[mirror_ubuntu-zesty-kernel.git] / drivers / regulator / rc5t583-regulator.c

/*
 * Regulator driver for RICOH RC5T583 power management chip.
 *
 * Copyright (c) 2011-2012, NVIDIA CORPORATION.  All rights reserved.
 * Author: Laxman dewangan <ldewangan@nvidia.com>
 *
 * based on code
 *      Copyright (C) 2011 RICOH COMPANY,LTD
 *
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/gpio.h>
#include <linux/mfd/rc5t583.h>

struct rc5t583_regulator_info {
	int			deepsleep_id;

	/* Regulator register address.*/
	uint8_t			reg_disc_reg;
	uint8_t			disc_bit;
	uint8_t			deepsleep_reg;

	/* Chip constraints on regulator behavior */
	int			min_uV;
	int			max_uV;
	int			step_uV;

	/* Regulator specific turn-on delay  and voltage settling time*/
	int			enable_uv_per_us;
	int			change_uv_per_us;

	/* Used by regulator core */
	struct regulator_desc	desc;
};

struct rc5t583_regulator {
	struct rc5t583_regulator_info *reg_info;

	/* Devices */
	struct device		*dev;
	struct rc5t583		*mfd;
	struct regulator_dev	*rdev;
};

static int rc5t583_list_voltage(struct regulator_dev *rdev, unsigned selector)
{
	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	struct rc5t583_regulator_info *ri = reg->reg_info;
	return ri->min_uV + (ri->step_uV * selector);
}

static int rc5t583_set_voltage(struct regulator_dev *rdev,
			       int min_uV, int max_uV, unsigned *selector)
{
	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	struct rc5t583_regulator_info *ri = reg->reg_info;
	int sel, ret;

	if (min_uV < ri->min_uV)
		min_uV = ri->min_uV;

	sel = DIV_ROUND_UP(min_uV - ri->min_uV, ri->step_uV);

	if (sel >= rdev->desc->n_voltages) {
		dev_err(&rdev->dev, "Invalid selector 0x%02x\n", sel);
		return -EINVAL;
	}

	*selector = sel;

	ret = rc5t583_update(reg->mfd->dev, rdev->desc->vsel_reg, sel,
			     rdev->desc->vsel_mask);
	if (ret < 0)
		dev_err(&rdev->dev, "Error in update voltage register 0x%02x\n",
			rdev->desc->vsel_reg);
	return ret;
}

static int rc5t583_regulator_enable_time(struct regulator_dev *rdev)
{
	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	int vsel = regulator_get_voltage_sel_regmap(rdev);
	int curr_uV = rc5t583_list_voltage(rdev, vsel);

	return DIV_ROUND_UP(curr_uV, reg->reg_info->enable_uv_per_us);
}

static int rc5t583_set_voltage_time_sel(struct regulator_dev *rdev,
		unsigned int old_selector, unsigned int new_selector)
{
	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	int old_uV, new_uV;
	old_uV = rc5t583_list_voltage(rdev, old_selector);

	if (old_uV < 0)
		return old_uV;

	new_uV = rc5t583_list_voltage(rdev, new_selector);
	if (new_uV < 0)
		return new_uV;

	return DIV_ROUND_UP(abs(old_uV - new_uV),
				reg->reg_info->change_uv_per_us);
}


static struct regulator_ops rc5t583_ops = {
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.enable_time		= rc5t583_regulator_enable_time,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage		= rc5t583_set_voltage,
	.list_voltage		= rc5t583_list_voltage,
	.set_voltage_time_sel	= rc5t583_set_voltage_time_sel,
};

#define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \
		_vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \
{								\
	.reg_disc_reg	= RC5T583_REG_##_disc_reg,		\
	.disc_bit	= _disc_bit,				\
	.deepsleep_reg	= RC5T583_REG_##_id##DAC_DS,		\
	.min_uV		= _min_mv * 1000,			\
	.max_uV		= _max_mv * 1000,			\
	.step_uV	= _step_uV,				\
	.enable_uv_per_us = _enable_mv * 1000,			\
	.change_uv_per_us = 40 * 1000,				\
	.deepsleep_id	= RC5T583_DS_##_id,			\
	.desc = {						\
		.name = "rc5t583-regulator-"#_id,		\
		.id = RC5T583_REGULATOR_##_id,			\
		.n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \
		.ops = &rc5t583_ops,				\
		.type = REGULATOR_VOLTAGE,			\
		.owner = THIS_MODULE,				\
		.vsel_reg = RC5T583_REG_##_id##DAC,		\
		.vsel_mask = _vout_mask,			\
		.enable_reg = RC5T583_REG_##_en_reg,		\
		.enable_mask = BIT(_en_bit),			\
	},							\
}

static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = {
	RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4),
	RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14),
	RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14),
	RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14),
	RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160),
	RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160),
	RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160),
	RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160),
	RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133),
	RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267),
	RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133),
	RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233),
	RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233),
	RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133),
};

static int __devinit rc5t583_regulator_probe(struct platform_device *pdev)
{
	struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
	struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
	struct regulator_init_data *reg_data;
	struct regulator_config config = { };
	struct rc5t583_regulator *reg = NULL;
	struct rc5t583_regulator *regs;
	struct regulator_dev *rdev;
	struct rc5t583_regulator_info *ri;
	int ret;
	int id;

	if (!pdata) {
		dev_err(&pdev->dev, "No platform data, exiting...\n");
		return -ENODEV;
	}

	regs = devm_kzalloc(&pdev->dev, RC5T583_REGULATOR_MAX *
			sizeof(struct rc5t583_regulator), GFP_KERNEL);
	if (!regs) {
		dev_err(&pdev->dev, "Memory allocation failed exiting..\n");
		return -ENOMEM;
	}


	for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) {
		reg_data = pdata->reg_init_data[id];

		/* No need to register if there is no regulator data */
		if (!reg_data)
			continue;

		reg = &regs[id];
		ri = &rc5t583_reg_info[id];
		reg->reg_info = ri;
		reg->mfd = rc5t583;
		reg->dev = &pdev->dev;

		if (ri->deepsleep_id == RC5T583_DS_NONE)
			goto skip_ext_pwr_config;

		ret = rc5t583_ext_power_req_config(rc5t583->dev,
				ri->deepsleep_id,
				pdata->regulator_ext_pwr_control[id],
				pdata->regulator_deepsleep_slot[id]);
		/*
		 * Configuring external control is not a major issue,
		 * just give warning.
		 */
		if (ret < 0)
			dev_warn(&pdev->dev,
				"Failed to configure ext control %d\n", id);

skip_ext_pwr_config:
		config.dev = &pdev->dev;
		config.init_data = reg_data;
		config.driver_data = reg;
		config.regmap = rc5t583->regmap;

		rdev = regulator_register(&ri->desc, &config);
		if (IS_ERR(rdev)) {
			dev_err(&pdev->dev, "Failed to register regulator %s\n",
						ri->desc.name);
			ret = PTR_ERR(rdev);
			goto clean_exit;
		}
		reg->rdev = rdev;
	}
	platform_set_drvdata(pdev, regs);
	return 0;

clean_exit:
	while (--id >= 0)
		regulator_unregister(regs[id].rdev);

	return ret;
}

static int __devexit rc5t583_regulator_remove(struct platform_device *pdev)
{
	struct rc5t583_regulator *regs = platform_get_drvdata(pdev);
	int id;

	for (id = 0; id < RC5T583_REGULATOR_MAX; ++id)
		regulator_unregister(regs[id].rdev);
	return 0;
}

static struct platform_driver rc5t583_regulator_driver = {
	.driver	= {
		.name	= "rc5t583-regulator",
		.owner	= THIS_MODULE,
	},
	.probe		= rc5t583_regulator_probe,
	.remove		= __devexit_p(rc5t583_regulator_remove),
};

static int __init rc5t583_regulator_init(void)
{
	return platform_driver_register(&rc5t583_regulator_driver);
}
subsys_initcall(rc5t583_regulator_init);

static void __exit rc5t583_regulator_exit(void)
{
	platform_driver_unregister(&rc5t583_regulator_driver);
}
module_exit(rc5t583_regulator_exit);

MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
MODULE_DESCRIPTION("RC5T583 regulator driver");
MODULE_ALIAS("platform:rc5t583-regulator");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
6ffc3270 LD	1	/*
	2	* Regulator driver for RICOH RC5T583 power management chip.
	3	*
	4	* Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
	5	* Author: Laxman dewangan <ldewangan@nvidia.com>
	6	*
	7	* based on code
	8	* Copyright (C) 2011 RICOH COMPANY,LTD
	9	*
	10	*
	11	* This program is free software; you can redistribute it and/or modify it
	12	* under the terms and conditions of the GNU General Public License,
	13	* version 2, as published by the Free Software Foundation.
	14	*
	15	* This program is distributed in the hope it will be useful, but WITHOUT
	16	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	17	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	18	* more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	22	*
	23	*/
	24
	25	#include <linux/module.h>
6ffc3270 LD	26	#include <linux/init.h>
	27	#include <linux/slab.h>
	28	#include <linux/err.h>
	29	#include <linux/platform_device.h>
	30	#include <linux/regulator/driver.h>
	31	#include <linux/regulator/machine.h>
	32	#include <linux/gpio.h>
	33	#include <linux/mfd/rc5t583.h>
	34
	35	struct rc5t583_regulator_info {
	36	int deepsleep_id;
	37
	38	/* Regulator register address.*/
6ffc3270 LD	39	uint8_t reg_disc_reg;
6ffc3270 LD	40	uint8_t disc_bit;
6ffc3270 LD	41	uint8_t deepsleep_reg;
	42
	43	/* Chip constraints on regulator behavior */
	44	int min_uV;
	45	int max_uV;
	46	int step_uV;
6ffc3270 LD	47
	48	/* Regulator specific turn-on delay and voltage settling time*/
	49	int enable_uv_per_us;
	50	int change_uv_per_us;
	51
	52	/* Used by regulator core */
	53	struct regulator_desc desc;
	54	};
	55
	56	struct rc5t583_regulator {
	57	struct rc5t583_regulator_info *reg_info;
	58
	59	/* Devices */
	60	struct device *dev;
	61	struct rc5t583 *mfd;
	62	struct regulator_dev *rdev;
	63	};
	64
6ffc3270 LD	65	static int rc5t583_list_voltage(struct regulator_dev *rdev, unsigned selector)
	66	{
	67	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	68	struct rc5t583_regulator_info *ri = reg->reg_info;
	69	return ri->min_uV + (ri->step_uV * selector);
	70	}
	71
f604c10c AL	72	static int rc5t583_set_voltage(struct regulator_dev *rdev,
f604c10c AL	73	int min_uV, int max_uV, unsigned *selector)
6ffc3270 LD	74	{
	75	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	76	struct rc5t583_regulator_info *ri = reg->reg_info;
f604c10c AL	77	int sel, ret;
	78
	79	if (min_uV < ri->min_uV)
	80	min_uV = ri->min_uV;
	81
	82	sel = DIV_ROUND_UP(min_uV - ri->min_uV, ri->step_uV);
	83
	84	if (sel >= rdev->desc->n_voltages) {
	85	dev_err(&rdev->dev, "Invalid selector 0x%02x\n", sel);
6ffc3270 LD	86	return -EINVAL;
	87	}
	88
f604c10c AL	89	*selector = sel;
f604c10c AL	90
15b397d7 AL	91	ret = rc5t583_update(reg->mfd->dev, rdev->desc->vsel_reg, sel,
15b397d7 AL	92	rdev->desc->vsel_mask);
6ffc3270	93	if (ret < 0)
15b397d7 AL	94	dev_err(&rdev->dev, "Error in update voltage register 0x%02x\n",
15b397d7 AL	95	rdev->desc->vsel_reg);
6ffc3270 LD	96	return ret;
	97	}
	98
6ffc3270 LD	99	static int rc5t583_regulator_enable_time(struct regulator_dev *rdev)
	100	{
	101	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
15b397d7	102	int vsel = regulator_get_voltage_sel_regmap(rdev);
6ffc3270	103	int curr_uV = rc5t583_list_voltage(rdev, vsel);
15b397d7	104
6ffc3270 LD	105	return DIV_ROUND_UP(curr_uV, reg->reg_info->enable_uv_per_us);
	106	}
	107
	108	static int rc5t583_set_voltage_time_sel(struct regulator_dev *rdev,
	109	unsigned int old_selector, unsigned int new_selector)
	110	{
	111	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	112	int old_uV, new_uV;
	113	old_uV = rc5t583_list_voltage(rdev, old_selector);
	114
	115	if (old_uV < 0)
	116	return old_uV;
	117
	118	new_uV = rc5t583_list_voltage(rdev, new_selector);
	119	if (new_uV < 0)
	120	return new_uV;
	121
	122	return DIV_ROUND_UP(abs(old_uV - new_uV),
	123	reg->reg_info->change_uv_per_us);
	124	}
	125
	126
	127	static struct regulator_ops rc5t583_ops = {
5bb6936c AL	128	.is_enabled = regulator_is_enabled_regmap,
	129	.enable = regulator_enable_regmap,
	130	.disable = regulator_disable_regmap,
6ffc3270	131	.enable_time = rc5t583_regulator_enable_time,
15b397d7	132	.get_voltage_sel = regulator_get_voltage_sel_regmap,
f604c10c	133	.set_voltage = rc5t583_set_voltage,
6ffc3270 LD	134	.list_voltage = rc5t583_list_voltage,
	135	.set_voltage_time_sel = rc5t583_set_voltage_time_sel,
	136	};
	137
95e301ba AL	138	#define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \
95e301ba AL	139	_vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \
6ffc3270	140	{ \
6ffc3270 LD	141	.reg_disc_reg = RC5T583_REG_##_disc_reg, \
6ffc3270 LD	142	.disc_bit = _disc_bit, \
95e301ba	143	.deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \
6ffc3270 LD	144	.min_uV = _min_mv * 1000, \
	145	.max_uV = _max_mv * 1000, \
	146	.step_uV = _step_uV, \
6ffc3270 LD	147	.enable_uv_per_us = _enable_mv * 1000, \
	148	.change_uv_per_us = 40 * 1000, \
	149	.deepsleep_id = RC5T583_DS_##_id, \
	150	.desc = { \
	151	.name = "rc5t583-regulator-"#_id, \
	152	.id = RC5T583_REGULATOR_##_id, \
e3a7384c	153	.n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \
6ffc3270 LD	154	.ops = &rc5t583_ops, \
	155	.type = REGULATOR_VOLTAGE, \
	156	.owner = THIS_MODULE, \
15b397d7 AL	157	.vsel_reg = RC5T583_REG_##_id##DAC, \
15b397d7 AL	158	.vsel_mask = _vout_mask, \
5bb6936c AL	159	.enable_reg = RC5T583_REG_##_en_reg, \
5bb6936c AL	160	.enable_mask = BIT(_en_bit), \
6ffc3270 LD	161	}, \
	162	}
	163
	164	static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = {
95e301ba AL	165	RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4),
	166	RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14),
	167	RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14),
	168	RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14),
	169	RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160),
	170	RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160),
	171	RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160),
	172	RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160),
	173	RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133),
	174	RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267),
	175	RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133),
	176	RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233),
	177	RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233),
	178	RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133),
6ffc3270 LD	179	};
	180
	181	static int __devinit rc5t583_regulator_probe(struct platform_device *pdev)
	182	{
	183	struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
	184	struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
	185	struct regulator_init_data *reg_data;
c172708d	186	struct regulator_config config = { };
6ffc3270 LD	187	struct rc5t583_regulator *reg = NULL;
	188	struct rc5t583_regulator *regs;
	189	struct regulator_dev *rdev;
	190	struct rc5t583_regulator_info *ri;
	191	int ret;
	192	int id;
	193
	194	if (!pdata) {
	195	dev_err(&pdev->dev, "No platform data, exiting...\n");
	196	return -ENODEV;
	197	}
	198
	199	regs = devm_kzalloc(&pdev->dev, RC5T583_REGULATOR_MAX *
	200	sizeof(struct rc5t583_regulator), GFP_KERNEL);
	201	if (!regs) {
	202	dev_err(&pdev->dev, "Memory allocation failed exiting..\n");
	203	return -ENOMEM;
	204	}
	205
	206
	207	for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) {
	208	reg_data = pdata->reg_init_data[id];
	209
	210	/* No need to register if there is no regulator data */
	211	if (!reg_data)
	212	continue;
	213
	214	reg = &regs[id];
	215	ri = &rc5t583_reg_info[id];
	216	reg->reg_info = ri;
	217	reg->mfd = rc5t583;
	218	reg->dev = &pdev->dev;
	219
	220	if (ri->deepsleep_id == RC5T583_DS_NONE)
	221	goto skip_ext_pwr_config;
	222
	223	ret = rc5t583_ext_power_req_config(rc5t583->dev,
	224	ri->deepsleep_id,
	225	pdata->regulator_ext_pwr_control[id],
	226	pdata->regulator_deepsleep_slot[id]);
	227	/*
	228	* Configuring external control is not a major issue,
	229	* just give warning.
	230	*/
	231	if (ret < 0)
	232	dev_warn(&pdev->dev,
	233	"Failed to configure ext control %d\n", id);
	234
	235	skip_ext_pwr_config:
c172708d MB	236	config.dev = &pdev->dev;
	237	config.init_data = reg_data;
	238	config.driver_data = reg;
5bb6936c	239	config.regmap = rc5t583->regmap;
c172708d MB	240
c172708d MB	241	rdev = regulator_register(&ri->desc, &config);
a69df8a1	242	if (IS_ERR(rdev)) {
6ffc3270 LD	243	dev_err(&pdev->dev, "Failed to register regulator %s\n",
	244	ri->desc.name);
	245	ret = PTR_ERR(rdev);
	246	goto clean_exit;
	247	}
	248	reg->rdev = rdev;
	249	}
	250	platform_set_drvdata(pdev, regs);
	251	return 0;
	252
	253	clean_exit:
a69df8a1	254	while (--id >= 0)
6ffc3270 LD	255	regulator_unregister(regs[id].rdev);
	256
	257	return ret;
	258	}
	259
	260	static int __devexit rc5t583_regulator_remove(struct platform_device *pdev)
	261	{
	262	struct rc5t583_regulator *regs = platform_get_drvdata(pdev);
	263	int id;
	264
	265	for (id = 0; id < RC5T583_REGULATOR_MAX; ++id)
	266	regulator_unregister(regs[id].rdev);
	267	return 0;
	268	}
	269
	270	static struct platform_driver rc5t583_regulator_driver = {
	271	.driver = {
	272	.name = "rc5t583-regulator",
	273	.owner = THIS_MODULE,
	274	},
	275	.probe = rc5t583_regulator_probe,
	276	.remove = __devexit_p(rc5t583_regulator_remove),
	277	};
	278
	279	static int __init rc5t583_regulator_init(void)
	280	{
	281	return platform_driver_register(&rc5t583_regulator_driver);
	282	}
	283	subsys_initcall(rc5t583_regulator_init);
	284
	285	static void __exit rc5t583_regulator_exit(void)
	286	{
	287	platform_driver_unregister(&rc5t583_regulator_driver);
	288	}
	289	module_exit(rc5t583_regulator_exit);
	290
	291	MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
	292	MODULE_DESCRIPTION("RC5T583 regulator driver");
	293	MODULE_ALIAS("platform:rc5t583-regulator");
4eb06453	294	MODULE_LICENSE("GPL v2");