[mirror_ubuntu-bionic-kernel.git] / drivers / regulator / max14577-regulator.c

/*
 * max14577.c - Regulator driver for the Maxim 14577/77836
 *
 * Copyright (C) 2013,2014 Samsung Electronics
 * Krzysztof Kozlowski <krzk@kernel.org>
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/mfd/max14577.h>
#include <linux/mfd/max14577-private.h>
#include <linux/regulator/of_regulator.h>

static int max14577_reg_is_enabled(struct regulator_dev *rdev)
{
	int rid = rdev_get_id(rdev);
	struct regmap *rmap = rdev->regmap;
	u8 reg_data;

	switch (rid) {
	case MAX14577_CHARGER:
		max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, &reg_data);
		if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0)
			return 0;
		max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
		if ((reg_data & STATUS3_CGMBC_MASK) == 0)
			return 0;
		/* MBCHOSTEN and CGMBC are on */
		return 1;
	default:
		return -EINVAL;
	}
}

static int max14577_reg_get_current_limit(struct regulator_dev *rdev)
{
	u8 reg_data;
	struct regmap *rmap = rdev->regmap;
	struct max14577 *max14577 = rdev_get_drvdata(rdev);
	const struct maxim_charger_current *limits =
		&maxim_charger_currents[max14577->dev_type];

	if (rdev_get_id(rdev) != MAX14577_CHARGER)
		return -EINVAL;

	max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL4, &reg_data);

	if ((reg_data & CHGCTRL4_MBCICHWRCL_MASK) == 0)
		return limits->min;

	reg_data = ((reg_data & CHGCTRL4_MBCICHWRCH_MASK) >>
			CHGCTRL4_MBCICHWRCH_SHIFT);
	return limits->high_start + reg_data * limits->high_step;
}

static int max14577_reg_set_current_limit(struct regulator_dev *rdev,
		int min_uA, int max_uA)
{
	u8 reg_data;
	int ret;
	struct max14577 *max14577 = rdev_get_drvdata(rdev);
	const struct maxim_charger_current *limits =
		&maxim_charger_currents[max14577->dev_type];

	if (rdev_get_id(rdev) != MAX14577_CHARGER)
		return -EINVAL;

	ret = maxim_charger_calc_reg_current(limits, min_uA, max_uA, &reg_data);
	if (ret)
		return ret;

	return max14577_update_reg(rdev->regmap, MAX14577_CHG_REG_CHG_CTRL4,
			CHGCTRL4_MBCICHWRCL_MASK | CHGCTRL4_MBCICHWRCH_MASK,
			reg_data);
}

static struct regulator_ops max14577_safeout_ops = {
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.list_voltage		= regulator_list_voltage_linear,
};

static struct regulator_ops max14577_charger_ops = {
	.is_enabled		= max14577_reg_is_enabled,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.get_current_limit	= max14577_reg_get_current_limit,
	.set_current_limit	= max14577_reg_set_current_limit,
};

#define MAX14577_SAFEOUT_REG	{ \
	.name		= "SAFEOUT", \
	.of_match	= of_match_ptr("SAFEOUT"), \
	.regulators_node = of_match_ptr("regulators"), \
	.id		= MAX14577_SAFEOUT, \
	.ops		= &max14577_safeout_ops, \
	.type		= REGULATOR_VOLTAGE, \
	.owner		= THIS_MODULE, \
	.n_voltages	= 1, \
	.min_uV		= MAX14577_REGULATOR_SAFEOUT_VOLTAGE, \
	.enable_reg	= MAX14577_REG_CONTROL2, \
	.enable_mask	= CTRL2_SFOUTORD_MASK, \
}
#define MAX14577_CHARGER_REG	{ \
	.name		= "CHARGER", \
	.of_match	= of_match_ptr("CHARGER"), \
	.regulators_node = of_match_ptr("regulators"), \
	.id		= MAX14577_CHARGER, \
	.ops		= &max14577_charger_ops, \
	.type		= REGULATOR_CURRENT, \
	.owner		= THIS_MODULE, \
	.enable_reg	= MAX14577_CHG_REG_CHG_CTRL2, \
	.enable_mask	= CHGCTRL2_MBCHOSTEN_MASK, \
}

static const struct regulator_desc max14577_supported_regulators[] = {
	[MAX14577_SAFEOUT] = MAX14577_SAFEOUT_REG,
	[MAX14577_CHARGER] = MAX14577_CHARGER_REG,
};

static struct regulator_ops max77836_ldo_ops = {
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	/* TODO: add .set_suspend_mode */
};

#define MAX77836_LDO_REG(num)	{ \
	.name		= "LDO" # num, \
	.of_match	= of_match_ptr("LDO" # num), \
	.regulators_node = of_match_ptr("regulators"), \
	.id		= MAX77836_LDO ## num, \
	.ops		= &max77836_ldo_ops, \
	.type		= REGULATOR_VOLTAGE, \
	.owner		= THIS_MODULE, \
	.n_voltages	= MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM, \
	.min_uV		= MAX77836_REGULATOR_LDO_VOLTAGE_MIN, \
	.uV_step	= MAX77836_REGULATOR_LDO_VOLTAGE_STEP, \
	.enable_reg	= MAX77836_LDO_REG_CNFG1_LDO ## num, \
	.enable_mask	= MAX77836_CNFG1_LDO_PWRMD_MASK, \
	.vsel_reg	= MAX77836_LDO_REG_CNFG1_LDO ## num, \
	.vsel_mask	= MAX77836_CNFG1_LDO_TV_MASK, \
}

static const struct regulator_desc max77836_supported_regulators[] = {
	[MAX14577_SAFEOUT] = MAX14577_SAFEOUT_REG,
	[MAX14577_CHARGER] = MAX14577_CHARGER_REG,
	[MAX77836_LDO1] = MAX77836_LDO_REG(1),
	[MAX77836_LDO2] = MAX77836_LDO_REG(2),
};

#ifdef CONFIG_OF
static struct of_regulator_match max14577_regulator_matches[] = {
	{ .name	= "SAFEOUT", },
	{ .name = "CHARGER", },
};

static struct of_regulator_match max77836_regulator_matches[] = {
	{ .name	= "SAFEOUT", },
	{ .name = "CHARGER", },
	{ .name = "LDO1", },
	{ .name = "LDO2", },
};

static inline struct regulator_init_data *match_init_data(int index,
		enum maxim_device_type dev_type)
{
	switch (dev_type) {
	case MAXIM_DEVICE_TYPE_MAX77836:
		return max77836_regulator_matches[index].init_data;

	case MAXIM_DEVICE_TYPE_MAX14577:
	default:
		return max14577_regulator_matches[index].init_data;
	}
}

static inline struct device_node *match_of_node(int index,
		enum maxim_device_type dev_type)
{
	switch (dev_type) {
	case MAXIM_DEVICE_TYPE_MAX77836:
		return max77836_regulator_matches[index].of_node;

	case MAXIM_DEVICE_TYPE_MAX14577:
	default:
		return max14577_regulator_matches[index].of_node;
	}
}
#else /* CONFIG_OF */
static inline struct regulator_init_data *match_init_data(int index,
		enum maxim_device_type dev_type)
{
	return NULL;
}

static inline struct device_node *match_of_node(int index,
		enum maxim_device_type dev_type)
{
	return NULL;
}
#endif /* CONFIG_OF */

/**
 * Registers for regulators of max77836 use different I2C slave addresses so
 * different regmaps must be used for them.
 *
 * Returns proper regmap for accessing regulator passed by id.
 */
static struct regmap *max14577_get_regmap(struct max14577 *max14577,
		int reg_id)
{
	switch (max14577->dev_type) {
	case MAXIM_DEVICE_TYPE_MAX77836:
		switch (reg_id) {
		case MAX77836_SAFEOUT ... MAX77836_CHARGER:
			return max14577->regmap;
		default:
			/* MAX77836_LDO1 ... MAX77836_LDO2 */
			return max14577->regmap_pmic;
		}

	case MAXIM_DEVICE_TYPE_MAX14577:
	default:
		return max14577->regmap;
	}
}

static int max14577_regulator_probe(struct platform_device *pdev)
{
	struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
	struct max14577_platform_data *pdata = dev_get_platdata(max14577->dev);
	int i, ret = 0;
	struct regulator_config config = {};
	const struct regulator_desc *supported_regulators;
	unsigned int supported_regulators_size;
	enum maxim_device_type dev_type = max14577->dev_type;

	switch (dev_type) {
	case MAXIM_DEVICE_TYPE_MAX77836:
		supported_regulators = max77836_supported_regulators;
		supported_regulators_size = ARRAY_SIZE(max77836_supported_regulators);
		break;
	case MAXIM_DEVICE_TYPE_MAX14577:
	default:
		supported_regulators = max14577_supported_regulators;
		supported_regulators_size = ARRAY_SIZE(max14577_supported_regulators);
	}

	config.dev = max14577->dev;
	config.driver_data = max14577;

	for (i = 0; i < supported_regulators_size; i++) {
		struct regulator_dev *regulator;
		/*
		 * Index of supported_regulators[] is also the id and must
		 * match index of pdata->regulators[].
		 */
		if (pdata && pdata->regulators) {
			config.init_data = pdata->regulators[i].initdata;
			config.of_node = pdata->regulators[i].of_node;
		} else {
			config.init_data = match_init_data(i, dev_type);
			config.of_node = match_of_node(i, dev_type);
		}
		config.regmap = max14577_get_regmap(max14577,
				supported_regulators[i].id);

		regulator = devm_regulator_register(&pdev->dev,
				&supported_regulators[i], &config);
		if (IS_ERR(regulator)) {
			ret = PTR_ERR(regulator);
			dev_err(&pdev->dev,
					"Regulator init failed for %d/%s with error: %d\n",
					i, supported_regulators[i].name, ret);
			return ret;
		}
	}

	return ret;
}

static const struct platform_device_id max14577_regulator_id[] = {
	{ "max14577-regulator", MAXIM_DEVICE_TYPE_MAX14577, },
	{ "max77836-regulator", MAXIM_DEVICE_TYPE_MAX77836, },
	{ }
};
MODULE_DEVICE_TABLE(platform, max14577_regulator_id);

static struct platform_driver max14577_regulator_driver = {
	.driver = {
		   .name = "max14577-regulator",
		   },
	.probe		= max14577_regulator_probe,
	.id_table	= max14577_regulator_id,
};

static int __init max14577_regulator_init(void)
{
	BUILD_BUG_ON(ARRAY_SIZE(max14577_supported_regulators) != MAX14577_REGULATOR_NUM);
	BUILD_BUG_ON(ARRAY_SIZE(max77836_supported_regulators) != MAX77836_REGULATOR_NUM);

	BUILD_BUG_ON(MAX77836_REGULATOR_LDO_VOLTAGE_MIN +
			(MAX77836_REGULATOR_LDO_VOLTAGE_STEP *
			  (MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM - 1)) !=
			MAX77836_REGULATOR_LDO_VOLTAGE_MAX);

	return platform_driver_register(&max14577_regulator_driver);
}
subsys_initcall(max14577_regulator_init);

static void __exit max14577_regulator_exit(void)
{
	platform_driver_unregister(&max14577_regulator_driver);
}
module_exit(max14577_regulator_exit);

MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
MODULE_DESCRIPTION("Maxim 14577/77836 regulator driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:max14577-regulator");
Commit	Line	Data
b0902bbe	1	/*
8a82b408	2	* max14577.c - Regulator driver for the Maxim 14577/77836
b0902bbe	3	*
4d047d6c	4	* Copyright (C) 2013,2014 Samsung Electronics
cea8aa3a	5	* Krzysztof Kozlowski <krzk@kernel.org>
b0902bbe KK	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 as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*/
	17
	18	#include <linux/module.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/regulator/driver.h>
	21	#include <linux/mfd/max14577.h>
	22	#include <linux/mfd/max14577-private.h>
	23	#include <linux/regulator/of_regulator.h>
	24
b0902bbe KK	25	static int max14577_reg_is_enabled(struct regulator_dev *rdev)
	26	{
	27	int rid = rdev_get_id(rdev);
	28	struct regmap *rmap = rdev->regmap;
	29	u8 reg_data;
	30
	31	switch (rid) {
	32	case MAX14577_CHARGER:
	33	max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, &reg_data);
	34	if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0)
	35	return 0;
	36	max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
	37	if ((reg_data & STATUS3_CGMBC_MASK) == 0)
	38	return 0;
	39	/* MBCHOSTEN and CGMBC are on */
	40	return 1;
	41	default:
	42	return -EINVAL;
	43	}
	44	}
	45
	46	static int max14577_reg_get_current_limit(struct regulator_dev *rdev)
	47	{
	48	u8 reg_data;
	49	struct regmap *rmap = rdev->regmap;
8a82b408 KK	50	struct max14577 *max14577 = rdev_get_drvdata(rdev);
	51	const struct maxim_charger_current *limits =
	52	&maxim_charger_currents[max14577->dev_type];
b0902bbe KK	53
	54	if (rdev_get_id(rdev) != MAX14577_CHARGER)
	55	return -EINVAL;
	56
	57	max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL4, &reg_data);
	58
	59	if ((reg_data & CHGCTRL4_MBCICHWRCL_MASK) == 0)
8a82b408	60	return limits->min;
b0902bbe KK	61
	62	reg_data = ((reg_data & CHGCTRL4_MBCICHWRCH_MASK) >>
	63	CHGCTRL4_MBCICHWRCH_SHIFT);
8a82b408	64	return limits->high_start + reg_data * limits->high_step;
b0902bbe KK	65	}
	66
	67	static int max14577_reg_set_current_limit(struct regulator_dev *rdev,
	68	int min_uA, int max_uA)
	69	{
b0902bbe	70	u8 reg_data;
b8f139f6	71	int ret;
8a82b408 KK	72	struct max14577 *max14577 = rdev_get_drvdata(rdev);
	73	const struct maxim_charger_current *limits =
	74	&maxim_charger_currents[max14577->dev_type];
b0902bbe KK	75
	76	if (rdev_get_id(rdev) != MAX14577_CHARGER)
	77	return -EINVAL;
	78
b8f139f6 KK	79	ret = maxim_charger_calc_reg_current(limits, min_uA, max_uA, &reg_data);
	80	if (ret)
	81	return ret;
b0902bbe KK	82
	83	return max14577_update_reg(rdev->regmap, MAX14577_CHG_REG_CHG_CTRL4,
	84	CHGCTRL4_MBCICHWRCL_MASK \| CHGCTRL4_MBCICHWRCH_MASK,
	85	reg_data);
	86	}
	87
	88	static struct regulator_ops max14577_safeout_ops = {
	89	.is_enabled = regulator_is_enabled_regmap,
	90	.enable = regulator_enable_regmap,
	91	.disable = regulator_disable_regmap,
	92	.list_voltage = regulator_list_voltage_linear,
	93	};
	94
	95	static struct regulator_ops max14577_charger_ops = {
	96	.is_enabled = max14577_reg_is_enabled,
	97	.enable = regulator_enable_regmap,
	98	.disable = regulator_disable_regmap,
	99	.get_current_limit = max14577_reg_get_current_limit,
	100	.set_current_limit = max14577_reg_set_current_limit,
	101	};
	102
cab344d3 KK	103	#define MAX14577_SAFEOUT_REG { \
	104	.name = "SAFEOUT", \
	105	.of_match = of_match_ptr("SAFEOUT"), \
	106	.regulators_node = of_match_ptr("regulators"), \
	107	.id = MAX14577_SAFEOUT, \
	108	.ops = &max14577_safeout_ops, \
	109	.type = REGULATOR_VOLTAGE, \
	110	.owner = THIS_MODULE, \
	111	.n_voltages = 1, \
	112	.min_uV = MAX14577_REGULATOR_SAFEOUT_VOLTAGE, \
	113	.enable_reg = MAX14577_REG_CONTROL2, \
	114	.enable_mask = CTRL2_SFOUTORD_MASK, \
	115	}
	116	#define MAX14577_CHARGER_REG { \
	117	.name = "CHARGER", \
	118	.of_match = of_match_ptr("CHARGER"), \
	119	.regulators_node = of_match_ptr("regulators"), \
	120	.id = MAX14577_CHARGER, \
	121	.ops = &max14577_charger_ops, \
	122	.type = REGULATOR_CURRENT, \
	123	.owner = THIS_MODULE, \
	124	.enable_reg = MAX14577_CHG_REG_CHG_CTRL2, \
	125	.enable_mask = CHGCTRL2_MBCHOSTEN_MASK, \
	126	}
	127
8a82b408	128	static const struct regulator_desc max14577_supported_regulators[] = {
cab344d3 KK	129	[MAX14577_SAFEOUT] = MAX14577_SAFEOUT_REG,
cab344d3 KK	130	[MAX14577_CHARGER] = MAX14577_CHARGER_REG,
b0902bbe KK	131	};
b0902bbe KK	132
8a82b408 KK	133	static struct regulator_ops max77836_ldo_ops = {
	134	.is_enabled = regulator_is_enabled_regmap,
	135	.enable = regulator_enable_regmap,
	136	.disable = regulator_disable_regmap,
	137	.list_voltage = regulator_list_voltage_linear,
	138	.map_voltage = regulator_map_voltage_linear,
	139	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	140	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	141	/* TODO: add .set_suspend_mode */
	142	};
	143
cab344d3 KK	144	#define MAX77836_LDO_REG(num) { \
	145	.name = "LDO" # num, \
	146	.of_match = of_match_ptr("LDO" # num), \
	147	.regulators_node = of_match_ptr("regulators"), \
	148	.id = MAX77836_LDO ## num, \
	149	.ops = &max77836_ldo_ops, \
	150	.type = REGULATOR_VOLTAGE, \
	151	.owner = THIS_MODULE, \
	152	.n_voltages = MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM, \
	153	.min_uV = MAX77836_REGULATOR_LDO_VOLTAGE_MIN, \
	154	.uV_step = MAX77836_REGULATOR_LDO_VOLTAGE_STEP, \
	155	.enable_reg = MAX77836_LDO_REG_CNFG1_LDO ## num, \
	156	.enable_mask = MAX77836_CNFG1_LDO_PWRMD_MASK, \
	157	.vsel_reg = MAX77836_LDO_REG_CNFG1_LDO ## num, \
	158	.vsel_mask = MAX77836_CNFG1_LDO_TV_MASK, \
	159	}
	160
8a82b408	161	static const struct regulator_desc max77836_supported_regulators[] = {
cab344d3 KK	162	[MAX14577_SAFEOUT] = MAX14577_SAFEOUT_REG,
	163	[MAX14577_CHARGER] = MAX14577_CHARGER_REG,
	164	[MAX77836_LDO1] = MAX77836_LDO_REG(1),
	165	[MAX77836_LDO2] = MAX77836_LDO_REG(2),
8a82b408 KK	166	};
8a82b408 KK	167
b0902bbe KK	168	#ifdef CONFIG_OF
	169	static struct of_regulator_match max14577_regulator_matches[] = {
	170	{ .name = "SAFEOUT", },
	171	{ .name = "CHARGER", },
	172	};
	173
8a82b408 KK	174	static struct of_regulator_match max77836_regulator_matches[] = {
	175	{ .name = "SAFEOUT", },
	176	{ .name = "CHARGER", },
	177	{ .name = "LDO1", },
	178	{ .name = "LDO2", },
	179	};
	180
8a82b408 KK	181	static inline struct regulator_init_data *match_init_data(int index,
8a82b408 KK	182	enum maxim_device_type dev_type)
b0902bbe	183	{
8a82b408 KK	184	switch (dev_type) {
	185	case MAXIM_DEVICE_TYPE_MAX77836:
	186	return max77836_regulator_matches[index].init_data;
	187
	188	case MAXIM_DEVICE_TYPE_MAX14577:
	189	default:
	190	return max14577_regulator_matches[index].init_data;
	191	}
b0902bbe KK	192	}
b0902bbe KK	193
8a82b408 KK	194	static inline struct device_node *match_of_node(int index,
8a82b408 KK	195	enum maxim_device_type dev_type)
b0902bbe	196	{
8a82b408 KK	197	switch (dev_type) {
	198	case MAXIM_DEVICE_TYPE_MAX77836:
	199	return max77836_regulator_matches[index].of_node;
	200
	201	case MAXIM_DEVICE_TYPE_MAX14577:
	202	default:
	203	return max14577_regulator_matches[index].of_node;
	204	}
b0902bbe KK	205	}
b0902bbe KK	206	#else /* CONFIG_OF */
8a82b408 KK	207	static inline struct regulator_init_data *match_init_data(int index,
8a82b408 KK	208	enum maxim_device_type dev_type)
b0902bbe KK	209	{
	210	return NULL;
	211	}
	212
8a82b408 KK	213	static inline struct device_node *match_of_node(int index,
8a82b408 KK	214	enum maxim_device_type dev_type)
b0902bbe KK	215	{
	216	return NULL;
	217	}
	218	#endif /* CONFIG_OF */
	219
8a82b408 KK	220	/**
	221	* Registers for regulators of max77836 use different I2C slave addresses so
	222	* different regmaps must be used for them.
	223	*
	224	* Returns proper regmap for accessing regulator passed by id.
	225	*/
	226	static struct regmap max14577_get_regmap(struct max14577 max14577,
	227	int reg_id)
	228	{
	229	switch (max14577->dev_type) {
	230	case MAXIM_DEVICE_TYPE_MAX77836:
	231	switch (reg_id) {
	232	case MAX77836_SAFEOUT ... MAX77836_CHARGER:
	233	return max14577->regmap;
	234	default:
	235	/* MAX77836_LDO1 ... MAX77836_LDO2 */
	236	return max14577->regmap_pmic;
	237	}
	238
	239	case MAXIM_DEVICE_TYPE_MAX14577:
	240	default:
	241	return max14577->regmap;
	242	}
	243	}
b0902bbe KK	244
	245	static int max14577_regulator_probe(struct platform_device *pdev)
	246	{
	247	struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
	248	struct max14577_platform_data *pdata = dev_get_platdata(max14577->dev);
e951ceef	249	int i, ret = 0;
b0902bbe	250	struct regulator_config config = {};
8a82b408 KK	251	const struct regulator_desc *supported_regulators;
	252	unsigned int supported_regulators_size;
	253	enum maxim_device_type dev_type = max14577->dev_type;
b0902bbe	254
8a82b408 KK	255	switch (dev_type) {
	256	case MAXIM_DEVICE_TYPE_MAX77836:
	257	supported_regulators = max77836_supported_regulators;
	258	supported_regulators_size = ARRAY_SIZE(max77836_supported_regulators);
	259	break;
	260	case MAXIM_DEVICE_TYPE_MAX14577:
	261	default:
	262	supported_regulators = max14577_supported_regulators;
	263	supported_regulators_size = ARRAY_SIZE(max14577_supported_regulators);
	264	}
	265
e951ceef	266	config.dev = max14577->dev;
8a82b408	267	config.driver_data = max14577;
b0902bbe	268
8a82b408	269	for (i = 0; i < supported_regulators_size; i++) {
b0902bbe KK	270	struct regulator_dev *regulator;
	271	/*
	272	* Index of supported_regulators[] is also the id and must
	273	* match index of pdata->regulators[].
	274	*/
	275	if (pdata && pdata->regulators) {
	276	config.init_data = pdata->regulators[i].initdata;
	277	config.of_node = pdata->regulators[i].of_node;
	278	} else {
8a82b408 KK	279	config.init_data = match_init_data(i, dev_type);
8a82b408 KK	280	config.of_node = match_of_node(i, dev_type);
b0902bbe	281	}
8a82b408 KK	282	config.regmap = max14577_get_regmap(max14577,
8a82b408 KK	283	supported_regulators[i].id);
b0902bbe KK	284
	285	regulator = devm_regulator_register(&pdev->dev,
	286	&supported_regulators[i], &config);
	287	if (IS_ERR(regulator)) {
	288	ret = PTR_ERR(regulator);
	289	dev_err(&pdev->dev,
8a82b408 KK	290	"Regulator init failed for %d/%s with error: %d\n",
8a82b408 KK	291	i, supported_regulators[i].name, ret);
b0902bbe KK	292	return ret;
	293	}
	294	}
	295
	296	return ret;
	297	}
	298
8a82b408 KK	299	static const struct platform_device_id max14577_regulator_id[] = {
	300	{ "max14577-regulator", MAXIM_DEVICE_TYPE_MAX14577, },
	301	{ "max77836-regulator", MAXIM_DEVICE_TYPE_MAX77836, },
	302	{ }
	303	};
	304	MODULE_DEVICE_TABLE(platform, max14577_regulator_id);
	305
b0902bbe KK	306	static struct platform_driver max14577_regulator_driver = {
b0902bbe KK	307	.driver = {
b0902bbe KK	308	.name = "max14577-regulator",
b0902bbe KK	309	},
8a82b408 KK	310	.probe = max14577_regulator_probe,
8a82b408 KK	311	.id_table = max14577_regulator_id,
b0902bbe KK	312	};
	313
	314	static int __init max14577_regulator_init(void)
	315	{
8a82b408 KK	316	BUILD_BUG_ON(ARRAY_SIZE(max14577_supported_regulators) != MAX14577_REGULATOR_NUM);
	317	BUILD_BUG_ON(ARRAY_SIZE(max77836_supported_regulators) != MAX77836_REGULATOR_NUM);
	318
	319	BUILD_BUG_ON(MAX77836_REGULATOR_LDO_VOLTAGE_MIN +
	320	(MAX77836_REGULATOR_LDO_VOLTAGE_STEP *
	321	(MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM - 1)) !=
	322	MAX77836_REGULATOR_LDO_VOLTAGE_MAX);
b0902bbe KK	323
	324	return platform_driver_register(&max14577_regulator_driver);
	325	}
	326	subsys_initcall(max14577_regulator_init);
	327
	328	static void __exit max14577_regulator_exit(void)
	329	{
	330	platform_driver_unregister(&max14577_regulator_driver);
	331	}
	332	module_exit(max14577_regulator_exit);
	333
cea8aa3a	334	MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
8a82b408	335	MODULE_DESCRIPTION("Maxim 14577/77836 regulator driver");
b0902bbe	336	MODULE_LICENSE("GPL");
9f45a3dd	337	MODULE_ALIAS("platform:max14577-regulator");