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

/*
 * arizona-micsupp.c  --  Microphone 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>

#define ARIZONA_MICSUPP_MAX_SELECTOR 0x1f

struct arizona_micsupp {
	struct regulator_dev *regulator;
	struct arizona *arizona;

	struct regulator_consumer_supply supply;
	struct regulator_init_data init_data;
};

static int arizona_micsupp_list_voltage(struct regulator_dev *rdev,
					unsigned int selector)
{
	if (selector > ARIZONA_MICSUPP_MAX_SELECTOR)
		return -EINVAL;

	if (selector == ARIZONA_MICSUPP_MAX_SELECTOR)
		return 3300000;
	else
		return (selector * 50000) + 1700000;
}

static int arizona_micsupp_map_voltage(struct regulator_dev *rdev,
				       int min_uV, int max_uV)
{
	unsigned int voltage;
	int selector;

	if (min_uV < 1700000)
		min_uV = 1700000;

	if (min_uV > 3200000)
		selector = ARIZONA_MICSUPP_MAX_SELECTOR;
	else
		selector = DIV_ROUND_UP(min_uV - 1700000, 50000);

	if (selector < 0)
		return -EINVAL;

	voltage = arizona_micsupp_list_voltage(rdev, selector);
	if (voltage < min_uV || voltage > max_uV)
		return -EINVAL;

	return selector;
}

static struct regulator_ops arizona_micsupp_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,

	.list_voltage = arizona_micsupp_list_voltage,
	.map_voltage = arizona_micsupp_map_voltage,

	.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_micsupp = {
	.name = "MICVDD",
	.supply_name = "CPVDD",
	.type = REGULATOR_VOLTAGE,
	.n_voltages = ARIZONA_MICSUPP_MAX_SELECTOR + 1,
	.ops = &arizona_micsupp_ops,

	.vsel_reg = ARIZONA_LDO2_CONTROL_1,
	.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
	.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
	.enable_mask = ARIZONA_CPMIC_ENA,
	.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
	.bypass_mask = ARIZONA_CPMIC_BYPASS,

	.owner = THIS_MODULE,
};

static const struct regulator_init_data arizona_micsupp_default = {
	.constraints = {
		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
				REGULATOR_CHANGE_VOLTAGE,
		.min_uV = 1700000,
		.max_uV = 3300000,
	},

	.num_consumer_supplies = 1,
};

static __devinit int arizona_micsupp_probe(struct platform_device *pdev)
{
	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	struct regulator_config config = { };
	struct arizona_micsupp *micsupp;
	int ret;

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

	micsupp->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.
	 */
	micsupp->init_data = arizona_micsupp_default;
	micsupp->init_data.consumer_supplies = &micsupp->supply;
	micsupp->supply.supply = "MICVDD";
	micsupp->supply.dev_name = dev_name(arizona->dev);

	config.dev = arizona->dev;
	config.driver_data = micsupp;
	config.regmap = arizona->regmap;

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

	/* Default to regulated mode until the API supports bypass */
	regmap_update_bits(arizona->regmap, ARIZONA_MIC_CHARGE_PUMP_1,
			   ARIZONA_CPMIC_BYPASS, 0);

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

	platform_set_drvdata(pdev, micsupp);

	return 0;
}

static __devexit int arizona_micsupp_remove(struct platform_device *pdev)
{
	struct arizona_micsupp *micsupp = platform_get_drvdata(pdev);

	regulator_unregister(micsupp->regulator);

	return 0;
}

static struct platform_driver arizona_micsupp_driver = {
	.probe = arizona_micsupp_probe,
	.remove = arizona_micsupp_remove,
	.driver		= {
		.name	= "arizona-micsupp",
		.owner	= THIS_MODULE,
	},
};

module_platform_driver(arizona_micsupp_driver);

/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("Arizona microphone supply driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:arizona-micsupp");
Commit	Line	Data
b667a45d MB	1	/*
	2	* arizona-micsupp.c -- Microphone 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	#define ARIZONA_MICSUPP_MAX_SELECTOR 0x1f
	30
	31	struct arizona_micsupp {
	32	struct regulator_dev *regulator;
	33	struct arizona *arizona;
	34
	35	struct regulator_consumer_supply supply;
	36	struct regulator_init_data init_data;
	37	};
	38
	39	static int arizona_micsupp_list_voltage(struct regulator_dev *rdev,
	40	unsigned int selector)
	41	{
	42	if (selector > ARIZONA_MICSUPP_MAX_SELECTOR)
	43	return -EINVAL;
	44
	45	if (selector == ARIZONA_MICSUPP_MAX_SELECTOR)
	46	return 3300000;
	47	else
	48	return (selector * 50000) + 1700000;
	49	}
	50
	51	static int arizona_micsupp_map_voltage(struct regulator_dev *rdev,
	52	int min_uV, int max_uV)
	53	{
	54	unsigned int voltage;
	55	int selector;
	56
	57	if (min_uV < 1700000)
	58	min_uV = 1700000;
	59
7f217d36	60	if (min_uV > 3200000)
b667a45d MB	61	selector = ARIZONA_MICSUPP_MAX_SELECTOR;
	62	else
	63	selector = DIV_ROUND_UP(min_uV - 1700000, 50000);
	64
	65	if (selector < 0)
	66	return -EINVAL;
	67
	68	voltage = arizona_micsupp_list_voltage(rdev, selector);
	69	if (voltage < min_uV \|\| voltage > max_uV)
	70	return -EINVAL;
	71
	72	return selector;
	73	}
	74
	75	static struct regulator_ops arizona_micsupp_ops = {
	76	.enable = regulator_enable_regmap,
	77	.disable = regulator_disable_regmap,
	78	.is_enabled = regulator_is_enabled_regmap,
	79
	80	.list_voltage = arizona_micsupp_list_voltage,
	81	.map_voltage = arizona_micsupp_map_voltage,
	82
	83	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	84	.set_voltage_sel = regulator_set_voltage_sel_regmap,
e477ce07 MB	85
	86	.get_bypass = regulator_get_bypass_regmap,
	87	.set_bypass = regulator_set_bypass_regmap,
b667a45d MB	88	};
	89
	90	static const struct regulator_desc arizona_micsupp = {
	91	.name = "MICVDD",
	92	.supply_name = "CPVDD",
	93	.type = REGULATOR_VOLTAGE,
	94	.n_voltages = ARIZONA_MICSUPP_MAX_SELECTOR + 1,
	95	.ops = &arizona_micsupp_ops,
	96
	97	.vsel_reg = ARIZONA_LDO2_CONTROL_1,
	98	.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
	99	.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
	100	.enable_mask = ARIZONA_CPMIC_ENA,
e477ce07 MB	101	.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
e477ce07 MB	102	.bypass_mask = ARIZONA_CPMIC_BYPASS,
b667a45d MB	103
	104	.owner = THIS_MODULE,
	105	};
	106
	107	static const struct regulator_init_data arizona_micsupp_default = {
	108	.constraints = {
	109	.valid_ops_mask = REGULATOR_CHANGE_STATUS \|
	110	REGULATOR_CHANGE_VOLTAGE,
	111	.min_uV = 1700000,
	112	.max_uV = 3300000,
	113	},
	114
	115	.num_consumer_supplies = 1,
	116	};
	117
	118	static __devinit int arizona_micsupp_probe(struct platform_device *pdev)
	119	{
	120	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	121	struct regulator_config config = { };
	122	struct arizona_micsupp *micsupp;
	123	int ret;
	124
	125	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
	126	if (micsupp == NULL) {
	127	dev_err(&pdev->dev, "Unable to allocate private data\n");
	128	return -ENOMEM;
	129	}
	130
	131	micsupp->arizona = arizona;
	132
	133	/*
	134	* Since the chip usually supplies itself we provide some
	135	* default init_data for it. This will be overridden with
	136	* platform data if provided.
	137	*/
	138	micsupp->init_data = arizona_micsupp_default;
	139	micsupp->init_data.consumer_supplies = &micsupp->supply;
	140	micsupp->supply.supply = "MICVDD";
	141	micsupp->supply.dev_name = dev_name(arizona->dev);
	142
	143	config.dev = arizona->dev;
	144	config.driver_data = micsupp;
	145	config.regmap = arizona->regmap;
	146
	147	if (arizona->pdata.micvdd)
	148	config.init_data = arizona->pdata.micvdd;
	149	else
	150	config.init_data = &micsupp->init_data;
	151
6dc027c9 MB	152	/* Default to regulated mode until the API supports bypass */
	153	regmap_update_bits(arizona->regmap, ARIZONA_MIC_CHARGE_PUMP_1,
	154	ARIZONA_CPMIC_BYPASS, 0);
	155
b667a45d MB	156	micsupp->regulator = regulator_register(&arizona_micsupp, &config);
	157	if (IS_ERR(micsupp->regulator)) {
	158	ret = PTR_ERR(micsupp->regulator);
	159	dev_err(arizona->dev, "Failed to register mic supply: %d\n",
	160	ret);
	161	return ret;
	162	}
	163
	164	platform_set_drvdata(pdev, micsupp);
	165
	166	return 0;
	167	}
	168
	169	static __devexit int arizona_micsupp_remove(struct platform_device *pdev)
	170	{
	171	struct arizona_micsupp *micsupp = platform_get_drvdata(pdev);
	172
	173	regulator_unregister(micsupp->regulator);
	174
	175	return 0;
	176	}
	177
	178	static struct platform_driver arizona_micsupp_driver = {
	179	.probe = arizona_micsupp_probe,
5eb9f2b9	180	.remove = arizona_micsupp_remove,
b667a45d MB	181	.driver = {
	182	.name = "arizona-micsupp",
	183	.owner = THIS_MODULE,
	184	},
	185	};
	186
	187	module_platform_driver(arizona_micsupp_driver);
	188
	189	/* Module information */
	190	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	191	MODULE_DESCRIPTION("Arizona microphone supply driver");
	192	MODULE_LICENSE("GPL");
	193	MODULE_ALIAS("platform:arizona-micsupp");