[mirror_ubuntu-artful-kernel.git] / drivers / regulator / isl9305.c

/*
 * isl9305 - Intersil ISL9305 DCDC regulator
 *
 * Copyright 2014 Linaro Ltd
 *
 * Author: Mark Brown <broonie@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.
 */

#include <linux/module.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/platform_data/isl9305.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>

/*
 * Registers
 */
#define ISL9305_DCD1OUT          0x0
#define ISL9305_DCD2OUT          0x1
#define ISL9305_LDO1OUT          0x2
#define ISL9305_LDO2OUT          0x3
#define ISL9305_DCD_PARAMETER    0x4
#define ISL9305_SYSTEM_PARAMETER 0x5
#define ISL9305_DCD_SRCTL        0x6

#define ISL9305_MAX_REG ISL9305_DCD_SRCTL

/*
 * DCD_PARAMETER
 */
#define ISL9305_DCD_PHASE   0x40
#define ISL9305_DCD2_ULTRA  0x20
#define ISL9305_DCD1_ULTRA  0x10
#define ISL9305_DCD2_BLD    0x08
#define ISL9305_DCD1_BLD    0x04
#define ISL9305_DCD2_MODE   0x02
#define ISL9305_DCD1_MODE   0x01

/*
 * SYSTEM_PARAMETER
 */
#define ISL9305_I2C_EN      0x40
#define ISL9305_DCDPOR_MASK 0x30
#define ISL9305_LDO2_EN     0x08
#define ISL9305_LDO1_EN     0x04
#define ISL9305_DCD2_EN     0x02
#define ISL9305_DCD1_EN     0x01

/*
 * DCD_SRCTL
 */
#define ISL9305_DCD2SR_MASK 0xc0
#define ISL9305_DCD1SR_MASK 0x07

static const struct regulator_ops isl9305_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
};

static const struct regulator_desc isl9305_regulators[] = {
	[ISL9305_DCD1] = {
		.name =		"DCD1",
		.of_match =	of_match_ptr("dcd1"),
		.regulators_node = of_match_ptr("regulators"),
		.n_voltages =	0x70,
		.min_uV =	825000,
		.uV_step =	25000,
		.vsel_reg =	ISL9305_DCD1OUT,
		.vsel_mask =	0x7f,
		.enable_reg =	ISL9305_SYSTEM_PARAMETER,
		.enable_mask =	ISL9305_DCD1_EN,
		.supply_name =	"VINDCD1",
		.ops =		&isl9305_ops,
	},
	[ISL9305_DCD2] = {
		.name =		"DCD2",
		.of_match =	of_match_ptr("dcd2"),
		.regulators_node = of_match_ptr("regulators"),
		.n_voltages =	0x70,
		.min_uV =	825000,
		.uV_step =	25000,
		.vsel_reg =	ISL9305_DCD2OUT,
		.vsel_mask =	0x7f,
		.enable_reg =	ISL9305_SYSTEM_PARAMETER,
		.enable_mask =	ISL9305_DCD2_EN,
		.supply_name =	"VINDCD2",
		.ops =		&isl9305_ops,
	},
	[ISL9305_LDO1] = {
		.name =		"LDO1",
		.of_match =	of_match_ptr("ldo1"),
		.regulators_node = of_match_ptr("regulators"),
		.n_voltages =	0x37,
		.min_uV =	900000,
		.uV_step =	50000,
		.vsel_reg =	ISL9305_LDO1OUT,
		.vsel_mask =	0x3f,
		.enable_reg =	ISL9305_SYSTEM_PARAMETER,
		.enable_mask =	ISL9305_LDO1_EN,
		.supply_name =	"VINLDO1",
		.ops =		&isl9305_ops,
	},
	[ISL9305_LDO2] = {
		.name =		"LDO2",
		.of_match =	of_match_ptr("ldo2"),
		.regulators_node = of_match_ptr("regulators"),
		.n_voltages =	0x37,
		.min_uV =	900000,
		.uV_step =	50000,
		.vsel_reg =	ISL9305_LDO2OUT,
		.vsel_mask =	0x3f,
		.enable_reg =	ISL9305_SYSTEM_PARAMETER,
		.enable_mask =	ISL9305_LDO2_EN,
		.supply_name =	"VINLDO2",
		.ops =		&isl9305_ops,
	},
};

static const struct regmap_config isl9305_regmap = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = ISL9305_MAX_REG,
	.cache_type = REGCACHE_RBTREE,
};

static int isl9305_i2c_probe(struct i2c_client *i2c,
			     const struct i2c_device_id *id)
{
	struct regulator_config config = { };
	struct isl9305_pdata *pdata = i2c->dev.platform_data;
	struct regulator_dev *rdev;
	struct regmap *regmap;
	int i, ret;

	regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap);
	if (IS_ERR(regmap)) {
		ret = PTR_ERR(regmap);
		dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
		return ret;
	}

	config.dev = &i2c->dev;

	for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) {
		if (pdata)
			config.init_data = pdata->init_data[i];
		else
			config.init_data = NULL;

		rdev = devm_regulator_register(&i2c->dev,
					       &isl9305_regulators[i],
					       &config);
		if (IS_ERR(rdev)) {
			ret = PTR_ERR(rdev);
			dev_err(&i2c->dev, "Failed to register %s: %d\n",
				isl9305_regulators[i].name, ret);
			return ret;
		}
	}

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id isl9305_dt_ids[] = {
	{ .compatible = "isl,isl9305" }, /* for backward compat., don't use */
	{ .compatible = "isil,isl9305" },
	{ .compatible = "isl,isl9305h" }, /* for backward compat., don't use */
	{ .compatible = "isil,isl9305h" },
	{},
};
MODULE_DEVICE_TABLE(of, isl9305_dt_ids);
#endif

static const struct i2c_device_id isl9305_i2c_id[] = {
	{ "isl9305", },
	{ "isl9305h", },
	{ }
};
MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id);

static struct i2c_driver isl9305_regulator_driver = {
	.driver = {
		.name = "isl9305",
		.of_match_table	= of_match_ptr(isl9305_dt_ids),
	},
	.probe = isl9305_i2c_probe,
	.id_table = isl9305_i2c_id,
};

module_i2c_driver(isl9305_regulator_driver);

MODULE_AUTHOR("Mark Brown");
MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator");
MODULE_LICENSE("GPL");
Commit	Line	Data
dec38b5c MB	1	/*
	2	* isl9305 - Intersil ISL9305 DCDC regulator
	3	*
	4	* Copyright 2014 Linaro Ltd
	5	*
	6	* Author: Mark Brown <broonie@kernel.org>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/err.h>
	16	#include <linux/i2c.h>
	17	#include <linux/of.h>
	18	#include <linux/platform_data/isl9305.h>
	19	#include <linux/regmap.h>
	20	#include <linux/regulator/driver.h>
	21	#include <linux/regulator/of_regulator.h>
	22	#include <linux/slab.h>
	23
	24	/*
	25	* Registers
	26	*/
	27	#define ISL9305_DCD1OUT 0x0
	28	#define ISL9305_DCD2OUT 0x1
	29	#define ISL9305_LDO1OUT 0x2
	30	#define ISL9305_LDO2OUT 0x3
	31	#define ISL9305_DCD_PARAMETER 0x4
	32	#define ISL9305_SYSTEM_PARAMETER 0x5
	33	#define ISL9305_DCD_SRCTL 0x6
	34
	35	#define ISL9305_MAX_REG ISL9305_DCD_SRCTL
	36
	37	/*
	38	* DCD_PARAMETER
	39	*/
	40	#define ISL9305_DCD_PHASE 0x40
	41	#define ISL9305_DCD2_ULTRA 0x20
	42	#define ISL9305_DCD1_ULTRA 0x10
	43	#define ISL9305_DCD2_BLD 0x08
	44	#define ISL9305_DCD1_BLD 0x04
	45	#define ISL9305_DCD2_MODE 0x02
	46	#define ISL9305_DCD1_MODE 0x01
	47
	48	/*
	49	* SYSTEM_PARAMETER
	50	*/
	51	#define ISL9305_I2C_EN 0x40
	52	#define ISL9305_DCDPOR_MASK 0x30
	53	#define ISL9305_LDO2_EN 0x08
	54	#define ISL9305_LDO1_EN 0x04
	55	#define ISL9305_DCD2_EN 0x02
	56	#define ISL9305_DCD1_EN 0x01
	57
	58	/*
	59	* DCD_SRCTL
	60	*/
	61	#define ISL9305_DCD2SR_MASK 0xc0
	62	#define ISL9305_DCD1SR_MASK 0x07
	63
	64	static const struct regulator_ops isl9305_ops = {
65	.enable = regulator_enable_regmap,
66	.disable = regulator_disable_regmap,
67	.is_enabled = regulator_is_enabled_regmap,
68	.list_voltage = regulator_list_voltage_linear,
69	.get_voltage_sel = regulator_get_voltage_sel_regmap,
70	.set_voltage_sel = regulator_set_voltage_sel_regmap,
71	};
72
73	static const struct regulator_desc isl9305_regulators[] = {
74	[ISL9305_DCD1] = {
75	.name = "DCD1",
93a127b1 MB	76	.of_match = of_match_ptr("dcd1"),
93a127b1 MB	77	.regulators_node = of_match_ptr("regulators"),
dec38b5c MB	78	.n_voltages = 0x70,
	79	.min_uV = 825000,
	80	.uV_step = 25000,
	81	.vsel_reg = ISL9305_DCD1OUT,
	82	.vsel_mask = 0x7f,
	83	.enable_reg = ISL9305_SYSTEM_PARAMETER,
	84	.enable_mask = ISL9305_DCD1_EN,
	85	.supply_name = "VINDCD1",
	86	.ops = &isl9305_ops,
	87	},
	88	[ISL9305_DCD2] = {
	89	.name = "DCD2",
93a127b1 MB	90	.of_match = of_match_ptr("dcd2"),
93a127b1 MB	91	.regulators_node = of_match_ptr("regulators"),
dec38b5c MB	92	.n_voltages = 0x70,
	93	.min_uV = 825000,
	94	.uV_step = 25000,
	95	.vsel_reg = ISL9305_DCD2OUT,
	96	.vsel_mask = 0x7f,
	97	.enable_reg = ISL9305_SYSTEM_PARAMETER,
	98	.enable_mask = ISL9305_DCD2_EN,
	99	.supply_name = "VINDCD2",
	100	.ops = &isl9305_ops,
	101	},
	102	[ISL9305_LDO1] = {
	103	.name = "LDO1",
93a127b1 MB	104	.of_match = of_match_ptr("ldo1"),
93a127b1 MB	105	.regulators_node = of_match_ptr("regulators"),
dec38b5c MB	106	.n_voltages = 0x37,
	107	.min_uV = 900000,
	108	.uV_step = 50000,
	109	.vsel_reg = ISL9305_LDO1OUT,
	110	.vsel_mask = 0x3f,
	111	.enable_reg = ISL9305_SYSTEM_PARAMETER,
	112	.enable_mask = ISL9305_LDO1_EN,
	113	.supply_name = "VINLDO1",
	114	.ops = &isl9305_ops,
	115	},
	116	[ISL9305_LDO2] = {
	117	.name = "LDO2",
93a127b1 MB	118	.of_match = of_match_ptr("ldo2"),
93a127b1 MB	119	.regulators_node = of_match_ptr("regulators"),
dec38b5c MB	120	.n_voltages = 0x37,
	121	.min_uV = 900000,
	122	.uV_step = 50000,
	123	.vsel_reg = ISL9305_LDO2OUT,
	124	.vsel_mask = 0x3f,
	125	.enable_reg = ISL9305_SYSTEM_PARAMETER,
	126	.enable_mask = ISL9305_LDO2_EN,
	127	.supply_name = "VINLDO2",
	128	.ops = &isl9305_ops,
	129	},
	130	};
	131
dec38b5c MB	132	static const struct regmap_config isl9305_regmap = {
	133	.reg_bits = 8,
	134	.val_bits = 8,
	135
	136	.max_register = ISL9305_MAX_REG,
	137	.cache_type = REGCACHE_RBTREE,
	138	};
	139
	140	static int isl9305_i2c_probe(struct i2c_client *i2c,
	141	const struct i2c_device_id *id)
	142	{
	143	struct regulator_config config = { };
	144	struct isl9305_pdata *pdata = i2c->dev.platform_data;
dec38b5c MB	145	struct regulator_dev *rdev;
	146	struct regmap *regmap;
	147	int i, ret;
	148
dec38b5c MB	149	regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap);
	150	if (IS_ERR(regmap)) {
	151	ret = PTR_ERR(regmap);
	152	dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
	153	return ret;
	154	}
	155
	156	config.dev = &i2c->dev;
	157
	158	for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) {
93a127b1	159	if (pdata)
dec38b5c	160	config.init_data = pdata->init_data[i];
93a127b1 MB	161	else
93a127b1 MB	162	config.init_data = NULL;
dec38b5c MB	163
	164	rdev = devm_regulator_register(&i2c->dev,
	165	&isl9305_regulators[i],
	166	&config);
	167	if (IS_ERR(rdev)) {
	168	ret = PTR_ERR(rdev);
	169	dev_err(&i2c->dev, "Failed to register %s: %d\n",
	170	isl9305_regulators[i].name, ret);
	171	return ret;
	172	}
	173	}
	174
	175	return 0;
	176	}
	177
	178	#ifdef CONFIG_OF
	179	static const struct of_device_id isl9305_dt_ids[] = {
6fd75357 AE	180	{ .compatible = "isl,isl9305" }, /* for backward compat., don't use */
	181	{ .compatible = "isil,isl9305" },
	182	{ .compatible = "isl,isl9305h" }, /* for backward compat., don't use */
	183	{ .compatible = "isil,isl9305h" },
dec38b5c MB	184	{},
dec38b5c MB	185	};
5b87af4c	186	MODULE_DEVICE_TABLE(of, isl9305_dt_ids);
dec38b5c MB	187	#endif
	188
	189	static const struct i2c_device_id isl9305_i2c_id[] = {
	190	{ "isl9305", },
	191	{ "isl9305h", },
	192	{ }
	193	};
	194	MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id);
	195
	196	static struct i2c_driver isl9305_regulator_driver = {
	197	.driver = {
	198	.name = "isl9305",
dec38b5c MB	199	.of_match_table = of_match_ptr(isl9305_dt_ids),
	200	},
	201	.probe = isl9305_i2c_probe,
	202	.id_table = isl9305_i2c_id,
	203	};
	204
	205	module_i2c_driver(isl9305_regulator_driver);
	206
	207	MODULE_AUTHOR("Mark Brown");
	208	MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator");
	209	MODULE_LICENSE("GPL");