[linux-block.git] / drivers / regulator / fixed.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * 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 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/pm_domain.h>
#include <linux/pm_opp.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/fixed.h>
#include <linux/gpio/consumer.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/machine.h>
#include <linux/clk.h>


struct fixed_voltage_data {
	struct regulator_desc desc;
	struct regulator_dev *dev;

	struct clk *enable_clock;
	unsigned int enable_counter;
	int performance_state;
};

struct fixed_dev_type {
	bool has_enable_clock;
	bool has_performance_state;
};

static int reg_clock_enable(struct regulator_dev *rdev)
{
	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
	int ret = 0;

	ret = clk_prepare_enable(priv->enable_clock);
	if (ret)
		return ret;

	priv->enable_counter++;

	return ret;
}

static int reg_clock_disable(struct regulator_dev *rdev)
{
	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);

	clk_disable_unprepare(priv->enable_clock);
	priv->enable_counter--;

	return 0;
}

static int reg_domain_enable(struct regulator_dev *rdev)
{
	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
	struct device *dev = rdev->dev.parent;
	int ret;

	ret = dev_pm_genpd_set_performance_state(dev, priv->performance_state);
	if (ret)
		return ret;

	priv->enable_counter++;

	return ret;
}

static int reg_domain_disable(struct regulator_dev *rdev)
{
	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
	struct device *dev = rdev->dev.parent;
	int ret;

	ret = dev_pm_genpd_set_performance_state(dev, 0);
	if (ret)
		return ret;

	priv->enable_counter--;

	return 0;
}

static int reg_is_enabled(struct regulator_dev *rdev)
{
	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);

	return priv->enable_counter > 0;
}


/**
 * of_get_fixed_voltage_config - extract fixed_voltage_config structure info
 * @dev: device requesting for fixed_voltage_config
 * @desc: regulator description
 *
 * 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,
			    const struct regulator_desc *desc)
{
	struct fixed_voltage_config *config;
	struct device_node *np = dev->of_node;
	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, desc);
	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;

	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
	of_property_read_u32(np, "off-on-delay-us", &config->off_on_delay);

	if (of_property_present(np, "vin-supply"))
		config->input_supply = "vin";

	return config;
}

static const struct regulator_ops fixed_voltage_ops = {
};

static const struct regulator_ops fixed_voltage_clkenabled_ops = {
	.enable = reg_clock_enable,
	.disable = reg_clock_disable,
	.is_enabled = reg_is_enabled,
};

static const struct regulator_ops fixed_voltage_domain_ops = {
	.enable = reg_domain_enable,
	.disable = reg_domain_disable,
	.is_enabled = reg_is_enabled,
};

static int reg_fixed_voltage_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct fixed_voltage_config *config;
	struct fixed_voltage_data *drvdata;
	const struct fixed_dev_type *drvtype = of_device_get_match_data(dev);
	struct regulator_config cfg = { };
	enum gpiod_flags gflags;
	int ret;

	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct fixed_voltage_data),
			       GFP_KERNEL);
	if (!drvdata)
		return -ENOMEM;

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

	if (!config)
		return -ENOMEM;

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

	if (drvtype && drvtype->has_enable_clock) {
		drvdata->desc.ops = &fixed_voltage_clkenabled_ops;

		drvdata->enable_clock = devm_clk_get(dev, NULL);
		if (IS_ERR(drvdata->enable_clock)) {
			dev_err(dev, "Can't get enable-clock from devicetree\n");
			return PTR_ERR(drvdata->enable_clock);
		}
	} else if (drvtype && drvtype->has_performance_state) {
		drvdata->desc.ops = &fixed_voltage_domain_ops;

		drvdata->performance_state = of_get_required_opp_performance_state(dev->of_node, 0);
		if (drvdata->performance_state < 0) {
			dev_err(dev, "Can't get performance state from devicetree\n");
			return drvdata->performance_state;
		}
	} else {
		drvdata->desc.ops = &fixed_voltage_ops;
	}

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

	if (config->input_supply) {
		drvdata->desc.supply_name = devm_kstrdup(&pdev->dev,
					    config->input_supply,
					    GFP_KERNEL);
		if (!drvdata->desc.supply_name)
			return -ENOMEM;
	}

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

	drvdata->desc.fixed_uV = config->microvolts;

	/*
	 * The signal will be inverted by the GPIO core if flagged so in the
	 * descriptor.
	 */
	if (config->enabled_at_boot)
		gflags = GPIOD_OUT_HIGH;
	else
		gflags = GPIOD_OUT_LOW;

	/*
	 * Some fixed regulators share the enable line between two
	 * regulators which makes it necessary to get a handle on the
	 * same descriptor for two different consumers. This will get
	 * the GPIO descriptor, but only the first call will initialize
	 * it so any flags such as inversion or open drain will only
	 * be set up by the first caller and assumed identical on the
	 * next caller.
	 *
	 * FIXME: find a better way to deal with this.
	 */
	gflags |= GPIOD_FLAGS_BIT_NONEXCLUSIVE;

	/*
	 * Do not use devm* here: the regulator core takes over the
	 * lifecycle management of the GPIO descriptor.
	 */
	cfg.ena_gpiod = gpiod_get_optional(&pdev->dev, NULL, gflags);
	if (IS_ERR(cfg.ena_gpiod))
		return dev_err_probe(&pdev->dev, PTR_ERR(cfg.ena_gpiod),
				     "can't get GPIO\n");

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

	drvdata->dev = devm_regulator_register(&pdev->dev, &drvdata->desc,
					       &cfg);
	if (IS_ERR(drvdata->dev)) {
		ret = dev_err_probe(&pdev->dev, PTR_ERR(drvdata->dev),
				    "Failed to register regulator: %ld\n",
				    PTR_ERR(drvdata->dev));
		return ret;
	}

	platform_set_drvdata(pdev, drvdata);

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

	return 0;
}

#if defined(CONFIG_OF)
static const struct fixed_dev_type fixed_voltage_data = {
	.has_enable_clock = false,
};

static const struct fixed_dev_type fixed_clkenable_data = {
	.has_enable_clock = true,
};

static const struct fixed_dev_type fixed_domain_data = {
	.has_performance_state = true,
};

static const struct of_device_id fixed_of_match[] = {
	{
		.compatible = "regulator-fixed",
		.data = &fixed_voltage_data,
	},
	{
		.compatible = "regulator-fixed-clock",
		.data = &fixed_clkenable_data,
	},
	{
		.compatible = "regulator-fixed-domain",
		.data = &fixed_domain_data,
	},
	{
	},
};
MODULE_DEVICE_TABLE(of, fixed_of_match);
#endif

static struct platform_driver regulator_fixed_voltage_driver = {
	.probe		= reg_fixed_voltage_probe,
	.driver		= {
		.name		= "reg-fixed-voltage",
		.probe_type	= PROBE_PREFER_ASYNCHRONOUS,
		.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
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
4b74ff65 MB	2	/*
	3	* fixed.c
	4	*
	5	* Copyright 2008 Wolfson Microelectronics PLC.
	6	*
	7	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	8	*
86d9884b RQ	9	* Copyright (c) 2009 Nokia Corporation
	10	* Roger Quadros <ext-roger.quadros@nokia.com>
	11	*
4b74ff65 MB	12	* This is useful for systems with mixed controllable and
	13	* non-controllable regulators, as well as for allowing testing on
	14	* systems with no controllable regulators.
	15	*/
	16
	17	#include <linux/err.h>
	18	#include <linux/mutex.h>
65602c32	19	#include <linux/module.h>
4b74ff65	20	#include <linux/platform_device.h>
bf3a28cf DB	21	#include <linux/pm_domain.h>
bf3a28cf DB	22	#include <linux/pm_opp.h>
4b74ff65 MB	23	#include <linux/regulator/driver.h>
4b74ff65 MB	24	#include <linux/regulator/fixed.h>
efdfeb07	25	#include <linux/gpio/consumer.h>
5a0e3ad6	26	#include <linux/slab.h>
cef49102	27	#include <linux/of.h>
cef49102 RN	28	#include <linux/regulator/of_regulator.h>
cef49102 RN	29	#include <linux/regulator/machine.h>
8959e532 PS	30	#include <linux/clk.h>
8959e532 PS	31
4b74ff65 MB	32
	33	struct fixed_voltage_data {
	34	struct regulator_desc desc;
	35	struct regulator_dev *dev;
8959e532 PS	36
8959e532 PS	37	struct clk *enable_clock;
bf3a28cf DB	38	unsigned int enable_counter;
bf3a28cf DB	39	int performance_state;
4b74ff65 MB	40	};
4b74ff65 MB	41
8959e532 PS	42	struct fixed_dev_type {
8959e532 PS	43	bool has_enable_clock;
bf3a28cf	44	bool has_performance_state;
8959e532 PS	45	};
8959e532 PS	46
8959e532 PS	47	static int reg_clock_enable(struct regulator_dev *rdev)
	48	{
	49	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
	50	int ret = 0;
	51
	52	ret = clk_prepare_enable(priv->enable_clock);
	53	if (ret)
	54	return ret;
	55
bf3a28cf	56	priv->enable_counter++;
8959e532 PS	57
	58	return ret;
	59	}
	60
	61	static int reg_clock_disable(struct regulator_dev *rdev)
	62	{
	63	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
	64
	65	clk_disable_unprepare(priv->enable_clock);
bf3a28cf	66	priv->enable_counter--;
8959e532 PS	67
	68	return 0;
	69	}
	70
bf3a28cf	71	static int reg_domain_enable(struct regulator_dev *rdev)
8959e532 PS	72	{
8959e532 PS	73	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
bf3a28cf DB	74	struct device *dev = rdev->dev.parent;
	75	int ret;
	76
	77	ret = dev_pm_genpd_set_performance_state(dev, priv->performance_state);
	78	if (ret)
	79	return ret;
8959e532	80
bf3a28cf DB	81	priv->enable_counter++;
	82
	83	return ret;
	84	}
	85
	86	static int reg_domain_disable(struct regulator_dev *rdev)
	87	{
	88	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
	89	struct device *dev = rdev->dev.parent;
855bfff9 AL	90	int ret;
	91
	92	ret = dev_pm_genpd_set_performance_state(dev, 0);
	93	if (ret)
	94	return ret;
bf3a28cf DB	95
	96	priv->enable_counter--;
	97
855bfff9	98	return 0;
bf3a28cf DB	99	}
	100
	101	static int reg_is_enabled(struct regulator_dev *rdev)
	102	{
	103	struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
	104
	105	return priv->enable_counter > 0;
8959e532 PS	106	}
8959e532 PS	107
cef49102 RN	108
	109	/**
	110	* of_get_fixed_voltage_config - extract fixed_voltage_config structure info
	111	* @dev: device requesting for fixed_voltage_config
072e78b1	112	* @desc: regulator description
cef49102 RN	113	*
	114	* Populates fixed_voltage_config structure by extracting data from device
	115	* tree node, returns a pointer to the populated structure of NULL if memory
	116	* alloc fails.
	117	*/
bc91396b	118	static struct fixed_voltage_config *
072e78b1 JMC	119	of_get_fixed_voltage_config(struct device *dev,
072e78b1 JMC	120	const struct regulator_desc *desc)
cef49102 RN	121	{
	122	struct fixed_voltage_config *config;
	123	struct device_node *np = dev->of_node;
cef49102 RN	124	struct regulator_init_data *init_data;
	125
	126	config = devm_kzalloc(dev, sizeof(struct fixed_voltage_config),
	127	GFP_KERNEL);
	128	if (!config)
f141822b	129	return ERR_PTR(-ENOMEM);
cef49102	130
072e78b1	131	config->init_data = of_get_regulator_init_data(dev, dev->of_node, desc);
4b864af1	132	if (!config->init_data)
f141822b	133	return ERR_PTR(-EINVAL);
4b864af1	134
cef49102	135	init_data = config->init_data;
0c437c4a	136	init_data->constraints.apply_uV = 0;
cef49102 RN	137
	138	config->supply_name = init_data->constraints.name;
	139	if (init_data->constraints.min_uV == init_data->constraints.max_uV) {
	140	config->microvolts = init_data->constraints.min_uV;
	141	} else {
	142	dev_err(dev,
	143	"Fixed regulator specified with variable voltages\n");
f141822b	144	return ERR_PTR(-EINVAL);
cef49102 RN	145	}
	146
	147	if (init_data->constraints.boot_on)
	148	config->enabled_at_boot = true;
	149
4127f696	150	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
f7907e57	151	of_property_read_u32(np, "off-on-delay-us", &config->off_on_delay);
cef49102	152
7dda20c9	153	if (of_property_present(np, "vin-supply"))
6be5bfc3 LD	154	config->input_supply = "vin";
6be5bfc3 LD	155
cef49102 RN	156	return config;
	157	}
	158
96ee75ff	159	static const struct regulator_ops fixed_voltage_ops = {
9d442061 MB	160	};
9d442061 MB	161
96ee75ff	162	static const struct regulator_ops fixed_voltage_clkenabled_ops = {
8959e532 PS	163	.enable = reg_clock_enable,
8959e532 PS	164	.disable = reg_clock_disable,
bf3a28cf DB	165	.is_enabled = reg_is_enabled,
	166	};
	167
	168	static const struct regulator_ops fixed_voltage_domain_ops = {
	169	.enable = reg_domain_enable,
	170	.disable = reg_domain_disable,
	171	.is_enabled = reg_is_enabled,
8959e532 PS	172	};
8959e532 PS	173
a5023574	174	static int reg_fixed_voltage_probe(struct platform_device *pdev)
4b74ff65	175	{
8959e532	176	struct device *dev = &pdev->dev;
22d881c0	177	struct fixed_voltage_config *config;
4b74ff65	178	struct fixed_voltage_data *drvdata;
1d6db22f	179	const struct fixed_dev_type *drvtype = of_device_get_match_data(dev);
c172708d	180	struct regulator_config cfg = { };
efdfeb07	181	enum gpiod_flags gflags;
4b74ff65 MB	182	int ret;
4b74ff65 MB	183
072e78b1 JMC	184	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct fixed_voltage_data),
	185	GFP_KERNEL);
	186	if (!drvdata)
	187	return -ENOMEM;
	188
f141822b	189	if (pdev->dev.of_node) {
072e78b1 JMC	190	config = of_get_fixed_voltage_config(&pdev->dev,
072e78b1 JMC	191	&drvdata->desc);
f141822b SW	192	if (IS_ERR(config))
	193	return PTR_ERR(config);
	194	} else {
dff91d0b	195	config = dev_get_platdata(&pdev->dev);
f141822b	196	}
22d881c0 AL	197
	198	if (!config)
	199	return -ENOMEM;
cef49102	200
84d0ffbe MB	201	drvdata->desc.name = devm_kstrdup(&pdev->dev,
	202	config->supply_name,
	203	GFP_KERNEL);
4b74ff65	204	if (drvdata->desc.name == NULL) {
c53ad7fe	205	dev_err(&pdev->dev, "Failed to allocate supply name\n");
84d0ffbe	206	return -ENOMEM;
4b74ff65 MB	207	}
	208	drvdata->desc.type = REGULATOR_VOLTAGE;
	209	drvdata->desc.owner = THIS_MODULE;
8959e532	210
1d6db22f	211	if (drvtype && drvtype->has_enable_clock) {
8959e532 PS	212	drvdata->desc.ops = &fixed_voltage_clkenabled_ops;
	213
	214	drvdata->enable_clock = devm_clk_get(dev, NULL);
	215	if (IS_ERR(drvdata->enable_clock)) {
09dad81e	216	dev_err(dev, "Can't get enable-clock from devicetree\n");
02bcba0b	217	return PTR_ERR(drvdata->enable_clock);
8959e532	218	}
bf3a28cf DB	219	} else if (drvtype && drvtype->has_performance_state) {
	220	drvdata->desc.ops = &fixed_voltage_domain_ops;
	221
	222	drvdata->performance_state = of_get_required_opp_performance_state(dev->of_node, 0);
	223	if (drvdata->performance_state < 0) {
	224	dev_err(dev, "Can't get performance state from devicetree\n");
	225	return drvdata->performance_state;
	226	}
8959e532 PS	227	} else {
	228	drvdata->desc.ops = &fixed_voltage_ops;
	229	}
1c37f8a8	230
3d0f267f	231	drvdata->desc.enable_time = config->startup_delay;
f7907e57	232	drvdata->desc.off_on_delay = config->off_on_delay;
3d0f267f	233
6be5bfc3	234	if (config->input_supply) {
84d0ffbe MB	235	drvdata->desc.supply_name = devm_kstrdup(&pdev->dev,
	236	config->input_supply,
	237	GFP_KERNEL);
6c315afe	238	if (!drvdata->desc.supply_name)
84d0ffbe	239	return -ENOMEM;
6be5bfc3 LD	240	}
6be5bfc3 LD	241
1c37f8a8 SH	242	if (config->microvolts)
1c37f8a8 SH	243	drvdata->desc.n_voltages = 1;
4b74ff65	244
c368e5fc	245	drvdata->desc.fixed_uV = config->microvolts;
9d442061	246
01dc79cd LW	247	/*
01dc79cd LW	248	* The signal will be inverted by the GPIO core if flagged so in the
d3f37233	249	* descriptor.
01dc79cd LW	250	*/
	251	if (config->enabled_at_boot)
	252	gflags = GPIOD_OUT_HIGH;
	253	else
	254	gflags = GPIOD_OUT_LOW;
efdfeb07	255
b0ce7b29 LW	256	/*
	257	* Some fixed regulators share the enable line between two
	258	* regulators which makes it necessary to get a handle on the
	259	* same descriptor for two different consumers. This will get
	260	* the GPIO descriptor, but only the first call will initialize
	261	* it so any flags such as inversion or open drain will only
	262	* be set up by the first caller and assumed identical on the
	263	* next caller.
	264	*
	265	* FIXME: find a better way to deal with this.
	266	*/
	267	gflags \|= GPIOD_FLAGS_BIT_NONEXCLUSIVE;
	268
5e6f3ae5 LW	269	/*
	270	* Do not use devm* here: the regulator core takes over the
	271	* lifecycle management of the GPIO descriptor.
	272	*/
	273	cfg.ena_gpiod = gpiod_get_optional(&pdev->dev, NULL, gflags);
efdfeb07	274	if (IS_ERR(cfg.ena_gpiod))
7740ab84 RC	275	return dev_err_probe(&pdev->dev, PTR_ERR(cfg.ena_gpiod),
7740ab84 RC	276	"can't get GPIO\n");
4b74ff65	277
c172708d MB	278	cfg.dev = &pdev->dev;
	279	cfg.init_data = config->init_data;
	280	cfg.driver_data = drvdata;
	281	cfg.of_node = pdev->dev.of_node;
	282
84d0ffbe MB	283	drvdata->dev = devm_regulator_register(&pdev->dev, &drvdata->desc,
84d0ffbe MB	284	&cfg);
4b74ff65	285	if (IS_ERR(drvdata->dev)) {
d0f95e64 CM	286	ret = dev_err_probe(&pdev->dev, PTR_ERR(drvdata->dev),
	287	"Failed to register regulator: %ld\n",
	288	PTR_ERR(drvdata->dev));
84d0ffbe	289	return ret;
4b74ff65 MB	290	}
	291
	292	platform_set_drvdata(pdev, drvdata);
	293
	294	dev_dbg(&pdev->dev, "%s supplying %duV\n", drvdata->desc.name,
c368e5fc	295	drvdata->desc.fixed_uV);
4b74ff65 MB	296
4b74ff65 MB	297	return 0;
4b74ff65 MB	298	}
4b74ff65 MB	299
cef49102	300	#if defined(CONFIG_OF)
0f037255 JZ	301	static const struct fixed_dev_type fixed_voltage_data = {
	302	.has_enable_clock = false,
	303	};
	304
	305	static const struct fixed_dev_type fixed_clkenable_data = {
	306	.has_enable_clock = true,
	307	};
	308
bf3a28cf DB	309	static const struct fixed_dev_type fixed_domain_data = {
	310	.has_performance_state = true,
	311	};
	312
3d68dfe3	313	static const struct of_device_id fixed_of_match[] = {
8959e532 PS	314	{
	315	.compatible = "regulator-fixed",
	316	.data = &fixed_voltage_data,
	317	},
	318	{
	319	.compatible = "regulator-fixed-clock",
	320	.data = &fixed_clkenable_data,
	321	},
bf3a28cf DB	322	{
	323	.compatible = "regulator-fixed-domain",
	324	.data = &fixed_domain_data,
	325	},
8959e532 PS	326	{
8959e532 PS	327	},
cef49102 RN	328	};
cef49102 RN	329	MODULE_DEVICE_TABLE(of, fixed_of_match);
cef49102 RN	330	#endif
cef49102 RN	331
4b74ff65	332	static struct platform_driver regulator_fixed_voltage_driver = {
8ab3343d	333	.probe = reg_fixed_voltage_probe,
4b74ff65 MB	334	.driver = {
4b74ff65 MB	335	.name = "reg-fixed-voltage",
259b93b2	336	.probe_type = PROBE_PREFER_ASYNCHRONOUS,
abcfaf23	337	.of_match_table = of_match_ptr(fixed_of_match),
4b74ff65 MB	338	},
	339	};
	340
	341	static int __init regulator_fixed_voltage_init(void)
	342	{
	343	return platform_driver_register(&regulator_fixed_voltage_driver);
	344	}
5a1b22be	345	subsys_initcall(regulator_fixed_voltage_init);
4b74ff65 MB	346
	347	static void __exit regulator_fixed_voltage_exit(void)
	348	{
	349	platform_driver_unregister(&regulator_fixed_voltage_driver);
	350	}
	351	module_exit(regulator_fixed_voltage_exit);
	352
	353	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	354	MODULE_DESCRIPTION("Fixed voltage regulator");
	355	MODULE_LICENSE("GPL");
38c53c89	356	MODULE_ALIAS("platform:reg-fixed-voltage");