[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / regulator / tps6105x-regulator.c

/*
 * Driver for TPS61050/61052 boost converters, typically used for white LEDs
 * or audio amplifiers.
 *
 * Copyright (C) 2011 ST-Ericsson SA
 * Written on behalf of Linaro for ST-Ericsson
 *
 * Author: Linus Walleij <linus.walleij@linaro.org>
 *
 * License terms: GNU General Public License (GPL) version 2
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps6105x.h>

static const unsigned int tps6105x_voltages[] = {
	4500000,
	5000000,
	5250000,
	5000000, /* There is an additional 5V */
};

static int tps6105x_regulator_enable(struct regulator_dev *rdev)
{
	struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
	int ret;

	/* Activate voltage mode */
	ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
		TPS6105X_REG0_MODE_MASK,
		TPS6105X_REG0_MODE_VOLTAGE << TPS6105X_REG0_MODE_SHIFT);
	if (ret)
		return ret;

	return 0;
}

static int tps6105x_regulator_disable(struct regulator_dev *rdev)
{
	struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
	int ret;

	/* Set into shutdown mode */
	ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
		TPS6105X_REG0_MODE_MASK,
		TPS6105X_REG0_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
	if (ret)
		return ret;

	return 0;
}

static int tps6105x_regulator_is_enabled(struct regulator_dev *rdev)
{
	struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
	u8 regval;
	int ret;

	ret = tps6105x_get(tps6105x, TPS6105X_REG_0, &regval);
	if (ret)
		return ret;
	regval &= TPS6105X_REG0_MODE_MASK;
	regval >>= TPS6105X_REG0_MODE_SHIFT;

	if (regval == TPS6105X_REG0_MODE_VOLTAGE)
		return 1;

	return 0;
}

static int tps6105x_regulator_get_voltage_sel(struct regulator_dev *rdev)
{
	struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
	u8 regval;
	int ret;

	ret = tps6105x_get(tps6105x, TPS6105X_REG_0, &regval);
	if (ret)
		return ret;

	regval &= TPS6105X_REG0_VOLTAGE_MASK;
	regval >>= TPS6105X_REG0_VOLTAGE_SHIFT;
	return (int) regval;
}

static int tps6105x_regulator_set_voltage_sel(struct regulator_dev *rdev,
					      unsigned selector)
{
	struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
	int ret;

	ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
				    TPS6105X_REG0_VOLTAGE_MASK,
				    selector << TPS6105X_REG0_VOLTAGE_SHIFT);
	if (ret)
		return ret;

	return 0;
}

static struct regulator_ops tps6105x_regulator_ops = {
	.enable		= tps6105x_regulator_enable,
	.disable	= tps6105x_regulator_disable,
	.is_enabled	= tps6105x_regulator_is_enabled,
	.get_voltage_sel = tps6105x_regulator_get_voltage_sel,
	.set_voltage_sel = tps6105x_regulator_set_voltage_sel,
	.list_voltage	= regulator_list_voltage_table,
};

static const struct regulator_desc tps6105x_regulator_desc = {
	.name		= "tps6105x-boost",
	.ops		= &tps6105x_regulator_ops,
	.type		= REGULATOR_VOLTAGE,
	.id		= 0,
	.owner		= THIS_MODULE,
	.n_voltages	= ARRAY_SIZE(tps6105x_voltages),
	.volt_table	= tps6105x_voltages,
};

/*
 * Registers the chip as a voltage regulator
 */
static int tps6105x_regulator_probe(struct platform_device *pdev)
{
	struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
	struct tps6105x_platform_data *pdata = tps6105x->pdata;
	struct regulator_config config = { };
	int ret;

	/* This instance is not set for regulator mode so bail out */
	if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
		dev_info(&pdev->dev,
			 "chip not in voltage mode mode, exit probe \n");
		return 0;
	}

	config.dev = &tps6105x->client->dev;
	config.init_data = pdata->regulator_data;
	config.driver_data = tps6105x;

	/* Register regulator with framework */
	tps6105x->regulator = regulator_register(&tps6105x_regulator_desc,
						 &config);
	if (IS_ERR(tps6105x->regulator)) {
		ret = PTR_ERR(tps6105x->regulator);
		dev_err(&tps6105x->client->dev,
			"failed to register regulator\n");
		return ret;
	}
	platform_set_drvdata(pdev, tps6105x);

	return 0;
}

static int tps6105x_regulator_remove(struct platform_device *pdev)
{
	struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
	regulator_unregister(tps6105x->regulator);
	return 0;
}

static struct platform_driver tps6105x_regulator_driver = {
	.driver = {
		.name  = "tps6105x-regulator",
		.owner = THIS_MODULE,
	},
	.probe = tps6105x_regulator_probe,
	.remove = tps6105x_regulator_remove,
};

static __init int tps6105x_regulator_init(void)
{
	return platform_driver_register(&tps6105x_regulator_driver);
}
subsys_initcall(tps6105x_regulator_init);

static __exit void tps6105x_regulator_exit(void)
{
	platform_driver_unregister(&tps6105x_regulator_driver);
}
module_exit(tps6105x_regulator_exit);

MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
MODULE_DESCRIPTION("TPS6105x regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps6105x-regulator");
Commit	Line	Data
2edd3b69 LW	1	/*
	2	* Driver for TPS61050/61052 boost converters, typically used for white LEDs
	3	* or audio amplifiers.
	4	*
	5	* Copyright (C) 2011 ST-Ericsson SA
	6	* Written on behalf of Linaro for ST-Ericsson
	7	*
	8	* Author: Linus Walleij <linus.walleij@linaro.org>
	9	*
	10	* License terms: GNU General Public License (GPL) version 2
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/kernel.h>
	15	#include <linux/init.h>
	16	#include <linux/err.h>
	17	#include <linux/i2c.h>
	18	#include <linux/platform_device.h>
	19	#include <linux/regulator/driver.h>
	20	#include <linux/mfd/core.h>
	21	#include <linux/mfd/tps6105x.h>
	22
c55979b7	23	static const unsigned int tps6105x_voltages[] = {
2edd3b69 LW	24	4500000,
	25	5000000,
	26	5250000,
	27	5000000, /* There is an additional 5V */
	28	};
	29
	30	static int tps6105x_regulator_enable(struct regulator_dev *rdev)
	31	{
	32	struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
	33	int ret;
	34
	35	/* Activate voltage mode */
	36	ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
	37	TPS6105X_REG0_MODE_MASK,
	38	TPS6105X_REG0_MODE_VOLTAGE << TPS6105X_REG0_MODE_SHIFT);
	39	if (ret)
	40	return ret;
	41
	42	return 0;
	43	}
	44
	45	static int tps6105x_regulator_disable(struct regulator_dev *rdev)
	46	{
	47	struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
	48	int ret;
	49
	50	/* Set into shutdown mode */
	51	ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
	52	TPS6105X_REG0_MODE_MASK,
	53	TPS6105X_REG0_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
	54	if (ret)
	55	return ret;
	56
	57	return 0;
	58	}
	59
	60	static int tps6105x_regulator_is_enabled(struct regulator_dev *rdev)
	61	{
	62	struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
	63	u8 regval;
	64	int ret;
	65
	66	ret = tps6105x_get(tps6105x, TPS6105X_REG_0, &regval);
	67	if (ret)
	68	return ret;
	69	regval &= TPS6105X_REG0_MODE_MASK;
	70	regval >>= TPS6105X_REG0_MODE_SHIFT;
	71
	72	if (regval == TPS6105X_REG0_MODE_VOLTAGE)
	73	return 1;
	74
	75	return 0;
	76	}
	77
	78	static int tps6105x_regulator_get_voltage_sel(struct regulator_dev *rdev)
	79	{
	80	struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
	81	u8 regval;
	82	int ret;
	83
	84	ret = tps6105x_get(tps6105x, TPS6105X_REG_0, &regval);
	85	if (ret)
	86	return ret;
	87
88	regval &= TPS6105X_REG0_VOLTAGE_MASK;
89	regval >>= TPS6105X_REG0_VOLTAGE_SHIFT;
90	return (int) regval;
91	}
92
93	static int tps6105x_regulator_set_voltage_sel(struct regulator_dev *rdev,
94	unsigned selector)
95	{
96	struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
97	int ret;
98
99	ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
100	TPS6105X_REG0_VOLTAGE_MASK,
101	selector << TPS6105X_REG0_VOLTAGE_SHIFT);
102	if (ret)
103	return ret;
104
105	return 0;
106	}
107
2edd3b69 LW	108	static struct regulator_ops tps6105x_regulator_ops = {
	109	.enable = tps6105x_regulator_enable,
	110	.disable = tps6105x_regulator_disable,
	111	.is_enabled = tps6105x_regulator_is_enabled,
	112	.get_voltage_sel = tps6105x_regulator_get_voltage_sel,
	113	.set_voltage_sel = tps6105x_regulator_set_voltage_sel,
c55979b7	114	.list_voltage = regulator_list_voltage_table,
2edd3b69 LW	115	};
2edd3b69 LW	116
d882d73e	117	static const struct regulator_desc tps6105x_regulator_desc = {
2edd3b69 LW	118	.name = "tps6105x-boost",
	119	.ops = &tps6105x_regulator_ops,
	120	.type = REGULATOR_VOLTAGE,
	121	.id = 0,
	122	.owner = THIS_MODULE,
	123	.n_voltages = ARRAY_SIZE(tps6105x_voltages),
c55979b7	124	.volt_table = tps6105x_voltages,
2edd3b69 LW	125	};
	126
	127	/*
	128	* Registers the chip as a voltage regulator
	129	*/
a5023574	130	static int tps6105x_regulator_probe(struct platform_device *pdev)
2edd3b69	131	{
a7c98ce2	132	struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
2edd3b69	133	struct tps6105x_platform_data *pdata = tps6105x->pdata;
c172708d	134	struct regulator_config config = { };
2edd3b69 LW	135	int ret;
	136
	137	/* This instance is not set for regulator mode so bail out */
	138	if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
	139	dev_info(&pdev->dev,
	140	"chip not in voltage mode mode, exit probe \n");
	141	return 0;
	142	}
	143
c172708d MB	144	config.dev = &tps6105x->client->dev;
	145	config.init_data = pdata->regulator_data;
	146	config.driver_data = tps6105x;
	147
2edd3b69 LW	148	/* Register regulator with framework */
2edd3b69 LW	149	tps6105x->regulator = regulator_register(&tps6105x_regulator_desc,
c172708d	150	&config);
2edd3b69 LW	151	if (IS_ERR(tps6105x->regulator)) {
	152	ret = PTR_ERR(tps6105x->regulator);
	153	dev_err(&tps6105x->client->dev,
	154	"failed to register regulator\n");
	155	return ret;
	156	}
f0f060bd	157	platform_set_drvdata(pdev, tps6105x);
2edd3b69 LW	158
	159	return 0;
	160	}
	161
8dc995f5	162	static int tps6105x_regulator_remove(struct platform_device *pdev)
2edd3b69	163	{
a7c98ce2	164	struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
2edd3b69 LW	165	regulator_unregister(tps6105x->regulator);
	166	return 0;
	167	}
	168
	169	static struct platform_driver tps6105x_regulator_driver = {
	170	.driver = {
	171	.name = "tps6105x-regulator",
	172	.owner = THIS_MODULE,
	173	},
	174	.probe = tps6105x_regulator_probe,
5eb9f2b9	175	.remove = tps6105x_regulator_remove,
2edd3b69 LW	176	};
	177
	178	static __init int tps6105x_regulator_init(void)
	179	{
	180	return platform_driver_register(&tps6105x_regulator_driver);
	181	}
	182	subsys_initcall(tps6105x_regulator_init);
	183
	184	static __exit void tps6105x_regulator_exit(void)
	185	{
	186	platform_driver_unregister(&tps6105x_regulator_driver);
	187	}
	188	module_exit(tps6105x_regulator_exit);
	189
	190	MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
	191	MODULE_DESCRIPTION("TPS6105x regulator driver");
	192	MODULE_LICENSE("GPL v2");
	193	MODULE_ALIAS("platform:tps6105x-regulator");