[linux-2.6-block.git] / drivers / regulator / mt6311-regulator.c

// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2015 MediaTek Inc.
// Author: Henry Chen <henryc.chen@mediatek.com>

#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/mt6311.h>
#include <linux/slab.h>
#include "mt6311-regulator.h"

static const struct regmap_config mt6311_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = MT6311_FQMTR_CON4,
	.cache_type = REGCACHE_RBTREE,
};

/* Default limits measured in millivolts and milliamps */
#define MT6311_MIN_UV		600000
#define MT6311_MAX_UV		1393750
#define MT6311_STEP_UV		6250

static const struct regulator_ops mt6311_buck_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
};

static const struct regulator_ops mt6311_ldo_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
};

#define MT6311_BUCK(_id) \
{\
	.name = #_id,\
	.ops = &mt6311_buck_ops,\
	.of_match = of_match_ptr(#_id),\
	.regulators_node = of_match_ptr("regulators"),\
	.type = REGULATOR_VOLTAGE,\
	.id = MT6311_ID_##_id,\
	.n_voltages = (MT6311_MAX_UV - MT6311_MIN_UV) / MT6311_STEP_UV + 1,\
	.min_uV = MT6311_MIN_UV,\
	.uV_step = MT6311_STEP_UV,\
	.owner = THIS_MODULE,\
	.enable_reg = MT6311_VDVFS11_CON9,\
	.enable_mask = MT6311_PMIC_VDVFS11_EN_MASK,\
	.vsel_reg = MT6311_VDVFS11_CON12,\
	.vsel_mask = MT6311_PMIC_VDVFS11_VOSEL_MASK,\
}

#define MT6311_LDO(_id) \
{\
	.name = #_id,\
	.ops = &mt6311_ldo_ops,\
	.of_match = of_match_ptr(#_id),\
	.regulators_node = of_match_ptr("regulators"),\
	.type = REGULATOR_VOLTAGE,\
	.id = MT6311_ID_##_id,\
	.owner = THIS_MODULE,\
	.enable_reg = MT6311_LDO_CON3,\
	.enable_mask = MT6311_PMIC_RG_VBIASN_EN_MASK,\
}

static const struct regulator_desc mt6311_regulators[] = {
	MT6311_BUCK(VDVFS),
	MT6311_LDO(VBIASN),
};

/*
 * I2C driver interface functions
 */
static int mt6311_i2c_probe(struct i2c_client *i2c,
		const struct i2c_device_id *id)
{
	struct regulator_config config = { };
	struct regulator_dev *rdev;
	struct regmap *regmap;
	int i, ret;
	unsigned int data;

	regmap = devm_regmap_init_i2c(i2c, &mt6311_regmap_config);
	if (IS_ERR(regmap)) {
		ret = PTR_ERR(regmap);
		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	ret = regmap_read(regmap, MT6311_SWCID, &data);
	if (ret < 0) {
		dev_err(&i2c->dev, "Failed to read DEVICE_ID reg: %d\n", ret);
		return ret;
	}

	switch (data) {
	case MT6311_E1_CID_CODE:
	case MT6311_E2_CID_CODE:
	case MT6311_E3_CID_CODE:
		break;
	default:
		dev_err(&i2c->dev, "Unsupported device id = 0x%x.\n", data);
		return -ENODEV;
	}

	for (i = 0; i < MT6311_MAX_REGULATORS; i++) {
		config.dev = &i2c->dev;
		config.regmap = regmap;

		rdev = devm_regulator_register(&i2c->dev,
			&mt6311_regulators[i], &config);
		if (IS_ERR(rdev)) {
			dev_err(&i2c->dev,
				"Failed to register MT6311 regulator\n");
			return PTR_ERR(rdev);
		}
	}

	return 0;
}

static const struct i2c_device_id mt6311_i2c_id[] = {
	{"mt6311", 0},
	{},
};
MODULE_DEVICE_TABLE(i2c, mt6311_i2c_id);

#ifdef CONFIG_OF
static const struct of_device_id mt6311_dt_ids[] = {
	{ .compatible = "mediatek,mt6311-regulator",
	  .data = &mt6311_i2c_id[0] },
	{},
};
MODULE_DEVICE_TABLE(of, mt6311_dt_ids);
#endif

static struct i2c_driver mt6311_regulator_driver = {
	.driver = {
		.name = "mt6311",
		.of_match_table = of_match_ptr(mt6311_dt_ids),
	},
	.probe = mt6311_i2c_probe,
	.id_table = mt6311_i2c_id,
};

module_i2c_driver(mt6311_regulator_driver);

MODULE_AUTHOR("Henry Chen <henryc.chen@mediatek.com>");
MODULE_DESCRIPTION("Regulator device driver for Mediatek MT6311");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
fe669cb9 AL	1	// SPDX-License-Identifier: GPL-2.0
	2	//
	3	// Copyright (c) 2015 MediaTek Inc.
	4	// Author: Henry Chen <henryc.chen@mediatek.com>
8766018b HC	5
	6	#include <linux/err.h>
	7	#include <linux/gpio.h>
	8	#include <linux/i2c.h>
	9	#include <linux/init.h>
	10	#include <linux/interrupt.h>
	11	#include <linux/module.h>
	12	#include <linux/regmap.h>
	13	#include <linux/regulator/driver.h>
	14	#include <linux/regulator/machine.h>
	15	#include <linux/regulator/of_regulator.h>
	16	#include <linux/regulator/mt6311.h>
	17	#include <linux/slab.h>
	18	#include "mt6311-regulator.h"
	19
	20	static const struct regmap_config mt6311_regmap_config = {
	21	.reg_bits = 8,
	22	.val_bits = 8,
	23	.max_register = MT6311_FQMTR_CON4,
47769cbc	24	.cache_type = REGCACHE_RBTREE,
8766018b HC	25	};
	26
	27	/* Default limits measured in millivolts and milliamps */
	28	#define MT6311_MIN_UV 600000
53e38162	29	#define MT6311_MAX_UV 1393750
8766018b HC	30	#define MT6311_STEP_UV 6250
8766018b HC	31
08b472f7	32	static const struct regulator_ops mt6311_buck_ops = {
a661b1d9 AL	33	.list_voltage = regulator_list_voltage_linear,
a661b1d9 AL	34	.map_voltage = regulator_map_voltage_linear,
8766018b HC	35	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	36	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	37	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	38	.enable = regulator_enable_regmap,
	39	.disable = regulator_disable_regmap,
	40	.is_enabled = regulator_is_enabled_regmap,
	41	};
	42
08b472f7	43	static const struct regulator_ops mt6311_ldo_ops = {
8766018b HC	44	.enable = regulator_enable_regmap,
	45	.disable = regulator_disable_regmap,
	46	.is_enabled = regulator_is_enabled_regmap,
	47	};
	48
	49	#define MT6311_BUCK(_id) \
	50	{\
	51	.name = #_id,\
	52	.ops = &mt6311_buck_ops,\
	53	.of_match = of_match_ptr(#_id),\
	54	.regulators_node = of_match_ptr("regulators"),\
	55	.type = REGULATOR_VOLTAGE,\
	56	.id = MT6311_ID_##_id,\
	57	.n_voltages = (MT6311_MAX_UV - MT6311_MIN_UV) / MT6311_STEP_UV + 1,\
	58	.min_uV = MT6311_MIN_UV,\
	59	.uV_step = MT6311_STEP_UV,\
	60	.owner = THIS_MODULE,\
8766018b HC	61	.enable_reg = MT6311_VDVFS11_CON9,\
	62	.enable_mask = MT6311_PMIC_VDVFS11_EN_MASK,\
	63	.vsel_reg = MT6311_VDVFS11_CON12,\
	64	.vsel_mask = MT6311_PMIC_VDVFS11_VOSEL_MASK,\
	65	}
	66
	67	#define MT6311_LDO(_id) \
	68	{\
	69	.name = #_id,\
	70	.ops = &mt6311_ldo_ops,\
	71	.of_match = of_match_ptr(#_id),\
	72	.regulators_node = of_match_ptr("regulators"),\
	73	.type = REGULATOR_VOLTAGE,\
	74	.id = MT6311_ID_##_id,\
	75	.owner = THIS_MODULE,\
	76	.enable_reg = MT6311_LDO_CON3,\
	77	.enable_mask = MT6311_PMIC_RG_VBIASN_EN_MASK,\
	78	}
	79
08b472f7	80	static const struct regulator_desc mt6311_regulators[] = {
8766018b HC	81	MT6311_BUCK(VDVFS),
	82	MT6311_LDO(VBIASN),
	83	};
	84
	85	/*
	86	* I2C driver interface functions
	87	*/
	88	static int mt6311_i2c_probe(struct i2c_client *i2c,
	89	const struct i2c_device_id *id)
	90	{
	91	struct regulator_config config = { };
	92	struct regulator_dev *rdev;
	93	struct regmap *regmap;
08b472f7	94	int i, ret;
8766018b HC	95	unsigned int data;
	96
	97	regmap = devm_regmap_init_i2c(i2c, &mt6311_regmap_config);
	98	if (IS_ERR(regmap)) {
08b472f7	99	ret = PTR_ERR(regmap);
8766018b	100	dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
08b472f7 AL	101	ret);
08b472f7 AL	102	return ret;
8766018b HC	103	}
	104
	105	ret = regmap_read(regmap, MT6311_SWCID, &data);
	106	if (ret < 0) {
	107	dev_err(&i2c->dev, "Failed to read DEVICE_ID reg: %d\n", ret);
	108	return ret;
	109	}
	110
	111	switch (data) {
	112	case MT6311_E1_CID_CODE:
	113	case MT6311_E2_CID_CODE:
	114	case MT6311_E3_CID_CODE:
	115	break;
	116	default:
	117	dev_err(&i2c->dev, "Unsupported device id = 0x%x.\n", data);
	118	return -ENODEV;
	119	}
	120
	121	for (i = 0; i < MT6311_MAX_REGULATORS; i++) {
	122	config.dev = &i2c->dev;
	123	config.regmap = regmap;
	124
	125	rdev = devm_regulator_register(&i2c->dev,
	126	&mt6311_regulators[i], &config);
	127	if (IS_ERR(rdev)) {
	128	dev_err(&i2c->dev,
	129	"Failed to register MT6311 regulator\n");
	130	return PTR_ERR(rdev);
	131	}
	132	}
	133
	134	return 0;
	135	}
	136
	137	static const struct i2c_device_id mt6311_i2c_id[] = {
	138	{"mt6311", 0},
	139	{},
	140	};
	141	MODULE_DEVICE_TABLE(i2c, mt6311_i2c_id);
	142
	143	#ifdef CONFIG_OF
	144	static const struct of_device_id mt6311_dt_ids[] = {
	145	{ .compatible = "mediatek,mt6311-regulator",
	146	.data = &mt6311_i2c_id[0] },
	147	{},
	148	};
	149	MODULE_DEVICE_TABLE(of, mt6311_dt_ids);
	150	#endif
	151
	152	static struct i2c_driver mt6311_regulator_driver = {
	153	.driver = {
	154	.name = "mt6311",
8766018b HC	155	.of_match_table = of_match_ptr(mt6311_dt_ids),
	156	},
	157	.probe = mt6311_i2c_probe,
	158	.id_table = mt6311_i2c_id,
	159	};
	160
	161	module_i2c_driver(mt6311_regulator_driver);
	162
	163	MODULE_AUTHOR("Henry Chen <henryc.chen@mediatek.com>");
	164	MODULE_DESCRIPTION("Regulator device driver for Mediatek MT6311");
	165	MODULE_LICENSE("GPL v2");