drivers/regulator/act8865-regulator.c - kernel/msm-4.9 - Gitiles

 /*
  * 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>

 /*
  * ACT8600 Global Register Map.
  */
 #define ACT8600_SYS_MODE	0x00
 #define ACT8600_SYS_CTRL	0x01
 #define ACT8600_DCDC1_VSET	0x10
 #define ACT8600_DCDC1_CTRL	0x12
 #define ACT8600_DCDC2_VSET	0x20
 #define ACT8600_DCDC2_CTRL	0x22
 #define ACT8600_DCDC3_VSET	0x30
 #define ACT8600_DCDC3_CTRL	0x32
 #define ACT8600_SUDCDC4_VSET	0x40
 #define ACT8600_SUDCDC4_CTRL	0x41
 #define ACT8600_LDO5_VSET	0x50
 #define ACT8600_LDO5_CTRL	0x51
 #define ACT8600_LDO6_VSET	0x60
 #define ACT8600_LDO6_CTRL	0x61
 #define ACT8600_LDO7_VSET	0x70
 #define ACT8600_LDO7_CTRL	0x71
 #define ACT8600_LDO8_VSET	0x80
 #define ACT8600_LDO8_CTRL	0x81
 #define ACT8600_LDO910_CTRL	0x91
 #define ACT8600_APCH0		0xA1
 #define ACT8600_APCH1		0xA8
 #define ACT8600_APCH2		0xA9
 #define ACT8600_APCH_STAT	0xAA
 #define ACT8600_OTG0		0xB0
 #define ACT8600_OTG1		0xB2

 /*
  * 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] */


 #define ACT8600_LDO10_ENA		0x40	/* ON - [6] */
 #define ACT8600_SUDCDC_VSEL_MASK	0xFF	/* SUDCDC VSET - [7:0] */

 /*
  * ACT8865 voltage number
  */
 #define	ACT8865_VOLTAGE_NUM	64
 #define ACT8600_SUDCDC_VOLTAGE_NUM	255

 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 const struct regulator_linear_range act8600_sudcdc_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(3000000, 0, 63, 0),
 	REGULATOR_LINEAR_RANGE(3000000, 64, 159, 100000),
 	REGULATOR_LINEAR_RANGE(12600000, 160, 191, 200000),
 	REGULATOR_LINEAR_RANGE(19000000, 191, 255, 400000),
 };

 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,
 };

 static struct regulator_ops act8865_ldo_ops = {
 	.enable			= regulator_enable_regmap,
 	.disable		= regulator_disable_regmap,
 	.is_enabled		= regulator_is_enabled_regmap,
 };

 #define ACT88xx_REG(_name, _family, _id, _vsel_reg, _supply)		\
 	[_family##_ID_##_id] = {					\
 		.name			= _name,			\
 		.supply_name		= _supply,			\
 		.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 act8600_regulators[] = {
 	ACT88xx_REG("DCDC1", ACT8600, DCDC1, VSET, "vp1"),
 	ACT88xx_REG("DCDC2", ACT8600, DCDC2, VSET, "vp2"),
 	ACT88xx_REG("DCDC3", ACT8600, DCDC3, VSET, "vp3"),
 	{
 		.name = "SUDCDC_REG4",
 		.id = ACT8600_ID_SUDCDC4,
 		.ops = &act8865_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = ACT8600_SUDCDC_VOLTAGE_NUM,
 		.linear_ranges = act8600_sudcdc_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(act8600_sudcdc_voltage_ranges),
 		.vsel_reg = ACT8600_SUDCDC4_VSET,
 		.vsel_mask = ACT8600_SUDCDC_VSEL_MASK,
 		.enable_reg = ACT8600_SUDCDC4_CTRL,
 		.enable_mask = ACT8865_ENA,
 		.owner = THIS_MODULE,
 	},
 	ACT88xx_REG("LDO5", ACT8600, LDO5, VSET, "inl"),
 	ACT88xx_REG("LDO6", ACT8600, LDO6, VSET, "inl"),
 	ACT88xx_REG("LDO7", ACT8600, LDO7, VSET, "inl"),
 	ACT88xx_REG("LDO8", ACT8600, LDO8, VSET, "inl"),
 	{
 		.name = "LDO_REG9",
 		.id = ACT8600_ID_LDO9,
 		.ops = &act8865_ldo_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = 1,
 		.fixed_uV = 1800000,
 		.enable_reg = ACT8600_LDO910_CTRL,
 		.enable_mask = ACT8865_ENA,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "LDO_REG10",
 		.id = ACT8600_ID_LDO10,
 		.ops = &act8865_ldo_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = 1,
 		.fixed_uV = 1200000,
 		.enable_reg = ACT8600_LDO910_CTRL,
 		.enable_mask = ACT8600_LDO10_ENA,
 		.owner = THIS_MODULE,
 	},
 };

 static const struct regulator_desc act8846_regulators[] = {
 	ACT88xx_REG("REG1", ACT8846, REG1, VSET, "vp1"),
 	ACT88xx_REG("REG2", ACT8846, REG2, VSET0, "vp2"),
 	ACT88xx_REG("REG3", ACT8846, REG3, VSET0, "vp3"),
 	ACT88xx_REG("REG4", ACT8846, REG4, VSET0, "vp4"),
 	ACT88xx_REG("REG5", ACT8846, REG5, VSET, "inl1"),
 	ACT88xx_REG("REG6", ACT8846, REG6, VSET, "inl1"),
 	ACT88xx_REG("REG7", ACT8846, REG7, VSET, "inl1"),
 	ACT88xx_REG("REG8", ACT8846, REG8, VSET, "inl2"),
 	ACT88xx_REG("REG9", ACT8846, REG9, VSET, "inl2"),
 	ACT88xx_REG("REG10", ACT8846, REG10, VSET, "inl3"),
 	ACT88xx_REG("REG11", ACT8846, REG11, VSET, "inl3"),
 	ACT88xx_REG("REG12", ACT8846, REG12, VSET, "inl3"),
 };

 static const struct regulator_desc act8865_regulators[] = {
 	ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1, "vp1"),
 	ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1, "vp2"),
 	ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1, "vp3"),
 	ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
 	ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
 	ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
 	ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
 };

 static const struct regulator_desc act8865_alt_regulators[] = {
 	ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET2, "vp1"),
 	ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET2, "vp2"),
 	ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET2, "vp3"),
 	ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
 	ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
 	ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
 	ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
 };

 #ifdef CONFIG_OF
 static const struct of_device_id act8865_dt_ids[] = {
 	{ .compatible = "active-semi,act8600", .data = (void *)ACT8600 },
 	{ .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 struct of_regulator_match act8600_matches[] = {
 	[ACT8600_ID_DCDC1]	= { .name = "DCDC_REG1"},
 	[ACT8600_ID_DCDC2]	= { .name = "DCDC_REG2"},
 	[ACT8600_ID_DCDC3]	= { .name = "DCDC_REG3"},
 	[ACT8600_ID_SUDCDC4]	= { .name = "SUDCDC_REG4"},
 	[ACT8600_ID_LDO5]	= { .name = "LDO_REG5"},
 	[ACT8600_ID_LDO6]	= { .name = "LDO_REG6"},
 	[ACT8600_ID_LDO7]	= { .name = "LDO_REG7"},
 	[ACT8600_ID_LDO8]	= { .name = "LDO_REG8"},
 	[ACT8600_ID_LDO9]	= { .name = "LDO_REG9"},
 	[ACT8600_ID_LDO10]	= { .name = "LDO_REG10"},
 };

 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 ACT8600:
 		matches = act8600_matches;
 		num_matches = ARRAY_SIZE(act8600_matches);
 		break;
 	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;
 	int voltage_select = 0;

 	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;

 		voltage_select = !!of_get_property(dev->of_node,
 						   "active-semi,vsel-high",
 						   NULL);
 	} else {
 		type = i2c_id->driver_data;
 	}

 	switch (type) {
 	case ACT8600:
 		regulators = act8600_regulators;
 		num_regulators = ARRAY_SIZE(act8600_regulators);
 		off_reg = -1;
 		off_mask = -1;
 		break;
 	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:
 		if (voltage_select) {
 			regulators = act8865_alt_regulators;
 			num_regulators = ARRAY_SIZE(act8865_alt_regulators);
 		} else {
 			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_device_is_system_power_controller(dev->of_node)) {
 		if (!pm_power_off && (off_reg > 0)) {
 			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 = "act8600", .driver_data = ACT8600 },
 	{ .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",
 	},
 	.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");
	/*
	* 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>

	/*
	* ACT8600 Global Register Map.
	*/
	#define ACT8600_SYS_MODE 0x00
	#define ACT8600_SYS_CTRL 0x01
	#define ACT8600_DCDC1_VSET 0x10
	#define ACT8600_DCDC1_CTRL 0x12
	#define ACT8600_DCDC2_VSET 0x20
	#define ACT8600_DCDC2_CTRL 0x22
	#define ACT8600_DCDC3_VSET 0x30
	#define ACT8600_DCDC3_CTRL 0x32
	#define ACT8600_SUDCDC4_VSET 0x40
	#define ACT8600_SUDCDC4_CTRL 0x41
	#define ACT8600_LDO5_VSET 0x50
	#define ACT8600_LDO5_CTRL 0x51
	#define ACT8600_LDO6_VSET 0x60
	#define ACT8600_LDO6_CTRL 0x61
	#define ACT8600_LDO7_VSET 0x70
	#define ACT8600_LDO7_CTRL 0x71
	#define ACT8600_LDO8_VSET 0x80
	#define ACT8600_LDO8_CTRL 0x81
	#define ACT8600_LDO910_CTRL 0x91
	#define ACT8600_APCH0 0xA1
	#define ACT8600_APCH1 0xA8
	#define ACT8600_APCH2 0xA9
	#define ACT8600_APCH_STAT 0xAA
	#define ACT8600_OTG0 0xB0
	#define ACT8600_OTG1 0xB2

	/*
	* 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] */


	#define ACT8600_LDO10_ENA 0x40 /* ON - [6] */
	#define ACT8600_SUDCDC_VSEL_MASK 0xFF /* SUDCDC VSET - [7:0] */

	/*
	* ACT8865 voltage number
	*/
	#define ACT8865_VOLTAGE_NUM 64
	#define ACT8600_SUDCDC_VOLTAGE_NUM 255

	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 const struct regulator_linear_range act8600_sudcdc_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(3000000, 0, 63, 0),
	REGULATOR_LINEAR_RANGE(3000000, 64, 159, 100000),
	REGULATOR_LINEAR_RANGE(12600000, 160, 191, 200000),
	REGULATOR_LINEAR_RANGE(19000000, 191, 255, 400000),
	};

	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,
	};

	static struct regulator_ops act8865_ldo_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	};

	#define ACT88xx_REG(_name, _family, _id, _vsel_reg, _supply) \
	[_family##_ID_##_id] = { \
	.name = _name, \
	.supply_name = _supply, \
	.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 act8600_regulators[] = {
	ACT88xx_REG("DCDC1", ACT8600, DCDC1, VSET, "vp1"),
	ACT88xx_REG("DCDC2", ACT8600, DCDC2, VSET, "vp2"),
	ACT88xx_REG("DCDC3", ACT8600, DCDC3, VSET, "vp3"),
	{
	.name = "SUDCDC_REG4",
	.id = ACT8600_ID_SUDCDC4,
	.ops = &act8865_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = ACT8600_SUDCDC_VOLTAGE_NUM,
	.linear_ranges = act8600_sudcdc_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(act8600_sudcdc_voltage_ranges),
	.vsel_reg = ACT8600_SUDCDC4_VSET,
	.vsel_mask = ACT8600_SUDCDC_VSEL_MASK,
	.enable_reg = ACT8600_SUDCDC4_CTRL,
	.enable_mask = ACT8865_ENA,
	.owner = THIS_MODULE,
	},
	ACT88xx_REG("LDO5", ACT8600, LDO5, VSET, "inl"),
	ACT88xx_REG("LDO6", ACT8600, LDO6, VSET, "inl"),
	ACT88xx_REG("LDO7", ACT8600, LDO7, VSET, "inl"),
	ACT88xx_REG("LDO8", ACT8600, LDO8, VSET, "inl"),
	{
	.name = "LDO_REG9",
	.id = ACT8600_ID_LDO9,
	.ops = &act8865_ldo_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = 1,
	.fixed_uV = 1800000,
	.enable_reg = ACT8600_LDO910_CTRL,
	.enable_mask = ACT8865_ENA,
	.owner = THIS_MODULE,
	},
	{
	.name = "LDO_REG10",
	.id = ACT8600_ID_LDO10,
	.ops = &act8865_ldo_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = 1,
	.fixed_uV = 1200000,
	.enable_reg = ACT8600_LDO910_CTRL,
	.enable_mask = ACT8600_LDO10_ENA,
	.owner = THIS_MODULE,
	},
	};

	static const struct regulator_desc act8846_regulators[] = {
	ACT88xx_REG("REG1", ACT8846, REG1, VSET, "vp1"),
	ACT88xx_REG("REG2", ACT8846, REG2, VSET0, "vp2"),
	ACT88xx_REG("REG3", ACT8846, REG3, VSET0, "vp3"),
	ACT88xx_REG("REG4", ACT8846, REG4, VSET0, "vp4"),
	ACT88xx_REG("REG5", ACT8846, REG5, VSET, "inl1"),
	ACT88xx_REG("REG6", ACT8846, REG6, VSET, "inl1"),
	ACT88xx_REG("REG7", ACT8846, REG7, VSET, "inl1"),
	ACT88xx_REG("REG8", ACT8846, REG8, VSET, "inl2"),
	ACT88xx_REG("REG9", ACT8846, REG9, VSET, "inl2"),
	ACT88xx_REG("REG10", ACT8846, REG10, VSET, "inl3"),
	ACT88xx_REG("REG11", ACT8846, REG11, VSET, "inl3"),
	ACT88xx_REG("REG12", ACT8846, REG12, VSET, "inl3"),
	};

	static const struct regulator_desc act8865_regulators[] = {
	ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1, "vp1"),
	ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1, "vp2"),
	ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1, "vp3"),
	ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
	ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
	ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
	ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
	};

	static const struct regulator_desc act8865_alt_regulators[] = {
	ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET2, "vp1"),
	ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET2, "vp2"),
	ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET2, "vp3"),
	ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
	ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
	ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
	ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
	};

	#ifdef CONFIG_OF
	static const struct of_device_id act8865_dt_ids[] = {
	{ .compatible = "active-semi,act8600", .data = (void *)ACT8600 },
	{ .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 struct of_regulator_match act8600_matches[] = {
	[ACT8600_ID_DCDC1] = { .name = "DCDC_REG1"},
	[ACT8600_ID_DCDC2] = { .name = "DCDC_REG2"},
	[ACT8600_ID_DCDC3] = { .name = "DCDC_REG3"},
	[ACT8600_ID_SUDCDC4] = { .name = "SUDCDC_REG4"},
	[ACT8600_ID_LDO5] = { .name = "LDO_REG5"},
	[ACT8600_ID_LDO6] = { .name = "LDO_REG6"},
	[ACT8600_ID_LDO7] = { .name = "LDO_REG7"},
	[ACT8600_ID_LDO8] = { .name = "LDO_REG8"},
	[ACT8600_ID_LDO9] = { .name = "LDO_REG9"},
	[ACT8600_ID_LDO10] = { .name = "LDO_REG10"},
	};

	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 ACT8600:
	matches = act8600_matches;
	num_matches = ARRAY_SIZE(act8600_matches);
	break;
	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;
	int voltage_select = 0;

	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;

	voltage_select = !!of_get_property(dev->of_node,
	"active-semi,vsel-high",
	NULL);
	} else {
	type = i2c_id->driver_data;
	}

	switch (type) {
	case ACT8600:
	regulators = act8600_regulators;
	num_regulators = ARRAY_SIZE(act8600_regulators);
	off_reg = -1;
	off_mask = -1;
	break;
	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:
	if (voltage_select) {
	regulators = act8865_alt_regulators;
	num_regulators = ARRAY_SIZE(act8865_alt_regulators);
	} else {
	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_device_is_system_power_controller(dev->of_node)) {
	if (!pm_power_off && (off_reg > 0)) {
	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 = "act8600", .driver_data = ACT8600 },
	{ .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",
	},
	.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");