[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / regulator / max8649.c

/*
 * Regulators driver for Maxim max8649
 *
 * Copyright (C) 2009-2010 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/err.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/slab.h>
#include <linux/regulator/max8649.h>
#include <linux/regmap.h>

#define MAX8649_DCDC_VMIN	750000		/* uV */
#define MAX8649_DCDC_VMAX	1380000		/* uV */
#define MAX8649_DCDC_STEP	10000		/* uV */
#define MAX8649_VOL_MASK	0x3f

/* Registers */
#define MAX8649_MODE0		0x00
#define MAX8649_MODE1		0x01
#define MAX8649_MODE2		0x02
#define MAX8649_MODE3		0x03
#define MAX8649_CONTROL		0x04
#define MAX8649_SYNC		0x05
#define MAX8649_RAMP		0x06
#define MAX8649_CHIP_ID1	0x08
#define MAX8649_CHIP_ID2	0x09

/* Bits */
#define MAX8649_EN_PD		(1 << 7)
#define MAX8649_VID0_PD		(1 << 6)
#define MAX8649_VID1_PD		(1 << 5)
#define MAX8649_VID_MASK	(3 << 5)

#define MAX8649_FORCE_PWM	(1 << 7)
#define MAX8649_SYNC_EXTCLK	(1 << 6)

#define MAX8649_EXT_MASK	(3 << 6)

#define MAX8649_RAMP_MASK	(7 << 5)
#define MAX8649_RAMP_DOWN	(1 << 1)

struct max8649_regulator_info {
	struct regulator_dev	*regulator;
	struct device		*dev;
	struct regmap		*regmap;

	unsigned	mode:2;	/* bit[1:0] = VID1, VID0 */
	unsigned	extclk_freq:2;
	unsigned	extclk:1;
	unsigned	ramp_timing:3;
	unsigned	ramp_down:1;
};

/* I2C operations */

static inline int check_range(int min_uV, int max_uV)
{
	if ((min_uV < MAX8649_DCDC_VMIN) || (max_uV > MAX8649_DCDC_VMAX)
		|| (min_uV > max_uV))
		return -EINVAL;
	return 0;
}

static int max8649_set_voltage(struct regulator_dev *rdev,
			       int min_uV, int max_uV, unsigned *selector)
{
	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
	unsigned char data, mask;

	if (check_range(min_uV, max_uV)) {
		dev_err(info->dev, "invalid voltage range (%d, %d) uV\n",
			min_uV, max_uV);
		return -EINVAL;
	}
	data = DIV_ROUND_UP(min_uV - MAX8649_DCDC_VMIN, MAX8649_DCDC_STEP);
	mask = MAX8649_VOL_MASK;
	*selector = data & mask;

	return regmap_update_bits(info->regmap, rdev->desc->vsel_reg, mask,
				  data);
}

/* EN_PD means pulldown on EN input */
static int max8649_enable(struct regulator_dev *rdev)
{
	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
	return regmap_update_bits(info->regmap, MAX8649_CONTROL, MAX8649_EN_PD, 0);
}

/*
 * Applied internal pulldown resistor on EN input pin.
 * If pulldown EN pin outside, it would be better.
 */
static int max8649_disable(struct regulator_dev *rdev)
{
	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
	return regmap_update_bits(info->regmap, MAX8649_CONTROL, MAX8649_EN_PD,
				MAX8649_EN_PD);
}

static int max8649_is_enabled(struct regulator_dev *rdev)
{
	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
	unsigned int val;
	int ret;

	ret = regmap_read(info->regmap, MAX8649_CONTROL, &val);
	if (ret != 0)
		return ret;
	return !((unsigned char)val & MAX8649_EN_PD);
}

static int max8649_enable_time(struct regulator_dev *rdev)
{
	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
	int voltage, rate, ret;
	unsigned int val;

	/* get voltage */
	ret = regmap_read(info->regmap, rdev->desc->vsel_reg, &val);
	if (ret != 0)
		return ret;
	val &= MAX8649_VOL_MASK;
	voltage = regulator_list_voltage_linear(rdev, (unsigned char)val);

	/* get rate */
	ret = regmap_read(info->regmap, MAX8649_RAMP, &val);
	if (ret != 0)
		return ret;
	ret = (val & MAX8649_RAMP_MASK) >> 5;
	rate = (32 * 1000) >> ret;	/* uV/uS */

	return DIV_ROUND_UP(voltage, rate);
}

static int max8649_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);

	switch (mode) {
	case REGULATOR_MODE_FAST:
		regmap_update_bits(info->regmap, rdev->desc->vsel_reg,
				   MAX8649_FORCE_PWM, MAX8649_FORCE_PWM);
		break;
	case REGULATOR_MODE_NORMAL:
		regmap_update_bits(info->regmap, rdev->desc->vsel_reg,
				   MAX8649_FORCE_PWM, 0);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static unsigned int max8649_get_mode(struct regulator_dev *rdev)
{
	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
	unsigned int val;
	int ret;

	ret = regmap_read(info->regmap, rdev->desc->vsel_reg, &val);
	if (ret != 0)
		return ret;
	if (val & MAX8649_FORCE_PWM)
		return REGULATOR_MODE_FAST;
	return REGULATOR_MODE_NORMAL;
}

static struct regulator_ops max8649_dcdc_ops = {
	.set_voltage	= max8649_set_voltage,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.list_voltage	= regulator_list_voltage_linear,
	.enable		= max8649_enable,
	.disable	= max8649_disable,
	.is_enabled	= max8649_is_enabled,
	.enable_time	= max8649_enable_time,
	.set_mode	= max8649_set_mode,
	.get_mode	= max8649_get_mode,

};

static struct regulator_desc dcdc_desc = {
	.name		= "max8649",
	.ops		= &max8649_dcdc_ops,
	.type		= REGULATOR_VOLTAGE,
	.n_voltages	= 1 << 6,
	.owner		= THIS_MODULE,
	.vsel_mask	= MAX8649_VOL_MASK,
	.min_uV		= MAX8649_DCDC_VMIN,
	.uV_step	= MAX8649_DCDC_STEP,
};

static struct regmap_config max8649_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
};

static int __devinit max8649_regulator_probe(struct i2c_client *client,
					     const struct i2c_device_id *id)
{
	struct max8649_platform_data *pdata = client->dev.platform_data;
	struct max8649_regulator_info *info = NULL;
	struct regulator_config config = { };
	unsigned int val;
	unsigned char data;
	int ret;

	info = devm_kzalloc(&client->dev, sizeof(struct max8649_regulator_info),
			    GFP_KERNEL);
	if (!info) {
		dev_err(&client->dev, "No enough memory\n");
		return -ENOMEM;
	}

	info->regmap = devm_regmap_init_i2c(client, &max8649_regmap_config);
	if (IS_ERR(info->regmap)) {
		ret = PTR_ERR(info->regmap);
		dev_err(&client->dev, "Failed to allocate register map: %d\n", ret);
		return ret;
	}

	info->dev = &client->dev;
	i2c_set_clientdata(client, info);

	info->mode = pdata->mode;
	switch (info->mode) {
	case 0:
		dcdc_desc.vsel_reg = MAX8649_MODE0;
		break;
	case 1:
		dcdc_desc.vsel_reg = MAX8649_MODE1;
		break;
	case 2:
		dcdc_desc.vsel_reg = MAX8649_MODE2;
		break;
	case 3:
		dcdc_desc.vsel_reg = MAX8649_MODE3;
		break;
	default:
		break;
	}

	ret = regmap_read(info->regmap, MAX8649_CHIP_ID1, &val);
	if (ret != 0) {
		dev_err(info->dev, "Failed to detect ID of MAX8649:%d\n",
			ret);
		return ret;
	}
	dev_info(info->dev, "Detected MAX8649 (ID:%x)\n", val);

	/* enable VID0 & VID1 */
	regmap_update_bits(info->regmap, MAX8649_CONTROL, MAX8649_VID_MASK, 0);

	/* enable/disable external clock synchronization */
	info->extclk = pdata->extclk;
	data = (info->extclk) ? MAX8649_SYNC_EXTCLK : 0;
	regmap_update_bits(info->regmap, dcdc_desc.vsel_reg,
			   MAX8649_SYNC_EXTCLK, data);
	if (info->extclk) {
		/* set external clock frequency */
		info->extclk_freq = pdata->extclk_freq;
		regmap_update_bits(info->regmap, MAX8649_SYNC, MAX8649_EXT_MASK,
				   info->extclk_freq << 6);
	}

	if (pdata->ramp_timing) {
		info->ramp_timing = pdata->ramp_timing;
		regmap_update_bits(info->regmap, MAX8649_RAMP, MAX8649_RAMP_MASK,
				   info->ramp_timing << 5);
	}

	info->ramp_down = pdata->ramp_down;
	if (info->ramp_down) {
		regmap_update_bits(info->regmap, MAX8649_RAMP, MAX8649_RAMP_DOWN,
				   MAX8649_RAMP_DOWN);
	}

	config.dev = &client->dev;
	config.init_data = pdata->regulator;
	config.driver_data = info;

	info->regulator = regulator_register(&dcdc_desc, &config);
	if (IS_ERR(info->regulator)) {
		dev_err(info->dev, "failed to register regulator %s\n",
			dcdc_desc.name);
		return PTR_ERR(info->regulator);
	}

	return 0;
}

static int __devexit max8649_regulator_remove(struct i2c_client *client)
{
	struct max8649_regulator_info *info = i2c_get_clientdata(client);

	if (info) {
		if (info->regulator)
			regulator_unregister(info->regulator);
	}

	return 0;
}

static const struct i2c_device_id max8649_id[] = {
	{ "max8649", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, max8649_id);

static struct i2c_driver max8649_driver = {
	.probe		= max8649_regulator_probe,
	.remove		= __devexit_p(max8649_regulator_remove),
	.driver		= {
		.name	= "max8649",
	},
	.id_table	= max8649_id,
};

static int __init max8649_init(void)
{
	return i2c_add_driver(&max8649_driver);
}
subsys_initcall(max8649_init);

static void __exit max8649_exit(void)
{
	i2c_del_driver(&max8649_driver);
}
module_exit(max8649_exit);

/* Module information */
MODULE_DESCRIPTION("MAXIM 8649 voltage regulator driver");
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
a71b797f HZ	1	/*
	2	* Regulators driver for Maxim max8649
	3	*
	4	* Copyright (C) 2009-2010 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>
	12	#include <linux/module.h>
	13	#include <linux/err.h>
	14	#include <linux/i2c.h>
	15	#include <linux/platform_device.h>
	16	#include <linux/regulator/driver.h>
5a0e3ad6	17	#include <linux/slab.h>
a71b797f	18	#include <linux/regulator/max8649.h>
c5b68d47	19	#include <linux/regmap.h>
a71b797f HZ	20
	21	#define MAX8649_DCDC_VMIN 750000 /* uV */
	22	#define MAX8649_DCDC_VMAX 1380000 /* uV */
	23	#define MAX8649_DCDC_STEP 10000 /* uV */
	24	#define MAX8649_VOL_MASK 0x3f
	25
	26	/* Registers */
	27	#define MAX8649_MODE0 0x00
	28	#define MAX8649_MODE1 0x01
	29	#define MAX8649_MODE2 0x02
	30	#define MAX8649_MODE3 0x03
	31	#define MAX8649_CONTROL 0x04
	32	#define MAX8649_SYNC 0x05
	33	#define MAX8649_RAMP 0x06
	34	#define MAX8649_CHIP_ID1 0x08
	35	#define MAX8649_CHIP_ID2 0x09
	36
	37	/* Bits */
	38	#define MAX8649_EN_PD (1 << 7)
	39	#define MAX8649_VID0_PD (1 << 6)
	40	#define MAX8649_VID1_PD (1 << 5)
	41	#define MAX8649_VID_MASK (3 << 5)
	42
	43	#define MAX8649_FORCE_PWM (1 << 7)
	44	#define MAX8649_SYNC_EXTCLK (1 << 6)
	45
	46	#define MAX8649_EXT_MASK (3 << 6)
	47
	48	#define MAX8649_RAMP_MASK (7 << 5)
	49	#define MAX8649_RAMP_DOWN (1 << 1)
	50
	51	struct max8649_regulator_info {
	52	struct regulator_dev *regulator;
a71b797f	53	struct device *dev;
c5b68d47	54	struct regmap *regmap;
a71b797f	55
a71b797f HZ	56	unsigned mode:2; /* bit[1:0] = VID1, VID0 */
	57	unsigned extclk_freq:2;
	58	unsigned extclk:1;
	59	unsigned ramp_timing:3;
	60	unsigned ramp_down:1;
	61	};
	62
	63	/* I2C operations */
	64
a71b797f HZ	65	static inline int check_range(int min_uV, int max_uV)
	66	{
	67	if ((min_uV < MAX8649_DCDC_VMIN) \|\| (max_uV > MAX8649_DCDC_VMAX)
	68	\|\| (min_uV > max_uV))
	69	return -EINVAL;
	70	return 0;
	71	}
	72
a71b797f	73	static int max8649_set_voltage(struct regulator_dev *rdev,
3a93f2a9	74	int min_uV, int max_uV, unsigned *selector)
a71b797f HZ	75	{
	76	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
	77	unsigned char data, mask;
	78
	79	if (check_range(min_uV, max_uV)) {
	80	dev_err(info->dev, "invalid voltage range (%d, %d) uV\n",
	81	min_uV, max_uV);
	82	return -EINVAL;
	83	}
21c9e5f1	84	data = DIV_ROUND_UP(min_uV - MAX8649_DCDC_VMIN, MAX8649_DCDC_STEP);
a71b797f	85	mask = MAX8649_VOL_MASK;
3a93f2a9	86	*selector = data & mask;
a71b797f	87
817d8c2d AL	88	return regmap_update_bits(info->regmap, rdev->desc->vsel_reg, mask,
817d8c2d AL	89	data);
a71b797f HZ	90	}
	91
	92	/* EN_PD means pulldown on EN input */
	93	static int max8649_enable(struct regulator_dev *rdev)
	94	{
	95	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
c5b68d47	96	return regmap_update_bits(info->regmap, MAX8649_CONTROL, MAX8649_EN_PD, 0);
a71b797f HZ	97	}
	98
	99	/*
	100	* Applied internal pulldown resistor on EN input pin.
	101	* If pulldown EN pin outside, it would be better.
	102	*/
	103	static int max8649_disable(struct regulator_dev *rdev)
	104	{
	105	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
c5b68d47	106	return regmap_update_bits(info->regmap, MAX8649_CONTROL, MAX8649_EN_PD,
a71b797f HZ	107	MAX8649_EN_PD);
	108	}
	109
	110	static int max8649_is_enabled(struct regulator_dev *rdev)
	111	{
	112	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
c5b68d47	113	unsigned int val;
a71b797f HZ	114	int ret;
a71b797f HZ	115
c5b68d47 JC	116	ret = regmap_read(info->regmap, MAX8649_CONTROL, &val);
c5b68d47 JC	117	if (ret != 0)
a71b797f	118	return ret;
c5b68d47	119	return !((unsigned char)val & MAX8649_EN_PD);
a71b797f HZ	120	}
	121
	122	static int max8649_enable_time(struct regulator_dev *rdev)
	123	{
	124	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
	125	int voltage, rate, ret;
c5b68d47	126	unsigned int val;
a71b797f HZ	127
a71b797f HZ	128	/* get voltage */
817d8c2d	129	ret = regmap_read(info->regmap, rdev->desc->vsel_reg, &val);
c5b68d47	130	if (ret != 0)
a71b797f	131	return ret;
c5b68d47	132	val &= MAX8649_VOL_MASK;
0fb737b5	133	voltage = regulator_list_voltage_linear(rdev, (unsigned char)val);
a71b797f HZ	134
a71b797f HZ	135	/* get rate */
c5b68d47 JC	136	ret = regmap_read(info->regmap, MAX8649_RAMP, &val);
c5b68d47 JC	137	if (ret != 0)
a71b797f	138	return ret;
c5b68d47	139	ret = (val & MAX8649_RAMP_MASK) >> 5;
a71b797f HZ	140	rate = (32 * 1000) >> ret; /* uV/uS */
a71b797f HZ	141
e69c4997	142	return DIV_ROUND_UP(voltage, rate);
a71b797f HZ	143	}
	144
	145	static int max8649_set_mode(struct regulator_dev *rdev, unsigned int mode)
	146	{
	147	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
	148
	149	switch (mode) {
	150	case REGULATOR_MODE_FAST:
817d8c2d AL	151	regmap_update_bits(info->regmap, rdev->desc->vsel_reg,
817d8c2d AL	152	MAX8649_FORCE_PWM, MAX8649_FORCE_PWM);
a71b797f HZ	153	break;
a71b797f HZ	154	case REGULATOR_MODE_NORMAL:
817d8c2d	155	regmap_update_bits(info->regmap, rdev->desc->vsel_reg,
c5b68d47	156	MAX8649_FORCE_PWM, 0);
a71b797f HZ	157	break;
	158	default:
	159	return -EINVAL;
	160	}
	161	return 0;
	162	}
	163
	164	static unsigned int max8649_get_mode(struct regulator_dev *rdev)
	165	{
	166	struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
c5b68d47	167	unsigned int val;
a71b797f HZ	168	int ret;
a71b797f HZ	169
817d8c2d	170	ret = regmap_read(info->regmap, rdev->desc->vsel_reg, &val);
c5b68d47 JC	171	if (ret != 0)
	172	return ret;
	173	if (val & MAX8649_FORCE_PWM)
a71b797f HZ	174	return REGULATOR_MODE_FAST;
	175	return REGULATOR_MODE_NORMAL;
	176	}
	177
	178	static struct regulator_ops max8649_dcdc_ops = {
	179	.set_voltage = max8649_set_voltage,
817d8c2d	180	.get_voltage_sel = regulator_get_voltage_sel_regmap,
0fb737b5	181	.list_voltage = regulator_list_voltage_linear,
a71b797f HZ	182	.enable = max8649_enable,
	183	.disable = max8649_disable,
	184	.is_enabled = max8649_is_enabled,
	185	.enable_time = max8649_enable_time,
	186	.set_mode = max8649_set_mode,
	187	.get_mode = max8649_get_mode,
	188
	189	};
	190
817d8c2d	191	static struct regulator_desc dcdc_desc = {
a71b797f HZ	192	.name = "max8649",
	193	.ops = &max8649_dcdc_ops,
	194	.type = REGULATOR_VOLTAGE,
	195	.n_voltages = 1 << 6,
	196	.owner = THIS_MODULE,
817d8c2d	197	.vsel_mask = MAX8649_VOL_MASK,
0fb737b5 AL	198	.min_uV = MAX8649_DCDC_VMIN,
0fb737b5 AL	199	.uV_step = MAX8649_DCDC_STEP,
a71b797f HZ	200	};
a71b797f HZ	201
c5b68d47 JC	202	static struct regmap_config max8649_regmap_config = {
	203	.reg_bits = 8,
	204	.val_bits = 8,
	205	};
	206
a71b797f HZ	207	static int __devinit max8649_regulator_probe(struct i2c_client *client,
	208	const struct i2c_device_id *id)
	209	{
	210	struct max8649_platform_data *pdata = client->dev.platform_data;
	211	struct max8649_regulator_info *info = NULL;
c172708d	212	struct regulator_config config = { };
c5b68d47	213	unsigned int val;
a71b797f HZ	214	unsigned char data;
	215	int ret;
	216
dc553a79 AL	217	info = devm_kzalloc(&client->dev, sizeof(struct max8649_regulator_info),
dc553a79 AL	218	GFP_KERNEL);
a71b797f HZ	219	if (!info) {
	220	dev_err(&client->dev, "No enough memory\n");
	221	return -ENOMEM;
	222	}
	223
dc553a79	224	info->regmap = devm_regmap_init_i2c(client, &max8649_regmap_config);
c5b68d47 JC	225	if (IS_ERR(info->regmap)) {
	226	ret = PTR_ERR(info->regmap);
	227	dev_err(&client->dev, "Failed to allocate register map: %d\n", ret);
dc553a79	228	return ret;
c5b68d47 JC	229	}
c5b68d47 JC	230
a71b797f	231	info->dev = &client->dev;
a71b797f HZ	232	i2c_set_clientdata(client, info);
	233
	234	info->mode = pdata->mode;
	235	switch (info->mode) {
	236	case 0:
817d8c2d	237	dcdc_desc.vsel_reg = MAX8649_MODE0;
a71b797f HZ	238	break;
a71b797f HZ	239	case 1:
817d8c2d	240	dcdc_desc.vsel_reg = MAX8649_MODE1;
a71b797f HZ	241	break;
a71b797f HZ	242	case 2:
817d8c2d	243	dcdc_desc.vsel_reg = MAX8649_MODE2;
a71b797f HZ	244	break;
a71b797f HZ	245	case 3:
817d8c2d	246	dcdc_desc.vsel_reg = MAX8649_MODE3;
a71b797f HZ	247	break;
	248	default:
	249	break;
	250	}
	251
c5b68d47 JC	252	ret = regmap_read(info->regmap, MAX8649_CHIP_ID1, &val);
c5b68d47 JC	253	if (ret != 0) {
a71b797f HZ	254	dev_err(info->dev, "Failed to detect ID of MAX8649:%d\n",
a71b797f HZ	255	ret);
dc553a79	256	return ret;
a71b797f	257	}
da7de6a1	258	dev_info(info->dev, "Detected MAX8649 (ID:%x)\n", val);
a71b797f HZ	259
a71b797f HZ	260	/* enable VID0 & VID1 */
c5b68d47	261	regmap_update_bits(info->regmap, MAX8649_CONTROL, MAX8649_VID_MASK, 0);
a71b797f HZ	262
	263	/* enable/disable external clock synchronization */
	264	info->extclk = pdata->extclk;
	265	data = (info->extclk) ? MAX8649_SYNC_EXTCLK : 0;
817d8c2d AL	266	regmap_update_bits(info->regmap, dcdc_desc.vsel_reg,
817d8c2d AL	267	MAX8649_SYNC_EXTCLK, data);
a71b797f HZ	268	if (info->extclk) {
	269	/* set external clock frequency */
	270	info->extclk_freq = pdata->extclk_freq;
c5b68d47 JC	271	regmap_update_bits(info->regmap, MAX8649_SYNC, MAX8649_EXT_MASK,
c5b68d47 JC	272	info->extclk_freq << 6);
a71b797f HZ	273	}
	274
	275	if (pdata->ramp_timing) {
	276	info->ramp_timing = pdata->ramp_timing;
c5b68d47 JC	277	regmap_update_bits(info->regmap, MAX8649_RAMP, MAX8649_RAMP_MASK,
c5b68d47 JC	278	info->ramp_timing << 5);
a71b797f HZ	279	}
	280
	281	info->ramp_down = pdata->ramp_down;
	282	if (info->ramp_down) {
c5b68d47 JC	283	regmap_update_bits(info->regmap, MAX8649_RAMP, MAX8649_RAMP_DOWN,
c5b68d47 JC	284	MAX8649_RAMP_DOWN);
a71b797f HZ	285	}
a71b797f HZ	286
c172708d MB	287	config.dev = &client->dev;
	288	config.init_data = pdata->regulator;
	289	config.driver_data = info;
	290
	291	info->regulator = regulator_register(&dcdc_desc, &config);
a71b797f HZ	292	if (IS_ERR(info->regulator)) {
	293	dev_err(info->dev, "failed to register regulator %s\n",
	294	dcdc_desc.name);
dc553a79	295	return PTR_ERR(info->regulator);
a71b797f HZ	296	}
a71b797f HZ	297
a71b797f	298	return 0;
a71b797f HZ	299	}
	300
	301	static int __devexit max8649_regulator_remove(struct i2c_client *client)
	302	{
	303	struct max8649_regulator_info *info = i2c_get_clientdata(client);
	304
	305	if (info) {
	306	if (info->regulator)
	307	regulator_unregister(info->regulator);
a71b797f	308	}
a71b797f HZ	309
	310	return 0;
	311	}
	312
	313	static const struct i2c_device_id max8649_id[] = {
	314	{ "max8649", 0 },
	315	{ }
	316	};
	317	MODULE_DEVICE_TABLE(i2c, max8649_id);
	318
	319	static struct i2c_driver max8649_driver = {
	320	.probe = max8649_regulator_probe,
	321	.remove = __devexit_p(max8649_regulator_remove),
	322	.driver = {
	323	.name = "max8649",
	324	},
	325	.id_table = max8649_id,
	326	};
	327
	328	static int __init max8649_init(void)
	329	{
	330	return i2c_add_driver(&max8649_driver);
	331	}
	332	subsys_initcall(max8649_init);
	333
	334	static void __exit max8649_exit(void)
	335	{
	336	i2c_del_driver(&max8649_driver);
	337	}
	338	module_exit(max8649_exit);
	339
	340	/* Module information */
	341	MODULE_DESCRIPTION("MAXIM 8649 voltage regulator driver");
	342	MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
	343	MODULE_LICENSE("GPL");