[mirror_ubuntu-artful-kernel.git] / drivers / regulator / max77686.c

/*
 * max77686.c - Regulator driver for the Maxim 77686
 *
 * Copyright (C) 2012 Samsung Electronics
 * Chiwoong Byun <woong.byun@smasung.com>
 * Jonghwa Lee <jonghwa3.lee@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * This driver is based on max8997.c
 */

#include <linux/kernel.h>
#include <linux/bug.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/max77686.h>
#include <linux/mfd/max77686-private.h>

#define MAX77686_LDO_MINUV	800000
#define MAX77686_LDO_UVSTEP	50000
#define MAX77686_LDO_LOW_MINUV	800000
#define MAX77686_LDO_LOW_UVSTEP	25000
#define MAX77686_BUCK_MINUV	750000
#define MAX77686_BUCK_UVSTEP	50000
#define MAX77686_RAMP_DELAY	100000			/* uV/us */
#define MAX77686_DVS_RAMP_DELAY	27500			/* uV/us */
#define MAX77686_DVS_MINUV	600000
#define MAX77686_DVS_UVSTEP	12500

#define MAX77686_OPMODE_SHIFT	6
#define MAX77686_OPMODE_BUCK234_SHIFT	4
#define MAX77686_OPMODE_MASK	0x3

#define MAX77686_VSEL_MASK	0x3F
#define MAX77686_DVS_VSEL_MASK	0xFF

#define MAX77686_RAMP_RATE_MASK	0xC0

#define MAX77686_REGULATORS	MAX77686_REG_MAX
#define MAX77686_LDOS		26

enum max77686_ramp_rate {
	RAMP_RATE_13P75MV,
	RAMP_RATE_27P5MV,
	RAMP_RATE_55MV,
	RAMP_RATE_NO_CTRL,	/* 100mV/us */
};

struct max77686_data {
	struct device *dev;
	struct max77686_dev *iodev;
	struct regulator_dev **rdev;
};

static struct regulator_ops max77686_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
};

static struct regulator_ops max77686_buck_dvs_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
};

#define regulator_desc_ldo(num)		{				\
	.name		= "LDO"#num,					\
	.id		= MAX77686_LDO##num,				\
	.ops		= &max77686_ops,				\
	.type		= REGULATOR_VOLTAGE,				\
	.owner		= THIS_MODULE,					\
	.min_uV		= MAX77686_LDO_MINUV,				\
	.uV_step	= MAX77686_LDO_UVSTEP,				\
	.ramp_delay	= MAX77686_RAMP_DELAY,				\
	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
	.vsel_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
	.vsel_mask	= MAX77686_VSEL_MASK,				\
	.enable_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
	.enable_mask	= MAX77686_OPMODE_MASK				\
			<< MAX77686_OPMODE_SHIFT,			\
}
#define regulator_desc_ldo_low(num)		{			\
	.name		= "LDO"#num,					\
	.id		= MAX77686_LDO##num,				\
	.ops		= &max77686_ops,				\
	.type		= REGULATOR_VOLTAGE,				\
	.owner		= THIS_MODULE,					\
	.min_uV		= MAX77686_LDO_LOW_MINUV,			\
	.uV_step	= MAX77686_LDO_LOW_UVSTEP,			\
	.ramp_delay	= MAX77686_RAMP_DELAY,				\
	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
	.vsel_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
	.vsel_mask	= MAX77686_VSEL_MASK,				\
	.enable_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
	.enable_mask	= MAX77686_OPMODE_MASK				\
			<< MAX77686_OPMODE_SHIFT,			\
}
#define regulator_desc_buck(num)		{			\
	.name		= "BUCK"#num,					\
	.id		= MAX77686_BUCK##num,				\
	.ops		= &max77686_ops,				\
	.type		= REGULATOR_VOLTAGE,				\
	.owner		= THIS_MODULE,					\
	.min_uV		= MAX77686_BUCK_MINUV,				\
	.uV_step	= MAX77686_BUCK_UVSTEP,				\
	.ramp_delay	= MAX77686_RAMP_DELAY,				\
	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
	.vsel_reg	= MAX77686_REG_BUCK5OUT + (num - 5) * 2,	\
	.vsel_mask	= MAX77686_VSEL_MASK,				\
	.enable_reg	= MAX77686_REG_BUCK5CTRL + (num - 5) * 2,	\
	.enable_mask	= MAX77686_OPMODE_MASK,				\
}
#define regulator_desc_buck1(num)		{			\
	.name		= "BUCK"#num,					\
	.id		= MAX77686_BUCK##num,				\
	.ops		= &max77686_ops,				\
	.type		= REGULATOR_VOLTAGE,				\
	.owner		= THIS_MODULE,					\
	.min_uV		= MAX77686_BUCK_MINUV,				\
	.uV_step	= MAX77686_BUCK_UVSTEP,				\
	.ramp_delay	= MAX77686_RAMP_DELAY,				\
	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
	.vsel_reg	= MAX77686_REG_BUCK1OUT,			\
	.vsel_mask	= MAX77686_VSEL_MASK,				\
	.enable_reg	= MAX77686_REG_BUCK1CTRL,			\
	.enable_mask	= MAX77686_OPMODE_MASK,				\
}
#define regulator_desc_buck_dvs(num)		{			\
	.name		= "BUCK"#num,					\
	.id		= MAX77686_BUCK##num,				\
	.ops		= &max77686_buck_dvs_ops,			\
	.type		= REGULATOR_VOLTAGE,				\
	.owner		= THIS_MODULE,					\
	.min_uV		= MAX77686_DVS_MINUV,				\
	.uV_step	= MAX77686_DVS_UVSTEP,				\
	.ramp_delay	= MAX77686_DVS_RAMP_DELAY,			\
	.n_voltages	= MAX77686_DVS_VSEL_MASK + 1,			\
	.vsel_reg	= MAX77686_REG_BUCK2DVS1 + (num - 2) * 10,	\
	.vsel_mask	= MAX77686_DVS_VSEL_MASK,			\
	.enable_reg	= MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10,	\
	.enable_mask	= MAX77686_OPMODE_MASK				\
			<< MAX77686_OPMODE_BUCK234_SHIFT,		\
}

static struct regulator_desc regulators[] = {
	regulator_desc_ldo_low(1),
	regulator_desc_ldo_low(2),
	regulator_desc_ldo(3),
	regulator_desc_ldo(4),
	regulator_desc_ldo(5),
	regulator_desc_ldo_low(6),
	regulator_desc_ldo_low(7),
	regulator_desc_ldo_low(8),
	regulator_desc_ldo(9),
	regulator_desc_ldo(10),
	regulator_desc_ldo(11),
	regulator_desc_ldo(12),
	regulator_desc_ldo(13),
	regulator_desc_ldo(14),
	regulator_desc_ldo_low(15),
	regulator_desc_ldo(16),
	regulator_desc_ldo(17),
	regulator_desc_ldo(18),
	regulator_desc_ldo(19),
	regulator_desc_ldo(20),
	regulator_desc_ldo(21),
	regulator_desc_ldo(22),
	regulator_desc_ldo(23),
	regulator_desc_ldo(24),
	regulator_desc_ldo(25),
	regulator_desc_ldo(26),
	regulator_desc_buck1(1),
	regulator_desc_buck_dvs(2),
	regulator_desc_buck_dvs(3),
	regulator_desc_buck_dvs(4),
	regulator_desc_buck(5),
	regulator_desc_buck(6),
	regulator_desc_buck(7),
	regulator_desc_buck(8),
	regulator_desc_buck(9),
};

static __devinit int max77686_pmic_probe(struct platform_device *pdev)
{
	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
	struct regulator_dev **rdev;
	struct max77686_data *max77686;
	int i,  size;
	int ret = 0;
	struct regulator_config config = { };

	dev_dbg(&pdev->dev, "%s\n", __func__);

	if (!pdata || pdata->num_regulators != MAX77686_REGULATORS) {
		dev_err(&pdev->dev,
			"Invalid initial data for regulator's initialiation\n");
		return -EINVAL;
	}

	max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
				GFP_KERNEL);
	if (!max77686)
		return -ENOMEM;

	size = sizeof(struct regulator_dev *) * MAX77686_REGULATORS;
	max77686->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
	if (!max77686->rdev)
		return -ENOMEM;

	rdev = max77686->rdev;
	max77686->dev = &pdev->dev;
	max77686->iodev = iodev;
	platform_set_drvdata(pdev, max77686);

	for (i = 0; i < MAX77686_REGULATORS; i++) {
		config.dev = max77686->dev;
		config.regmap = iodev->regmap;
		config.driver_data = max77686;
		config.init_data = pdata->regulators[i].initdata;

		rdev[i] = regulator_register(&regulators[i], &config);
		if (IS_ERR(rdev[i])) {
			ret = PTR_ERR(rdev[i]);
			dev_err(max77686->dev,
				"regulator init failed for %d\n", i);
				rdev[i] = NULL;
				goto err;
		}
	}

	return 0;
err:
	while (--i >= 0)
		regulator_unregister(rdev[i]);
	return ret;
}

static int __devexit max77686_pmic_remove(struct platform_device *pdev)
{
	struct max77686_data *max77686 = platform_get_drvdata(pdev);
	struct regulator_dev **rdev = max77686->rdev;
	int i;

	for (i = 0; i < MAX77686_REGULATORS; i++)
		if (rdev[i])
			regulator_unregister(rdev[i]);

	return 0;
}

static const struct platform_device_id max77686_pmic_id[] = {
	{"max77686-pmic", 0},
	{ },
};
MODULE_DEVICE_TABLE(platform, max77686_pmic_id);

static struct platform_driver max77686_pmic_driver = {
	.driver = {
		.name = "max77686-pmic",
		.owner = THIS_MODULE,
	},
	.probe = max77686_pmic_probe,
	.remove = __devexit_p(max77686_pmic_remove),
	.id_table = max77686_pmic_id,
};

static int __init max77686_pmic_init(void)
{
	return platform_driver_register(&max77686_pmic_driver);
}
subsys_initcall(max77686_pmic_init);

static void __exit max77686_pmic_cleanup(void)
{
	platform_driver_unregister(&max77686_pmic_driver);
}
module_exit(max77686_pmic_cleanup);

MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
133d4016 JL	1	/*
	2	* max77686.c - Regulator driver for the Maxim 77686
	3	*
	4	* Copyright (C) 2012 Samsung Electronics
	5	* Chiwoong Byun <woong.byun@smasung.com>
	6	* Jonghwa Lee <jonghwa3.lee@samsung.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*
	22	* This driver is based on max8997.c
	23	*/
	24
	25	#include <linux/kernel.h>
	26	#include <linux/bug.h>
	27	#include <linux/delay.h>
	28	#include <linux/err.h>
	29	#include <linux/gpio.h>
	30	#include <linux/slab.h>
	31	#include <linux/platform_device.h>
	32	#include <linux/regulator/driver.h>
	33	#include <linux/regulator/machine.h>
	34	#include <linux/mfd/max77686.h>
	35	#include <linux/mfd/max77686-private.h>
	36
	37	#define MAX77686_LDO_MINUV 800000
	38	#define MAX77686_LDO_UVSTEP 50000
	39	#define MAX77686_LDO_LOW_MINUV 800000
	40	#define MAX77686_LDO_LOW_UVSTEP 25000
	41	#define MAX77686_BUCK_MINUV 750000
	42	#define MAX77686_BUCK_UVSTEP 50000
852abad2 YSB	43	#define MAX77686_RAMP_DELAY 100000 /* uV/us */
852abad2 YSB	44	#define MAX77686_DVS_RAMP_DELAY 27500 /* uV/us */
133d4016 JL	45	#define MAX77686_DVS_MINUV 600000
	46	#define MAX77686_DVS_UVSTEP 12500
	47
	48	#define MAX77686_OPMODE_SHIFT 6
	49	#define MAX77686_OPMODE_BUCK234_SHIFT 4
	50	#define MAX77686_OPMODE_MASK 0x3
	51
	52	#define MAX77686_VSEL_MASK 0x3F
	53	#define MAX77686_DVS_VSEL_MASK 0xFF
	54
	55	#define MAX77686_RAMP_RATE_MASK 0xC0
	56
	57	#define MAX77686_REGULATORS MAX77686_REG_MAX
	58	#define MAX77686_LDOS 26
	59
	60	enum max77686_ramp_rate {
	61	RAMP_RATE_13P75MV,
	62	RAMP_RATE_27P5MV,
	63	RAMP_RATE_55MV,
	64	RAMP_RATE_NO_CTRL, /* 100mV/us */
	65	};
	66
	67	struct max77686_data {
	68	struct device *dev;
	69	struct max77686_dev *iodev;
133d4016	70	struct regulator_dev **rdev;
133d4016 JL	71	};
133d4016 JL	72
133d4016 JL	73	static struct regulator_ops max77686_ops = {
133d4016 JL	74	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	75	.map_voltage = regulator_map_voltage_linear,
133d4016 JL	76	.is_enabled = regulator_is_enabled_regmap,
	77	.enable = regulator_enable_regmap,
	78	.disable = regulator_disable_regmap,
	79	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	80	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	81	.set_voltage_time_sel = regulator_set_voltage_time_sel,
133d4016 JL	82	};
	83
	84	static struct regulator_ops max77686_buck_dvs_ops = {
	85	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	86	.map_voltage = regulator_map_voltage_linear,
133d4016 JL	87	.is_enabled = regulator_is_enabled_regmap,
	88	.enable = regulator_enable_regmap,
	89	.disable = regulator_disable_regmap,
	90	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	91	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	92	.set_voltage_time_sel = regulator_set_voltage_time_sel,
133d4016 JL	93	};
	94
	95	#define regulator_desc_ldo(num) { \
	96	.name = "LDO"#num, \
	97	.id = MAX77686_LDO##num, \
	98	.ops = &max77686_ops, \
	99	.type = REGULATOR_VOLTAGE, \
	100	.owner = THIS_MODULE, \
	101	.min_uV = MAX77686_LDO_MINUV, \
	102	.uV_step = MAX77686_LDO_UVSTEP, \
852abad2	103	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	104	.n_voltages = MAX77686_VSEL_MASK + 1, \
	105	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	106	.vsel_mask = MAX77686_VSEL_MASK, \
	107	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	108	.enable_mask = MAX77686_OPMODE_MASK \
	109	<< MAX77686_OPMODE_SHIFT, \
	110	}
	111	#define regulator_desc_ldo_low(num) { \
	112	.name = "LDO"#num, \
	113	.id = MAX77686_LDO##num, \
	114	.ops = &max77686_ops, \
	115	.type = REGULATOR_VOLTAGE, \
	116	.owner = THIS_MODULE, \
	117	.min_uV = MAX77686_LDO_LOW_MINUV, \
	118	.uV_step = MAX77686_LDO_LOW_UVSTEP, \
852abad2	119	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	120	.n_voltages = MAX77686_VSEL_MASK + 1, \
	121	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	122	.vsel_mask = MAX77686_VSEL_MASK, \
	123	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	124	.enable_mask = MAX77686_OPMODE_MASK \
	125	<< MAX77686_OPMODE_SHIFT, \
	126	}
	127	#define regulator_desc_buck(num) { \
	128	.name = "BUCK"#num, \
	129	.id = MAX77686_BUCK##num, \
	130	.ops = &max77686_ops, \
	131	.type = REGULATOR_VOLTAGE, \
	132	.owner = THIS_MODULE, \
	133	.min_uV = MAX77686_BUCK_MINUV, \
	134	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	135	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	136	.n_voltages = MAX77686_VSEL_MASK + 1, \
	137	.vsel_reg = MAX77686_REG_BUCK5OUT + (num - 5) * 2, \
	138	.vsel_mask = MAX77686_VSEL_MASK, \
	139	.enable_reg = MAX77686_REG_BUCK5CTRL + (num - 5) * 2, \
	140	.enable_mask = MAX77686_OPMODE_MASK, \
	141	}
	142	#define regulator_desc_buck1(num) { \
	143	.name = "BUCK"#num, \
	144	.id = MAX77686_BUCK##num, \
	145	.ops = &max77686_ops, \
	146	.type = REGULATOR_VOLTAGE, \
	147	.owner = THIS_MODULE, \
	148	.min_uV = MAX77686_BUCK_MINUV, \
	149	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	150	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	151	.n_voltages = MAX77686_VSEL_MASK + 1, \
	152	.vsel_reg = MAX77686_REG_BUCK1OUT, \
	153	.vsel_mask = MAX77686_VSEL_MASK, \
	154	.enable_reg = MAX77686_REG_BUCK1CTRL, \
	155	.enable_mask = MAX77686_OPMODE_MASK, \
	156	}
	157	#define regulator_desc_buck_dvs(num) { \
	158	.name = "BUCK"#num, \
	159	.id = MAX77686_BUCK##num, \
74adfee5	160	.ops = &max77686_buck_dvs_ops, \
133d4016 JL	161	.type = REGULATOR_VOLTAGE, \
	162	.owner = THIS_MODULE, \
	163	.min_uV = MAX77686_DVS_MINUV, \
	164	.uV_step = MAX77686_DVS_UVSTEP, \
852abad2	165	.ramp_delay = MAX77686_DVS_RAMP_DELAY, \
133d4016 JL	166	.n_voltages = MAX77686_DVS_VSEL_MASK + 1, \
	167	.vsel_reg = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10, \
	168	.vsel_mask = MAX77686_DVS_VSEL_MASK, \
	169	.enable_reg = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10, \
	170	.enable_mask = MAX77686_OPMODE_MASK \
	171	<< MAX77686_OPMODE_BUCK234_SHIFT, \
	172	}
	173
	174	static struct regulator_desc regulators[] = {
	175	regulator_desc_ldo_low(1),
	176	regulator_desc_ldo_low(2),
	177	regulator_desc_ldo(3),
	178	regulator_desc_ldo(4),
	179	regulator_desc_ldo(5),
	180	regulator_desc_ldo_low(6),
	181	regulator_desc_ldo_low(7),
	182	regulator_desc_ldo_low(8),
	183	regulator_desc_ldo(9),
	184	regulator_desc_ldo(10),
	185	regulator_desc_ldo(11),
	186	regulator_desc_ldo(12),
	187	regulator_desc_ldo(13),
	188	regulator_desc_ldo(14),
	189	regulator_desc_ldo_low(15),
	190	regulator_desc_ldo(16),
	191	regulator_desc_ldo(17),
	192	regulator_desc_ldo(18),
	193	regulator_desc_ldo(19),
	194	regulator_desc_ldo(20),
	195	regulator_desc_ldo(21),
	196	regulator_desc_ldo(22),
	197	regulator_desc_ldo(23),
	198	regulator_desc_ldo(24),
	199	regulator_desc_ldo(25),
	200	regulator_desc_ldo(26),
	201	regulator_desc_buck1(1),
	202	regulator_desc_buck_dvs(2),
	203	regulator_desc_buck_dvs(3),
	204	regulator_desc_buck_dvs(4),
	205	regulator_desc_buck(5),
	206	regulator_desc_buck(6),
	207	regulator_desc_buck(7),
	208	regulator_desc_buck(8),
	209	regulator_desc_buck(9),
	210	};
	211
	212	static __devinit int max77686_pmic_probe(struct platform_device *pdev)
	213	{
	214	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	215	struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
	216	struct regulator_dev **rdev;
	217	struct max77686_data *max77686;
	218	int i, size;
	219	int ret = 0;
c59d2a6b	220	struct regulator_config config = { };
133d4016 JL	221
	222	dev_dbg(&pdev->dev, "%s\n", __func__);
	223
ab0d1cbe AL	224	if (!pdata \|\| pdata->num_regulators != MAX77686_REGULATORS) {
	225	dev_err(&pdev->dev,
	226	"Invalid initial data for regulator's initialiation\n");
	227	return -EINVAL;
	228	}
	229
133d4016 JL	230	max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
	231	GFP_KERNEL);
	232	if (!max77686)
	233	return -ENOMEM;
	234
	235	size = sizeof(struct regulator_dev ) MAX77686_REGULATORS;
	236	max77686->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
	237	if (!max77686->rdev)
	238	return -ENOMEM;
	239
	240	rdev = max77686->rdev;
	241	max77686->dev = &pdev->dev;
	242	max77686->iodev = iodev;
133d4016 JL	243	platform_set_drvdata(pdev, max77686);
133d4016 JL	244
ab0d1cbe AL	245	for (i = 0; i < MAX77686_REGULATORS; i++) {
	246	config.dev = max77686->dev;
	247	config.regmap = iodev->regmap;
	248	config.driver_data = max77686;
	249	config.init_data = pdata->regulators[i].initdata;
133d4016	250
ab0d1cbe AL	251	rdev[i] = regulator_register(&regulators[i], &config);
	252	if (IS_ERR(rdev[i])) {
	253	ret = PTR_ERR(rdev[i]);
	254	dev_err(max77686->dev,
133d4016 JL	255	"regulator init failed for %d\n", i);
	256	rdev[i] = NULL;
	257	goto err;
133d4016	258	}
133d4016	259	}
ab0d1cbe	260
133d4016 JL	261	return 0;
133d4016 JL	262	err:
ab0d1cbe AL	263	while (--i >= 0)
ab0d1cbe AL	264	regulator_unregister(rdev[i]);
133d4016 JL	265	return ret;
	266	}
	267
	268	static int __devexit max77686_pmic_remove(struct platform_device *pdev)
	269	{
	270	struct max77686_data *max77686 = platform_get_drvdata(pdev);
	271	struct regulator_dev **rdev = max77686->rdev;
	272	int i;
	273
	274	for (i = 0; i < MAX77686_REGULATORS; i++)
	275	if (rdev[i])
	276	regulator_unregister(rdev[i]);
	277
	278	return 0;
	279	}
	280
	281	static const struct platform_device_id max77686_pmic_id[] = {
	282	{"max77686-pmic", 0},
	283	{ },
	284	};
	285	MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
	286
	287	static struct platform_driver max77686_pmic_driver = {
	288	.driver = {
	289	.name = "max77686-pmic",
	290	.owner = THIS_MODULE,
	291	},
	292	.probe = max77686_pmic_probe,
	293	.remove = __devexit_p(max77686_pmic_remove),
	294	.id_table = max77686_pmic_id,
	295	};
	296
	297	static int __init max77686_pmic_init(void)
	298	{
	299	return platform_driver_register(&max77686_pmic_driver);
	300	}
	301	subsys_initcall(max77686_pmic_init);
	302
	303	static void __exit max77686_pmic_cleanup(void)
	304	{
	305	platform_driver_unregister(&max77686_pmic_driver);
	306	}
	307	module_exit(max77686_pmic_cleanup);
	308
	309	MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
	310	MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
	311	MODULE_LICENSE("GPL");