[mirror_ubuntu-zesty-kernel.git] / drivers / regulator / act8865-regulator.c

/*
 * act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs
 *
 * http://www.active-semi.com/products/power-management-units/act88xx/
 *
 * Copyright (C) 2013 Atmel Corporation
 *
 * 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/init.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/act8865.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regmap.h>

/*
 * ACT8846 Global Register Map.
 */
#define	ACT8846_SYS0		0x00
#define	ACT8846_SYS1		0x01
#define	ACT8846_REG1_VSET	0x10
#define	ACT8846_REG1_CTRL	0x12
#define	ACT8846_REG2_VSET0	0x20
#define	ACT8846_REG2_VSET1	0x21
#define	ACT8846_REG2_CTRL	0x22
#define	ACT8846_REG3_VSET0	0x30
#define	ACT8846_REG3_VSET1	0x31
#define	ACT8846_REG3_CTRL	0x32
#define	ACT8846_REG4_VSET0	0x40
#define	ACT8846_REG4_VSET1	0x41
#define	ACT8846_REG4_CTRL	0x42
#define	ACT8846_REG5_VSET	0x50
#define	ACT8846_REG5_CTRL	0x51
#define	ACT8846_REG6_VSET	0x58
#define	ACT8846_REG6_CTRL	0x59
#define	ACT8846_REG7_VSET	0x60
#define	ACT8846_REG7_CTRL	0x61
#define	ACT8846_REG8_VSET	0x68
#define	ACT8846_REG8_CTRL	0x69
#define	ACT8846_REG9_VSET	0x70
#define	ACT8846_REG9_CTRL	0x71
#define	ACT8846_REG10_VSET	0x80
#define	ACT8846_REG10_CTRL	0x81
#define	ACT8846_REG11_VSET	0x90
#define	ACT8846_REG11_CTRL	0x91
#define	ACT8846_REG12_VSET	0xa0
#define	ACT8846_REG12_CTRL	0xa1
#define	ACT8846_REG13_CTRL	0xb1
#define	ACT8846_GLB_OFF_CTRL	0xc3
#define	ACT8846_OFF_SYSMASK	0x18

/*
 * ACT8865 Global Register Map.
 */
#define	ACT8865_SYS_MODE	0x00
#define	ACT8865_SYS_CTRL	0x01
#define	ACT8865_DCDC1_VSET1	0x20
#define	ACT8865_DCDC1_VSET2	0x21
#define	ACT8865_DCDC1_CTRL	0x22
#define	ACT8865_DCDC2_VSET1	0x30
#define	ACT8865_DCDC2_VSET2	0x31
#define	ACT8865_DCDC2_CTRL	0x32
#define	ACT8865_DCDC3_VSET1	0x40
#define	ACT8865_DCDC3_VSET2	0x41
#define	ACT8865_DCDC3_CTRL	0x42
#define	ACT8865_LDO1_VSET	0x50
#define	ACT8865_LDO1_CTRL	0x51
#define	ACT8865_LDO2_VSET	0x54
#define	ACT8865_LDO2_CTRL	0x55
#define	ACT8865_LDO3_VSET	0x60
#define	ACT8865_LDO3_CTRL	0x61
#define	ACT8865_LDO4_VSET	0x64
#define	ACT8865_LDO4_CTRL	0x65
#define	ACT8865_MSTROFF		0x20

/*
 * Field Definitions.
 */
#define	ACT8865_ENA		0x80	/* ON - [7] */
#define	ACT8865_VSEL_MASK	0x3F	/* VSET - [5:0] */

/*
 * ACT8865 voltage number
 */
#define	ACT8865_VOLTAGE_NUM	64

struct act8865 {
	struct regmap *regmap;
	int off_reg;
	int off_mask;
};

static const struct regmap_config act8865_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
};

static const struct regulator_linear_range act8865_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
	REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
	REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
};

static struct regulator_ops act8865_ops = {
	.list_voltage		= regulator_list_voltage_linear_range,
	.map_voltage		= regulator_map_voltage_linear_range,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.is_enabled		= regulator_is_enabled_regmap,
};

#define ACT88xx_REG(_name, _family, _id, _vsel_reg)			\
	[_family##_ID_##_id] = {					\
		.name			= _name,			\
		.id			= _family##_ID_##_id,		\
		.type			= REGULATOR_VOLTAGE,		\
		.ops			= &act8865_ops,			\
		.n_voltages		= ACT8865_VOLTAGE_NUM,		\
		.linear_ranges		= act8865_voltage_ranges,	\
		.n_linear_ranges	= ARRAY_SIZE(act8865_voltage_ranges), \
		.vsel_reg		= _family##_##_id##_##_vsel_reg, \
		.vsel_mask		= ACT8865_VSEL_MASK,		\
		.enable_reg		= _family##_##_id##_CTRL,	\
		.enable_mask		= ACT8865_ENA,			\
		.owner			= THIS_MODULE,			\
	}

static const struct regulator_desc act8846_regulators[] = {
	ACT88xx_REG("REG1", ACT8846, REG1, VSET),
	ACT88xx_REG("REG2", ACT8846, REG2, VSET0),
	ACT88xx_REG("REG3", ACT8846, REG3, VSET0),
	ACT88xx_REG("REG4", ACT8846, REG4, VSET0),
	ACT88xx_REG("REG5", ACT8846, REG5, VSET),
	ACT88xx_REG("REG6", ACT8846, REG6, VSET),
	ACT88xx_REG("REG7", ACT8846, REG7, VSET),
	ACT88xx_REG("REG8", ACT8846, REG8, VSET),
	ACT88xx_REG("REG9", ACT8846, REG9, VSET),
	ACT88xx_REG("REG10", ACT8846, REG10, VSET),
	ACT88xx_REG("REG11", ACT8846, REG11, VSET),
	ACT88xx_REG("REG12", ACT8846, REG12, VSET),
};

static const struct regulator_desc act8865_regulators[] = {
	ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1),
	ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1),
	ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1),
	ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET),
	ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET),
	ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET),
	ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET),
};

#ifdef CONFIG_OF
static const struct of_device_id act8865_dt_ids[] = {
	{ .compatible = "active-semi,act8846", .data = (void *)ACT8846 },
	{ .compatible = "active-semi,act8865", .data = (void *)ACT8865 },
	{ }
};
MODULE_DEVICE_TABLE(of, act8865_dt_ids);

static struct of_regulator_match act8846_matches[] = {
	[ACT8846_ID_REG1]	= { .name = "REG1" },
	[ACT8846_ID_REG2]	= { .name = "REG2" },
	[ACT8846_ID_REG3]	= { .name = "REG3" },
	[ACT8846_ID_REG4]	= { .name = "REG4" },
	[ACT8846_ID_REG5]	= { .name = "REG5" },
	[ACT8846_ID_REG6]	= { .name = "REG6" },
	[ACT8846_ID_REG7]	= { .name = "REG7" },
	[ACT8846_ID_REG8]	= { .name = "REG8" },
	[ACT8846_ID_REG9]	= { .name = "REG9" },
	[ACT8846_ID_REG10]	= { .name = "REG10" },
	[ACT8846_ID_REG11]	= { .name = "REG11" },
	[ACT8846_ID_REG12]	= { .name = "REG12" },
};

static struct of_regulator_match act8865_matches[] = {
	[ACT8865_ID_DCDC1]	= { .name = "DCDC_REG1"},
	[ACT8865_ID_DCDC2]	= { .name = "DCDC_REG2"},
	[ACT8865_ID_DCDC3]	= { .name = "DCDC_REG3"},
	[ACT8865_ID_LDO1]	= { .name = "LDO_REG1"},
	[ACT8865_ID_LDO2]	= { .name = "LDO_REG2"},
	[ACT8865_ID_LDO3]	= { .name = "LDO_REG3"},
	[ACT8865_ID_LDO4]	= { .name = "LDO_REG4"},
};

static int act8865_pdata_from_dt(struct device *dev,
				 struct device_node **of_node,
				 struct act8865_platform_data *pdata,
				 unsigned long type)
{
	int matched, i, num_matches;
	struct device_node *np;
	struct act8865_regulator_data *regulator;
	struct of_regulator_match *matches;

	np = of_get_child_by_name(dev->of_node, "regulators");
	if (!np) {
		dev_err(dev, "missing 'regulators' subnode in DT\n");
		return -EINVAL;
	}

	switch (type) {
	case ACT8846:
		matches = act8846_matches;
		num_matches = ARRAY_SIZE(act8846_matches);
		break;
	case ACT8865:
		matches = act8865_matches;
		num_matches = ARRAY_SIZE(act8865_matches);
		break;
	default:
		dev_err(dev, "invalid device id %lu\n", type);
		return -EINVAL;
	}

	matched = of_regulator_match(dev, np, matches, num_matches);
	of_node_put(np);
	if (matched <= 0)
		return matched;

	pdata->regulators = devm_kzalloc(dev,
					 sizeof(struct act8865_regulator_data) *
					 num_matches, GFP_KERNEL);
	if (!pdata->regulators)
		return -ENOMEM;

	pdata->num_regulators = num_matches;
	regulator = pdata->regulators;

	for (i = 0; i < num_matches; i++) {
		regulator->id = i;
		regulator->name = matches[i].name;
		regulator->platform_data = matches[i].init_data;
		of_node[i] = matches[i].of_node;
		regulator++;
	}

	return 0;
}
#else
static inline int act8865_pdata_from_dt(struct device *dev,
					struct device_node **of_node,
					struct act8865_platform_data *pdata,
					unsigned long type)
{
	return 0;
}
#endif

static struct regulator_init_data
*act8865_get_init_data(int id, struct act8865_platform_data *pdata)
{
	int i;

	if (!pdata)
		return NULL;

	for (i = 0; i < pdata->num_regulators; i++) {
		if (pdata->regulators[i].id == id)
			return pdata->regulators[i].platform_data;
	}

	return NULL;
}

static struct i2c_client *act8865_i2c_client;
static void act8865_power_off(void)
{
	struct act8865 *act8865;

	act8865 = i2c_get_clientdata(act8865_i2c_client);
	regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask);
	while (1);
}

static int act8865_pmic_probe(struct i2c_client *client,
			      const struct i2c_device_id *i2c_id)
{
	static const struct regulator_desc *regulators;
	struct act8865_platform_data pdata_of, *pdata;
	struct device *dev = &client->dev;
	struct device_node **of_node;
	int i, ret, num_regulators;
	struct act8865 *act8865;
	unsigned long type;
	int off_reg, off_mask;

	pdata = dev_get_platdata(dev);

	if (dev->of_node && !pdata) {
		const struct of_device_id *id;

		id = of_match_device(of_match_ptr(act8865_dt_ids), dev);
		if (!id)
			return -ENODEV;

		type = (unsigned long) id->data;
	} else {
		type = i2c_id->driver_data;
	}

	switch (type) {
	case ACT8846:
		regulators = act8846_regulators;
		num_regulators = ARRAY_SIZE(act8846_regulators);
		off_reg = ACT8846_GLB_OFF_CTRL;
		off_mask = ACT8846_OFF_SYSMASK;
		break;
	case ACT8865:
		regulators = act8865_regulators;
		num_regulators = ARRAY_SIZE(act8865_regulators);
		off_reg = ACT8865_SYS_CTRL;
		off_mask = ACT8865_MSTROFF;
		break;
	default:
		dev_err(dev, "invalid device id %lu\n", type);
		return -EINVAL;
	}

	of_node = devm_kzalloc(dev, sizeof(struct device_node *) *
			       num_regulators, GFP_KERNEL);
	if (!of_node)
		return -ENOMEM;

	if (dev->of_node && !pdata) {
		ret = act8865_pdata_from_dt(dev, of_node, &pdata_of, type);
		if (ret < 0)
			return ret;

		pdata = &pdata_of;
	}

	if (pdata->num_regulators > num_regulators) {
		dev_err(dev, "too many regulators: %d\n",
			pdata->num_regulators);
		return -EINVAL;
	}

	act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL);
	if (!act8865)
		return -ENOMEM;

	act8865->regmap = devm_regmap_init_i2c(client, &act8865_regmap_config);
	if (IS_ERR(act8865->regmap)) {
		ret = PTR_ERR(act8865->regmap);
		dev_err(&client->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	if (of_system_has_poweroff_source(dev->of_node)) {
		if (!pm_power_off) {
			act8865_i2c_client = client;
			act8865->off_reg = off_reg;
			act8865->off_mask = off_mask;
			pm_power_off = act8865_power_off;
		} else {
			dev_err(dev, "Failed to set poweroff capability, already defined\n");
		}
	}

	/* Finally register devices */
	for (i = 0; i < num_regulators; i++) {
		const struct regulator_desc *desc = &regulators[i];
		struct regulator_config config = { };
		struct regulator_dev *rdev;

		config.dev = dev;
		config.init_data = act8865_get_init_data(desc->id, pdata);
		config.of_node = of_node[i];
		config.driver_data = act8865;
		config.regmap = act8865->regmap;

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

	i2c_set_clientdata(client, act8865);
	devm_kfree(dev, of_node);

	return 0;
}

static const struct i2c_device_id act8865_ids[] = {
	{ .name = "act8846", .driver_data = ACT8846 },
	{ .name = "act8865", .driver_data = ACT8865 },
	{ },
};
MODULE_DEVICE_TABLE(i2c, act8865_ids);

static struct i2c_driver act8865_pmic_driver = {
	.driver	= {
		.name	= "act8865",
		.owner	= THIS_MODULE,
	},
	.probe		= act8865_pmic_probe,
	.id_table	= act8865_ids,
};

module_i2c_driver(act8865_pmic_driver);

MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver");
MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
33036f48	1	/*
50a03e35 BG	2	* act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs
	3	*
	4	* http://www.active-semi.com/products/power-management-units/act88xx/
33036f48 WY	5	*
	6	* Copyright (C) 2013 Atmel Corporation
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*/
	18
	19	#include <linux/module.h>
	20	#include <linux/init.h>
	21	#include <linux/i2c.h>
	22	#include <linux/err.h>
	23	#include <linux/platform_device.h>
	24	#include <linux/regulator/driver.h>
	25	#include <linux/regulator/act8865.h>
	26	#include <linux/of.h>
	27	#include <linux/of_device.h>
	28	#include <linux/regulator/of_regulator.h>
	29	#include <linux/regmap.h>
	30
ac0c0ea8 BG	31	/*
	32	* ACT8846 Global Register Map.
	33	*/
	34	#define ACT8846_SYS0 0x00
	35	#define ACT8846_SYS1 0x01
	36	#define ACT8846_REG1_VSET 0x10
	37	#define ACT8846_REG1_CTRL 0x12
	38	#define ACT8846_REG2_VSET0 0x20
	39	#define ACT8846_REG2_VSET1 0x21
	40	#define ACT8846_REG2_CTRL 0x22
	41	#define ACT8846_REG3_VSET0 0x30
	42	#define ACT8846_REG3_VSET1 0x31
	43	#define ACT8846_REG3_CTRL 0x32
	44	#define ACT8846_REG4_VSET0 0x40
	45	#define ACT8846_REG4_VSET1 0x41
	46	#define ACT8846_REG4_CTRL 0x42
	47	#define ACT8846_REG5_VSET 0x50
	48	#define ACT8846_REG5_CTRL 0x51
	49	#define ACT8846_REG6_VSET 0x58
	50	#define ACT8846_REG6_CTRL 0x59
	51	#define ACT8846_REG7_VSET 0x60
	52	#define ACT8846_REG7_CTRL 0x61
	53	#define ACT8846_REG8_VSET 0x68
	54	#define ACT8846_REG8_CTRL 0x69
	55	#define ACT8846_REG9_VSET 0x70
	56	#define ACT8846_REG9_CTRL 0x71
	57	#define ACT8846_REG10_VSET 0x80
	58	#define ACT8846_REG10_CTRL 0x81
	59	#define ACT8846_REG11_VSET 0x90
	60	#define ACT8846_REG11_CTRL 0x91
	61	#define ACT8846_REG12_VSET 0xa0
	62	#define ACT8846_REG12_CTRL 0xa1
	63	#define ACT8846_REG13_CTRL 0xb1
2b17fa28 RP	64	#define ACT8846_GLB_OFF_CTRL 0xc3
2b17fa28 RP	65	#define ACT8846_OFF_SYSMASK 0x18
ac0c0ea8	66
33036f48 WY	67	/*
	68	* ACT8865 Global Register Map.
	69	*/
	70	#define ACT8865_SYS_MODE 0x00
	71	#define ACT8865_SYS_CTRL 0x01
	72	#define ACT8865_DCDC1_VSET1 0x20
	73	#define ACT8865_DCDC1_VSET2 0x21
	74	#define ACT8865_DCDC1_CTRL 0x22
	75	#define ACT8865_DCDC2_VSET1 0x30
	76	#define ACT8865_DCDC2_VSET2 0x31
	77	#define ACT8865_DCDC2_CTRL 0x32
	78	#define ACT8865_DCDC3_VSET1 0x40
	79	#define ACT8865_DCDC3_VSET2 0x41
	80	#define ACT8865_DCDC3_CTRL 0x42
	81	#define ACT8865_LDO1_VSET 0x50
	82	#define ACT8865_LDO1_CTRL 0x51
	83	#define ACT8865_LDO2_VSET 0x54
	84	#define ACT8865_LDO2_CTRL 0x55
	85	#define ACT8865_LDO3_VSET 0x60
	86	#define ACT8865_LDO3_CTRL 0x61
	87	#define ACT8865_LDO4_VSET 0x64
	88	#define ACT8865_LDO4_CTRL 0x65
2b17fa28	89	#define ACT8865_MSTROFF 0x20
33036f48 WY	90
	91	/*
	92	* Field Definitions.
	93	*/
	94	#define ACT8865_ENA 0x80 /* ON - [7] */
	95	#define ACT8865_VSEL_MASK 0x3F /* VSET - [5:0] */
	96
	97	/*
	98	* ACT8865 voltage number
	99	*/
	100	#define ACT8865_VOLTAGE_NUM 64
	101
	102	struct act8865 {
33036f48	103	struct regmap *regmap;
2b17fa28 RP	104	int off_reg;
2b17fa28 RP	105	int off_mask;
33036f48 WY	106	};
	107
	108	static const struct regmap_config act8865_regmap_config = {
	109	.reg_bits = 8,
	110	.val_bits = 8,
	111	};
	112
50a03e35	113	static const struct regulator_linear_range act8865_voltage_ranges[] = {
33036f48 WY	114	REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
	115	REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
	116	REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
	117	};
	118
	119	static struct regulator_ops act8865_ops = {
	120	.list_voltage = regulator_list_voltage_linear_range,
	121	.map_voltage = regulator_map_voltage_linear_range,
	122	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	123	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	124	.enable = regulator_enable_regmap,
	125	.disable = regulator_disable_regmap,
	126	.is_enabled = regulator_is_enabled_regmap,
33036f48 WY	127	};
33036f48 WY	128
50a03e35 BG	129	#define ACT88xx_REG(_name, _family, _id, _vsel_reg) \
	130	[_family##_ID_##_id] = { \
	131	.name = _name, \
	132	.id = _family##_ID_##_id, \
	133	.type = REGULATOR_VOLTAGE, \
	134	.ops = &act8865_ops, \
	135	.n_voltages = ACT8865_VOLTAGE_NUM, \
	136	.linear_ranges = act8865_voltage_ranges, \
	137	.n_linear_ranges = ARRAY_SIZE(act8865_voltage_ranges), \
	138	.vsel_reg = _family##_##_id##_##_vsel_reg, \
	139	.vsel_mask = ACT8865_VSEL_MASK, \
	140	.enable_reg = _family##_##_id##_CTRL, \
	141	.enable_mask = ACT8865_ENA, \
	142	.owner = THIS_MODULE, \
	143	}
	144
ac0c0ea8 BG	145	static const struct regulator_desc act8846_regulators[] = {
	146	ACT88xx_REG("REG1", ACT8846, REG1, VSET),
	147	ACT88xx_REG("REG2", ACT8846, REG2, VSET0),
	148	ACT88xx_REG("REG3", ACT8846, REG3, VSET0),
	149	ACT88xx_REG("REG4", ACT8846, REG4, VSET0),
	150	ACT88xx_REG("REG5", ACT8846, REG5, VSET),
	151	ACT88xx_REG("REG6", ACT8846, REG6, VSET),
	152	ACT88xx_REG("REG7", ACT8846, REG7, VSET),
	153	ACT88xx_REG("REG8", ACT8846, REG8, VSET),
	154	ACT88xx_REG("REG9", ACT8846, REG9, VSET),
	155	ACT88xx_REG("REG10", ACT8846, REG10, VSET),
	156	ACT88xx_REG("REG11", ACT8846, REG11, VSET),
	157	ACT88xx_REG("REG12", ACT8846, REG12, VSET),
	158	};
	159
50a03e35 BG	160	static const struct regulator_desc act8865_regulators[] = {
	161	ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1),
	162	ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1),
	163	ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1),
	164	ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET),
	165	ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET),
	166	ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET),
	167	ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET),
33036f48 WY	168	};
	169
	170	#ifdef CONFIG_OF
	171	static const struct of_device_id act8865_dt_ids[] = {
ac0c0ea8	172	{ .compatible = "active-semi,act8846", .data = (void *)ACT8846 },
50a03e35	173	{ .compatible = "active-semi,act8865", .data = (void *)ACT8865 },
33036f48 WY	174	{ }
	175	};
	176	MODULE_DEVICE_TABLE(of, act8865_dt_ids);
	177
ac0c0ea8 BG	178	static struct of_regulator_match act8846_matches[] = {
	179	[ACT8846_ID_REG1] = { .name = "REG1" },
	180	[ACT8846_ID_REG2] = { .name = "REG2" },
	181	[ACT8846_ID_REG3] = { .name = "REG3" },
	182	[ACT8846_ID_REG4] = { .name = "REG4" },
	183	[ACT8846_ID_REG5] = { .name = "REG5" },
	184	[ACT8846_ID_REG6] = { .name = "REG6" },
	185	[ACT8846_ID_REG7] = { .name = "REG7" },
	186	[ACT8846_ID_REG8] = { .name = "REG8" },
	187	[ACT8846_ID_REG9] = { .name = "REG9" },
	188	[ACT8846_ID_REG10] = { .name = "REG10" },
	189	[ACT8846_ID_REG11] = { .name = "REG11" },
	190	[ACT8846_ID_REG12] = { .name = "REG12" },
	191	};
	192
33036f48 WY	193	static struct of_regulator_match act8865_matches[] = {
	194	[ACT8865_ID_DCDC1] = { .name = "DCDC_REG1"},
	195	[ACT8865_ID_DCDC2] = { .name = "DCDC_REG2"},
	196	[ACT8865_ID_DCDC3] = { .name = "DCDC_REG3"},
	197	[ACT8865_ID_LDO1] = { .name = "LDO_REG1"},
	198	[ACT8865_ID_LDO2] = { .name = "LDO_REG2"},
	199	[ACT8865_ID_LDO3] = { .name = "LDO_REG3"},
	200	[ACT8865_ID_LDO4] = { .name = "LDO_REG4"},
	201	};
	202
	203	static int act8865_pdata_from_dt(struct device *dev,
	204	struct device_node **of_node,
50a03e35	205	struct act8865_platform_data *pdata,
34e0247f	206	unsigned long type)
33036f48	207	{
34e0247f	208	int matched, i, num_matches;
33036f48 WY	209	struct device_node *np;
33036f48 WY	210	struct act8865_regulator_data *regulator;
34e0247f	211	struct of_regulator_match *matches;
33036f48	212
6ea970a9	213	np = of_get_child_by_name(dev->of_node, "regulators");
33036f48 WY	214	if (!np) {
	215	dev_err(dev, "missing 'regulators' subnode in DT\n");
	216	return -EINVAL;
	217	}
	218
34e0247f BG	219	switch (type) {
	220	case ACT8846:
	221	matches = act8846_matches;
	222	num_matches = ARRAY_SIZE(act8846_matches);
	223	break;
	224	case ACT8865:
	225	matches = act8865_matches;
	226	num_matches = ARRAY_SIZE(act8865_matches);
	227	break;
	228	default:
	229	dev_err(dev, "invalid device id %lu\n", type);
	230	return -EINVAL;
	231	}
	232
50a03e35	233	matched = of_regulator_match(dev, np, matches, num_matches);
0079eb53	234	of_node_put(np);
33036f48 WY	235	if (matched <= 0)
	236	return matched;
	237
	238	pdata->regulators = devm_kzalloc(dev,
50a03e35 BG	239	sizeof(struct act8865_regulator_data) *
50a03e35 BG	240	num_matches, GFP_KERNEL);
5ee77ef2	241	if (!pdata->regulators)
33036f48	242	return -ENOMEM;
33036f48	243
50a03e35	244	pdata->num_regulators = num_matches;
33036f48 WY	245	regulator = pdata->regulators;
33036f48 WY	246
50a03e35	247	for (i = 0; i < num_matches; i++) {
33036f48	248	regulator->id = i;
50a03e35 BG	249	regulator->name = matches[i].name;
	250	regulator->platform_data = matches[i].init_data;
	251	of_node[i] = matches[i].of_node;
33036f48 WY	252	regulator++;
	253	}
	254
	255	return 0;
	256	}
	257	#else
	258	static inline int act8865_pdata_from_dt(struct device *dev,
	259	struct device_node **of_node,
34e0247f BG	260	struct act8865_platform_data *pdata,
34e0247f BG	261	unsigned long type)
33036f48 WY	262	{
	263	return 0;
	264	}
	265	#endif
	266
48a1e1b5 BG	267	static struct regulator_init_data
	268	act8865_get_init_data(int id, struct act8865_platform_data pdata)
	269	{
	270	int i;
	271
	272	if (!pdata)
	273	return NULL;
	274
	275	for (i = 0; i < pdata->num_regulators; i++) {
	276	if (pdata->regulators[i].id == id)
	277	return pdata->regulators[i].platform_data;
	278	}
	279
	280	return NULL;
	281	}
	282
2b17fa28 RP	283	static struct i2c_client *act8865_i2c_client;
	284	static void act8865_power_off(void)
	285	{
	286	struct act8865 *act8865;
	287
	288	act8865 = i2c_get_clientdata(act8865_i2c_client);
	289	regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask);
	290	while (1);
	291	}
	292
33036f48	293	static int act8865_pmic_probe(struct i2c_client *client,
50a03e35	294	const struct i2c_device_id *i2c_id)
33036f48	295	{
50a03e35 BG	296	static const struct regulator_desc *regulators;
50a03e35 BG	297	struct act8865_platform_data pdata_of, *pdata;
33036f48	298	struct device *dev = &client->dev;
50a03e35 BG	299	struct device_node **of_node;
50a03e35 BG	300	int i, ret, num_regulators;
33036f48	301	struct act8865 *act8865;
50a03e35	302	unsigned long type;
2b17fa28	303	int off_reg, off_mask;
50a03e35 BG	304
50a03e35 BG	305	pdata = dev_get_platdata(dev);
33036f48 WY	306
	307	if (dev->of_node && !pdata) {
	308	const struct of_device_id *id;
33036f48 WY	309
	310	id = of_match_device(of_match_ptr(act8865_dt_ids), dev);
	311	if (!id)
	312	return -ENODEV;
	313
50a03e35 BG	314	type = (unsigned long) id->data;
	315	} else {
	316	type = i2c_id->driver_data;
	317	}
	318
	319	switch (type) {
ac0c0ea8	320	case ACT8846:
ac0c0ea8 BG	321	regulators = act8846_regulators;
ac0c0ea8 BG	322	num_regulators = ARRAY_SIZE(act8846_regulators);
2b17fa28 RP	323	off_reg = ACT8846_GLB_OFF_CTRL;
2b17fa28 RP	324	off_mask = ACT8846_OFF_SYSMASK;
ac0c0ea8	325	break;
50a03e35	326	case ACT8865:
50a03e35 BG	327	regulators = act8865_regulators;
50a03e35 BG	328	num_regulators = ARRAY_SIZE(act8865_regulators);
2b17fa28 RP	329	off_reg = ACT8865_SYS_CTRL;
2b17fa28 RP	330	off_mask = ACT8865_MSTROFF;
50a03e35 BG	331	break;
	332	default:
	333	dev_err(dev, "invalid device id %lu\n", type);
	334	return -EINVAL;
	335	}
	336
	337	of_node = devm_kzalloc(dev, sizeof(struct device_node )
	338	num_regulators, GFP_KERNEL);
	339	if (!of_node)
	340	return -ENOMEM;
	341
	342	if (dev->of_node && !pdata) {
34e0247f	343	ret = act8865_pdata_from_dt(dev, of_node, &pdata_of, type);
33036f48 WY	344	if (ret < 0)
	345	return ret;
	346
	347	pdata = &pdata_of;
	348	}
	349
50a03e35 BG	350	if (pdata->num_regulators > num_regulators) {
	351	dev_err(dev, "too many regulators: %d\n",
	352	pdata->num_regulators);
33036f48 WY	353	return -EINVAL;
	354	}
	355
f1de2c2f	356	act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL);
33036f48 WY	357	if (!act8865)
	358	return -ENOMEM;
	359
33036f48 WY	360	act8865->regmap = devm_regmap_init_i2c(client, &act8865_regmap_config);
33036f48 WY	361	if (IS_ERR(act8865->regmap)) {
40d3bc19	362	ret = PTR_ERR(act8865->regmap);
33036f48	363	dev_err(&client->dev, "Failed to allocate register map: %d\n",
40d3bc19 AL	364	ret);
40d3bc19 AL	365	return ret;
33036f48 WY	366	}
33036f48 WY	367
2b17fa28 RP	368	if (of_system_has_poweroff_source(dev->of_node)) {
	369	if (!pm_power_off) {
	370	act8865_i2c_client = client;
	371	act8865->off_reg = off_reg;
	372	act8865->off_mask = off_mask;
	373	pm_power_off = act8865_power_off;
	374	} else {
	375	dev_err(dev, "Failed to set poweroff capability, already defined\n");
	376	}
	377	}
	378
33036f48	379	/* Finally register devices */
50a03e35 BG	380	for (i = 0; i < num_regulators; i++) {
	381	const struct regulator_desc *desc = &regulators[i];
	382	struct regulator_config config = { };
	383	struct regulator_dev *rdev;
33036f48 WY	384
33036f48 WY	385	config.dev = dev;
48a1e1b5	386	config.init_data = act8865_get_init_data(desc->id, pdata);
33036f48 WY	387	config.of_node = of_node[i];
	388	config.driver_data = act8865;
	389	config.regmap = act8865->regmap;
	390
48a1e1b5	391	rdev = devm_regulator_register(&client->dev, desc, &config);
fb8eb454	392	if (IS_ERR(rdev)) {
48a1e1b5	393	dev_err(dev, "failed to register %s\n", desc->name);
fb8eb454	394	return PTR_ERR(rdev);
33036f48 WY	395	}
	396	}
	397
	398	i2c_set_clientdata(client, act8865);
50a03e35	399	devm_kfree(dev, of_node);
33036f48 WY	400
	401	return 0;
	402	}
	403
33036f48	404	static const struct i2c_device_id act8865_ids[] = {
ac0c0ea8	405	{ .name = "act8846", .driver_data = ACT8846 },
50a03e35	406	{ .name = "act8865", .driver_data = ACT8865 },
33036f48 WY	407	{ },
	408	};
	409	MODULE_DEVICE_TABLE(i2c, act8865_ids);
	410
	411	static struct i2c_driver act8865_pmic_driver = {
	412	.driver = {
	413	.name = "act8865",
	414	.owner = THIS_MODULE,
	415	},
	416	.probe = act8865_pmic_probe,
33036f48 WY	417	.id_table = act8865_ids,
	418	};
	419
	420	module_i2c_driver(act8865_pmic_driver);
	421
50a03e35	422	MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver");
33036f48 WY	423	MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
33036f48 WY	424	MODULE_LICENSE("GPL v2");