[deliverable/linux.git] / drivers / regulator / fixed.c

/*
 * fixed.c
 *
 * Copyright 2008 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 * Copyright (c) 2009 Nokia Corporation
 * Roger Quadros <ext-roger.quadros@nokia.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.
 *
 * This is useful for systems with mixed controllable and
 * non-controllable regulators, as well as for allowing testing on
 * systems with no controllable regulators.
 */

#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/fixed.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/machine.h>

struct fixed_voltage_data {
	struct regulator_desc desc;
	struct regulator_dev *dev;
	int microvolts;
	int gpio;
	bool enable_high;
	bool is_enabled;
};


/**
 * of_get_fixed_voltage_config - extract fixed_voltage_config structure info
 * @dev: device requesting for fixed_voltage_config
 *
 * Populates fixed_voltage_config structure by extracting data from device
 * tree node, returns a pointer to the populated structure of NULL if memory
 * alloc fails.
 */
static struct fixed_voltage_config *
of_get_fixed_voltage_config(struct device *dev)
{
	struct fixed_voltage_config *config;
	struct device_node *np = dev->of_node;
	const __be32 *delay;
	struct regulator_init_data *init_data;

	config = devm_kzalloc(dev, sizeof(struct fixed_voltage_config),
								 GFP_KERNEL);
	if (!config)
		return ERR_PTR(-ENOMEM);

	config->init_data = of_get_regulator_init_data(dev, dev->of_node);
	if (!config->init_data)
		return ERR_PTR(-EINVAL);

	init_data = config->init_data;
	init_data->constraints.apply_uV = 0;

	config->supply_name = init_data->constraints.name;
	if (init_data->constraints.min_uV == init_data->constraints.max_uV) {
		config->microvolts = init_data->constraints.min_uV;
	} else {
		dev_err(dev,
			 "Fixed regulator specified with variable voltages\n");
		return ERR_PTR(-EINVAL);
	}

	if (init_data->constraints.boot_on)
		config->enabled_at_boot = true;

	config->gpio = of_get_named_gpio(np, "gpio", 0);
	/*
	 * of_get_named_gpio() currently returns ENODEV rather than
	 * EPROBE_DEFER. This code attempts to be compatible with both
	 * for now; the ENODEV check can be removed once the API is fixed.
	 * of_get_named_gpio() doesn't differentiate between a missing
	 * property (which would be fine here, since the GPIO is optional)
	 * and some other error. Patches have been posted for both issues.
	 * Once they are check in, we should replace this with:
	 * if (config->gpio < 0 && config->gpio != -ENOENT)
	 */
	if ((config->gpio == -ENODEV) || (config->gpio == -EPROBE_DEFER))
		return ERR_PTR(-EPROBE_DEFER);

	delay = of_get_property(np, "startup-delay-us", NULL);
	if (delay)
		config->startup_delay = be32_to_cpu(*delay);

	if (of_find_property(np, "enable-active-high", NULL))
		config->enable_high = true;

	if (of_find_property(np, "gpio-open-drain", NULL))
		config->gpio_is_open_drain = true;

	return config;
}

static int fixed_voltage_is_enabled(struct regulator_dev *dev)
{
	struct fixed_voltage_data *data = rdev_get_drvdata(dev);

	return data->is_enabled;
}

static int fixed_voltage_enable(struct regulator_dev *dev)
{
	struct fixed_voltage_data *data = rdev_get_drvdata(dev);

	gpio_set_value_cansleep(data->gpio, data->enable_high);
	data->is_enabled = true;

	return 0;
}

static int fixed_voltage_disable(struct regulator_dev *dev)
{
	struct fixed_voltage_data *data = rdev_get_drvdata(dev);

	gpio_set_value_cansleep(data->gpio, !data->enable_high);
	data->is_enabled = false;

	return 0;
}

static int fixed_voltage_get_voltage(struct regulator_dev *dev)
{
	struct fixed_voltage_data *data = rdev_get_drvdata(dev);

	if (data->microvolts)
		return data->microvolts;
	else
		return -EINVAL;
}

static int fixed_voltage_list_voltage(struct regulator_dev *dev,
				      unsigned selector)
{
	struct fixed_voltage_data *data = rdev_get_drvdata(dev);

	if (selector != 0)
		return -EINVAL;

	return data->microvolts;
}

static struct regulator_ops fixed_voltage_gpio_ops = {
	.is_enabled = fixed_voltage_is_enabled,
	.enable = fixed_voltage_enable,
	.disable = fixed_voltage_disable,
	.get_voltage = fixed_voltage_get_voltage,
	.list_voltage = fixed_voltage_list_voltage,
};

static struct regulator_ops fixed_voltage_ops = {
	.get_voltage = fixed_voltage_get_voltage,
	.list_voltage = fixed_voltage_list_voltage,
};

static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev)
{
	struct fixed_voltage_config *config;
	struct fixed_voltage_data *drvdata;
	struct regulator_config cfg = { };
	int ret;

	if (pdev->dev.of_node) {
		config = of_get_fixed_voltage_config(&pdev->dev);
		if (IS_ERR(config))
			return PTR_ERR(config);
	} else {
		config = pdev->dev.platform_data;
	}

	if (!config)
		return -ENOMEM;

	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct fixed_voltage_data),
			       GFP_KERNEL);
	if (drvdata == NULL) {
		dev_err(&pdev->dev, "Failed to allocate device data\n");
		ret = -ENOMEM;
		goto err;
	}

	drvdata->desc.name = kstrdup(config->supply_name, GFP_KERNEL);
	if (drvdata->desc.name == NULL) {
		dev_err(&pdev->dev, "Failed to allocate supply name\n");
		ret = -ENOMEM;
		goto err;
	}
	drvdata->desc.type = REGULATOR_VOLTAGE;
	drvdata->desc.owner = THIS_MODULE;

	drvdata->desc.enable_time = config->startup_delay;

	if (config->microvolts)
		drvdata->desc.n_voltages = 1;

	drvdata->microvolts = config->microvolts;
	drvdata->gpio = config->gpio;

	if (gpio_is_valid(config->gpio)) {
		int gpio_flag;
		drvdata->enable_high = config->enable_high;

		/* FIXME: Remove below print warning
		 *
		 * config->gpio must be set to -EINVAL by platform code if
		 * GPIO control is not required. However, early adopters
		 * not requiring GPIO control may forget to initialize
		 * config->gpio to -EINVAL. This will cause GPIO 0 to be used
		 * for GPIO control.
		 *
		 * This warning will be removed once there are a couple of users
		 * for this driver.
		 */
		if (!config->gpio)
			dev_warn(&pdev->dev,
				"using GPIO 0 for regulator enable control\n");

		/*
		 * set output direction without changing state
		 * to prevent glitch
		 */
		drvdata->is_enabled = config->enabled_at_boot;
		ret = drvdata->is_enabled ?
				config->enable_high : !config->enable_high;
		gpio_flag = ret ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW;

		if (config->gpio_is_open_drain)
			gpio_flag |= GPIOF_OPEN_DRAIN;

		ret = gpio_request_one(config->gpio, gpio_flag,
						config->supply_name);
		if (ret) {
			dev_err(&pdev->dev,
			   "Could not obtain regulator enable GPIO %d: %d\n",
							config->gpio, ret);
			goto err_name;
		}

		drvdata->desc.ops = &fixed_voltage_gpio_ops;

	} else {
		drvdata->desc.ops = &fixed_voltage_ops;
	}

	cfg.dev = &pdev->dev;
	cfg.init_data = config->init_data;
	cfg.driver_data = drvdata;
	cfg.of_node = pdev->dev.of_node;

	drvdata->dev = regulator_register(&drvdata->desc, &cfg);
	if (IS_ERR(drvdata->dev)) {
		ret = PTR_ERR(drvdata->dev);
		dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);
		goto err_gpio;
	}

	platform_set_drvdata(pdev, drvdata);

	dev_dbg(&pdev->dev, "%s supplying %duV\n", drvdata->desc.name,
		drvdata->microvolts);

	return 0;

err_gpio:
	if (gpio_is_valid(config->gpio))
		gpio_free(config->gpio);
err_name:
	kfree(drvdata->desc.name);
err:
	return ret;
}

static int __devexit reg_fixed_voltage_remove(struct platform_device *pdev)
{
	struct fixed_voltage_data *drvdata = platform_get_drvdata(pdev);

	regulator_unregister(drvdata->dev);
	if (gpio_is_valid(drvdata->gpio))
		gpio_free(drvdata->gpio);
	kfree(drvdata->desc.name);

	return 0;
}

#if defined(CONFIG_OF)
static const struct of_device_id fixed_of_match[] __devinitconst = {
	{ .compatible = "regulator-fixed", },
	{},
};
MODULE_DEVICE_TABLE(of, fixed_of_match);
#endif

static struct platform_driver regulator_fixed_voltage_driver = {
	.probe		= reg_fixed_voltage_probe,
	.remove		= __devexit_p(reg_fixed_voltage_remove),
	.driver		= {
		.name		= "reg-fixed-voltage",
		.owner		= THIS_MODULE,
		.of_match_table = of_match_ptr(fixed_of_match),
	},
};

static int __init regulator_fixed_voltage_init(void)
{
	return platform_driver_register(&regulator_fixed_voltage_driver);
}
subsys_initcall(regulator_fixed_voltage_init);

static void __exit regulator_fixed_voltage_exit(void)
{
	platform_driver_unregister(&regulator_fixed_voltage_driver);
}
module_exit(regulator_fixed_voltage_exit);

MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("Fixed voltage regulator");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:reg-fixed-voltage");
Commit	Line	Data
4b74ff65 MB	1	/*
	2	* fixed.c
	3	*
	4	* Copyright 2008 Wolfson Microelectronics PLC.
	5	*
	6	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	7	*
86d9884b RQ	8	* Copyright (c) 2009 Nokia Corporation
	9	* Roger Quadros <ext-roger.quadros@nokia.com>
	10	*
4b74ff65 MB	11	* This program is free software; you can redistribute it and/or
	12	* modify it under the terms of the GNU General Public License as
	13	* published by the Free Software Foundation; either version 2 of the
	14	* License, or (at your option) any later version.
	15	*
	16	* This is useful for systems with mixed controllable and
	17	* non-controllable regulators, as well as for allowing testing on
	18	* systems with no controllable regulators.
	19	*/
	20
	21	#include <linux/err.h>
	22	#include <linux/mutex.h>
65602c32	23	#include <linux/module.h>
4b74ff65 MB	24	#include <linux/platform_device.h>
	25	#include <linux/regulator/driver.h>
	26	#include <linux/regulator/fixed.h>
86d9884b	27	#include <linux/gpio.h>
5a0e3ad6	28	#include <linux/slab.h>
cef49102 RN	29	#include <linux/of.h>
	30	#include <linux/of_gpio.h>
	31	#include <linux/regulator/of_regulator.h>
	32	#include <linux/regulator/machine.h>
4b74ff65 MB	33
	34	struct fixed_voltage_data {
	35	struct regulator_desc desc;
	36	struct regulator_dev *dev;
	37	int microvolts;
86d9884b	38	int gpio;
8ab3343d DT	39	bool enable_high;
8ab3343d DT	40	bool is_enabled;
4b74ff65 MB	41	};
4b74ff65 MB	42
cef49102 RN	43
	44	/**
	45	* of_get_fixed_voltage_config - extract fixed_voltage_config structure info
	46	* @dev: device requesting for fixed_voltage_config
	47	*
	48	* Populates fixed_voltage_config structure by extracting data from device
	49	* tree node, returns a pointer to the populated structure of NULL if memory
	50	* alloc fails.
	51	*/
bc91396b AL	52	static struct fixed_voltage_config *
bc91396b AL	53	of_get_fixed_voltage_config(struct device *dev)
cef49102 RN	54	{
	55	struct fixed_voltage_config *config;
	56	struct device_node *np = dev->of_node;
	57	const __be32 *delay;
	58	struct regulator_init_data *init_data;
	59
	60	config = devm_kzalloc(dev, sizeof(struct fixed_voltage_config),
	61	GFP_KERNEL);
	62	if (!config)
f141822b	63	return ERR_PTR(-ENOMEM);
cef49102	64
d9a861cc	65	config->init_data = of_get_regulator_init_data(dev, dev->of_node);
4b864af1	66	if (!config->init_data)
f141822b	67	return ERR_PTR(-EINVAL);
4b864af1	68
cef49102	69	init_data = config->init_data;
0c437c4a	70	init_data->constraints.apply_uV = 0;
cef49102 RN	71
	72	config->supply_name = init_data->constraints.name;
	73	if (init_data->constraints.min_uV == init_data->constraints.max_uV) {
	74	config->microvolts = init_data->constraints.min_uV;
	75	} else {
	76	dev_err(dev,
	77	"Fixed regulator specified with variable voltages\n");
f141822b	78	return ERR_PTR(-EINVAL);
cef49102 RN	79	}
	80
	81	if (init_data->constraints.boot_on)
	82	config->enabled_at_boot = true;
	83
	84	config->gpio = of_get_named_gpio(np, "gpio", 0);
f141822b SW	85	/*
	86	* of_get_named_gpio() currently returns ENODEV rather than
	87	* EPROBE_DEFER. This code attempts to be compatible with both
	88	* for now; the ENODEV check can be removed once the API is fixed.
	89	* of_get_named_gpio() doesn't differentiate between a missing
	90	* property (which would be fine here, since the GPIO is optional)
	91	* and some other error. Patches have been posted for both issues.
	92	* Once they are check in, we should replace this with:
	93	* if (config->gpio < 0 && config->gpio != -ENOENT)
	94	*/
	95	if ((config->gpio == -ENODEV) \|\| (config->gpio == -EPROBE_DEFER))
	96	return ERR_PTR(-EPROBE_DEFER);
	97
cef49102 RN	98	delay = of_get_property(np, "startup-delay-us", NULL);
	99	if (delay)
	100	config->startup_delay = be32_to_cpu(*delay);
	101
	102	if (of_find_property(np, "enable-active-high", NULL))
	103	config->enable_high = true;
	104
9a50dba5 LD	105	if (of_find_property(np, "gpio-open-drain", NULL))
	106	config->gpio_is_open_drain = true;
	107
cef49102 RN	108	return config;
	109	}
	110
4b74ff65 MB	111	static int fixed_voltage_is_enabled(struct regulator_dev *dev)
4b74ff65 MB	112	{
86d9884b RQ	113	struct fixed_voltage_data *data = rdev_get_drvdata(dev);
	114
	115	return data->is_enabled;
4b74ff65 MB	116	}
	117
	118	static int fixed_voltage_enable(struct regulator_dev *dev)
	119	{
86d9884b RQ	120	struct fixed_voltage_data *data = rdev_get_drvdata(dev);
86d9884b RQ	121
9d442061 MB	122	gpio_set_value_cansleep(data->gpio, data->enable_high);
9d442061 MB	123	data->is_enabled = true;
86d9884b RQ	124
	125	return 0;
	126	}
	127
	128	static int fixed_voltage_disable(struct regulator_dev *dev)
	129	{
	130	struct fixed_voltage_data *data = rdev_get_drvdata(dev);
	131
9d442061 MB	132	gpio_set_value_cansleep(data->gpio, !data->enable_high);
9d442061 MB	133	data->is_enabled = false;
86d9884b	134
4b74ff65 MB	135	return 0;
	136	}
	137
	138	static int fixed_voltage_get_voltage(struct regulator_dev *dev)
	139	{
	140	struct fixed_voltage_data *data = rdev_get_drvdata(dev);
	141
aebe4958 MB	142	if (data->microvolts)
	143	return data->microvolts;
	144	else
	145	return -EINVAL;
4b74ff65 MB	146	}
4b74ff65 MB	147
9035cefc MB	148	static int fixed_voltage_list_voltage(struct regulator_dev *dev,
	149	unsigned selector)
	150	{
	151	struct fixed_voltage_data *data = rdev_get_drvdata(dev);
	152
	153	if (selector != 0)
	154	return -EINVAL;
	155
	156	return data->microvolts;
	157	}
	158
9d442061	159	static struct regulator_ops fixed_voltage_gpio_ops = {
4b74ff65 MB	160	.is_enabled = fixed_voltage_is_enabled,
4b74ff65 MB	161	.enable = fixed_voltage_enable,
86d9884b	162	.disable = fixed_voltage_disable,
4b74ff65	163	.get_voltage = fixed_voltage_get_voltage,
9035cefc	164	.list_voltage = fixed_voltage_list_voltage,
4b74ff65 MB	165	};
4b74ff65 MB	166
9d442061 MB	167	static struct regulator_ops fixed_voltage_ops = {
	168	.get_voltage = fixed_voltage_get_voltage,
	169	.list_voltage = fixed_voltage_list_voltage,
	170	};
	171
8ab3343d	172	static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev)
4b74ff65	173	{
22d881c0	174	struct fixed_voltage_config *config;
4b74ff65	175	struct fixed_voltage_data *drvdata;
c172708d	176	struct regulator_config cfg = { };
4b74ff65 MB	177	int ret;
4b74ff65 MB	178
f141822b	179	if (pdev->dev.of_node) {
cef49102	180	config = of_get_fixed_voltage_config(&pdev->dev);
f141822b SW	181	if (IS_ERR(config))
	182	return PTR_ERR(config);
	183	} else {
22d881c0	184	config = pdev->dev.platform_data;
f141822b	185	}
22d881c0 AL	186
	187	if (!config)
	188	return -ENOMEM;
cef49102	189
c45bb35f MB	190	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct fixed_voltage_data),
c45bb35f MB	191	GFP_KERNEL);
4b74ff65	192	if (drvdata == NULL) {
c53ad7fe	193	dev_err(&pdev->dev, "Failed to allocate device data\n");
4b74ff65 MB	194	ret = -ENOMEM;
	195	goto err;
	196	}
	197
	198	drvdata->desc.name = kstrdup(config->supply_name, GFP_KERNEL);
	199	if (drvdata->desc.name == NULL) {
c53ad7fe	200	dev_err(&pdev->dev, "Failed to allocate supply name\n");
4b74ff65 MB	201	ret = -ENOMEM;
	202	goto err;
	203	}
	204	drvdata->desc.type = REGULATOR_VOLTAGE;
	205	drvdata->desc.owner = THIS_MODULE;
1c37f8a8	206
3d0f267f MB	207	drvdata->desc.enable_time = config->startup_delay;
3d0f267f MB	208
1c37f8a8 SH	209	if (config->microvolts)
1c37f8a8 SH	210	drvdata->desc.n_voltages = 1;
4b74ff65 MB	211
4b74ff65 MB	212	drvdata->microvolts = config->microvolts;
86d9884b RQ	213	drvdata->gpio = config->gpio;
	214
	215	if (gpio_is_valid(config->gpio)) {
a4d9f179	216	int gpio_flag;
86d9884b RQ	217	drvdata->enable_high = config->enable_high;
	218
	219	/* FIXME: Remove below print warning
	220	*
	221	* config->gpio must be set to -EINVAL by platform code if
	222	* GPIO control is not required. However, early adopters
	223	* not requiring GPIO control may forget to initialize
	224	* config->gpio to -EINVAL. This will cause GPIO 0 to be used
	225	* for GPIO control.
	226	*
	227	* This warning will be removed once there are a couple of users
	228	* for this driver.
	229	*/
	230	if (!config->gpio)
	231	dev_warn(&pdev->dev,
	232	"using GPIO 0 for regulator enable control\n");
	233
a4d9f179 LD	234	/*
a4d9f179 LD	235	* set output direction without changing state
86d9884b RQ	236	* to prevent glitch
	237	*/
	238	drvdata->is_enabled = config->enabled_at_boot;
	239	ret = drvdata->is_enabled ?
	240	config->enable_high : !config->enable_high;
a4d9f179 LD	241	gpio_flag = ret ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW;
	242
	243	if (config->gpio_is_open_drain)
	244	gpio_flag \|= GPIOF_OPEN_DRAIN;
86d9884b	245
a4d9f179 LD	246	ret = gpio_request_one(config->gpio, gpio_flag,
a4d9f179 LD	247	config->supply_name);
86d9884b RQ	248	if (ret) {
86d9884b RQ	249	dev_err(&pdev->dev,
a4d9f179	250	"Could not obtain regulator enable GPIO %d: %d\n",
86d9884b	251	config->gpio, ret);
a4d9f179	252	goto err_name;
86d9884b RQ	253	}
86d9884b RQ	254
9d442061 MB	255	drvdata->desc.ops = &fixed_voltage_gpio_ops;
9d442061 MB	256
86d9884b	257	} else {
9d442061	258	drvdata->desc.ops = &fixed_voltage_ops;
86d9884b	259	}
4b74ff65	260
c172708d MB	261	cfg.dev = &pdev->dev;
	262	cfg.init_data = config->init_data;
	263	cfg.driver_data = drvdata;
	264	cfg.of_node = pdev->dev.of_node;
	265
	266	drvdata->dev = regulator_register(&drvdata->desc, &cfg);
4b74ff65 MB	267	if (IS_ERR(drvdata->dev)) {
4b74ff65 MB	268	ret = PTR_ERR(drvdata->dev);
c53ad7fe	269	dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);
86d9884b	270	goto err_gpio;
4b74ff65 MB	271	}
	272
	273	platform_set_drvdata(pdev, drvdata);
	274
	275	dev_dbg(&pdev->dev, "%s supplying %duV\n", drvdata->desc.name,
	276	drvdata->microvolts);
	277
	278	return 0;
	279
86d9884b RQ	280	err_gpio:
	281	if (gpio_is_valid(config->gpio))
	282	gpio_free(config->gpio);
4b74ff65 MB	283	err_name:
	284	kfree(drvdata->desc.name);
	285	err:
4b74ff65 MB	286	return ret;
	287	}
	288
8ab3343d	289	static int __devexit reg_fixed_voltage_remove(struct platform_device *pdev)
4b74ff65 MB	290	{
	291	struct fixed_voltage_data *drvdata = platform_get_drvdata(pdev);
	292
	293	regulator_unregister(drvdata->dev);
86d9884b RQ	294	if (gpio_is_valid(drvdata->gpio))
86d9884b RQ	295	gpio_free(drvdata->gpio);
80099c70	296	kfree(drvdata->desc.name);
86d9884b	297
4b74ff65 MB	298	return 0;
	299	}
	300
cef49102 RN	301	#if defined(CONFIG_OF)
	302	static const struct of_device_id fixed_of_match[] __devinitconst = {
	303	{ .compatible = "regulator-fixed", },
	304	{},
	305	};
	306	MODULE_DEVICE_TABLE(of, fixed_of_match);
cef49102 RN	307	#endif
cef49102 RN	308
4b74ff65	309	static struct platform_driver regulator_fixed_voltage_driver = {
8ab3343d DT	310	.probe = reg_fixed_voltage_probe,
8ab3343d DT	311	.remove = __devexit_p(reg_fixed_voltage_remove),
4b74ff65 MB	312	.driver = {
4b74ff65 MB	313	.name = "reg-fixed-voltage",
8ab3343d	314	.owner = THIS_MODULE,
abcfaf23	315	.of_match_table = of_match_ptr(fixed_of_match),
4b74ff65 MB	316	},
	317	};
	318
	319	static int __init regulator_fixed_voltage_init(void)
	320	{
	321	return platform_driver_register(&regulator_fixed_voltage_driver);
	322	}
5a1b22be	323	subsys_initcall(regulator_fixed_voltage_init);
4b74ff65 MB	324
	325	static void __exit regulator_fixed_voltage_exit(void)
	326	{
	327	platform_driver_unregister(&regulator_fixed_voltage_driver);
	328	}
	329	module_exit(regulator_fixed_voltage_exit);
	330
	331	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	332	MODULE_DESCRIPTION("Fixed voltage regulator");
	333	MODULE_LICENSE("GPL");
38c53c89	334	MODULE_ALIAS("platform:reg-fixed-voltage");