[deliverable/linux.git] / drivers / regulator / wm8994-regulator.c

/*
 * wm8994-regulator.c  --  Regulator driver for the WM8994
 *
 * Copyright 2009 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/gpio.h>
#include <linux/slab.h>

#include <linux/mfd/wm8994/core.h>
#include <linux/mfd/wm8994/registers.h>
#include <linux/mfd/wm8994/pdata.h>

struct wm8994_ldo {
	struct regulator_dev *regulator;
	struct wm8994 *wm8994;
};

#define WM8994_LDO1_MAX_SELECTOR 0x7
#define WM8994_LDO2_MAX_SELECTOR 0x3

static struct regulator_ops wm8994_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 int wm8994_ldo2_list_voltage(struct regulator_dev *rdev,
				    unsigned int selector)
{
	struct wm8994_ldo *ldo = rdev_get_drvdata(rdev);

	if (selector > WM8994_LDO2_MAX_SELECTOR)
		return -EINVAL;

	switch (ldo->wm8994->type) {
	case WM8994:
		return (selector * 100000) + 900000;
	case WM8958:
		return (selector * 100000) + 1000000;
	case WM1811:
		switch (selector) {
		case 0:
			return -EINVAL;
		default:
			return (selector * 100000) + 950000;
		}
		break;
	default:
		return -EINVAL;
	}
}

static struct regulator_ops wm8994_ldo2_ops = {
	.list_voltage = wm8994_ldo2_list_voltage,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
};

static const struct regulator_desc wm8994_ldo_desc[] = {
	{
		.name = "LDO1",
		.id = 1,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = WM8994_LDO1_MAX_SELECTOR + 1,
		.vsel_reg = WM8994_LDO_1,
		.vsel_mask = WM8994_LDO1_VSEL_MASK,
		.ops = &wm8994_ldo1_ops,
		.min_uV = 2400000,
		.uV_step = 100000,
		.enable_time = 3000,
		.owner = THIS_MODULE,
	},
	{
		.name = "LDO2",
		.id = 2,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = WM8994_LDO2_MAX_SELECTOR + 1,
		.vsel_reg = WM8994_LDO_2,
		.vsel_mask = WM8994_LDO2_VSEL_MASK,
		.ops = &wm8994_ldo2_ops,
		.enable_time = 3000,
		.owner = THIS_MODULE,
	},
};

static int wm8994_ldo_probe(struct platform_device *pdev)
{
	struct wm8994 *wm8994 = dev_get_drvdata(pdev->dev.parent);
	struct wm8994_pdata *pdata = wm8994->dev->platform_data;
	int id = pdev->id % ARRAY_SIZE(pdata->ldo);
	struct regulator_config config = { };
	struct wm8994_ldo *ldo;
	int ret;

	dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);

	ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm8994_ldo), GFP_KERNEL);
	if (ldo == NULL) {
		dev_err(&pdev->dev, "Unable to allocate private data\n");
		return -ENOMEM;
	}

	ldo->wm8994 = wm8994;

	config.dev = wm8994->dev;
	config.driver_data = ldo;
	config.regmap = wm8994->regmap;
	if (pdata) {
		config.init_data = pdata->ldo[id].init_data;
		config.ena_gpio = pdata->ldo[id].enable;
	}

	ldo->regulator = regulator_register(&wm8994_ldo_desc[id], &config);
	if (IS_ERR(ldo->regulator)) {
		ret = PTR_ERR(ldo->regulator);
		dev_err(wm8994->dev, "Failed to register LDO%d: %d\n",
			id + 1, ret);
		goto err;
	}

	platform_set_drvdata(pdev, ldo);

	return 0;

err:
	return ret;
}

static int wm8994_ldo_remove(struct platform_device *pdev)
{
	struct wm8994_ldo *ldo = platform_get_drvdata(pdev);

	platform_set_drvdata(pdev, NULL);

	regulator_unregister(ldo->regulator);

	return 0;
}

static struct platform_driver wm8994_ldo_driver = {
	.probe = wm8994_ldo_probe,
	.remove = wm8994_ldo_remove,
	.driver		= {
		.name	= "wm8994-ldo",
		.owner	= THIS_MODULE,
	},
};

module_platform_driver(wm8994_ldo_driver);

/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("WM8994 LDO driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm8994-ldo");
Commit	Line	Data
69dc16c3 MB	1	/*
	2	* wm8994-regulator.c -- Regulator driver for the WM8994
	3	*
	4	* Copyright 2009 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/gpio.h>
5a0e3ad6	22	#include <linux/slab.h>
69dc16c3 MB	23
	24	#include <linux/mfd/wm8994/core.h>
	25	#include <linux/mfd/wm8994/registers.h>
	26	#include <linux/mfd/wm8994/pdata.h>
	27
	28	struct wm8994_ldo {
69dc16c3 MB	29	struct regulator_dev *regulator;
	30	struct wm8994 *wm8994;
	31	};
	32
	33	#define WM8994_LDO1_MAX_SELECTOR 0x7
	34	#define WM8994_LDO2_MAX_SELECTOR 0x3
	35
69dc16c3	36	static struct regulator_ops wm8994_ldo1_ops = {
f2d103ad AL	37	.list_voltage = regulator_list_voltage_linear,
f2d103ad AL	38	.map_voltage = regulator_map_voltage_linear,
633b6fcd MB	39	.get_voltage_sel = regulator_get_voltage_sel_regmap,
633b6fcd MB	40	.set_voltage_sel = regulator_set_voltage_sel_regmap,
69dc16c3 MB	41	};
	42
	43	static int wm8994_ldo2_list_voltage(struct regulator_dev *rdev,
	44	unsigned int selector)
	45	{
5a7743ed MB	46	struct wm8994_ldo *ldo = rdev_get_drvdata(rdev);
5a7743ed MB	47
69dc16c3 MB	48	if (selector > WM8994_LDO2_MAX_SELECTOR)
	49	return -EINVAL;
	50
5a7743ed MB	51	switch (ldo->wm8994->type) {
	52	case WM8994:
	53	return (selector * 100000) + 900000;
	54	case WM8958:
	55	return (selector * 100000) + 1000000;
a1ff89ef MB	56	case WM1811:
	57	switch (selector) {
	58	case 0:
	59	return -EINVAL;
	60	default:
	61	return (selector * 100000) + 950000;
	62	}
	63	break;
5a7743ed MB	64	default:
	65	return -EINVAL;
	66	}
69dc16c3 MB	67	}
69dc16c3 MB	68
69dc16c3	69	static struct regulator_ops wm8994_ldo2_ops = {
69dc16c3	70	.list_voltage = wm8994_ldo2_list_voltage,
633b6fcd MB	71	.get_voltage_sel = regulator_get_voltage_sel_regmap,
633b6fcd MB	72	.set_voltage_sel = regulator_set_voltage_sel_regmap,
69dc16c3 MB	73	};
69dc16c3 MB	74
25e4d602	75	static const struct regulator_desc wm8994_ldo_desc[] = {
69dc16c3 MB	76	{
	77	.name = "LDO1",
	78	.id = 1,
	79	.type = REGULATOR_VOLTAGE,
	80	.n_voltages = WM8994_LDO1_MAX_SELECTOR + 1,
633b6fcd MB	81	.vsel_reg = WM8994_LDO_1,
633b6fcd MB	82	.vsel_mask = WM8994_LDO1_VSEL_MASK,
69dc16c3	83	.ops = &wm8994_ldo1_ops,
f2d103ad AL	84	.min_uV = 2400000,
f2d103ad AL	85	.uV_step = 100000,
00581b30	86	.enable_time = 3000,
69dc16c3 MB	87	.owner = THIS_MODULE,
	88	},
	89	{
	90	.name = "LDO2",
	91	.id = 2,
	92	.type = REGULATOR_VOLTAGE,
	93	.n_voltages = WM8994_LDO2_MAX_SELECTOR + 1,
633b6fcd MB	94	.vsel_reg = WM8994_LDO_2,
633b6fcd MB	95	.vsel_mask = WM8994_LDO2_VSEL_MASK,
69dc16c3	96	.ops = &wm8994_ldo2_ops,
00581b30	97	.enable_time = 3000,
69dc16c3 MB	98	.owner = THIS_MODULE,
	99	},
	100	};
	101
a5023574	102	static int wm8994_ldo_probe(struct platform_device *pdev)
69dc16c3 MB	103	{
	104	struct wm8994 *wm8994 = dev_get_drvdata(pdev->dev.parent);
	105	struct wm8994_pdata *pdata = wm8994->dev->platform_data;
	106	int id = pdev->id % ARRAY_SIZE(pdata->ldo);
c172708d	107	struct regulator_config config = { };
69dc16c3 MB	108	struct wm8994_ldo *ldo;
	109	int ret;
	110
	111	dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
	112
b9e0348f	113	ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm8994_ldo), GFP_KERNEL);
69dc16c3 MB	114	if (ldo == NULL) {
	115	dev_err(&pdev->dev, "Unable to allocate private data\n");
	116	return -ENOMEM;
	117	}
	118
	119	ldo->wm8994 = wm8994;
	120
5d0526ea	121	config.dev = wm8994->dev;
c172708d	122	config.driver_data = ldo;
633b6fcd	123	config.regmap = wm8994->regmap;
495fd8c8	124	if (pdata) {
b68b45d7	125	config.init_data = pdata->ldo[id].init_data;
495fd8c8 MB	126	config.ena_gpio = pdata->ldo[id].enable;
495fd8c8 MB	127	}
c172708d MB	128
c172708d MB	129	ldo->regulator = regulator_register(&wm8994_ldo_desc[id], &config);
69dc16c3 MB	130	if (IS_ERR(ldo->regulator)) {
	131	ret = PTR_ERR(ldo->regulator);
	132	dev_err(wm8994->dev, "Failed to register LDO%d: %d\n",
	133	id + 1, ret);
495fd8c8	134	goto err;
69dc16c3 MB	135	}
	136
	137	platform_set_drvdata(pdev, ldo);
	138
	139	return 0;
	140
69dc16c3	141	err:
69dc16c3 MB	142	return ret;
	143	}
	144
8dc995f5	145	static int wm8994_ldo_remove(struct platform_device *pdev)
69dc16c3 MB	146	{
	147	struct wm8994_ldo *ldo = platform_get_drvdata(pdev);
	148
598b3578 DT	149	platform_set_drvdata(pdev, NULL);
598b3578 DT	150
69dc16c3	151	regulator_unregister(ldo->regulator);
69dc16c3 MB	152
	153	return 0;
	154	}
	155
	156	static struct platform_driver wm8994_ldo_driver = {
	157	.probe = wm8994_ldo_probe,
5eb9f2b9	158	.remove = wm8994_ldo_remove,
69dc16c3 MB	159	.driver = {
69dc16c3 MB	160	.name = "wm8994-ldo",
598b3578	161	.owner = THIS_MODULE,
69dc16c3 MB	162	},
	163	};
	164
05650216	165	module_platform_driver(wm8994_ldo_driver);
69dc16c3 MB	166
	167	/* Module information */
	168	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	169	MODULE_DESCRIPTION("WM8994 LDO driver");
	170	MODULE_LICENSE("GPL");
	171	MODULE_ALIAS("platform:wm8994-ldo");