[deliverable/linux.git] / drivers / regulator / max8907-regulator.c

/*
 * max8907-regulator.c -- support regulators in max8907
 *
 * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
 * Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved.
 *
 * Portions based on drivers/regulator/tps65910-regulator.c,
 *     Copyright 2010 Texas Instruments Inc.
 *     Author: Graeme Gregory <gg@slimlogic.co.uk>
 *     Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/err.h>
#include <linux/init.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max8907.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regmap.h>
#include <linux/slab.h>

#define MAX8907_II2RR_VERSION_MASK	0xF0
#define MAX8907_II2RR_VERSION_REV_A	0x00
#define MAX8907_II2RR_VERSION_REV_B	0x10
#define MAX8907_II2RR_VERSION_REV_C	0x30

struct max8907_regulator {
	struct regulator_desc desc[MAX8907_NUM_REGULATORS];
	struct regulator_dev *rdev[MAX8907_NUM_REGULATORS];
};

#define REG_MBATT() \
	[MAX8907_MBATT] = { \
		.name = "MBATT", \
		.supply_name = "mbatt", \
		.id = MAX8907_MBATT, \
		.ops = &max8907_mbatt_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
	}

#define REG_LDO(ids, supply, base, min, max, step) \
	[MAX8907_##ids] = { \
		.name = #ids, \
		.supply_name = supply, \
		.id = MAX8907_##ids, \
		.n_voltages = ((max) - (min)) / (step) + 1, \
		.ops = &max8907_ldo_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		.min_uV = (min), \
		.uV_step = (step), \
		.vsel_reg = (base) + MAX8907_VOUT, \
		.vsel_mask = 0x3f, \
		.enable_reg = (base) + MAX8907_CTL, \
		.enable_mask = MAX8907_MASK_LDO_EN, \
	}

#define REG_FIXED(ids, supply, voltage) \
	[MAX8907_##ids] = { \
		.name = #ids, \
		.supply_name = supply, \
		.id = MAX8907_##ids, \
		.n_voltages = 1, \
		.ops = &max8907_fixed_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		.min_uV = (voltage), \
	}

#define REG_OUT5V(ids, supply, base, voltage) \
	[MAX8907_##ids] = { \
		.name = #ids, \
		.supply_name = supply, \
		.id = MAX8907_##ids, \
		.n_voltages = 1, \
		.ops = &max8907_out5v_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		.min_uV = (voltage), \
		.enable_reg = (base), \
		.enable_mask = MAX8907_MASK_OUT5V_EN, \
	}

#define REG_BBAT(ids, supply, base, min, max, step) \
	[MAX8907_##ids] = { \
		.name = #ids, \
		.supply_name = supply, \
		.id = MAX8907_##ids, \
		.n_voltages = ((max) - (min)) / (step) + 1, \
		.ops = &max8907_bbat_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		.min_uV = (min), \
		.uV_step = (step), \
		.vsel_reg = (base), \
		.vsel_mask = MAX8907_MASK_VBBATTCV, \
	}

#define LDO_750_50(id, supply, base) REG_LDO(id, supply, (base), \
			750000, 3900000, 50000)
#define LDO_650_25(id, supply, base) REG_LDO(id, supply, (base), \
			650000, 2225000, 25000)

static struct regulator_ops max8907_mbatt_ops = {
};

static struct regulator_ops max8907_ldo_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
};

static struct regulator_ops max8907_ldo_hwctl_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
};

static struct regulator_ops max8907_fixed_ops = {
	.list_voltage = regulator_list_voltage_linear,
};

static struct regulator_ops max8907_out5v_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
};

static struct regulator_ops max8907_out5v_hwctl_ops = {
	.list_voltage = regulator_list_voltage_linear,
};

static struct regulator_ops max8907_bbat_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
};

static struct regulator_desc max8907_regulators[] = {
	REG_MBATT(),
	REG_LDO(SD1, "in-v1", MAX8907_REG_SDCTL1, 650000, 2225000, 25000),
	REG_LDO(SD2, "in-v2", MAX8907_REG_SDCTL2, 637500, 1425000, 12500),
	REG_LDO(SD3, "in-v3", MAX8907_REG_SDCTL3, 750000, 3900000, 50000),
	LDO_750_50(LDO1, "in1", MAX8907_REG_LDOCTL1),
	LDO_650_25(LDO2, "in2", MAX8907_REG_LDOCTL2),
	LDO_650_25(LDO3, "in3", MAX8907_REG_LDOCTL3),
	LDO_750_50(LDO4, "in4", MAX8907_REG_LDOCTL4),
	LDO_750_50(LDO5, "in5", MAX8907_REG_LDOCTL5),
	LDO_750_50(LDO6, "in6", MAX8907_REG_LDOCTL6),
	LDO_750_50(LDO7, "in7", MAX8907_REG_LDOCTL7),
	LDO_750_50(LDO8, "in8", MAX8907_REG_LDOCTL8),
	LDO_750_50(LDO9, "in9", MAX8907_REG_LDOCTL9),
	LDO_750_50(LDO10, "in10", MAX8907_REG_LDOCTL10),
	LDO_750_50(LDO11, "in11", MAX8907_REG_LDOCTL11),
	LDO_750_50(LDO12, "in12", MAX8907_REG_LDOCTL12),
	LDO_750_50(LDO13, "in13", MAX8907_REG_LDOCTL13),
	LDO_750_50(LDO14, "in14", MAX8907_REG_LDOCTL14),
	LDO_750_50(LDO15, "in15", MAX8907_REG_LDOCTL15),
	LDO_750_50(LDO16, "in16", MAX8907_REG_LDOCTL16),
	LDO_650_25(LDO17, "in17", MAX8907_REG_LDOCTL17),
	LDO_650_25(LDO18, "in18", MAX8907_REG_LDOCTL18),
	LDO_750_50(LDO19, "in19", MAX8907_REG_LDOCTL19),
	LDO_750_50(LDO20, "in20", MAX8907_REG_LDOCTL20),
	REG_OUT5V(OUT5V, "mbatt", MAX8907_REG_OUT5VEN, 5000000),
	REG_OUT5V(OUT33V, "mbatt",  MAX8907_REG_OUT33VEN, 3300000),
	REG_BBAT(BBAT, "MBATT", MAX8907_REG_BBAT_CNFG,
						2400000, 3000000, 200000),
	REG_FIXED(SDBY, "MBATT", 1200000),
	REG_FIXED(VRTC, "MBATT", 3300000),
};

#ifdef CONFIG_OF

#define MATCH(_name, _id) \
	[MAX8907_##_id] = { \
		.name = #_name, \
		.driver_data = (void *)&max8907_regulators[MAX8907_##_id], \
	}

static struct of_regulator_match max8907_matches[] = {
	MATCH(mbatt, MBATT),
	MATCH(sd1, SD1),
	MATCH(sd2, SD2),
	MATCH(sd3, SD3),
	MATCH(ldo1, LDO1),
	MATCH(ldo2, LDO2),
	MATCH(ldo3, LDO3),
	MATCH(ldo4, LDO4),
	MATCH(ldo5, LDO5),
	MATCH(ldo6, LDO6),
	MATCH(ldo7, LDO7),
	MATCH(ldo8, LDO8),
	MATCH(ldo9, LDO9),
	MATCH(ldo10, LDO10),
	MATCH(ldo11, LDO11),
	MATCH(ldo12, LDO12),
	MATCH(ldo13, LDO13),
	MATCH(ldo14, LDO14),
	MATCH(ldo15, LDO15),
	MATCH(ldo16, LDO16),
	MATCH(ldo17, LDO17),
	MATCH(ldo18, LDO18),
	MATCH(ldo19, LDO19),
	MATCH(ldo20, LDO20),
	MATCH(out5v, OUT5V),
	MATCH(out33v, OUT33V),
	MATCH(bbat, BBAT),
	MATCH(sdby, SDBY),
	MATCH(vrtc, VRTC),
};

static int max8907_regulator_parse_dt(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.parent->of_node;
	struct device_node *regulators;
	int ret;

	if (!pdev->dev.parent->of_node)
		return 0;

	regulators = of_find_node_by_name(np, "regulators");
	if (!regulators) {
		dev_err(&pdev->dev, "regulators node not found\n");
		return -EINVAL;
	}

	ret = of_regulator_match(pdev->dev.parent, regulators,
				 max8907_matches,
				 ARRAY_SIZE(max8907_matches));
	if (ret < 0) {
		dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
			ret);
		return ret;
	}

	return 0;
}
#else
static int max8907_regulator_parse_dt(struct platform_device *pdev)
{
	return 0;
}
#endif

static __devinit int max8907_regulator_probe(struct platform_device *pdev)
{
	struct max8907 *max8907 = dev_get_drvdata(pdev->dev.parent);
	struct max8907_platform_data *pdata = dev_get_platdata(max8907->dev);
	int ret;
	struct max8907_regulator *pmic;
	unsigned int val;
	int i;
	struct regulator_config config = {};
	struct regulator_init_data *idata;
	const char *mbatt_rail_name = NULL;

	ret = max8907_regulator_parse_dt(pdev);
	if (ret)
		return ret;

	pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
	if (!pmic) {
		dev_err(&pdev->dev, "Failed to alloc pmic\n");
		return -ENOMEM;
	}
	platform_set_drvdata(pdev, pmic);

	memcpy(pmic->desc, max8907_regulators, sizeof(pmic->desc));

	/* Backwards compatibility with MAX8907B; SD1 uses different voltages */
	regmap_read(max8907->regmap_gen, MAX8907_REG_II2RR, &val);
	if ((val & MAX8907_II2RR_VERSION_MASK) ==
	    MAX8907_II2RR_VERSION_REV_B) {
		pmic->desc[MAX8907_SD1].min_uV = 637500;
		pmic->desc[MAX8907_SD1].uV_step = 12500;
		pmic->desc[MAX8907_SD1].n_voltages = (1425000 - 637500) / 12500;
	}

	for (i = 0; i < MAX8907_NUM_REGULATORS; i++) {
		config.dev = pdev->dev.parent;
		if (pdata)
			idata = pdata->init_data[i];
		else
			idata = max8907_matches[i].init_data;
		config.init_data = idata;
		config.driver_data = pmic;
		config.regmap = max8907->regmap_gen;
		config.of_node = max8907_matches[i].of_node;

		switch (pmic->desc[i].id) {
		case MAX8907_MBATT:
			mbatt_rail_name = idata->constraints.name;
			break;
		case MAX8907_BBAT:
		case MAX8907_SDBY:
		case MAX8907_VRTC:
			idata->supply_regulator = mbatt_rail_name;
			break;
		}

		if (pmic->desc[i].ops == &max8907_ldo_ops) {
			regmap_read(config.regmap, pmic->desc[i].enable_reg,
				    &val);
			if ((val & MAX8907_MASK_LDO_SEQ) !=
			    MAX8907_MASK_LDO_SEQ)
				pmic->desc[i].ops = &max8907_ldo_hwctl_ops;
		} else if (pmic->desc[i].ops == &max8907_out5v_ops) {
			regmap_read(config.regmap, pmic->desc[i].enable_reg,
				    &val);
			if ((val & (MAX8907_MASK_OUT5V_VINEN |
						MAX8907_MASK_OUT5V_ENSRC)) !=
			    MAX8907_MASK_OUT5V_ENSRC)
				pmic->desc[i].ops = &max8907_out5v_hwctl_ops;
		}

		pmic->rdev[i] = regulator_register(&pmic->desc[i], &config);
		if (IS_ERR(pmic->rdev[i])) {
			dev_err(&pdev->dev,
				"failed to register %s regulator\n",
				pmic->desc[i].name);
			ret = PTR_ERR(pmic->rdev[i]);
			goto err_unregister_regulator;
		}
	}

	return 0;

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

static __devexit int max8907_regulator_remove(struct platform_device *pdev)
{
	struct max8907_regulator *pmic;
	int i;

	for (i = 0; i < MAX8907_NUM_REGULATORS; i++)
		regulator_unregister(pmic->rdev[i]);

	return 0;
}

static struct platform_driver max8907_regulator_driver = {
	.driver = {
		   .name = "max8907-regulator",
		   .owner = THIS_MODULE,
		   },
	.probe = max8907_regulator_probe,
	.remove = __devexit_p(max8907_regulator_remove),
};

static int __init max8907_regulator_init(void)
{
	return platform_driver_register(&max8907_regulator_driver);
}

subsys_initcall(max8907_regulator_init);

static void __exit max8907_reg_exit(void)
{
	platform_driver_unregister(&max8907_regulator_driver);
}

module_exit(max8907_reg_exit);

MODULE_DESCRIPTION("MAX8907 regulator driver");
MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
ffee1909 GY	1	/*
	2	* max8907-regulator.c -- support regulators in max8907
	3	*
	4	* Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
	5	* Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved.
	6	*
	7	* Portions based on drivers/regulator/tps65910-regulator.c,
	8	* Copyright 2010 Texas Instruments Inc.
	9	* Author: Graeme Gregory <gg@slimlogic.co.uk>
	10	* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License version 2 as
	14	* published by the Free Software Foundation.
	15	*/
	16
	17	#include <linux/err.h>
	18	#include <linux/init.h>
	19	#include <linux/mfd/core.h>
	20	#include <linux/mfd/max8907.h>
	21	#include <linux/module.h>
	22	#include <linux/of.h>
	23	#include <linux/platform_device.h>
	24	#include <linux/regulator/driver.h>
	25	#include <linux/regulator/machine.h>
	26	#include <linux/regulator/of_regulator.h>
	27	#include <linux/regmap.h>
	28	#include <linux/slab.h>
	29
	30	#define MAX8907_II2RR_VERSION_MASK 0xF0
	31	#define MAX8907_II2RR_VERSION_REV_A 0x00
	32	#define MAX8907_II2RR_VERSION_REV_B 0x10
	33	#define MAX8907_II2RR_VERSION_REV_C 0x30
	34
	35	struct max8907_regulator {
	36	struct regulator_desc desc[MAX8907_NUM_REGULATORS];
	37	struct regulator_dev *rdev[MAX8907_NUM_REGULATORS];
	38	};
	39
	40	#define REG_MBATT() \
	41	[MAX8907_MBATT] = { \
	42	.name = "MBATT", \
	43	.supply_name = "mbatt", \
	44	.id = MAX8907_MBATT, \
	45	.ops = &max8907_mbatt_ops, \
	46	.type = REGULATOR_VOLTAGE, \
	47	.owner = THIS_MODULE, \
	48	}
	49
	50	#define REG_LDO(ids, supply, base, min, max, step) \
	51	[MAX8907_##ids] = { \
	52	.name = #ids, \
	53	.supply_name = supply, \
	54	.id = MAX8907_##ids, \
	55	.n_voltages = ((max) - (min)) / (step) + 1, \
	56	.ops = &max8907_ldo_ops, \
	57	.type = REGULATOR_VOLTAGE, \
	58	.owner = THIS_MODULE, \
	59	.min_uV = (min), \
	60	.uV_step = (step), \
	61	.vsel_reg = (base) + MAX8907_VOUT, \
	62	.vsel_mask = 0x3f, \
	63	.enable_reg = (base) + MAX8907_CTL, \
	64	.enable_mask = MAX8907_MASK_LDO_EN, \
65	}
66
67	#define REG_FIXED(ids, supply, voltage) \
68	[MAX8907_##ids] = { \
69	.name = #ids, \
70	.supply_name = supply, \
71	.id = MAX8907_##ids, \
72	.n_voltages = 1, \
73	.ops = &max8907_fixed_ops, \
74	.type = REGULATOR_VOLTAGE, \
75	.owner = THIS_MODULE, \
76	.min_uV = (voltage), \
77	}
78
79	#define REG_OUT5V(ids, supply, base, voltage) \
80	[MAX8907_##ids] = { \
81	.name = #ids, \
82	.supply_name = supply, \
83	.id = MAX8907_##ids, \
84	.n_voltages = 1, \
85	.ops = &max8907_out5v_ops, \
86	.type = REGULATOR_VOLTAGE, \
87	.owner = THIS_MODULE, \
88	.min_uV = (voltage), \
89	.enable_reg = (base), \
90	.enable_mask = MAX8907_MASK_OUT5V_EN, \
91	}
92
93	#define REG_BBAT(ids, supply, base, min, max, step) \
94	[MAX8907_##ids] = { \
95	.name = #ids, \
96	.supply_name = supply, \
97	.id = MAX8907_##ids, \
98	.n_voltages = ((max) - (min)) / (step) + 1, \
99	.ops = &max8907_bbat_ops, \
100	.type = REGULATOR_VOLTAGE, \
101	.owner = THIS_MODULE, \
102	.min_uV = (min), \
103	.uV_step = (step), \
104	.vsel_reg = (base), \
105	.vsel_mask = MAX8907_MASK_VBBATTCV, \
106	}
107
108	#define LDO_750_50(id, supply, base) REG_LDO(id, supply, (base), \
109	750000, 3900000, 50000)
110	#define LDO_650_25(id, supply, base) REG_LDO(id, supply, (base), \
111	650000, 2225000, 25000)
112
113	static struct regulator_ops max8907_mbatt_ops = {
114	};
115
116	static struct regulator_ops max8907_ldo_ops = {
117	.list_voltage = regulator_list_voltage_linear,
118	.set_voltage_sel = regulator_set_voltage_sel_regmap,
119	.get_voltage_sel = regulator_get_voltage_sel_regmap,
120	.enable = regulator_enable_regmap,
121	.disable = regulator_disable_regmap,
122	.is_enabled = regulator_is_enabled_regmap,
123	};
124
125	static struct regulator_ops max8907_ldo_hwctl_ops = {
126	.list_voltage = regulator_list_voltage_linear,
127	.set_voltage_sel = regulator_set_voltage_sel_regmap,
128	.get_voltage_sel = regulator_get_voltage_sel_regmap,
129	};
130
131	static struct regulator_ops max8907_fixed_ops = {
132	.list_voltage = regulator_list_voltage_linear,
133	};
134
135	static struct regulator_ops max8907_out5v_ops = {
136	.list_voltage = regulator_list_voltage_linear,
137	.enable = regulator_enable_regmap,
138	.disable = regulator_disable_regmap,
139	.is_enabled = regulator_is_enabled_regmap,
140	};
141
142	static struct regulator_ops max8907_out5v_hwctl_ops = {
143	.list_voltage = regulator_list_voltage_linear,
144	};
145
146	static struct regulator_ops max8907_bbat_ops = {
147	.list_voltage = regulator_list_voltage_linear,
148	.set_voltage_sel = regulator_set_voltage_sel_regmap,
149	.get_voltage_sel = regulator_get_voltage_sel_regmap,
150	};
151
152	static struct regulator_desc max8907_regulators[] = {
153	REG_MBATT(),
154	REG_LDO(SD1, "in-v1", MAX8907_REG_SDCTL1, 650000, 2225000, 25000),
155	REG_LDO(SD2, "in-v2", MAX8907_REG_SDCTL2, 637500, 1425000, 12500),
156	REG_LDO(SD3, "in-v3", MAX8907_REG_SDCTL3, 750000, 3900000, 50000),
157	LDO_750_50(LDO1, "in1", MAX8907_REG_LDOCTL1),
158	LDO_650_25(LDO2, "in2", MAX8907_REG_LDOCTL2),
159	LDO_650_25(LDO3, "in3", MAX8907_REG_LDOCTL3),
160	LDO_750_50(LDO4, "in4", MAX8907_REG_LDOCTL4),
161	LDO_750_50(LDO5, "in5", MAX8907_REG_LDOCTL5),
162	LDO_750_50(LDO6, "in6", MAX8907_REG_LDOCTL6),
163	LDO_750_50(LDO7, "in7", MAX8907_REG_LDOCTL7),
164	LDO_750_50(LDO8, "in8", MAX8907_REG_LDOCTL8),
165	LDO_750_50(LDO9, "in9", MAX8907_REG_LDOCTL9),
166	LDO_750_50(LDO10, "in10", MAX8907_REG_LDOCTL10),
167	LDO_750_50(LDO11, "in11", MAX8907_REG_LDOCTL11),
168	LDO_750_50(LDO12, "in12", MAX8907_REG_LDOCTL12),
169	LDO_750_50(LDO13, "in13", MAX8907_REG_LDOCTL13),
170	LDO_750_50(LDO14, "in14", MAX8907_REG_LDOCTL14),
171	LDO_750_50(LDO15, "in15", MAX8907_REG_LDOCTL15),
172	LDO_750_50(LDO16, "in16", MAX8907_REG_LDOCTL16),
173	LDO_650_25(LDO17, "in17", MAX8907_REG_LDOCTL17),
174	LDO_650_25(LDO18, "in18", MAX8907_REG_LDOCTL18),
175	LDO_750_50(LDO19, "in19", MAX8907_REG_LDOCTL19),
176	LDO_750_50(LDO20, "in20", MAX8907_REG_LDOCTL20),
177	REG_OUT5V(OUT5V, "mbatt", MAX8907_REG_OUT5VEN, 5000000),
178	REG_OUT5V(OUT33V, "mbatt", MAX8907_REG_OUT33VEN, 3300000),
179	REG_BBAT(BBAT, "MBATT", MAX8907_REG_BBAT_CNFG,
180	2400000, 3000000, 200000),
181	REG_FIXED(SDBY, "MBATT", 1200000),
182	REG_FIXED(VRTC, "MBATT", 3300000),
183	};
184
185	#ifdef CONFIG_OF
186
187	#define MATCH(_name, _id) \
188	[MAX8907_##_id] = { \
189	.name = #_name, \
190	.driver_data = (void *)&max8907_regulators[MAX8907_##_id], \
191	}
192
193	static struct of_regulator_match max8907_matches[] = {
194	MATCH(mbatt, MBATT),
195	MATCH(sd1, SD1),
196	MATCH(sd2, SD2),
197	MATCH(sd3, SD3),
198	MATCH(ldo1, LDO1),
199	MATCH(ldo2, LDO2),
200	MATCH(ldo3, LDO3),
201	MATCH(ldo4, LDO4),
202	MATCH(ldo5, LDO5),
203	MATCH(ldo6, LDO6),
204	MATCH(ldo7, LDO7),
205	MATCH(ldo8, LDO8),
206	MATCH(ldo9, LDO9),
207	MATCH(ldo10, LDO10),
208	MATCH(ldo11, LDO11),
209	MATCH(ldo12, LDO12),
210	MATCH(ldo13, LDO13),
211	MATCH(ldo14, LDO14),
212	MATCH(ldo15, LDO15),
213	MATCH(ldo16, LDO16),
214	MATCH(ldo17, LDO17),
215	MATCH(ldo18, LDO18),
216	MATCH(ldo19, LDO19),
217	MATCH(ldo20, LDO20),
218	MATCH(out5v, OUT5V),
219	MATCH(out33v, OUT33V),
220	MATCH(bbat, BBAT),
221	MATCH(sdby, SDBY),
222	MATCH(vrtc, VRTC),
223	};
224
225	static int max8907_regulator_parse_dt(struct platform_device *pdev)
226	{
227	struct device_node *np = pdev->dev.parent->of_node;
228	struct device_node *regulators;
229	int ret;
230
231	if (!pdev->dev.parent->of_node)
232	return 0;
233
234	regulators = of_find_node_by_name(np, "regulators");
235	if (!regulators) {
236	dev_err(&pdev->dev, "regulators node not found\n");
237	return -EINVAL;
238	}
239
240	ret = of_regulator_match(pdev->dev.parent, regulators,
241	max8907_matches,
242	ARRAY_SIZE(max8907_matches));
243	if (ret < 0) {
244	dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
245	ret);
246	return ret;
247	}
248
249	return 0;
250	}
251	#else
252	static int max8907_regulator_parse_dt(struct platform_device *pdev)
253	{
254	return 0;
255	}
256	#endif
257
258	static __devinit int max8907_regulator_probe(struct platform_device *pdev)
259	{
260	struct max8907 *max8907 = dev_get_drvdata(pdev->dev.parent);
261	struct max8907_platform_data *pdata = dev_get_platdata(max8907->dev);
262	int ret;
263	struct max8907_regulator *pmic;
264	unsigned int val;
265	int i;
266	struct regulator_config config = {};
267	struct regulator_init_data *idata;
268	const char *mbatt_rail_name = NULL;
269
270	ret = max8907_regulator_parse_dt(pdev);
271	if (ret)
272	return ret;
273
274	pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
275	if (!pmic) {
276	dev_err(&pdev->dev, "Failed to alloc pmic\n");
277	return -ENOMEM;
278	}
279	platform_set_drvdata(pdev, pmic);
280
281	memcpy(pmic->desc, max8907_regulators, sizeof(pmic->desc));
282
283	/* Backwards compatibility with MAX8907B; SD1 uses different voltages */
284	regmap_read(max8907->regmap_gen, MAX8907_REG_II2RR, &val);
285	if ((val & MAX8907_II2RR_VERSION_MASK) ==
286	MAX8907_II2RR_VERSION_REV_B) {
287	pmic->desc[MAX8907_SD1].min_uV = 637500;
288	pmic->desc[MAX8907_SD1].uV_step = 12500;
289	pmic->desc[MAX8907_SD1].n_voltages = (1425000 - 637500) / 12500;
290	}
291
292	for (i = 0; i < MAX8907_NUM_REGULATORS; i++) {
293	config.dev = pdev->dev.parent;
294	if (pdata)
295	idata = pdata->init_data[i];
296	else
297	idata = max8907_matches[i].init_data;
298	config.init_data = idata;
299	config.driver_data = pmic;
300	config.regmap = max8907->regmap_gen;
301	config.of_node = max8907_matches[i].of_node;
302
303	switch (pmic->desc[i].id) {
304	case MAX8907_MBATT:
305	mbatt_rail_name = idata->constraints.name;
306	break;
307	case MAX8907_BBAT:
308	case MAX8907_SDBY:
309	case MAX8907_VRTC:
310	idata->supply_regulator = mbatt_rail_name;
311	break;
312	}
313
314	if (pmic->desc[i].ops == &max8907_ldo_ops) {
315	regmap_read(config.regmap, pmic->desc[i].enable_reg,
316	&val);
317	if ((val & MAX8907_MASK_LDO_SEQ) !=
318	MAX8907_MASK_LDO_SEQ)
319	pmic->desc[i].ops = &max8907_ldo_hwctl_ops;
320	} else if (pmic->desc[i].ops == &max8907_out5v_ops) {
321	regmap_read(config.regmap, pmic->desc[i].enable_reg,
322	&val);
323	if ((val & (MAX8907_MASK_OUT5V_VINEN \|
324	MAX8907_MASK_OUT5V_ENSRC)) !=
325	MAX8907_MASK_OUT5V_ENSRC)
326	pmic->desc[i].ops = &max8907_out5v_hwctl_ops;
327	}
328
329	pmic->rdev[i] = regulator_register(&pmic->desc[i], &config);
330	if (IS_ERR(pmic->rdev[i])) {
331	dev_err(&pdev->dev,
332	"failed to register %s regulator\n",
333	pmic->desc[i].name);
334	ret = PTR_ERR(pmic->rdev[i]);
335	goto err_unregister_regulator;
336	}
337	}
338
339	return 0;
340
341	err_unregister_regulator:
342	while (--i >= 0)
343	regulator_unregister(pmic->rdev[i]);
344	return ret;
345	}
346
347	static __devexit int max8907_regulator_remove(struct platform_device *pdev)
348	{
349	struct max8907_regulator *pmic;
350	int i;
351
352	for (i = 0; i < MAX8907_NUM_REGULATORS; i++)
353	regulator_unregister(pmic->rdev[i]);
354
355	return 0;
356	}
357
358	static struct platform_driver max8907_regulator_driver = {
359	.driver = {
360	.name = "max8907-regulator",
361	.owner = THIS_MODULE,
362	},
363	.probe = max8907_regulator_probe,
364	.remove = __devexit_p(max8907_regulator_remove),
365	};
366
367	static int __init max8907_regulator_init(void)
368	{
369	return platform_driver_register(&max8907_regulator_driver);
370	}
371
372	subsys_initcall(max8907_regulator_init);
373
374	static void __exit max8907_reg_exit(void)
375	{
376	platform_driver_unregister(&max8907_regulator_driver);
377	}
378
379	module_exit(max8907_reg_exit);
380
381	MODULE_DESCRIPTION("MAX8907 regulator driver");
382	MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>");
383	MODULE_LICENSE("GPL v2");