[GitHub/mt8127/android_kernel_alcatel_ttab.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/regulator/of_regulator.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 regulator_dev **rdev;
};

static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
	unsigned int ramp_value = RAMP_RATE_NO_CTRL;

	switch (ramp_delay) {
	case 1 ... 13750:
		ramp_value = RAMP_RATE_13P75MV;
		break;
	case 13751 ... 27500:
		ramp_value = RAMP_RATE_27P5MV;
		break;
	case 27501 ... 55000:
		ramp_value = RAMP_RATE_55MV;
		break;
	case 55001 ... 100000:
		break;
	default:
		pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
			rdev->desc->name, ramp_delay);
	}

	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
				  MAX77686_RAMP_RATE_MASK, ramp_value << 6);
}

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,
	.set_ramp_delay		= max77686_set_ramp_delay,
};

#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),
};

#ifdef CONFIG_OF
static int max77686_pmic_dt_parse_pdata(struct max77686_dev *iodev,
					struct max77686_platform_data *pdata)
{
	struct device_node *pmic_np, *regulators_np;
	struct max77686_regulator_data *rdata;
	struct of_regulator_match rmatch;
	unsigned int i;

	pmic_np = iodev->dev->of_node;
	regulators_np = of_find_node_by_name(pmic_np, "voltage-regulators");
	if (!regulators_np) {
		dev_err(iodev->dev, "could not find regulators sub-node\n");
		return -EINVAL;
	}

	pdata->num_regulators = ARRAY_SIZE(regulators);
	rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) *
			     pdata->num_regulators, GFP_KERNEL);
	if (!rdata) {
		dev_err(iodev->dev,
			"could not allocate memory for regulator data\n");
		return -ENOMEM;
	}

	for (i = 0; i < pdata->num_regulators; i++) {
		rmatch.name = regulators[i].name;
		rmatch.init_data = NULL;
		rmatch.of_node = NULL;
		of_regulator_match(iodev->dev, regulators_np, &rmatch, 1);
		rdata[i].initdata = rmatch.init_data;
	}

	pdata->regulators = rdata;

	return 0;
}
#else
static int max77686_pmic_dt_parse_pdata(struct max77686_dev *iodev,
					struct max77686_platform_data *pdata)
{
	return 0;
}
#endif /* CONFIG_OF */

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) {
		dev_err(&pdev->dev, "no platform data found for regulator\n");
		return -ENODEV;
	}

	if (iodev->dev->of_node) {
		ret = max77686_pmic_dt_parse_pdata(iodev, pdata);
		if (ret)
			return ret;
	}

	if (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;
	config.dev = &pdev->dev;
	config.regmap = iodev->regmap;
	platform_set_drvdata(pdev, max77686);

	for (i = 0; i < MAX77686_REGULATORS; i++) {
		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(&pdev->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>
4706fcab	34	#include <linux/regulator/of_regulator.h>
133d4016 JL	35	#include <linux/mfd/max77686.h>
	36	#include <linux/mfd/max77686-private.h>
	37
	38	#define MAX77686_LDO_MINUV 800000
	39	#define MAX77686_LDO_UVSTEP 50000
	40	#define MAX77686_LDO_LOW_MINUV 800000
	41	#define MAX77686_LDO_LOW_UVSTEP 25000
	42	#define MAX77686_BUCK_MINUV 750000
	43	#define MAX77686_BUCK_UVSTEP 50000
852abad2 YSB	44	#define MAX77686_RAMP_DELAY 100000 /* uV/us */
852abad2 YSB	45	#define MAX77686_DVS_RAMP_DELAY 27500 /* uV/us */
133d4016 JL	46	#define MAX77686_DVS_MINUV 600000
	47	#define MAX77686_DVS_UVSTEP 12500
	48
	49	#define MAX77686_OPMODE_SHIFT 6
	50	#define MAX77686_OPMODE_BUCK234_SHIFT 4
	51	#define MAX77686_OPMODE_MASK 0x3
	52
	53	#define MAX77686_VSEL_MASK 0x3F
	54	#define MAX77686_DVS_VSEL_MASK 0xFF
	55
	56	#define MAX77686_RAMP_RATE_MASK 0xC0
	57
	58	#define MAX77686_REGULATORS MAX77686_REG_MAX
	59	#define MAX77686_LDOS 26
	60
	61	enum max77686_ramp_rate {
	62	RAMP_RATE_13P75MV,
	63	RAMP_RATE_27P5MV,
	64	RAMP_RATE_55MV,
	65	RAMP_RATE_NO_CTRL, /* 100mV/us */
	66	};
	67
	68	struct max77686_data {
133d4016	69	struct regulator_dev **rdev;
133d4016 JL	70	};
133d4016 JL	71
f503071b YSB	72	static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
	73	{
	74	unsigned int ramp_value = RAMP_RATE_NO_CTRL;
	75
	76	switch (ramp_delay) {
	77	case 1 ... 13750:
	78	ramp_value = RAMP_RATE_13P75MV;
	79	break;
	80	case 13751 ... 27500:
	81	ramp_value = RAMP_RATE_27P5MV;
	82	break;
	83	case 27501 ... 55000:
	84	ramp_value = RAMP_RATE_55MV;
	85	break;
	86	case 55001 ... 100000:
	87	break;
	88	default:
	89	pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
	90	rdev->desc->name, ramp_delay);
	91	}
	92
	93	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	94	MAX77686_RAMP_RATE_MASK, ramp_value << 6);
	95	}
	96
133d4016 JL	97	static struct regulator_ops max77686_ops = {
133d4016 JL	98	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	99	.map_voltage = regulator_map_voltage_linear,
133d4016 JL	100	.is_enabled = regulator_is_enabled_regmap,
	101	.enable = regulator_enable_regmap,
	102	.disable = regulator_disable_regmap,
	103	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	104	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	105	.set_voltage_time_sel = regulator_set_voltage_time_sel,
133d4016 JL	106	};
	107
	108	static struct regulator_ops max77686_buck_dvs_ops = {
	109	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	110	.map_voltage = regulator_map_voltage_linear,
133d4016 JL	111	.is_enabled = regulator_is_enabled_regmap,
	112	.enable = regulator_enable_regmap,
	113	.disable = regulator_disable_regmap,
	114	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	115	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	116	.set_voltage_time_sel = regulator_set_voltage_time_sel,
f503071b	117	.set_ramp_delay = max77686_set_ramp_delay,
133d4016 JL	118	};
	119
	120	#define regulator_desc_ldo(num) { \
	121	.name = "LDO"#num, \
	122	.id = MAX77686_LDO##num, \
	123	.ops = &max77686_ops, \
	124	.type = REGULATOR_VOLTAGE, \
	125	.owner = THIS_MODULE, \
	126	.min_uV = MAX77686_LDO_MINUV, \
	127	.uV_step = MAX77686_LDO_UVSTEP, \
852abad2	128	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	129	.n_voltages = MAX77686_VSEL_MASK + 1, \
	130	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	131	.vsel_mask = MAX77686_VSEL_MASK, \
	132	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	133	.enable_mask = MAX77686_OPMODE_MASK \
	134	<< MAX77686_OPMODE_SHIFT, \
	135	}
	136	#define regulator_desc_ldo_low(num) { \
	137	.name = "LDO"#num, \
	138	.id = MAX77686_LDO##num, \
	139	.ops = &max77686_ops, \
	140	.type = REGULATOR_VOLTAGE, \
	141	.owner = THIS_MODULE, \
	142	.min_uV = MAX77686_LDO_LOW_MINUV, \
	143	.uV_step = MAX77686_LDO_LOW_UVSTEP, \
852abad2	144	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	145	.n_voltages = MAX77686_VSEL_MASK + 1, \
	146	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	147	.vsel_mask = MAX77686_VSEL_MASK, \
	148	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	149	.enable_mask = MAX77686_OPMODE_MASK \
	150	<< MAX77686_OPMODE_SHIFT, \
	151	}
	152	#define regulator_desc_buck(num) { \
	153	.name = "BUCK"#num, \
	154	.id = MAX77686_BUCK##num, \
	155	.ops = &max77686_ops, \
	156	.type = REGULATOR_VOLTAGE, \
	157	.owner = THIS_MODULE, \
	158	.min_uV = MAX77686_BUCK_MINUV, \
	159	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	160	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	161	.n_voltages = MAX77686_VSEL_MASK + 1, \
	162	.vsel_reg = MAX77686_REG_BUCK5OUT + (num - 5) * 2, \
	163	.vsel_mask = MAX77686_VSEL_MASK, \
	164	.enable_reg = MAX77686_REG_BUCK5CTRL + (num - 5) * 2, \
	165	.enable_mask = MAX77686_OPMODE_MASK, \
	166	}
	167	#define regulator_desc_buck1(num) { \
	168	.name = "BUCK"#num, \
	169	.id = MAX77686_BUCK##num, \
	170	.ops = &max77686_ops, \
	171	.type = REGULATOR_VOLTAGE, \
	172	.owner = THIS_MODULE, \
	173	.min_uV = MAX77686_BUCK_MINUV, \
	174	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	175	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	176	.n_voltages = MAX77686_VSEL_MASK + 1, \
	177	.vsel_reg = MAX77686_REG_BUCK1OUT, \
	178	.vsel_mask = MAX77686_VSEL_MASK, \
	179	.enable_reg = MAX77686_REG_BUCK1CTRL, \
	180	.enable_mask = MAX77686_OPMODE_MASK, \
	181	}
	182	#define regulator_desc_buck_dvs(num) { \
	183	.name = "BUCK"#num, \
	184	.id = MAX77686_BUCK##num, \
74adfee5	185	.ops = &max77686_buck_dvs_ops, \
133d4016 JL	186	.type = REGULATOR_VOLTAGE, \
	187	.owner = THIS_MODULE, \
	188	.min_uV = MAX77686_DVS_MINUV, \
	189	.uV_step = MAX77686_DVS_UVSTEP, \
852abad2	190	.ramp_delay = MAX77686_DVS_RAMP_DELAY, \
133d4016 JL	191	.n_voltages = MAX77686_DVS_VSEL_MASK + 1, \
	192	.vsel_reg = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10, \
	193	.vsel_mask = MAX77686_DVS_VSEL_MASK, \
	194	.enable_reg = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10, \
	195	.enable_mask = MAX77686_OPMODE_MASK \
	196	<< MAX77686_OPMODE_BUCK234_SHIFT, \
	197	}
	198
	199	static struct regulator_desc regulators[] = {
	200	regulator_desc_ldo_low(1),
	201	regulator_desc_ldo_low(2),
	202	regulator_desc_ldo(3),
	203	regulator_desc_ldo(4),
	204	regulator_desc_ldo(5),
	205	regulator_desc_ldo_low(6),
	206	regulator_desc_ldo_low(7),
	207	regulator_desc_ldo_low(8),
	208	regulator_desc_ldo(9),
	209	regulator_desc_ldo(10),
	210	regulator_desc_ldo(11),
	211	regulator_desc_ldo(12),
	212	regulator_desc_ldo(13),
	213	regulator_desc_ldo(14),
	214	regulator_desc_ldo_low(15),
	215	regulator_desc_ldo(16),
	216	regulator_desc_ldo(17),
	217	regulator_desc_ldo(18),
	218	regulator_desc_ldo(19),
	219	regulator_desc_ldo(20),
	220	regulator_desc_ldo(21),
	221	regulator_desc_ldo(22),
	222	regulator_desc_ldo(23),
	223	regulator_desc_ldo(24),
	224	regulator_desc_ldo(25),
	225	regulator_desc_ldo(26),
	226	regulator_desc_buck1(1),
	227	regulator_desc_buck_dvs(2),
	228	regulator_desc_buck_dvs(3),
	229	regulator_desc_buck_dvs(4),
	230	regulator_desc_buck(5),
	231	regulator_desc_buck(6),
	232	regulator_desc_buck(7),
	233	regulator_desc_buck(8),
	234	regulator_desc_buck(9),
	235	};
	236
4706fcab YSB	237	#ifdef CONFIG_OF
	238	static int max77686_pmic_dt_parse_pdata(struct max77686_dev *iodev,
	239	struct max77686_platform_data *pdata)
	240	{
	241	struct device_node pmic_np, regulators_np;
	242	struct max77686_regulator_data *rdata;
	243	struct of_regulator_match rmatch;
	244	unsigned int i;
	245
	246	pmic_np = iodev->dev->of_node;
	247	regulators_np = of_find_node_by_name(pmic_np, "voltage-regulators");
	248	if (!regulators_np) {
	249	dev_err(iodev->dev, "could not find regulators sub-node\n");
	250	return -EINVAL;
	251	}
	252
	253	pdata->num_regulators = ARRAY_SIZE(regulators);
	254	rdata = devm_kzalloc(iodev->dev, sizeof(rdata)
	255	pdata->num_regulators, GFP_KERNEL);
	256	if (!rdata) {
	257	dev_err(iodev->dev,
	258	"could not allocate memory for regulator data\n");
	259	return -ENOMEM;
	260	}
	261
	262	for (i = 0; i < pdata->num_regulators; i++) {
	263	rmatch.name = regulators[i].name;
	264	rmatch.init_data = NULL;
d1ef065d	265	rmatch.of_node = NULL;
4706fcab YSB	266	of_regulator_match(iodev->dev, regulators_np, &rmatch, 1);
	267	rdata[i].initdata = rmatch.init_data;
	268	}
	269
	270	pdata->regulators = rdata;
	271
	272	return 0;
	273	}
	274	#else
	275	static int max77686_pmic_dt_parse_pdata(struct max77686_dev *iodev,
	276	struct max77686_platform_data *pdata)
	277	{
	278	return 0;
	279	}
	280	#endif /* CONFIG_OF */
	281
133d4016 JL	282	static __devinit int max77686_pmic_probe(struct platform_device *pdev)
	283	{
	284	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	285	struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
	286	struct regulator_dev **rdev;
	287	struct max77686_data *max77686;
	288	int i, size;
	289	int ret = 0;
c59d2a6b	290	struct regulator_config config = { };
133d4016 JL	291
	292	dev_dbg(&pdev->dev, "%s\n", __func__);
	293
4706fcab YSB	294	if (!pdata) {
	295	dev_err(&pdev->dev, "no platform data found for regulator\n");
	296	return -ENODEV;
	297	}
	298
	299	if (iodev->dev->of_node) {
	300	ret = max77686_pmic_dt_parse_pdata(iodev, pdata);
	301	if (ret)
	302	return ret;
	303	}
	304
	305	if (pdata->num_regulators != MAX77686_REGULATORS) {
ab0d1cbe AL	306	dev_err(&pdev->dev,
	307	"Invalid initial data for regulator's initialiation\n");
	308	return -EINVAL;
	309	}
	310
133d4016 JL	311	max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
	312	GFP_KERNEL);
	313	if (!max77686)
	314	return -ENOMEM;
	315
	316	size = sizeof(struct regulator_dev ) MAX77686_REGULATORS;
	317	max77686->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
	318	if (!max77686->rdev)
	319	return -ENOMEM;
	320
	321	rdev = max77686->rdev;
f503071b YSB	322	config.dev = &pdev->dev;
f503071b YSB	323	config.regmap = iodev->regmap;
133d4016 JL	324	platform_set_drvdata(pdev, max77686);
133d4016 JL	325
ab0d1cbe	326	for (i = 0; i < MAX77686_REGULATORS; i++) {
ab0d1cbe	327	config.init_data = pdata->regulators[i].initdata;
133d4016	328
ab0d1cbe AL	329	rdev[i] = regulator_register(&regulators[i], &config);
	330	if (IS_ERR(rdev[i])) {
	331	ret = PTR_ERR(rdev[i]);
f503071b	332	dev_err(&pdev->dev,
133d4016 JL	333	"regulator init failed for %d\n", i);
	334	rdev[i] = NULL;
	335	goto err;
133d4016	336	}
133d4016	337	}
ab0d1cbe	338
133d4016 JL	339	return 0;
133d4016 JL	340	err:
ab0d1cbe AL	341	while (--i >= 0)
ab0d1cbe AL	342	regulator_unregister(rdev[i]);
133d4016 JL	343	return ret;
	344	}
	345
	346	static int __devexit max77686_pmic_remove(struct platform_device *pdev)
	347	{
	348	struct max77686_data *max77686 = platform_get_drvdata(pdev);
	349	struct regulator_dev **rdev = max77686->rdev;
	350	int i;
	351
	352	for (i = 0; i < MAX77686_REGULATORS; i++)
	353	if (rdev[i])
	354	regulator_unregister(rdev[i]);
	355
	356	return 0;
	357	}
	358
	359	static const struct platform_device_id max77686_pmic_id[] = {
	360	{"max77686-pmic", 0},
	361	{ },
	362	};
	363	MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
	364
	365	static struct platform_driver max77686_pmic_driver = {
	366	.driver = {
	367	.name = "max77686-pmic",
	368	.owner = THIS_MODULE,
	369	},
	370	.probe = max77686_pmic_probe,
	371	.remove = __devexit_p(max77686_pmic_remove),
	372	.id_table = max77686_pmic_id,
	373	};
	374
	375	static int __init max77686_pmic_init(void)
	376	{
	377	return platform_driver_register(&max77686_pmic_driver);
	378	}
	379	subsys_initcall(max77686_pmic_init);
	380
	381	static void __exit max77686_pmic_cleanup(void)
	382	{
	383	platform_driver_unregister(&max77686_pmic_driver);
	384	}
	385	module_exit(max77686_pmic_cleanup);
	386
	387	MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
	388	MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
	389	MODULE_LICENSE("GPL");