min_uV		= min * 1000,				\
	.max_uV		= max * 1000,				\
	.step_uV	= step * 1000,				\
	.vol_reg	= MAX8925_SDV##_id,			\
	.enable_reg	= MAX8925_SDCTL##_id,			\
}

#define MAX8925_LDO(_id, min, max, step)			\
{								\
	.desc	= {						\
		.name	= "LDO" #_id,				\
		.ops	= &max8925_regulator_ldo_ops,		\
		.type	= REGULATOR_VOLTAGE,			\
		.id	= MAX8925_ID_LDO##_id,			\
		.owner	= THIS_MODULE,				\
		.n_voltages = 64,				\
	},							\
	.min_uV		= min * 1000,				\
	.max_uV		= max * 1000,				\
	.step_uV	= step * 1000,				\
	.vol_reg	= MAX8925_LDOVOUT##_id,			\
	.enable_reg	= MAX8925_LDOCTL##_id,			\
}

static struct max8925_regulator_info max8925_regulator_info[] = {
	MAX8925_SDV(1, 637.5, 1425, 12.5),
	MAX8925_SDV(2,   650, 2225,   25),
	MAX8925_SDV(3,   750, 3900,   50),

	MAX8925_LDO(1,  750, 3900, 50),
	MAX8925_LDO(2,  650, 2250, 25),
	MAX8925_LDO(3,  650, 2250, 25),
	MAX8925_LDO(4,  750, 3900, 50),
	MAX8925_LDO(5,  750, 3900, 50),
	MAX8925_LDO(6,  750, 3900, 50),
	MAX8925_LDO(7,  750, 3900, 50),
	MAX8925_LDO(8,  750, 3900, 50),
	MAX8925_LDO(9,  750, 3900, 50),
	MAX8925_LDO(10, 750, 3900, 50),
	MAX8925_LDO(11, 750, 3900, 50),
	MAX8925_LDO(12, 750, 3900, 50),
	MAX8925_LDO(13, 750, 3900, 50),
	MAX8925_LDO(14, 750, 3900, 50),
	MAX8925_LDO(15, 750, 3900, 50),
	MAX8925_LDO(16, 750, 3900, 50),
	MAX8925_LDO(17, 650, 2250, 25),
	MAX8925_LDO(18, 650, 2250, 25),
	MAX8925_LDO(19, 750, 3900, 50),
	MAX8925_LDO(20, 750, 3900, 50),
};

static struct max8925_regulator_info * __devinit find_regulator_info(int id)
{
	struct max8925_regulator_info *ri;
	int i;

	for (i = 0; i < ARRAY_SIZE(max8925_regulator_info); i++) {
		ri = &max8925_regulator_info[i];
		if (ri->desc.id == id)
			return ri;
	}
	return NULL;
}

static int __devinit max8925_regulator_probe(struct platform_device *pdev)
{
	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
	struct max8925_platform_data *pdata = chip->dev->platform_data;
	struct max8925_regulator_info *ri;
	struct regulator_dev *rdev;

	ri = find_regulator_info(pdev->id);
	if (ri == NULL) {
		dev_err(&pdev->dev, "invalid regulator ID specified\n");
		return -EINVAL;
	}
	ri->i2c = chip->i2c;
	ri->chip = chip;

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

	platform_set_drvdata(pdev, rdev);
	return 0;
}

static int __devexit max8925_regulator_remove(struct platform_device *pdev)
{
	struct regulator_dev *rdev = platform_get_drvdata(pdev);

	platform_set_drvdata(pdev, NULL);
	regulator_unregister(rdev);

	return 0;
}

static struct platform_driver max8925_regulator_driver = {
	.driver		= {
		.name	= "max8925-regulator",
		.owner	= THIS_MODULE,
	},
	.probe		= max8925_regulator_probe,
	.remove		= __devexit_p(max8925_regulator_remove),
};

static int __init max8925_regulator_init(void)
{
	return platform_driver_register(&max8925_regulator_driver);
}
subsys_initcall(max8925_regulator_init);

static void __exit max8925_regulator_exit(void)
{
	platform_driver_unregister(&max8925_regulator_driver);
}
module_exit(max8925_regulator_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
MODULE_DESCRIPTION("Regulator Driver for Maxim 8925 PMIC");
MODULE_ALIAS("platform:max8925-regulator");
Commit	Line	Data
08ff6f2a HZ	1	/*
	2	* Regulators driver for Maxim max8925
	3	*
	4	* Copyright (C) 2009 Marvell International Ltd.
	5	* Haojian Zhuang <haojian.zhuang@marvell.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11	#include <linux/kernel.h>
65602c32	12	#include <linux/module.h>
08ff6f2a HZ	13	#include <linux/init.h>
	14	#include <linux/err.h>
	15	#include <linux/i2c.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/regulator/driver.h>
	18	#include <linux/regulator/machine.h>
	19	#include <linux/mfd/max8925.h>
	20
	21	#define SD1_DVM_VMIN 850000
	22	#define SD1_DVM_VMAX 1000000
	23	#define SD1_DVM_STEP 50000
	24	#define SD1_DVM_SHIFT 5 /* SDCTL1 bit5 */
	25	#define SD1_DVM_EN 6 /* SDV1 bit 6 */
	26
65364e9a KL	27	/* bit definitions in LDO control registers */
	28	#define LDO_SEQ_I2C 0x7 /* Power U/D by i2c */
	29	#define LDO_SEQ_MASK 0x7 /* Power U/D sequence mask */
	30	#define LDO_SEQ_SHIFT 2 /* Power U/D sequence offset */
	31	#define LDO_I2C_EN 0x1 /* Enable by i2c */
	32	#define LDO_I2C_EN_MASK 0x1 /* Enable mask by i2c */
	33	#define LDO_I2C_EN_SHIFT 0 /* Enable offset by i2c */
db13c040	34
08ff6f2a HZ	35	struct max8925_regulator_info {
	36	struct regulator_desc desc;
	37	struct regulator_dev *regulator;
	38	struct i2c_client *i2c;
	39	struct max8925_chip *chip;
	40
	41	int min_uV;
	42	int max_uV;
	43	int step_uV;
	44	int vol_reg;
08ff6f2a HZ	45	int enable_reg;
	46	};
	47
	48	static inline int check_range(struct max8925_regulator_info *info,
	49	int min_uV, int max_uV)
	50	{
	51	if (min_uV < info->min_uV \|\| min_uV > info->max_uV)
	52	return -EINVAL;
	53
	54	return 0;
	55	}
	56
	57	static int max8925_list_voltage(struct regulator_dev *rdev, unsigned index)
	58	{
	59	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	60	return info->min_uV + index * info->step_uV;
	61	}
	62
	63	static int max8925_set_voltage(struct regulator_dev *rdev,
3a93f2a9	64	int min_uV, int max_uV, unsigned int *selector)
08ff6f2a HZ	65	{
	66	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	67	unsigned char data, mask;
	68
	69	if (check_range(info, min_uV, max_uV)) {
	70	dev_err(info->chip->dev, "invalid voltage range (%d, %d) uV\n",
	71	min_uV, max_uV);
	72	return -EINVAL;
	73	}
5db6d09a	74	data = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
3a93f2a9	75	*selector = data;
7f52ba77	76	mask = rdev->desc->n_voltages - 1;
08ff6f2a HZ	77
	78	return max8925_set_bits(info->i2c, info->vol_reg, mask, data);
	79	}
	80
	81	static int max8925_get_voltage(struct regulator_dev *rdev)
	82	{
	83	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	84	unsigned char data, mask;
	85	int ret;
	86
	87	ret = max8925_reg_read(info->i2c, info->vol_reg);
	88	if (ret < 0)
	89	return ret;
7f52ba77 AL	90	mask = rdev->desc->n_voltages - 1;
7f52ba77 AL	91	data = ret & mask;
08ff6f2a HZ	92
	93	return max8925_list_voltage(rdev, data);
	94	}
	95
	96	static int max8925_enable(struct regulator_dev *rdev)
	97	{
	98	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	99
	100	return max8925_set_bits(info->i2c, info->enable_reg,
65364e9a KL	101	LDO_SEQ_MASK << LDO_SEQ_SHIFT \|
	102	LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT,
	103	LDO_SEQ_I2C << LDO_SEQ_SHIFT \|
	104	LDO_I2C_EN << LDO_I2C_EN_SHIFT);
08ff6f2a HZ	105	}
	106
	107	static int max8925_disable(struct regulator_dev *rdev)
	108	{
	109	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	110
	111	return max8925_set_bits(info->i2c, info->enable_reg,
65364e9a KL	112	LDO_SEQ_MASK << LDO_SEQ_SHIFT \|
	113	LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT,
	114	LDO_SEQ_I2C << LDO_SEQ_SHIFT);
08ff6f2a HZ	115	}
	116
	117	static int max8925_is_enabled(struct regulator_dev *rdev)
	118	{
	119	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
65364e9a	120	int ldo_seq, ret;
08ff6f2a	121
4b99fef0	122	ret = max8925_reg_read(info->i2c, info->enable_reg);
08ff6f2a HZ	123	if (ret < 0)
08ff6f2a HZ	124	return ret;
65364e9a KL	125	ldo_seq = (ret >> LDO_SEQ_SHIFT) & LDO_SEQ_MASK;
	126	if (ldo_seq != LDO_SEQ_I2C)
	127	return 1;
	128	else
	129	return ret & (LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT);
08ff6f2a HZ	130	}
	131
	132	static int max8925_set_dvm_voltage(struct regulator_dev *rdev, int uV)
	133	{
	134	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	135	unsigned char data, mask;
	136
	137	if (uV < SD1_DVM_VMIN \|\| uV > SD1_DVM_VMAX)
	138	return -EINVAL;
	139
5db6d09a	140	data = DIV_ROUND_UP(uV - SD1_DVM_VMIN, SD1_DVM_STEP);
08ff6f2a HZ	141	data <<= SD1_DVM_SHIFT;
	142	mask = 3 << SD1_DVM_SHIFT;
	143
	144	return max8925_set_bits(info->i2c, info->enable_reg, mask, data);
	145	}
	146
	147	static int max8925_set_dvm_enable(struct regulator_dev *rdev)
	148	{
	149	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	150
	151	return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN,
	152	1 << SD1_DVM_EN);
	153	}
	154
	155	static int max8925_set_dvm_disable(struct regulator_dev *rdev)
	156	{
	157	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	158
	159	return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN, 0);
	160	}
	161
	162	static struct regulator_ops max8925_regulator_sdv_ops = {
42ff9431	163	.list_voltage = max8925_list_voltage,
08ff6f2a HZ	164	.set_voltage = max8925_set_voltage,
	165	.get_voltage = max8925_get_voltage,
	166	.enable = max8925_enable,
	167	.disable = max8925_disable,
	168	.is_enabled = max8925_is_enabled,
	169	.set_suspend_voltage = max8925_set_dvm_voltage,
	170	.set_suspend_enable = max8925_set_dvm_enable,
	171	.set_suspend_disable = max8925_set_dvm_disable,
	172	};
	173
	174	static struct regulator_ops max8925_regulator_ldo_ops = {
42ff9431	175	.list_voltage = max8925_list_voltage,
08ff6f2a HZ	176	.set_voltage = max8925_set_voltage,
	177	.get_voltage = max8925_get_voltage,
	178	.enable = max8925_enable,
	179	.disable = max8925_disable,
	180	.is_enabled = max8925_is_enabled,
	181	};
	182
	183	#define MAX8925_SDV(_id, min, max, step) \
	184	{ \
	185	.desc = { \
	186	.name = "SDV" #_id, \
	187	.ops = &max8925_regulator_sdv_ops, \
	188	.type = REGULATOR_VOLTAGE, \
	189	.id = MAX8925_ID_SD##_id, \
	190	.owner = THIS_MODULE, \
7f52ba77	191	.n_voltages = 64, \
08ff6f2a HZ	192	}, \
	193	.min_uV = min * 1000, \
	194	.max_uV = max * 1000, \
	195	.step_uV = step * 1000, \
	196	.vol_reg = MAX8925_SDV##_id, \
08ff6f2a	197	.enable_reg = MAX8925_SDCTL##_id, \
08ff6f2a HZ	198	}
	199
	200	#define MAX8925_LDO(_id, min, max, step) \
	201	{ \
	202	.desc = { \
	203	.name = "LDO" #_id, \
	204	.ops = &max8925_regulator_ldo_ops, \
	205	.type = REGULATOR_VOLTAGE, \
	206	.id = MAX8925_ID_LDO##_id, \
	207	.owner = THIS_MODULE, \
7f52ba77	208	.n_voltages = 64, \
08ff6f2a HZ	209	}, \
	210	.min_uV = min * 1000, \
	211	.max_uV = max * 1000, \
	212	.step_uV = step * 1000, \
	213	.vol_reg = MAX8925_LDOVOUT##_id, \
08ff6f2a	214	.enable_reg = MAX8925_LDOCTL##_id, \
08ff6f2a HZ	215	}
	216
	217	static struct max8925_regulator_info max8925_regulator_info[] = {
	218	MAX8925_SDV(1, 637.5, 1425, 12.5),
	219	MAX8925_SDV(2, 650, 2225, 25),
	220	MAX8925_SDV(3, 750, 3900, 50),
	221
	222	MAX8925_LDO(1, 750, 3900, 50),
	223	MAX8925_LDO(2, 650, 2250, 25),
	224	MAX8925_LDO(3, 650, 2250, 25),
	225	MAX8925_LDO(4, 750, 3900, 50),
	226	MAX8925_LDO(5, 750, 3900, 50),
	227	MAX8925_LDO(6, 750, 3900, 50),
	228	MAX8925_LDO(7, 750, 3900, 50),
	229	MAX8925_LDO(8, 750, 3900, 50),
	230	MAX8925_LDO(9, 750, 3900, 50),
	231	MAX8925_LDO(10, 750, 3900, 50),
	232	MAX8925_LDO(11, 750, 3900, 50),
	233	MAX8925_LDO(12, 750, 3900, 50),
	234	MAX8925_LDO(13, 750, 3900, 50),
	235	MAX8925_LDO(14, 750, 3900, 50),
	236	MAX8925_LDO(15, 750, 3900, 50),
	237	MAX8925_LDO(16, 750, 3900, 50),
	238	MAX8925_LDO(17, 650, 2250, 25),
	239	MAX8925_LDO(18, 650, 2250, 25),
	240	MAX8925_LDO(19, 750, 3900, 50),
	241	MAX8925_LDO(20, 750, 3900, 50),
	242	};
	243
3fff6c04	244	static struct max8925_regulator_info * __devinit find_regulator_info(int id)
08ff6f2a HZ	245	{
	246	struct max8925_regulator_info *ri;
	247	int i;
	248
	249	for (i = 0; i < ARRAY_SIZE(max8925_regulator_info); i++) {
	250	ri = &max8925_regulator_info[i];
	251	if (ri->desc.id == id)
	252	return ri;
	253	}
	254	return NULL;
	255	}
	256
	257	static int __devinit max8925_regulator_probe(struct platform_device *pdev)
	258	{
	259	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
	260	struct max8925_platform_data *pdata = chip->dev->platform_data;
3fff6c04	261	struct max8925_regulator_info *ri;
08ff6f2a HZ	262	struct regulator_dev *rdev;
	263
	264	ri = find_regulator_info(pdev->id);
	265	if (ri == NULL) {
	266	dev_err(&pdev->dev, "invalid regulator ID specified\n");
	267	return -EINVAL;
	268	}
	269	ri->i2c = chip->i2c;
	270	ri->chip = chip;
	271
	272	rdev = regulator_register(&ri->desc, &pdev->dev,
2c043bcb	273	pdata->regulator[pdev->id], ri, NULL);
08ff6f2a HZ	274	if (IS_ERR(rdev)) {
	275	dev_err(&pdev->dev, "failed to register regulator %s\n",
	276	ri->desc.name);
	277	return PTR_ERR(rdev);
	278	}
	279
	280	platform_set_drvdata(pdev, rdev);
	281	return 0;
	282	}
	283
	284	static int __devexit max8925_regulator_remove(struct platform_device *pdev)
	285	{
	286	struct regulator_dev *rdev = platform_get_drvdata(pdev);
	287
3fff6c04	288	platform_set_drvdata(pdev, NULL);
08ff6f2a	289	regulator_unregister(rdev);
3fff6c04	290
08ff6f2a HZ	291	return 0;
	292	}
	293
	294	static struct platform_driver max8925_regulator_driver = {
	295	.driver = {
	296	.name = "max8925-regulator",
	297	.owner = THIS_MODULE,
	298	},
	299	.probe = max8925_regulator_probe,
	300	.remove = __devexit_p(max8925_regulator_remove),
	301	};
	302
	303	static int __init max8925_regulator_init(void)
	304	{
	305	return platform_driver_register(&max8925_regulator_driver);
	306	}
	307	subsys_initcall(max8925_regulator_init);
	308
	309	static void __exit max8925_regulator_exit(void)
	310	{
	311	platform_driver_unregister(&max8925_regulator_driver);
	312	}
	313	module_exit(max8925_regulator_exit);
	314
	315	MODULE_LICENSE("GPL");
	316	MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
	317	MODULE_DESCRIPTION("Regulator Driver for Maxim 8925 PMIC");
	318	MODULE_ALIAS("platform:max8925-regulator");
	319