[linux-block.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",
		.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",
		.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",
		.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",
		.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,
	},
};

#ifdef CONFIG_OF
static struct of_regulator_match isl9305_reg_matches[] = {
	[ISL9305_DCD1] = { .name = "dcd1" },
	[ISL9305_DCD2] = { .name = "dcd2" },
	[ISL9305_LDO1] = { .name = "ldo1" },
	[ISL9305_LDO2] = { .name = "ldo2" },
};

static struct of_regulator_match *isl9305_parse_dt(struct i2c_client *i2c)
{
	struct device_node *node = i2c->dev.of_node;
	struct of_regulator_match *matches;
	struct device_node *regs;
	int count;

	regs = of_get_child_by_name(node, "regulators");
	if (!regs)
		return NULL;

	matches = devm_kmemdup(&i2c->dev, isl9305_reg_matches,
			       sizeof(isl9305_reg_matches), GFP_KERNEL);
	if (!matches)
		return NULL;

	count = of_regulator_match(&i2c->dev, regs, matches,
				   ARRAY_SIZE(isl9305_reg_matches));
	of_node_put(regs);
	if ((count < 0) || (count > ARRAY_SIZE(isl9305_reg_matches)))
		return NULL;

	return matches;
}
#else
static struct of_regulator_match *isl9305_parse_dt(struct i2c_client *i2c)
{
	return NULL;
}
#endif

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 of_regulator_match *of_matches;
	struct regulator_dev *rdev;
	struct regmap *regmap;
	int i, ret;

	of_matches = isl9305_parse_dt(i2c);

	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++) {
		config.of_node = NULL;
		config.init_data = NULL;

		if (of_matches) {
			config.init_data = of_matches[i].init_data;
			config.of_node = of_matches[i].of_node;
		}

		if (!config.init_data && pdata)
			config.init_data = pdata->init_data[i];

		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" },
	{ .compatible = "isl,isl9305h" },
	{},
};
#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",
		.owner = THIS_MODULE,
		.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",
76	.n_voltages = 0x70,
77	.min_uV = 825000,
78	.uV_step = 25000,
79	.vsel_reg = ISL9305_DCD1OUT,
80	.vsel_mask = 0x7f,
81	.enable_reg = ISL9305_SYSTEM_PARAMETER,
82	.enable_mask = ISL9305_DCD1_EN,
83	.supply_name = "VINDCD1",
84	.ops = &isl9305_ops,
85	},
86	[ISL9305_DCD2] = {
87	.name = "DCD2",
88	.n_voltages = 0x70,
89	.min_uV = 825000,
90	.uV_step = 25000,
91	.vsel_reg = ISL9305_DCD2OUT,
92	.vsel_mask = 0x7f,
93	.enable_reg = ISL9305_SYSTEM_PARAMETER,
94	.enable_mask = ISL9305_DCD2_EN,
95	.supply_name = "VINDCD2",
96	.ops = &isl9305_ops,
97	},
98	[ISL9305_LDO1] = {
99	.name = "LDO1",
100	.n_voltages = 0x37,
101	.min_uV = 900000,
102	.uV_step = 50000,
103	.vsel_reg = ISL9305_LDO1OUT,
104	.vsel_mask = 0x3f,
105	.enable_reg = ISL9305_SYSTEM_PARAMETER,
106	.enable_mask = ISL9305_LDO1_EN,
107	.supply_name = "VINLDO1",
108	.ops = &isl9305_ops,
109	},
110	[ISL9305_LDO2] = {
111	.name = "LDO2",
112	.n_voltages = 0x37,
113	.min_uV = 900000,
114	.uV_step = 50000,
115	.vsel_reg = ISL9305_LDO2OUT,
116	.vsel_mask = 0x3f,
117	.enable_reg = ISL9305_SYSTEM_PARAMETER,
118	.enable_mask = ISL9305_LDO2_EN,
119	.supply_name = "VINLDO2",
120	.ops = &isl9305_ops,
121	},
122	};
123
124	#ifdef CONFIG_OF
125	static struct of_regulator_match isl9305_reg_matches[] = {
126	[ISL9305_DCD1] = { .name = "dcd1" },
127	[ISL9305_DCD2] = { .name = "dcd2" },
128	[ISL9305_LDO1] = { .name = "ldo1" },
129	[ISL9305_LDO2] = { .name = "ldo2" },
130	};
131
132	static struct of_regulator_match isl9305_parse_dt(struct i2c_client i2c)
133	{
134	struct device_node *node = i2c->dev.of_node;
135	struct of_regulator_match *matches;
136	struct device_node *regs;
137	int count;
138
139	regs = of_get_child_by_name(node, "regulators");
140	if (!regs)
141	return NULL;
142
143	matches = devm_kmemdup(&i2c->dev, isl9305_reg_matches,
144	sizeof(isl9305_reg_matches), GFP_KERNEL);
145	if (!matches)
146	return NULL;
147
148	count = of_regulator_match(&i2c->dev, regs, matches,
149	ARRAY_SIZE(isl9305_reg_matches));
150	of_node_put(regs);
151	if ((count < 0) \|\| (count > ARRAY_SIZE(isl9305_reg_matches)))
152	return NULL;
153
154	return matches;
155	}
156	#else
157	static struct of_regulator_match isl9305_parse_dt(struct i2c_client i2c)
158	{
159	return NULL;
160	}
161	#endif
162
163	static const struct regmap_config isl9305_regmap = {
164	.reg_bits = 8,
165	.val_bits = 8,
166
167	.max_register = ISL9305_MAX_REG,
168	.cache_type = REGCACHE_RBTREE,
169	};
170
171	static int isl9305_i2c_probe(struct i2c_client *i2c,
172	const struct i2c_device_id *id)
173	{
174	struct regulator_config config = { };
175	struct isl9305_pdata *pdata = i2c->dev.platform_data;
176	struct of_regulator_match *of_matches;
177	struct regulator_dev *rdev;
178	struct regmap *regmap;
179	int i, ret;
180
181	of_matches = isl9305_parse_dt(i2c);
182
183	regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap);
184	if (IS_ERR(regmap)) {
185	ret = PTR_ERR(regmap);
186	dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
187	return ret;
188	}
189
190	config.dev = &i2c->dev;
191
192	for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) {
193	config.of_node = NULL;
194	config.init_data = NULL;
195
196	if (of_matches) {
197	config.init_data = of_matches[i].init_data;
198	config.of_node = of_matches[i].of_node;
199	}
200
201	if (!config.init_data && pdata)
202	config.init_data = pdata->init_data[i];
203
204	rdev = devm_regulator_register(&i2c->dev,
205	&isl9305_regulators[i],
206	&config);
207	if (IS_ERR(rdev)) {
208	ret = PTR_ERR(rdev);
209	dev_err(&i2c->dev, "Failed to register %s: %d\n",
210	isl9305_regulators[i].name, ret);
211	return ret;
212	}
213	}
214
215	return 0;
216	}
217
218	#ifdef CONFIG_OF
219	static const struct of_device_id isl9305_dt_ids[] = {
220	{ .compatible = "isl,isl9305" },
221	{ .compatible = "isl,isl9305h" },
222	{},
223	};
224	#endif
225
226	static const struct i2c_device_id isl9305_i2c_id[] = {
227	{ "isl9305", },
228	{ "isl9305h", },
229	{ }
230	};
231	MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id);
232
233	static struct i2c_driver isl9305_regulator_driver = {
234	.driver = {
235	.name = "isl9305",
236	.owner = THIS_MODULE,
237	.of_match_table = of_match_ptr(isl9305_dt_ids),
238	},
239	.probe = isl9305_i2c_probe,
240	.id_table = isl9305_i2c_id,
241	};
242
243	module_i2c_driver(isl9305_regulator_driver);
244
245	MODULE_AUTHOR("Mark Brown");
246	MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator");
247	MODULE_LICENSE("GPL");