[mirror_ubuntu-zesty-kernel.git] / drivers / regulator / wm8400-regulator.c

/*
 * Regulator support for WM8400
 *
 * Copyright 2008 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/bug.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/regulator/driver.h>
#include <linux/mfd/wm8400-private.h>

static const struct regulator_linear_range wm8400_ldo_ranges[] = {
	REGULATOR_LINEAR_RANGE(900000, 0, 14, 50000),
	REGULATOR_LINEAR_RANGE(1700000, 15, 31, 100000),
};

static const struct regulator_ops wm8400_ldo_ops = {
	.is_enabled = regulator_is_enabled_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.list_voltage = regulator_list_voltage_linear_range,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.map_voltage = regulator_map_voltage_linear_range,
};

static unsigned int wm8400_dcdc_get_mode(struct regulator_dev *dev)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	u16 data[2];
	int ret;

	ret = wm8400_block_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset, 2,
				data);
	if (ret != 0)
		return 0;

	/* Datasheet: hibernate */
	if (data[0] & WM8400_DC1_SLEEP)
		return REGULATOR_MODE_STANDBY;

	/* Datasheet: standby */
	if (!(data[0] & WM8400_DC1_ACTIVE))
		return REGULATOR_MODE_IDLE;

	/* Datasheet: active with or without force PWM */
	if (data[1] & WM8400_DC1_FRC_PWM)
		return REGULATOR_MODE_FAST;
	else
		return REGULATOR_MODE_NORMAL;
}

static int wm8400_dcdc_set_mode(struct regulator_dev *dev, unsigned int mode)
{
	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	int ret;

	switch (mode) {
	case REGULATOR_MODE_FAST:
		/* Datasheet: active with force PWM */
		ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_2 + offset,
				      WM8400_DC1_FRC_PWM, WM8400_DC1_FRC_PWM);
		if (ret != 0)
			return ret;

		return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
				       WM8400_DC1_ACTIVE | WM8400_DC1_SLEEP,
				       WM8400_DC1_ACTIVE);

	case REGULATOR_MODE_NORMAL:
		/* Datasheet: active */
		ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_2 + offset,
				      WM8400_DC1_FRC_PWM, 0);
		if (ret != 0)
			return ret;

		return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
				       WM8400_DC1_ACTIVE | WM8400_DC1_SLEEP,
				       WM8400_DC1_ACTIVE);

	case REGULATOR_MODE_IDLE:
		/* Datasheet: standby */
		return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
				       WM8400_DC1_ACTIVE | WM8400_DC1_SLEEP, 0);
	default:
		return -EINVAL;
	}
}

static unsigned int wm8400_dcdc_get_optimum_mode(struct regulator_dev *dev,
						 int input_uV, int output_uV,
						 int load_uA)
{
	return REGULATOR_MODE_NORMAL;
}

static const struct regulator_ops wm8400_dcdc_ops = {
	.is_enabled = regulator_is_enabled_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.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_mode = wm8400_dcdc_get_mode,
	.set_mode = wm8400_dcdc_set_mode,
	.get_optimum_mode = wm8400_dcdc_get_optimum_mode,
};

static struct regulator_desc regulators[] = {
	{
		.name = "LDO1",
		.id = WM8400_LDO1,
		.ops = &wm8400_ldo_ops,
		.enable_reg = WM8400_LDO1_CONTROL,
		.enable_mask = WM8400_LDO1_ENA,
		.n_voltages = WM8400_LDO1_VSEL_MASK + 1,
		.linear_ranges = wm8400_ldo_ranges,
		.n_linear_ranges = ARRAY_SIZE(wm8400_ldo_ranges),
		.vsel_reg = WM8400_LDO1_CONTROL,
		.vsel_mask = WM8400_LDO1_VSEL_MASK,
		.type = REGULATOR_VOLTAGE,
		.owner = THIS_MODULE,
	},
	{
		.name = "LDO2",
		.id = WM8400_LDO2,
		.ops = &wm8400_ldo_ops,
		.enable_reg = WM8400_LDO2_CONTROL,
		.enable_mask = WM8400_LDO2_ENA,
		.n_voltages = WM8400_LDO2_VSEL_MASK + 1,
		.linear_ranges = wm8400_ldo_ranges,
		.n_linear_ranges = ARRAY_SIZE(wm8400_ldo_ranges),
		.type = REGULATOR_VOLTAGE,
		.vsel_reg = WM8400_LDO2_CONTROL,
		.vsel_mask = WM8400_LDO2_VSEL_MASK,
		.owner = THIS_MODULE,
	},
	{
		.name = "LDO3",
		.id = WM8400_LDO3,
		.ops = &wm8400_ldo_ops,
		.enable_reg = WM8400_LDO3_CONTROL,
		.enable_mask = WM8400_LDO3_ENA,
		.n_voltages = WM8400_LDO3_VSEL_MASK + 1,
		.linear_ranges = wm8400_ldo_ranges,
		.n_linear_ranges = ARRAY_SIZE(wm8400_ldo_ranges),
		.vsel_reg = WM8400_LDO3_CONTROL,
		.vsel_mask = WM8400_LDO3_VSEL_MASK,
		.type = REGULATOR_VOLTAGE,
		.owner = THIS_MODULE,
	},
	{
		.name = "LDO4",
		.id = WM8400_LDO4,
		.ops = &wm8400_ldo_ops,
		.enable_reg = WM8400_LDO4_CONTROL,
		.enable_mask = WM8400_LDO4_ENA,
		.n_voltages = WM8400_LDO4_VSEL_MASK + 1,
		.linear_ranges = wm8400_ldo_ranges,
		.n_linear_ranges = ARRAY_SIZE(wm8400_ldo_ranges),
		.vsel_reg = WM8400_LDO4_CONTROL,
		.vsel_mask = WM8400_LDO4_VSEL_MASK,
		.type = REGULATOR_VOLTAGE,
		.owner = THIS_MODULE,
	},
	{
		.name = "DCDC1",
		.id = WM8400_DCDC1,
		.ops = &wm8400_dcdc_ops,
		.enable_reg = WM8400_DCDC1_CONTROL_1,
		.enable_mask = WM8400_DC1_ENA_MASK,
		.n_voltages = WM8400_DC1_VSEL_MASK + 1,
		.vsel_reg = WM8400_DCDC1_CONTROL_1,
		.vsel_mask = WM8400_DC1_VSEL_MASK,
		.min_uV = 850000,
		.uV_step = 25000,
		.type = REGULATOR_VOLTAGE,
		.owner = THIS_MODULE,
	},
	{
		.name = "DCDC2",
		.id = WM8400_DCDC2,
		.ops = &wm8400_dcdc_ops,
		.enable_reg = WM8400_DCDC2_CONTROL_1,
		.enable_mask = WM8400_DC1_ENA_MASK,
		.n_voltages = WM8400_DC2_VSEL_MASK + 1,
		.vsel_reg = WM8400_DCDC2_CONTROL_1,
		.vsel_mask = WM8400_DC2_VSEL_MASK,
		.min_uV = 850000,
		.uV_step = 25000,
		.type = REGULATOR_VOLTAGE,
		.owner = THIS_MODULE,
	},
};

static int wm8400_regulator_probe(struct platform_device *pdev)
{
	struct wm8400 *wm8400 = container_of(pdev, struct wm8400, regulators[pdev->id]);
	struct regulator_config config = { };
	struct regulator_dev *rdev;

	config.dev = &pdev->dev;
	config.init_data = dev_get_platdata(&pdev->dev);
	config.driver_data = wm8400;
	config.regmap = wm8400->regmap;

	rdev = devm_regulator_register(&pdev->dev, &regulators[pdev->id],
				       &config);
	if (IS_ERR(rdev))
		return PTR_ERR(rdev);

	platform_set_drvdata(pdev, rdev);

	return 0;
}

static struct platform_driver wm8400_regulator_driver = {
	.driver = {
		.name = "wm8400-regulator",
	},
	.probe = wm8400_regulator_probe,
};

/**
 * wm8400_register_regulator - enable software control of a WM8400 regulator
 *
 * This function enables software control of a WM8400 regulator via
 * the regulator API.  It is intended to be called from the
 * platform_init() callback of the WM8400 MFD driver.
 *
 * @param dev      The WM8400 device to operate on.
 * @param reg      The regulator to control.
 * @param initdata Regulator initdata for the regulator.
 */
int wm8400_register_regulator(struct device *dev, int reg,
			      struct regulator_init_data *initdata)
{
	struct wm8400 *wm8400 = dev_get_drvdata(dev);

	if (wm8400->regulators[reg].name)
		return -EBUSY;

	initdata->driver_data = wm8400;

	wm8400->regulators[reg].name = "wm8400-regulator";
	wm8400->regulators[reg].id = reg;
	wm8400->regulators[reg].dev.parent = dev;
	wm8400->regulators[reg].dev.platform_data = initdata;

	return platform_device_register(&wm8400->regulators[reg]);
}
EXPORT_SYMBOL_GPL(wm8400_register_regulator);

static int __init wm8400_regulator_init(void)
{
	return platform_driver_register(&wm8400_regulator_driver);
}
subsys_initcall(wm8400_regulator_init);

static void __exit wm8400_regulator_exit(void)
{
	platform_driver_unregister(&wm8400_regulator_driver);
}
module_exit(wm8400_regulator_exit);

MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("WM8400 regulator driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm8400-regulator");
Commit	Line	Data
42fad570 MB	1	/*
	2	* Regulator support for WM8400
	3	*
	4	* Copyright 2008 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
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of the
	11	* License, or (at your option) any later version.
	12	*
	13	*/
	14
	15	#include <linux/bug.h>
	16	#include <linux/err.h>
	17	#include <linux/kernel.h>
65602c32	18	#include <linux/module.h>
42fad570 MB	19	#include <linux/regulator/driver.h>
	20	#include <linux/mfd/wm8400-private.h>
	21
6692e432	22	static const struct regulator_linear_range wm8400_ldo_ranges[] = {
8828bae4 AL	23	REGULATOR_LINEAR_RANGE(900000, 0, 14, 50000),
8828bae4 AL	24	REGULATOR_LINEAR_RANGE(1700000, 15, 31, 100000),
6692e432	25	};
42fad570	26
b0d6dd3b	27	static const struct regulator_ops wm8400_ldo_ops = {
c54a155d MB	28	.is_enabled = regulator_is_enabled_regmap,
	29	.enable = regulator_enable_regmap,
	30	.disable = regulator_disable_regmap,
6692e432	31	.list_voltage = regulator_list_voltage_linear_range,
c54a155d MB	32	.get_voltage_sel = regulator_get_voltage_sel_regmap,
c54a155d MB	33	.set_voltage_sel = regulator_set_voltage_sel_regmap,
6692e432	34	.map_voltage = regulator_map_voltage_linear_range,
42fad570 MB	35	};
42fad570 MB	36
42fad570 MB	37	static unsigned int wm8400_dcdc_get_mode(struct regulator_dev *dev)
	38	{
	39	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	40	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	41	u16 data[2];
	42	int ret;
	43
	44	ret = wm8400_block_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset, 2,
	45	data);
	46	if (ret != 0)
	47	return 0;
	48
	49	/* Datasheet: hibernate */
	50	if (data[0] & WM8400_DC1_SLEEP)
	51	return REGULATOR_MODE_STANDBY;
	52
	53	/* Datasheet: standby */
	54	if (!(data[0] & WM8400_DC1_ACTIVE))
	55	return REGULATOR_MODE_IDLE;
	56
	57	/* Datasheet: active with or without force PWM */
	58	if (data[1] & WM8400_DC1_FRC_PWM)
	59	return REGULATOR_MODE_FAST;
	60	else
	61	return REGULATOR_MODE_NORMAL;
	62	}
	63
	64	static int wm8400_dcdc_set_mode(struct regulator_dev *dev, unsigned int mode)
	65	{
	66	struct wm8400 *wm8400 = rdev_get_drvdata(dev);
	67	int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
	68	int ret;
	69
	70	switch (mode) {
	71	case REGULATOR_MODE_FAST:
	72	/* Datasheet: active with force PWM */
	73	ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_2 + offset,
	74	WM8400_DC1_FRC_PWM, WM8400_DC1_FRC_PWM);
	75	if (ret != 0)
	76	return ret;
	77
	78	return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
	79	WM8400_DC1_ACTIVE \| WM8400_DC1_SLEEP,
	80	WM8400_DC1_ACTIVE);
	81
	82	case REGULATOR_MODE_NORMAL:
	83	/* Datasheet: active */
	84	ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_2 + offset,
	85	WM8400_DC1_FRC_PWM, 0);
	86	if (ret != 0)
	87	return ret;
	88
	89	return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
	90	WM8400_DC1_ACTIVE \| WM8400_DC1_SLEEP,
	91	WM8400_DC1_ACTIVE);
	92
	93	case REGULATOR_MODE_IDLE:
	94	/* Datasheet: standby */
42fad570	95	return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
4001376e	96	WM8400_DC1_ACTIVE \| WM8400_DC1_SLEEP, 0);
42fad570 MB	97	default:
	98	return -EINVAL;
	99	}
	100	}
	101
	102	static unsigned int wm8400_dcdc_get_optimum_mode(struct regulator_dev *dev,
	103	int input_uV, int output_uV,
	104	int load_uA)
	105	{
	106	return REGULATOR_MODE_NORMAL;
	107	}
	108
b0d6dd3b	109	static const struct regulator_ops wm8400_dcdc_ops = {
c54a155d MB	110	.is_enabled = regulator_is_enabled_regmap,
	111	.enable = regulator_enable_regmap,
	112	.disable = regulator_disable_regmap,
	113	.list_voltage = regulator_list_voltage_linear,
27eeabb7	114	.map_voltage = regulator_map_voltage_linear,
c54a155d MB	115	.get_voltage_sel = regulator_get_voltage_sel_regmap,
c54a155d MB	116	.set_voltage_sel = regulator_set_voltage_sel_regmap,
42fad570 MB	117	.get_mode = wm8400_dcdc_get_mode,
	118	.set_mode = wm8400_dcdc_set_mode,
	119	.get_optimum_mode = wm8400_dcdc_get_optimum_mode,
	120	};
	121
	122	static struct regulator_desc regulators[] = {
	123	{
	124	.name = "LDO1",
	125	.id = WM8400_LDO1,
	126	.ops = &wm8400_ldo_ops,
c54a155d MB	127	.enable_reg = WM8400_LDO1_CONTROL,
c54a155d MB	128	.enable_mask = WM8400_LDO1_ENA,
216765d9	129	.n_voltages = WM8400_LDO1_VSEL_MASK + 1,
6692e432 MB	130	.linear_ranges = wm8400_ldo_ranges,
6692e432 MB	131	.n_linear_ranges = ARRAY_SIZE(wm8400_ldo_ranges),
c54a155d MB	132	.vsel_reg = WM8400_LDO1_CONTROL,
c54a155d MB	133	.vsel_mask = WM8400_LDO1_VSEL_MASK,
42fad570 MB	134	.type = REGULATOR_VOLTAGE,
	135	.owner = THIS_MODULE,
	136	},
	137	{
	138	.name = "LDO2",
	139	.id = WM8400_LDO2,
	140	.ops = &wm8400_ldo_ops,
c54a155d MB	141	.enable_reg = WM8400_LDO2_CONTROL,
c54a155d MB	142	.enable_mask = WM8400_LDO2_ENA,
216765d9	143	.n_voltages = WM8400_LDO2_VSEL_MASK + 1,
6692e432 MB	144	.linear_ranges = wm8400_ldo_ranges,
6692e432 MB	145	.n_linear_ranges = ARRAY_SIZE(wm8400_ldo_ranges),
42fad570	146	.type = REGULATOR_VOLTAGE,
c54a155d MB	147	.vsel_reg = WM8400_LDO2_CONTROL,
c54a155d MB	148	.vsel_mask = WM8400_LDO2_VSEL_MASK,
42fad570 MB	149	.owner = THIS_MODULE,
	150	},
	151	{
	152	.name = "LDO3",
	153	.id = WM8400_LDO3,
	154	.ops = &wm8400_ldo_ops,
c54a155d MB	155	.enable_reg = WM8400_LDO3_CONTROL,
c54a155d MB	156	.enable_mask = WM8400_LDO3_ENA,
216765d9	157	.n_voltages = WM8400_LDO3_VSEL_MASK + 1,
6692e432 MB	158	.linear_ranges = wm8400_ldo_ranges,
6692e432 MB	159	.n_linear_ranges = ARRAY_SIZE(wm8400_ldo_ranges),
c54a155d MB	160	.vsel_reg = WM8400_LDO3_CONTROL,
c54a155d MB	161	.vsel_mask = WM8400_LDO3_VSEL_MASK,
42fad570 MB	162	.type = REGULATOR_VOLTAGE,
	163	.owner = THIS_MODULE,
	164	},
	165	{
	166	.name = "LDO4",
	167	.id = WM8400_LDO4,
	168	.ops = &wm8400_ldo_ops,
c54a155d MB	169	.enable_reg = WM8400_LDO4_CONTROL,
c54a155d MB	170	.enable_mask = WM8400_LDO4_ENA,
216765d9	171	.n_voltages = WM8400_LDO4_VSEL_MASK + 1,
6692e432 MB	172	.linear_ranges = wm8400_ldo_ranges,
6692e432 MB	173	.n_linear_ranges = ARRAY_SIZE(wm8400_ldo_ranges),
c54a155d MB	174	.vsel_reg = WM8400_LDO4_CONTROL,
c54a155d MB	175	.vsel_mask = WM8400_LDO4_VSEL_MASK,
42fad570 MB	176	.type = REGULATOR_VOLTAGE,
	177	.owner = THIS_MODULE,
	178	},
	179	{
	180	.name = "DCDC1",
	181	.id = WM8400_DCDC1,
	182	.ops = &wm8400_dcdc_ops,
c54a155d MB	183	.enable_reg = WM8400_DCDC1_CONTROL_1,
c54a155d MB	184	.enable_mask = WM8400_DC1_ENA_MASK,
216765d9	185	.n_voltages = WM8400_DC1_VSEL_MASK + 1,
c54a155d MB	186	.vsel_reg = WM8400_DCDC1_CONTROL_1,
	187	.vsel_mask = WM8400_DC1_VSEL_MASK,
	188	.min_uV = 850000,
	189	.uV_step = 25000,
42fad570 MB	190	.type = REGULATOR_VOLTAGE,
	191	.owner = THIS_MODULE,
	192	},
	193	{
	194	.name = "DCDC2",
	195	.id = WM8400_DCDC2,
	196	.ops = &wm8400_dcdc_ops,
c54a155d MB	197	.enable_reg = WM8400_DCDC2_CONTROL_1,
c54a155d MB	198	.enable_mask = WM8400_DC1_ENA_MASK,
216765d9	199	.n_voltages = WM8400_DC2_VSEL_MASK + 1,
c54a155d MB	200	.vsel_reg = WM8400_DCDC2_CONTROL_1,
	201	.vsel_mask = WM8400_DC2_VSEL_MASK,
	202	.min_uV = 850000,
	203	.uV_step = 25000,
42fad570 MB	204	.type = REGULATOR_VOLTAGE,
	205	.owner = THIS_MODULE,
	206	},
	207	};
	208
a5023574	209	static int wm8400_regulator_probe(struct platform_device *pdev)
42fad570	210	{
1ad02bbc	211	struct wm8400 *wm8400 = container_of(pdev, struct wm8400, regulators[pdev->id]);
c172708d	212	struct regulator_config config = { };
42fad570 MB	213	struct regulator_dev *rdev;
42fad570 MB	214
c172708d	215	config.dev = &pdev->dev;
dff91d0b	216	config.init_data = dev_get_platdata(&pdev->dev);
c172708d	217	config.driver_data = wm8400;
c54a155d	218	config.regmap = wm8400->regmap;
42fad570	219
eb8b3c83 MB	220	rdev = devm_regulator_register(&pdev->dev, &regulators[pdev->id],
eb8b3c83 MB	221	&config);
42fad570 MB	222	if (IS_ERR(rdev))
	223	return PTR_ERR(rdev);
	224
1ad02bbc DT	225	platform_set_drvdata(pdev, rdev);
1ad02bbc DT	226
42fad570 MB	227	return 0;
	228	}
	229
42fad570 MB	230	static struct platform_driver wm8400_regulator_driver = {
	231	.driver = {
	232	.name = "wm8400-regulator",
	233	},
	234	.probe = wm8400_regulator_probe,
42fad570 MB	235	};
	236
	237	/**
	238	* wm8400_register_regulator - enable software control of a WM8400 regulator
	239	*
	240	* This function enables software control of a WM8400 regulator via
	241	* the regulator API. It is intended to be called from the
	242	* platform_init() callback of the WM8400 MFD driver.
	243	*
	244	* @param dev The WM8400 device to operate on.
	245	* @param reg The regulator to control.
	246	* @param initdata Regulator initdata for the regulator.
	247	*/
	248	int wm8400_register_regulator(struct device *dev, int reg,
	249	struct regulator_init_data *initdata)
	250	{
1909e2f6	251	struct wm8400 *wm8400 = dev_get_drvdata(dev);
42fad570 MB	252
	253	if (wm8400->regulators[reg].name)
	254	return -EBUSY;
	255
	256	initdata->driver_data = wm8400;
	257
	258	wm8400->regulators[reg].name = "wm8400-regulator";
	259	wm8400->regulators[reg].id = reg;
	260	wm8400->regulators[reg].dev.parent = dev;
42fad570 MB	261	wm8400->regulators[reg].dev.platform_data = initdata;
	262
	263	return platform_device_register(&wm8400->regulators[reg]);
	264	}
	265	EXPORT_SYMBOL_GPL(wm8400_register_regulator);
	266
	267	static int __init wm8400_regulator_init(void)
	268	{
	269	return platform_driver_register(&wm8400_regulator_driver);
	270	}
5a1b22be	271	subsys_initcall(wm8400_regulator_init);
42fad570 MB	272
	273	static void __exit wm8400_regulator_exit(void)
	274	{
	275	platform_driver_unregister(&wm8400_regulator_driver);
	276	}
	277	module_exit(wm8400_regulator_exit);
	278
	279	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	280	MODULE_DESCRIPTION("WM8400 regulator driver");
	281	MODULE_LICENSE("GPL");
	282	MODULE_ALIAS("platform:wm8400-regulator");