[mirror_ubuntu-artful-kernel.git] / drivers / regulator / max8925-regulator.c

/*
 * Regulators driver for Maxim max8925
 *
 * Copyright (C) 2009 Marvell International Ltd.
 *      Haojian Zhuang <haojian.zhuang@marvell.com>
 *
 * 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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/max8925.h>
#include <linux/of.h>
#include <linux/regulator/of_regulator.h>

#define SD1_DVM_VMIN		850000
#define SD1_DVM_VMAX		1000000
#define SD1_DVM_STEP		50000
#define SD1_DVM_SHIFT		5		/* SDCTL1 bit5 */
#define SD1_DVM_EN		6		/* SDV1 bit 6 */

/* bit definitions in LDO control registers */
#define LDO_SEQ_I2C		0x7		/* Power U/D by i2c */
#define LDO_SEQ_MASK		0x7		/* Power U/D sequence mask */
#define LDO_SEQ_SHIFT		2		/* Power U/D sequence offset */
#define LDO_I2C_EN		0x1		/* Enable by i2c */
#define LDO_I2C_EN_MASK		0x1		/* Enable mask by i2c */
#define LDO_I2C_EN_SHIFT	0		/* Enable offset by i2c */

struct max8925_regulator_info {
	struct regulator_desc	desc;
	struct i2c_client	*i2c;

	int	vol_reg;
	int	enable_reg;
};

static int max8925_set_voltage_sel(struct regulator_dev *rdev,
				   unsigned int selector)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	unsigned char mask = rdev->desc->n_voltages - 1;

	return max8925_set_bits(info->i2c, info->vol_reg, mask, selector);
}

static int max8925_get_voltage_sel(struct regulator_dev *rdev)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	unsigned char data, mask;
	int ret;

	ret = max8925_reg_read(info->i2c, info->vol_reg);
	if (ret < 0)
		return ret;
	mask = rdev->desc->n_voltages - 1;
	data = ret & mask;

	return data;
}

static int max8925_enable(struct regulator_dev *rdev)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);

	return max8925_set_bits(info->i2c, info->enable_reg,
				LDO_SEQ_MASK << LDO_SEQ_SHIFT |
				LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT,
				LDO_SEQ_I2C << LDO_SEQ_SHIFT |
				LDO_I2C_EN << LDO_I2C_EN_SHIFT);
}

static int max8925_disable(struct regulator_dev *rdev)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);

	return max8925_set_bits(info->i2c, info->enable_reg,
				LDO_SEQ_MASK << LDO_SEQ_SHIFT |
				LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT,
				LDO_SEQ_I2C << LDO_SEQ_SHIFT);
}

static int max8925_is_enabled(struct regulator_dev *rdev)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	int ldo_seq, ret;

	ret = max8925_reg_read(info->i2c, info->enable_reg);
	if (ret < 0)
		return ret;
	ldo_seq = (ret >> LDO_SEQ_SHIFT) & LDO_SEQ_MASK;
	if (ldo_seq != LDO_SEQ_I2C)
		return 1;
	else
		return ret & (LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT);
}

static int max8925_set_dvm_voltage(struct regulator_dev *rdev, int uV)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	unsigned char data, mask;

	if (uV < SD1_DVM_VMIN || uV > SD1_DVM_VMAX)
		return -EINVAL;

	data = DIV_ROUND_UP(uV - SD1_DVM_VMIN, SD1_DVM_STEP);
	data <<= SD1_DVM_SHIFT;
	mask = 3 << SD1_DVM_SHIFT;

	return max8925_set_bits(info->i2c, info->enable_reg, mask, data);
}

static int max8925_set_dvm_enable(struct regulator_dev *rdev)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);

	return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN,
				1 << SD1_DVM_EN);
}

static int max8925_set_dvm_disable(struct regulator_dev *rdev)
{
	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);

	return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN, 0);
}

static const struct regulator_ops max8925_regulator_sdv_ops = {
	.map_voltage		= regulator_map_voltage_linear,
	.list_voltage		= regulator_list_voltage_linear,
	.set_voltage_sel	= max8925_set_voltage_sel,
	.get_voltage_sel	= max8925_get_voltage_sel,
	.enable			= max8925_enable,
	.disable		= max8925_disable,
	.is_enabled		= max8925_is_enabled,
	.set_suspend_voltage	= max8925_set_dvm_voltage,
	.set_suspend_enable	= max8925_set_dvm_enable,
	.set_suspend_disable	= max8925_set_dvm_disable,
};

static const struct regulator_ops max8925_regulator_ldo_ops = {
	.map_voltage		= regulator_map_voltage_linear,
	.list_voltage		= regulator_list_voltage_linear,
	.set_voltage_sel	= max8925_set_voltage_sel,
	.get_voltage_sel	= max8925_get_voltage_sel,
	.enable			= max8925_enable,
	.disable		= max8925_disable,
	.is_enabled		= max8925_is_enabled,
};

#define MAX8925_SDV(_id, min, max, step)			\
{								\
	.desc	= {						\
		.name	= "SDV" #_id,				\
		.ops	= &max8925_regulator_sdv_ops,		\
		.type	= REGULATOR_VOLTAGE,			\
		.id	= MAX8925_ID_SD##_id,			\
		.owner	= THIS_MODULE,				\
		.n_voltages = 64,				\
		.min_uV = min * 1000,				\
		.uV_step = step * 1000,				\
	},							\
	.vol_reg	= MAX8925_SDV##_id,			\
	.enable_reg	= MAX8925_SDCTL##_id,			\
}

#define MAX8925_LDO(_id, min, max, step)			\
{								\
	.desc	= {						\
		.name	= "LDO" #_id,				\
		.ops	= &max8925_regulator_ldo_ops,		\
		.type	= REGULATOR_VOLTAGE,			\
		.id	= MAX8925_ID_LDO##_id,			\
		.owner	= THIS_MODULE,				\
		.n_voltages = 64,				\
		.min_uV = min * 1000,				\
		.uV_step = step * 1000,				\
	},							\
	.vol_reg	= MAX8925_LDOVOUT##_id,			\
	.enable_reg	= MAX8925_LDOCTL##_id,			\
}

#ifdef CONFIG_OF
static struct of_regulator_match max8925_regulator_matches[] = {
	{ .name	= "SDV1",},
	{ .name = "SDV2",},
	{ .name = "SDV3",},
	{ .name = "LDO1",},
	{ .name = "LDO2",},
	{ .name = "LDO3",},
	{ .name = "LDO4",},
	{ .name = "LDO5",},
	{ .name = "LDO6",},
	{ .name = "LDO7",},
	{ .name = "LDO8",},
	{ .name = "LDO9",},
	{ .name = "LDO10",},
	{ .name = "LDO11",},
	{ .name = "LDO12",},
	{ .name = "LDO13",},
	{ .name = "LDO14",},
	{ .name = "LDO15",},
	{ .name = "LDO16",},
	{ .name = "LDO17",},
	{ .name = "LDO18",},
	{ .name = "LDO19",},
	{ .name = "LDO20",},
};
#endif

static struct max8925_regulator_info max8925_regulator_info[] = {
	MAX8925_SDV(1, 637.5, 1425, 12.5),
	MAX8925_SDV(2,   650, 2225,   25),
	MAX8925_SDV(3,   750, 3900,   50),

	MAX8925_LDO(1,  750, 3900, 50),
	MAX8925_LDO(2,  650, 2250, 25),
	MAX8925_LDO(3,  650, 2250, 25),
	MAX8925_LDO(4,  750, 3900, 50),
	MAX8925_LDO(5,  750, 3900, 50),
	MAX8925_LDO(6,  750, 3900, 50),
	MAX8925_LDO(7,  750, 3900, 50),
	MAX8925_LDO(8,  750, 3900, 50),
	MAX8925_LDO(9,  750, 3900, 50),
	MAX8925_LDO(10, 750, 3900, 50),
	MAX8925_LDO(11, 750, 3900, 50),
	MAX8925_LDO(12, 750, 3900, 50),
	MAX8925_LDO(13, 750, 3900, 50),
	MAX8925_LDO(14, 750, 3900, 50),
	MAX8925_LDO(15, 750, 3900, 50),
	MAX8925_LDO(16, 750, 3900, 50),
	MAX8925_LDO(17, 650, 2250, 25),
	MAX8925_LDO(18, 650, 2250, 25),
	MAX8925_LDO(19, 750, 3900, 50),
	MAX8925_LDO(20, 750, 3900, 50),
};

#ifdef CONFIG_OF
static int max8925_regulator_dt_init(struct platform_device *pdev,
				    struct regulator_config *config,
				    int ridx)
{
	struct device_node *nproot, *np;
	int rcount;

	nproot = pdev->dev.parent->of_node;
	if (!nproot)
		return -ENODEV;
	np = of_get_child_by_name(nproot, "regulators");
	if (!np) {
		dev_err(&pdev->dev, "failed to find regulators node\n");
		return -ENODEV;
	}

	rcount = of_regulator_match(&pdev->dev, np,
				&max8925_regulator_matches[ridx], 1);
	of_node_put(np);
	if (rcount < 0)
		return rcount;
	config->init_data =	max8925_regulator_matches[ridx].init_data;
	config->of_node = max8925_regulator_matches[ridx].of_node;

	return 0;
}
#else
#define max8925_regulator_dt_init(x, y, z)	(-1)
#endif

static int max8925_regulator_probe(struct platform_device *pdev)
{
	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
	struct regulator_init_data *pdata = dev_get_platdata(&pdev->dev);
	struct regulator_config config = { };
	struct max8925_regulator_info *ri;
	struct resource *res;
	struct regulator_dev *rdev;
	int i, regulator_idx;

	res = platform_get_resource(pdev, IORESOURCE_REG, 0);
	if (!res) {
		dev_err(&pdev->dev, "No REG resource!\n");
		return -EINVAL;
	}
	for (i = 0; i < ARRAY_SIZE(max8925_regulator_info); i++) {
		ri = &max8925_regulator_info[i];
		if (ri->vol_reg == res->start) {
			regulator_idx = i;
			break;
		}
	}

	if (i == ARRAY_SIZE(max8925_regulator_info)) {
		dev_err(&pdev->dev, "Failed to find regulator %llu\n",
			(unsigned long long)res->start);
		return -EINVAL;
	}
	ri->i2c = chip->i2c;

	config.dev = &pdev->dev;
	config.driver_data = ri;

	if (max8925_regulator_dt_init(pdev, &config, regulator_idx))
		if (pdata)
			config.init_data = pdata;

	rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
	if (IS_ERR(rdev)) {
		dev_err(&pdev->dev, "failed to register regulator %s\n",
				ri->desc.name);
		return PTR_ERR(rdev);
	}

	platform_set_drvdata(pdev, rdev);
	return 0;
}

static struct platform_driver max8925_regulator_driver = {
	.driver		= {
		.name	= "max8925-regulator",
	},
	.probe		= max8925_regulator_probe,
};

static int __init max8925_regulator_init(void)
{
	return platform_driver_register(&max8925_regulator_driver);
}
subsys_initcall(max8925_regulator_init);

static void __exit max8925_regulator_exit(void)
{
	platform_driver_unregister(&max8925_regulator_driver);
}
module_exit(max8925_regulator_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
MODULE_DESCRIPTION("Regulator Driver for Maxim 8925 PMIC");
MODULE_ALIAS("platform:max8925-regulator");
Commit	Line	Data
08ff6f2a HZ	1	/*
	2	* Regulators driver for Maxim max8925
	3	*
	4	* Copyright (C) 2009 Marvell International Ltd.
	5	* Haojian Zhuang <haojian.zhuang@marvell.com>
	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 version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11	#include <linux/kernel.h>
65602c32	12	#include <linux/module.h>
08ff6f2a HZ	13	#include <linux/init.h>
	14	#include <linux/err.h>
	15	#include <linux/i2c.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/regulator/driver.h>
	18	#include <linux/regulator/machine.h>
	19	#include <linux/mfd/max8925.h>
45b6f8e8 QX	20	#include <linux/of.h>
45b6f8e8 QX	21	#include <linux/regulator/of_regulator.h>
08ff6f2a HZ	22
	23	#define SD1_DVM_VMIN 850000
	24	#define SD1_DVM_VMAX 1000000
	25	#define SD1_DVM_STEP 50000
	26	#define SD1_DVM_SHIFT 5 /* SDCTL1 bit5 */
	27	#define SD1_DVM_EN 6 /* SDV1 bit 6 */
	28
65364e9a KL	29	/* bit definitions in LDO control registers */
	30	#define LDO_SEQ_I2C 0x7 /* Power U/D by i2c */
	31	#define LDO_SEQ_MASK 0x7 /* Power U/D sequence mask */
	32	#define LDO_SEQ_SHIFT 2 /* Power U/D sequence offset */
	33	#define LDO_I2C_EN 0x1 /* Enable by i2c */
	34	#define LDO_I2C_EN_MASK 0x1 /* Enable mask by i2c */
	35	#define LDO_I2C_EN_SHIFT 0 /* Enable offset by i2c */
db13c040	36
08ff6f2a HZ	37	struct max8925_regulator_info {
08ff6f2a HZ	38	struct regulator_desc desc;
08ff6f2a	39	struct i2c_client *i2c;
08ff6f2a	40
08ff6f2a	41	int vol_reg;
08ff6f2a HZ	42	int enable_reg;
	43	};
	44
cd8318cb AL	45	static int max8925_set_voltage_sel(struct regulator_dev *rdev,
cd8318cb AL	46	unsigned int selector)
08ff6f2a HZ	47	{
08ff6f2a HZ	48	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
cd8318cb	49	unsigned char mask = rdev->desc->n_voltages - 1;
08ff6f2a	50
cd8318cb	51	return max8925_set_bits(info->i2c, info->vol_reg, mask, selector);
08ff6f2a HZ	52	}
08ff6f2a HZ	53
3c8983b9	54	static int max8925_get_voltage_sel(struct regulator_dev *rdev)
08ff6f2a HZ	55	{
	56	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	57	unsigned char data, mask;
	58	int ret;
	59
	60	ret = max8925_reg_read(info->i2c, info->vol_reg);
	61	if (ret < 0)
	62	return ret;
7f52ba77 AL	63	mask = rdev->desc->n_voltages - 1;
7f52ba77 AL	64	data = ret & mask;
08ff6f2a	65
3c8983b9	66	return data;
08ff6f2a HZ	67	}
	68
	69	static int max8925_enable(struct regulator_dev *rdev)
	70	{
	71	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	72
	73	return max8925_set_bits(info->i2c, info->enable_reg,
65364e9a KL	74	LDO_SEQ_MASK << LDO_SEQ_SHIFT \|
	75	LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT,
	76	LDO_SEQ_I2C << LDO_SEQ_SHIFT \|
	77	LDO_I2C_EN << LDO_I2C_EN_SHIFT);
08ff6f2a HZ	78	}
	79
	80	static int max8925_disable(struct regulator_dev *rdev)
	81	{
	82	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	83
	84	return max8925_set_bits(info->i2c, info->enable_reg,
65364e9a KL	85	LDO_SEQ_MASK << LDO_SEQ_SHIFT \|
	86	LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT,
	87	LDO_SEQ_I2C << LDO_SEQ_SHIFT);
08ff6f2a HZ	88	}
	89
	90	static int max8925_is_enabled(struct regulator_dev *rdev)
	91	{
	92	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
65364e9a	93	int ldo_seq, ret;
08ff6f2a	94
4b99fef0	95	ret = max8925_reg_read(info->i2c, info->enable_reg);
08ff6f2a HZ	96	if (ret < 0)
08ff6f2a HZ	97	return ret;
65364e9a KL	98	ldo_seq = (ret >> LDO_SEQ_SHIFT) & LDO_SEQ_MASK;
	99	if (ldo_seq != LDO_SEQ_I2C)
	100	return 1;
	101	else
	102	return ret & (LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT);
08ff6f2a HZ	103	}
	104
	105	static int max8925_set_dvm_voltage(struct regulator_dev *rdev, int uV)
	106	{
	107	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	108	unsigned char data, mask;
	109
	110	if (uV < SD1_DVM_VMIN \|\| uV > SD1_DVM_VMAX)
	111	return -EINVAL;
	112
5db6d09a	113	data = DIV_ROUND_UP(uV - SD1_DVM_VMIN, SD1_DVM_STEP);
08ff6f2a HZ	114	data <<= SD1_DVM_SHIFT;
	115	mask = 3 << SD1_DVM_SHIFT;
	116
	117	return max8925_set_bits(info->i2c, info->enable_reg, mask, data);
	118	}
	119
	120	static int max8925_set_dvm_enable(struct regulator_dev *rdev)
	121	{
	122	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	123
	124	return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN,
	125	1 << SD1_DVM_EN);
	126	}
	127
	128	static int max8925_set_dvm_disable(struct regulator_dev *rdev)
	129	{
	130	struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
	131
	132	return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN, 0);
	133	}
	134
85214c9a	135	static const struct regulator_ops max8925_regulator_sdv_ops = {
cd8318cb	136	.map_voltage = regulator_map_voltage_linear,
4093e739	137	.list_voltage = regulator_list_voltage_linear,
cd8318cb	138	.set_voltage_sel = max8925_set_voltage_sel,
3c8983b9	139	.get_voltage_sel = max8925_get_voltage_sel,
08ff6f2a HZ	140	.enable = max8925_enable,
	141	.disable = max8925_disable,
	142	.is_enabled = max8925_is_enabled,
	143	.set_suspend_voltage = max8925_set_dvm_voltage,
	144	.set_suspend_enable = max8925_set_dvm_enable,
	145	.set_suspend_disable = max8925_set_dvm_disable,
	146	};
	147
85214c9a	148	static const struct regulator_ops max8925_regulator_ldo_ops = {
cd8318cb	149	.map_voltage = regulator_map_voltage_linear,
4093e739	150	.list_voltage = regulator_list_voltage_linear,
cd8318cb	151	.set_voltage_sel = max8925_set_voltage_sel,
3c8983b9	152	.get_voltage_sel = max8925_get_voltage_sel,
08ff6f2a HZ	153	.enable = max8925_enable,
	154	.disable = max8925_disable,
	155	.is_enabled = max8925_is_enabled,
	156	};
	157
	158	#define MAX8925_SDV(_id, min, max, step) \
	159	{ \
	160	.desc = { \
	161	.name = "SDV" #_id, \
	162	.ops = &max8925_regulator_sdv_ops, \
	163	.type = REGULATOR_VOLTAGE, \
	164	.id = MAX8925_ID_SD##_id, \
	165	.owner = THIS_MODULE, \
7f52ba77	166	.n_voltages = 64, \
4093e739 AL	167	.min_uV = min * 1000, \
4093e739 AL	168	.uV_step = step * 1000, \
08ff6f2a	169	}, \
08ff6f2a	170	.vol_reg = MAX8925_SDV##_id, \
08ff6f2a	171	.enable_reg = MAX8925_SDCTL##_id, \
08ff6f2a HZ	172	}
	173
	174	#define MAX8925_LDO(_id, min, max, step) \
	175	{ \
	176	.desc = { \
	177	.name = "LDO" #_id, \
	178	.ops = &max8925_regulator_ldo_ops, \
	179	.type = REGULATOR_VOLTAGE, \
	180	.id = MAX8925_ID_LDO##_id, \
	181	.owner = THIS_MODULE, \
7f52ba77	182	.n_voltages = 64, \
4093e739 AL	183	.min_uV = min * 1000, \
4093e739 AL	184	.uV_step = step * 1000, \
08ff6f2a	185	}, \
08ff6f2a	186	.vol_reg = MAX8925_LDOVOUT##_id, \
08ff6f2a	187	.enable_reg = MAX8925_LDOCTL##_id, \
08ff6f2a HZ	188	}
08ff6f2a HZ	189
45b6f8e8 QX	190	#ifdef CONFIG_OF
	191	static struct of_regulator_match max8925_regulator_matches[] = {
	192	{ .name = "SDV1",},
	193	{ .name = "SDV2",},
	194	{ .name = "SDV3",},
	195	{ .name = "LDO1",},
	196	{ .name = "LDO2",},
	197	{ .name = "LDO3",},
	198	{ .name = "LDO4",},
	199	{ .name = "LDO5",},
	200	{ .name = "LDO6",},
	201	{ .name = "LDO7",},
	202	{ .name = "LDO8",},
	203	{ .name = "LDO9",},
	204	{ .name = "LDO10",},
	205	{ .name = "LDO11",},
	206	{ .name = "LDO12",},
	207	{ .name = "LDO13",},
	208	{ .name = "LDO14",},
	209	{ .name = "LDO15",},
	210	{ .name = "LDO16",},
	211	{ .name = "LDO17",},
	212	{ .name = "LDO18",},
	213	{ .name = "LDO19",},
	214	{ .name = "LDO20",},
	215	};
	216	#endif
	217
08ff6f2a HZ	218	static struct max8925_regulator_info max8925_regulator_info[] = {
	219	MAX8925_SDV(1, 637.5, 1425, 12.5),
	220	MAX8925_SDV(2, 650, 2225, 25),
	221	MAX8925_SDV(3, 750, 3900, 50),
	222
	223	MAX8925_LDO(1, 750, 3900, 50),
	224	MAX8925_LDO(2, 650, 2250, 25),
	225	MAX8925_LDO(3, 650, 2250, 25),
	226	MAX8925_LDO(4, 750, 3900, 50),
	227	MAX8925_LDO(5, 750, 3900, 50),
	228	MAX8925_LDO(6, 750, 3900, 50),
	229	MAX8925_LDO(7, 750, 3900, 50),
	230	MAX8925_LDO(8, 750, 3900, 50),
	231	MAX8925_LDO(9, 750, 3900, 50),
	232	MAX8925_LDO(10, 750, 3900, 50),
	233	MAX8925_LDO(11, 750, 3900, 50),
	234	MAX8925_LDO(12, 750, 3900, 50),
	235	MAX8925_LDO(13, 750, 3900, 50),
	236	MAX8925_LDO(14, 750, 3900, 50),
	237	MAX8925_LDO(15, 750, 3900, 50),
	238	MAX8925_LDO(16, 750, 3900, 50),
	239	MAX8925_LDO(17, 650, 2250, 25),
	240	MAX8925_LDO(18, 650, 2250, 25),
	241	MAX8925_LDO(19, 750, 3900, 50),
	242	MAX8925_LDO(20, 750, 3900, 50),
	243	};
	244
45b6f8e8 QX	245	#ifdef CONFIG_OF
45b6f8e8 QX	246	static int max8925_regulator_dt_init(struct platform_device *pdev,
45b6f8e8 QX	247	struct regulator_config *config,
	248	int ridx)
	249	{
	250	struct device_node nproot, np;
	251	int rcount;
c74c76e8	252
b8b27a44	253	nproot = pdev->dev.parent->of_node;
45b6f8e8 QX	254	if (!nproot)
45b6f8e8 QX	255	return -ENODEV;
1f4f88c0	256	np = of_get_child_by_name(nproot, "regulators");
45b6f8e8 QX	257	if (!np) {
	258	dev_err(&pdev->dev, "failed to find regulators node\n");
	259	return -ENODEV;
	260	}
	261
	262	rcount = of_regulator_match(&pdev->dev, np,
	263	&max8925_regulator_matches[ridx], 1);
c92f5dd2	264	of_node_put(np);
45b6f8e8	265	if (rcount < 0)
e9fa1a3a	266	return rcount;
45b6f8e8 QX	267	config->init_data = max8925_regulator_matches[ridx].init_data;
	268	config->of_node = max8925_regulator_matches[ridx].of_node;
	269
	270	return 0;
	271	}
	272	#else
ad4928f1	273	#define max8925_regulator_dt_init(x, y, z) (-1)
45b6f8e8 QX	274	#endif
45b6f8e8 QX	275
a5023574	276	static int max8925_regulator_probe(struct platform_device *pdev)
08ff6f2a HZ	277	{
08ff6f2a HZ	278	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
dff91d0b	279	struct regulator_init_data *pdata = dev_get_platdata(&pdev->dev);
c172708d	280	struct regulator_config config = { };
3fff6c04	281	struct max8925_regulator_info *ri;
51acdb61	282	struct resource *res;
08ff6f2a	283	struct regulator_dev *rdev;
45b6f8e8	284	int i, regulator_idx;
08ff6f2a	285
51acdb61 HZ	286	res = platform_get_resource(pdev, IORESOURCE_REG, 0);
	287	if (!res) {
	288	dev_err(&pdev->dev, "No REG resource!\n");
	289	return -EINVAL;
	290	}
	291	for (i = 0; i < ARRAY_SIZE(max8925_regulator_info); i++) {
	292	ri = &max8925_regulator_info[i];
45b6f8e8 QX	293	if (ri->vol_reg == res->start) {
45b6f8e8 QX	294	regulator_idx = i;
51acdb61	295	break;
45b6f8e8	296	}
51acdb61	297	}
45b6f8e8	298
51acdb61 HZ	299	if (i == ARRAY_SIZE(max8925_regulator_info)) {
	300	dev_err(&pdev->dev, "Failed to find regulator %llu\n",
	301	(unsigned long long)res->start);
08ff6f2a HZ	302	return -EINVAL;
	303	}
	304	ri->i2c = chip->i2c;
08ff6f2a	305
c172708d	306	config.dev = &pdev->dev;
c172708d MB	307	config.driver_data = ri;
c172708d MB	308
ad4928f1	309	if (max8925_regulator_dt_init(pdev, &config, regulator_idx))
45b6f8e8 QX	310	if (pdata)
	311	config.init_data = pdata;
	312
58765e24	313	rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
08ff6f2a HZ	314	if (IS_ERR(rdev)) {
	315	dev_err(&pdev->dev, "failed to register regulator %s\n",
	316	ri->desc.name);
	317	return PTR_ERR(rdev);
	318	}
	319
	320	platform_set_drvdata(pdev, rdev);
	321	return 0;
	322	}
	323
08ff6f2a HZ	324	static struct platform_driver max8925_regulator_driver = {
	325	.driver = {
	326	.name = "max8925-regulator",
08ff6f2a HZ	327	},
08ff6f2a HZ	328	.probe = max8925_regulator_probe,
08ff6f2a HZ	329	};
	330
	331	static int __init max8925_regulator_init(void)
	332	{
	333	return platform_driver_register(&max8925_regulator_driver);
	334	}
	335	subsys_initcall(max8925_regulator_init);
	336
	337	static void __exit max8925_regulator_exit(void)
	338	{
	339	platform_driver_unregister(&max8925_regulator_driver);
	340	}
	341	module_exit(max8925_regulator_exit);
	342
	343	MODULE_LICENSE("GPL");
	344	MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
	345	MODULE_DESCRIPTION("Regulator Driver for Maxim 8925 PMIC");
	346	MODULE_ALIAS("platform:max8925-regulator");