[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / regulator / arizona-ldo1.c

/*
 * arizona-ldo1.c  --  LDO1 supply for Arizona devices
 *
 * Copyright 2012 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 *  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/moduleparam.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/gpio.h>
#include <linux/slab.h>

#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>

struct arizona_ldo1 {
	struct regulator_dev *regulator;
	struct arizona *arizona;

	struct regulator_consumer_supply supply;
	struct regulator_init_data init_data;
};

static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev,
					unsigned int selector)
{
	if (selector >= rdev->desc->n_voltages)
		return -EINVAL;

	if (selector == rdev->desc->n_voltages - 1)
		return 1800000;
	else
		return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
}

static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev,
				       int min_uV, int max_uV)
{
	int sel;

	sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
	if (sel >= rdev->desc->n_voltages)
		sel = rdev->desc->n_voltages - 1;

	return sel;
}

static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
					   unsigned sel)
{
	struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
	struct regmap *regmap = ldo->arizona->regmap;
	unsigned int val;
	int ret;

	if (sel == rdev->desc->n_voltages - 1)
		val = ARIZONA_LDO1_HI_PWR;
	else
		val = 0;

	ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
				 ARIZONA_LDO1_HI_PWR, val);
	if (ret != 0)
		return ret;

	ret = regmap_update_bits(regmap, ARIZONA_DYNAMIC_FREQUENCY_SCALING_1,
				 ARIZONA_SUBSYS_MAX_FREQ, val);
	if (ret != 0)
		return ret;

	if (val)
		return 0;

	val = sel << ARIZONA_LDO1_VSEL_SHIFT;

	return regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_1,
				  ARIZONA_LDO1_VSEL_MASK, val);
}

static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
{
	struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
	struct regmap *regmap = ldo->arizona->regmap;
	unsigned int val;
	int ret;

	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
	if (ret != 0)
		return ret;

	if (val & ARIZONA_LDO1_HI_PWR)
		return rdev->desc->n_voltages - 1;

	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_1, &val);
	if (ret != 0)
		return ret;

	return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT;
}

static struct regulator_ops arizona_ldo1_hc_ops = {
	.list_voltage = arizona_ldo1_hc_list_voltage,
	.map_voltage = arizona_ldo1_hc_map_voltage,
	.get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
	.set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
	.get_bypass = regulator_get_bypass_regmap,
	.set_bypass = regulator_set_bypass_regmap,
};

static const struct regulator_desc arizona_ldo1_hc = {
	.name = "LDO1",
	.supply_name = "LDOVDD",
	.type = REGULATOR_VOLTAGE,
	.ops = &arizona_ldo1_hc_ops,

	.bypass_reg = ARIZONA_LDO1_CONTROL_1,
	.bypass_mask = ARIZONA_LDO1_BYPASS,
	.min_uV = 900000,
	.uV_step = 50000,
	.n_voltages = 8,
	.enable_time = 1500,

	.owner = THIS_MODULE,
};

static struct regulator_ops arizona_ldo1_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
};

static const struct regulator_desc arizona_ldo1 = {
	.name = "LDO1",
	.supply_name = "LDOVDD",
	.type = REGULATOR_VOLTAGE,
	.ops = &arizona_ldo1_ops,

	.vsel_reg = ARIZONA_LDO1_CONTROL_1,
	.vsel_mask = ARIZONA_LDO1_VSEL_MASK,
	.bypass_reg = ARIZONA_LDO1_CONTROL_1,
	.bypass_mask = ARIZONA_LDO1_BYPASS,
	.min_uV = 900000,
	.uV_step = 50000,
	.n_voltages = 7,
	.enable_time = 500,

	.owner = THIS_MODULE,
};

static const struct regulator_init_data arizona_ldo1_dvfs = {
	.constraints = {
		.min_uV = 1200000,
		.max_uV = 1800000,
		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
				  REGULATOR_CHANGE_VOLTAGE,
	},
	.num_consumer_supplies = 1,
};

static const struct regulator_init_data arizona_ldo1_default = {
	.constraints = {
		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	},
	.num_consumer_supplies = 1,
};

static int arizona_ldo1_probe(struct platform_device *pdev)
{
	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	const struct regulator_desc *desc;
	struct regulator_config config = { };
	struct arizona_ldo1 *ldo1;
	int ret;

	ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
	if (ldo1 == NULL) {
		dev_err(&pdev->dev, "Unable to allocate private data\n");
		return -ENOMEM;
	}

	ldo1->arizona = arizona;

	/*
	 * Since the chip usually supplies itself we provide some
	 * default init_data for it.  This will be overridden with
	 * platform data if provided.
	 */
	switch (arizona->type) {
	case WM5102:
		desc = &arizona_ldo1_hc;
		ldo1->init_data = arizona_ldo1_dvfs;
		break;
	default:
		desc = &arizona_ldo1;
		ldo1->init_data = arizona_ldo1_default;
		break;
	}

	ldo1->init_data.consumer_supplies = &ldo1->supply;
	ldo1->supply.supply = "DCVDD";
	ldo1->supply.dev_name = dev_name(arizona->dev);

	config.dev = arizona->dev;
	config.driver_data = ldo1;
	config.regmap = arizona->regmap;
	config.ena_gpio = arizona->pdata.ldoena;

	if (arizona->pdata.ldo1)
		config.init_data = arizona->pdata.ldo1;
	else
		config.init_data = &ldo1->init_data;

	ldo1->regulator = regulator_register(desc, &config);
	if (IS_ERR(ldo1->regulator)) {
		ret = PTR_ERR(ldo1->regulator);
		dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
			ret);
		return ret;
	}

	platform_set_drvdata(pdev, ldo1);

	return 0;
}

static int arizona_ldo1_remove(struct platform_device *pdev)
{
	struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);

	regulator_unregister(ldo1->regulator);

	return 0;
}

static struct platform_driver arizona_ldo1_driver = {
	.probe = arizona_ldo1_probe,
	.remove = arizona_ldo1_remove,
	.driver		= {
		.name	= "arizona-ldo1",
		.owner	= THIS_MODULE,
	},
};

module_platform_driver(arizona_ldo1_driver);

/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("Arizona LDO1 driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:arizona-ldo1");
Commit	Line	Data
1910efa1 MB	1	/*
	2	* arizona-ldo1.c -- LDO1 supply for Arizona devices
	3	*
	4	* Copyright 2012 Wolfson Microelectronics PLC.
	5	*
	6	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	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/moduleparam.h>
	16	#include <linux/init.h>
	17	#include <linux/bitops.h>
	18	#include <linux/err.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/regulator/driver.h>
	21	#include <linux/regulator/machine.h>
	22	#include <linux/gpio.h>
	23	#include <linux/slab.h>
	24
	25	#include <linux/mfd/arizona/core.h>
	26	#include <linux/mfd/arizona/pdata.h>
	27	#include <linux/mfd/arizona/registers.h>
	28
	29	struct arizona_ldo1 {
	30	struct regulator_dev *regulator;
	31	struct arizona *arizona;
	32
	33	struct regulator_consumer_supply supply;
	34	struct regulator_init_data init_data;
	35	};
	36
73ee2946 MB	37	static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev,
	38	unsigned int selector)
	39	{
	40	if (selector >= rdev->desc->n_voltages)
	41	return -EINVAL;
	42
	43	if (selector == rdev->desc->n_voltages - 1)
	44	return 1800000;
	45	else
	46	return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
	47	}
	48
	49	static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev,
	50	int min_uV, int max_uV)
	51	{
	52	int sel;
	53
	54	sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
	55	if (sel >= rdev->desc->n_voltages)
	56	sel = rdev->desc->n_voltages - 1;
	57
	58	return sel;
	59	}
	60
	61	static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
	62	unsigned sel)
	63	{
	64	struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
	65	struct regmap *regmap = ldo->arizona->regmap;
	66	unsigned int val;
	67	int ret;
	68
	69	if (sel == rdev->desc->n_voltages - 1)
	70	val = ARIZONA_LDO1_HI_PWR;
	71	else
	72	val = 0;
	73
	74	ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
	75	ARIZONA_LDO1_HI_PWR, val);
	76	if (ret != 0)
	77	return ret;
	78
	79	ret = regmap_update_bits(regmap, ARIZONA_DYNAMIC_FREQUENCY_SCALING_1,
	80	ARIZONA_SUBSYS_MAX_FREQ, val);
	81	if (ret != 0)
	82	return ret;
	83
	84	if (val)
	85	return 0;
	86
	87	val = sel << ARIZONA_LDO1_VSEL_SHIFT;
	88
	89	return regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_1,
	90	ARIZONA_LDO1_VSEL_MASK, val);
	91	}
	92
	93	static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
	94	{
	95	struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
	96	struct regmap *regmap = ldo->arizona->regmap;
	97	unsigned int val;
	98	int ret;
	99
	100	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
101	if (ret != 0)
102	return ret;
103
104	if (val & ARIZONA_LDO1_HI_PWR)
105	return rdev->desc->n_voltages - 1;
106
107	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_1, &val);
108	if (ret != 0)
109	return ret;
110
111	return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT;
112	}
113
114	static struct regulator_ops arizona_ldo1_hc_ops = {
115	.list_voltage = arizona_ldo1_hc_list_voltage,
116	.map_voltage = arizona_ldo1_hc_map_voltage,
117	.get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
118	.set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
119	.get_bypass = regulator_get_bypass_regmap,
120	.set_bypass = regulator_set_bypass_regmap,
121	};
122
123	static const struct regulator_desc arizona_ldo1_hc = {
124	.name = "LDO1",
125	.supply_name = "LDOVDD",
126	.type = REGULATOR_VOLTAGE,
127	.ops = &arizona_ldo1_hc_ops,
128
129	.bypass_reg = ARIZONA_LDO1_CONTROL_1,
130	.bypass_mask = ARIZONA_LDO1_BYPASS,
131	.min_uV = 900000,
132	.uV_step = 50000,
133	.n_voltages = 8,
ce1bcb7e	134	.enable_time = 1500,
73ee2946 MB	135
	136	.owner = THIS_MODULE,
	137	};
	138
1910efa1 MB	139	static struct regulator_ops arizona_ldo1_ops = {
	140	.list_voltage = regulator_list_voltage_linear,
	141	.map_voltage = regulator_map_voltage_linear,
	142	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	143	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	144	};
	145
	146	static const struct regulator_desc arizona_ldo1 = {
	147	.name = "LDO1",
	148	.supply_name = "LDOVDD",
	149	.type = REGULATOR_VOLTAGE,
	150	.ops = &arizona_ldo1_ops,
	151
	152	.vsel_reg = ARIZONA_LDO1_CONTROL_1,
	153	.vsel_mask = ARIZONA_LDO1_VSEL_MASK,
9a17de04 MB	154	.bypass_reg = ARIZONA_LDO1_CONTROL_1,
9a17de04 MB	155	.bypass_mask = ARIZONA_LDO1_BYPASS,
1910efa1 MB	156	.min_uV = 900000,
1910efa1 MB	157	.uV_step = 50000,
8a7f0c61	158	.n_voltages = 7,
86a14501	159	.enable_time = 500,
1910efa1 MB	160
	161	.owner = THIS_MODULE,
	162	};
	163
55a18aef MB	164	static const struct regulator_init_data arizona_ldo1_dvfs = {
	165	.constraints = {
	166	.min_uV = 1200000,
	167	.max_uV = 1800000,
	168	.valid_ops_mask = REGULATOR_CHANGE_STATUS \|
	169	REGULATOR_CHANGE_VOLTAGE,
	170	},
	171	.num_consumer_supplies = 1,
	172	};
	173
1910efa1	174	static const struct regulator_init_data arizona_ldo1_default = {
a9905b1d MB	175	.constraints = {
	176	.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	177	},
1910efa1 MB	178	.num_consumer_supplies = 1,
	179	};
	180
a5023574	181	static int arizona_ldo1_probe(struct platform_device *pdev)
1910efa1 MB	182	{
1910efa1 MB	183	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
73ee2946	184	const struct regulator_desc *desc;
1910efa1 MB	185	struct regulator_config config = { };
	186	struct arizona_ldo1 *ldo1;
	187	int ret;
	188
	189	ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
	190	if (ldo1 == NULL) {
	191	dev_err(&pdev->dev, "Unable to allocate private data\n");
	192	return -ENOMEM;
	193	}
	194
	195	ldo1->arizona = arizona;
	196
	197	/*
	198	* Since the chip usually supplies itself we provide some
	199	* default init_data for it. This will be overridden with
	200	* platform data if provided.
	201	*/
55a18aef MB	202	switch (arizona->type) {
55a18aef MB	203	case WM5102:
73ee2946	204	desc = &arizona_ldo1_hc;
55a18aef MB	205	ldo1->init_data = arizona_ldo1_dvfs;
	206	break;
	207	default:
73ee2946	208	desc = &arizona_ldo1;
55a18aef MB	209	ldo1->init_data = arizona_ldo1_default;
	210	break;
	211	}
	212
1910efa1 MB	213	ldo1->init_data.consumer_supplies = &ldo1->supply;
	214	ldo1->supply.supply = "DCVDD";
	215	ldo1->supply.dev_name = dev_name(arizona->dev);
	216
	217	config.dev = arizona->dev;
	218	config.driver_data = ldo1;
	219	config.regmap = arizona->regmap;
a9905b1d	220	config.ena_gpio = arizona->pdata.ldoena;
1910efa1 MB	221
	222	if (arizona->pdata.ldo1)
	223	config.init_data = arizona->pdata.ldo1;
	224	else
	225	config.init_data = &ldo1->init_data;
	226
73ee2946	227	ldo1->regulator = regulator_register(desc, &config);
1910efa1 MB	228	if (IS_ERR(ldo1->regulator)) {
	229	ret = PTR_ERR(ldo1->regulator);
	230	dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
	231	ret);
	232	return ret;
	233	}
	234
	235	platform_set_drvdata(pdev, ldo1);
	236
	237	return 0;
	238	}
	239
8dc995f5	240	static int arizona_ldo1_remove(struct platform_device *pdev)
1910efa1 MB	241	{
	242	struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);
	243
	244	regulator_unregister(ldo1->regulator);
	245
	246	return 0;
	247	}
	248
	249	static struct platform_driver arizona_ldo1_driver = {
	250	.probe = arizona_ldo1_probe,
5eb9f2b9	251	.remove = arizona_ldo1_remove,
1910efa1 MB	252	.driver = {
	253	.name = "arizona-ldo1",
	254	.owner = THIS_MODULE,
	255	},
	256	};
	257
	258	module_platform_driver(arizona_ldo1_driver);
	259
	260	/* Module information */
	261	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	262	MODULE_DESCRIPTION("Arizona LDO1 driver");
	263	MODULE_LICENSE("GPL");
	264	MODULE_ALIAS("platform:arizona-ldo1");