[deliverable/linux.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/delay.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_en_reg;
	uint8_t			en_bit;
	uint8_t			reg_disc_reg;
	uint8_t			disc_bit;
	uint8_t			vout_reg;
	uint8_t			vout_mask;
	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_reg_is_enabled(struct regulator_dev *rdev)
{
	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	struct rc5t583_regulator_info *ri = reg->reg_info;
	uint8_t control;
	int ret;

	ret = rc5t583_read(reg->mfd->dev, ri->reg_en_reg, &control);
	if (ret < 0) {
		dev_err(&rdev->dev,
			"Error in reading the control register 0x%02x\n",
			ri->reg_en_reg);
		return ret;
	}
	return !!(control & BIT(ri->en_bit));
}

static int rc5t583_reg_enable(struct regulator_dev *rdev)
{
	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	struct rc5t583_regulator_info *ri = reg->reg_info;
	int ret;

	ret = rc5t583_set_bits(reg->mfd->dev, ri->reg_en_reg,
				(1 << ri->en_bit));
	if (ret < 0) {
		dev_err(&rdev->dev,
			"Error in setting bit of STATE register 0x%02x\n",
			ri->reg_en_reg);
		return ret;
	}
	return ret;
}

static int rc5t583_reg_disable(struct regulator_dev *rdev)
{
	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	struct rc5t583_regulator_info *ri = reg->reg_info;
	int ret;

	ret = rc5t583_clear_bits(reg->mfd->dev, ri->reg_en_reg,
				(1 << ri->en_bit));
	if (ret < 0)
		dev_err(&rdev->dev,
			"Error in clearing bit of STATE register 0x%02x\n",
			ri->reg_en_reg);

	return ret;
}

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, ri->vout_reg, sel, ri->vout_mask);
	if (ret < 0)
		dev_err(&rdev->dev,
		    "Error in update voltage register 0x%02x\n", ri->vout_reg);
	return ret;
}

static int rc5t583_get_voltage_sel(struct regulator_dev *rdev)
{
	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	struct rc5t583_regulator_info *ri = reg->reg_info;
	uint8_t vsel;
	int ret;
	ret = rc5t583_read(reg->mfd->dev, ri->vout_reg, &vsel);
	if (ret < 0) {
		dev_err(&rdev->dev,
		    "Error in reading voltage register 0x%02x\n", ri->vout_reg);
		return ret;
	}
	return vsel & ri->vout_mask;
}

static int rc5t583_regulator_enable_time(struct regulator_dev *rdev)
{
	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	int vsel = rc5t583_get_voltage_sel(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		= rc5t583_reg_is_enabled,
	.enable			= rc5t583_reg_enable,
	.disable		= rc5t583_reg_disable,
	.enable_time		= rc5t583_regulator_enable_time,
	.get_voltage_sel	= rc5t583_get_voltage_sel,
	.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_en_reg	= RC5T583_REG_##_en_reg,		\
	.en_bit		= _en_bit,				\
	.reg_disc_reg	= RC5T583_REG_##_disc_reg,		\
	.disc_bit	= _disc_bit,				\
	.vout_reg	= RC5T583_REG_##_id##DAC,		\
	.vout_mask	= _vout_mask,				\
	.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,				\
	},							\
}

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 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:
		rdev = regulator_register(&ri->desc, &pdev->dev,
					reg_data, reg, NULL);
		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>
	26	#include <linux/delay.h>
	27	#include <linux/init.h>
	28	#include <linux/slab.h>
	29	#include <linux/err.h>
	30	#include <linux/platform_device.h>
	31	#include <linux/regulator/driver.h>
	32	#include <linux/regulator/machine.h>
	33	#include <linux/gpio.h>
	34	#include <linux/mfd/rc5t583.h>
	35
	36	struct rc5t583_regulator_info {
	37	int deepsleep_id;
	38
	39	/* Regulator register address.*/
	40	uint8_t reg_en_reg;
	41	uint8_t en_bit;
	42	uint8_t reg_disc_reg;
	43	uint8_t disc_bit;
	44	uint8_t vout_reg;
	45	uint8_t vout_mask;
	46	uint8_t deepsleep_reg;
	47
	48	/* Chip constraints on regulator behavior */
	49	int min_uV;
	50	int max_uV;
	51	int step_uV;
6ffc3270 LD	52
	53	/* Regulator specific turn-on delay and voltage settling time*/
	54	int enable_uv_per_us;
	55	int change_uv_per_us;
	56
	57	/* Used by regulator core */
	58	struct regulator_desc desc;
	59	};
	60
	61	struct rc5t583_regulator {
	62	struct rc5t583_regulator_info *reg_info;
	63
	64	/* Devices */
	65	struct device *dev;
	66	struct rc5t583 *mfd;
	67	struct regulator_dev *rdev;
	68	};
	69
	70	static int rc5t583_reg_is_enabled(struct regulator_dev *rdev)
	71	{
	72	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	73	struct rc5t583_regulator_info *ri = reg->reg_info;
	74	uint8_t control;
	75	int ret;
	76
	77	ret = rc5t583_read(reg->mfd->dev, ri->reg_en_reg, &control);
	78	if (ret < 0) {
	79	dev_err(&rdev->dev,
	80	"Error in reading the control register 0x%02x\n",
	81	ri->reg_en_reg);
	82	return ret;
	83	}
	84	return !!(control & BIT(ri->en_bit));
	85	}
	86
	87	static int rc5t583_reg_enable(struct regulator_dev *rdev)
	88	{
	89	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	90	struct rc5t583_regulator_info *ri = reg->reg_info;
	91	int ret;
	92
	93	ret = rc5t583_set_bits(reg->mfd->dev, ri->reg_en_reg,
	94	(1 << ri->en_bit));
	95	if (ret < 0) {
	96	dev_err(&rdev->dev,
	97	"Error in setting bit of STATE register 0x%02x\n",
	98	ri->reg_en_reg);
	99	return ret;
	100	}
	101	return ret;
	102	}
	103
	104	static int rc5t583_reg_disable(struct regulator_dev *rdev)
	105	{
	106	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	107	struct rc5t583_regulator_info *ri = reg->reg_info;
	108	int ret;
	109
	110	ret = rc5t583_clear_bits(reg->mfd->dev, ri->reg_en_reg,
	111	(1 << ri->en_bit));
	112	if (ret < 0)
	113	dev_err(&rdev->dev,
	114	"Error in clearing bit of STATE register 0x%02x\n",
	115	ri->reg_en_reg);
116
117	return ret;
118	}
119
120	static int rc5t583_list_voltage(struct regulator_dev *rdev, unsigned selector)
121	{
122	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
123	struct rc5t583_regulator_info *ri = reg->reg_info;
124	return ri->min_uV + (ri->step_uV * selector);
125	}
126
f604c10c AL	127	static int rc5t583_set_voltage(struct regulator_dev *rdev,
f604c10c AL	128	int min_uV, int max_uV, unsigned *selector)
6ffc3270 LD	129	{
	130	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	131	struct rc5t583_regulator_info *ri = reg->reg_info;
f604c10c AL	132	int sel, ret;
	133
	134	if (min_uV < ri->min_uV)
	135	min_uV = ri->min_uV;
	136
	137	sel = DIV_ROUND_UP(min_uV - ri->min_uV, ri->step_uV);
	138
	139	if (sel >= rdev->desc->n_voltages) {
	140	dev_err(&rdev->dev, "Invalid selector 0x%02x\n", sel);
6ffc3270 LD	141	return -EINVAL;
	142	}
	143
f604c10c AL	144	*selector = sel;
	145
	146	ret = rc5t583_update(reg->mfd->dev, ri->vout_reg, sel, ri->vout_mask);
6ffc3270 LD	147	if (ret < 0)
	148	dev_err(&rdev->dev,
	149	"Error in update voltage register 0x%02x\n", ri->vout_reg);
	150	return ret;
	151	}
	152
	153	static int rc5t583_get_voltage_sel(struct regulator_dev *rdev)
	154	{
	155	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	156	struct rc5t583_regulator_info *ri = reg->reg_info;
	157	uint8_t vsel;
	158	int ret;
	159	ret = rc5t583_read(reg->mfd->dev, ri->vout_reg, &vsel);
	160	if (ret < 0) {
	161	dev_err(&rdev->dev,
	162	"Error in reading voltage register 0x%02x\n", ri->vout_reg);
	163	return ret;
	164	}
	165	return vsel & ri->vout_mask;
	166	}
	167
	168	static int rc5t583_regulator_enable_time(struct regulator_dev *rdev)
	169	{
	170	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	171	int vsel = rc5t583_get_voltage_sel(rdev);
	172	int curr_uV = rc5t583_list_voltage(rdev, vsel);
	173	return DIV_ROUND_UP(curr_uV, reg->reg_info->enable_uv_per_us);
	174	}
	175
	176	static int rc5t583_set_voltage_time_sel(struct regulator_dev *rdev,
	177	unsigned int old_selector, unsigned int new_selector)
	178	{
	179	struct rc5t583_regulator *reg = rdev_get_drvdata(rdev);
	180	int old_uV, new_uV;
	181	old_uV = rc5t583_list_voltage(rdev, old_selector);
	182
	183	if (old_uV < 0)
	184	return old_uV;
	185
	186	new_uV = rc5t583_list_voltage(rdev, new_selector);
	187	if (new_uV < 0)
	188	return new_uV;
	189
	190	return DIV_ROUND_UP(abs(old_uV - new_uV),
	191	reg->reg_info->change_uv_per_us);
	192	}
	193
	194
	195	static struct regulator_ops rc5t583_ops = {
	196	.is_enabled = rc5t583_reg_is_enabled,
	197	.enable = rc5t583_reg_enable,
	198	.disable = rc5t583_reg_disable,
	199	.enable_time = rc5t583_regulator_enable_time,
	200	.get_voltage_sel = rc5t583_get_voltage_sel,
f604c10c	201	.set_voltage = rc5t583_set_voltage,
6ffc3270 LD	202	.list_voltage = rc5t583_list_voltage,
	203	.set_voltage_time_sel = rc5t583_set_voltage_time_sel,
	204	};
	205
95e301ba AL	206	#define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \
95e301ba AL	207	_vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \
6ffc3270 LD	208	{ \
	209	.reg_en_reg = RC5T583_REG_##_en_reg, \
	210	.en_bit = _en_bit, \
	211	.reg_disc_reg = RC5T583_REG_##_disc_reg, \
	212	.disc_bit = _disc_bit, \
95e301ba	213	.vout_reg = RC5T583_REG_##_id##DAC, \
6ffc3270	214	.vout_mask = _vout_mask, \
95e301ba	215	.deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \
6ffc3270 LD	216	.min_uV = _min_mv * 1000, \
	217	.max_uV = _max_mv * 1000, \
	218	.step_uV = _step_uV, \
6ffc3270 LD	219	.enable_uv_per_us = _enable_mv * 1000, \
	220	.change_uv_per_us = 40 * 1000, \
	221	.deepsleep_id = RC5T583_DS_##_id, \
	222	.desc = { \
	223	.name = "rc5t583-regulator-"#_id, \
	224	.id = RC5T583_REGULATOR_##_id, \
e3a7384c	225	.n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \
6ffc3270 LD	226	.ops = &rc5t583_ops, \
	227	.type = REGULATOR_VOLTAGE, \
	228	.owner = THIS_MODULE, \
	229	}, \
	230	}
	231
	232	static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = {
95e301ba AL	233	RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4),
	234	RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14),
	235	RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14),
	236	RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14),
	237	RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160),
	238	RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160),
	239	RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160),
	240	RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160),
	241	RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133),
	242	RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267),
	243	RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133),
	244	RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233),
	245	RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233),
	246	RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133),
6ffc3270 LD	247	};
	248
	249	static int __devinit rc5t583_regulator_probe(struct platform_device *pdev)
	250	{
	251	struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
	252	struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
	253	struct regulator_init_data *reg_data;
	254	struct rc5t583_regulator *reg = NULL;
	255	struct rc5t583_regulator *regs;
	256	struct regulator_dev *rdev;
	257	struct rc5t583_regulator_info *ri;
	258	int ret;
	259	int id;
	260
	261	if (!pdata) {
	262	dev_err(&pdev->dev, "No platform data, exiting...\n");
	263	return -ENODEV;
	264	}
	265
	266	regs = devm_kzalloc(&pdev->dev, RC5T583_REGULATOR_MAX *
	267	sizeof(struct rc5t583_regulator), GFP_KERNEL);
	268	if (!regs) {
	269	dev_err(&pdev->dev, "Memory allocation failed exiting..\n");
	270	return -ENOMEM;
	271	}
	272
	273
	274	for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) {
	275	reg_data = pdata->reg_init_data[id];
	276
	277	/* No need to register if there is no regulator data */
	278	if (!reg_data)
	279	continue;
	280
	281	reg = &regs[id];
	282	ri = &rc5t583_reg_info[id];
	283	reg->reg_info = ri;
	284	reg->mfd = rc5t583;
	285	reg->dev = &pdev->dev;
	286
	287	if (ri->deepsleep_id == RC5T583_DS_NONE)
	288	goto skip_ext_pwr_config;
	289
	290	ret = rc5t583_ext_power_req_config(rc5t583->dev,
	291	ri->deepsleep_id,
	292	pdata->regulator_ext_pwr_control[id],
	293	pdata->regulator_deepsleep_slot[id]);
	294	/*
	295	* Configuring external control is not a major issue,
	296	* just give warning.
	297	*/
	298	if (ret < 0)
	299	dev_warn(&pdev->dev,
	300	"Failed to configure ext control %d\n", id);
	301
	302	skip_ext_pwr_config:
	303	rdev = regulator_register(&ri->desc, &pdev->dev,
	304	reg_data, reg, NULL);
a69df8a1	305	if (IS_ERR(rdev)) {
6ffc3270 LD	306	dev_err(&pdev->dev, "Failed to register regulator %s\n",
	307	ri->desc.name);
	308	ret = PTR_ERR(rdev);
	309	goto clean_exit;
	310	}
	311	reg->rdev = rdev;
	312	}
	313	platform_set_drvdata(pdev, regs);
	314	return 0;
	315
	316	clean_exit:
a69df8a1	317	while (--id >= 0)
6ffc3270 LD	318	regulator_unregister(regs[id].rdev);
	319
	320	return ret;
	321	}
	322
	323	static int __devexit rc5t583_regulator_remove(struct platform_device *pdev)
	324	{
	325	struct rc5t583_regulator *regs = platform_get_drvdata(pdev);
	326	int id;
	327
	328	for (id = 0; id < RC5T583_REGULATOR_MAX; ++id)
	329	regulator_unregister(regs[id].rdev);
	330	return 0;
	331	}
	332
	333	static struct platform_driver rc5t583_regulator_driver = {
	334	.driver = {
	335	.name = "rc5t583-regulator",
	336	.owner = THIS_MODULE,
	337	},
	338	.probe = rc5t583_regulator_probe,
	339	.remove = __devexit_p(rc5t583_regulator_remove),
	340	};
	341
	342	static int __init rc5t583_regulator_init(void)
	343	{
	344	return platform_driver_register(&rc5t583_regulator_driver);
	345	}
	346	subsys_initcall(rc5t583_regulator_init);
	347
	348	static void __exit rc5t583_regulator_exit(void)
	349	{
	350	platform_driver_unregister(&rc5t583_regulator_driver);
	351	}
	352	module_exit(rc5t583_regulator_exit);
	353
	354	MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
	355	MODULE_DESCRIPTION("RC5T583 regulator driver");
	356	MODULE_ALIAS("platform:rc5t583-regulator");
4eb06453	357	MODULE_LICENSE("GPL v2");