[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 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,
	.get_bypass = regulator_get_bypass_regmap,
	.set_bypass = regulator_set_bypass_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 = 6,

	.owner = THIS_MODULE,
};

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);
	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.
	 */
	ldo1->init_data = arizona_ldo1_default;
	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(&arizona_ldo1, &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
	37	static struct regulator_ops arizona_ldo1_ops = {
	38	.list_voltage = regulator_list_voltage_linear,
	39	.map_voltage = regulator_map_voltage_linear,
	40	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	41	.set_voltage_sel = regulator_set_voltage_sel_regmap,
9a17de04 MB	42	.get_bypass = regulator_get_bypass_regmap,
9a17de04 MB	43	.set_bypass = regulator_set_bypass_regmap,
1910efa1 MB	44	};
	45
	46	static const struct regulator_desc arizona_ldo1 = {
	47	.name = "LDO1",
	48	.supply_name = "LDOVDD",
	49	.type = REGULATOR_VOLTAGE,
	50	.ops = &arizona_ldo1_ops,
	51
	52	.vsel_reg = ARIZONA_LDO1_CONTROL_1,
	53	.vsel_mask = ARIZONA_LDO1_VSEL_MASK,
9a17de04 MB	54	.bypass_reg = ARIZONA_LDO1_CONTROL_1,
9a17de04 MB	55	.bypass_mask = ARIZONA_LDO1_BYPASS,
1910efa1 MB	56	.min_uV = 900000,
1910efa1 MB	57	.uV_step = 50000,
e96961da	58	.n_voltages = 6,
1910efa1 MB	59
	60	.owner = THIS_MODULE,
	61	};
	62
	63	static const struct regulator_init_data arizona_ldo1_default = {
a9905b1d MB	64	.constraints = {
	65	.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	66	},
1910efa1 MB	67	.num_consumer_supplies = 1,
	68	};
	69
a5023574	70	static int arizona_ldo1_probe(struct platform_device *pdev)
1910efa1 MB	71	{
	72	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	73	struct regulator_config config = { };
	74	struct arizona_ldo1 *ldo1;
	75	int ret;
	76
	77	ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
	78	if (ldo1 == NULL) {
	79	dev_err(&pdev->dev, "Unable to allocate private data\n");
	80	return -ENOMEM;
	81	}
	82
	83	ldo1->arizona = arizona;
	84
	85	/*
	86	* Since the chip usually supplies itself we provide some
	87	* default init_data for it. This will be overridden with
	88	* platform data if provided.
	89	*/
	90	ldo1->init_data = arizona_ldo1_default;
	91	ldo1->init_data.consumer_supplies = &ldo1->supply;
	92	ldo1->supply.supply = "DCVDD";
	93	ldo1->supply.dev_name = dev_name(arizona->dev);
	94
	95	config.dev = arizona->dev;
	96	config.driver_data = ldo1;
	97	config.regmap = arizona->regmap;
a9905b1d	98	config.ena_gpio = arizona->pdata.ldoena;
1910efa1 MB	99
	100	if (arizona->pdata.ldo1)
	101	config.init_data = arizona->pdata.ldo1;
	102	else
	103	config.init_data = &ldo1->init_data;
	104
	105	ldo1->regulator = regulator_register(&arizona_ldo1, &config);
	106	if (IS_ERR(ldo1->regulator)) {
	107	ret = PTR_ERR(ldo1->regulator);
	108	dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
	109	ret);
	110	return ret;
	111	}
	112
	113	platform_set_drvdata(pdev, ldo1);
	114
	115	return 0;
	116	}
	117
8dc995f5	118	static int arizona_ldo1_remove(struct platform_device *pdev)
1910efa1 MB	119	{
	120	struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);
	121
	122	regulator_unregister(ldo1->regulator);
	123
	124	return 0;
	125	}
	126
	127	static struct platform_driver arizona_ldo1_driver = {
	128	.probe = arizona_ldo1_probe,
5eb9f2b9	129	.remove = arizona_ldo1_remove,
1910efa1 MB	130	.driver = {
	131	.name = "arizona-ldo1",
	132	.owner = THIS_MODULE,
	133	},
	134	};
	135
	136	module_platform_driver(arizona_ldo1_driver);
	137
	138	/* Module information */
	139	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	140	MODULE_DESCRIPTION("Arizona LDO1 driver");
	141	MODULE_LICENSE("GPL");
	142	MODULE_ALIAS("platform:arizona-ldo1");