[mirror_ubuntu-artful-kernel.git] / drivers / regulator / dummy.c

/*
 * dummy.c
 *
 * Copyright 2010 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.
 *
 * 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/export.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>

#include "dummy.h"

struct regulator_dev *dummy_regulator_rdev;

static struct regulator_init_data dummy_initdata = {
	.constraints = {
		.always_on = 1,
	},
};

static struct regulator_ops dummy_ops;

static const struct regulator_desc dummy_desc = {
	.name = "regulator-dummy",
	.id = -1,
	.type = REGULATOR_VOLTAGE,
	.owner = THIS_MODULE,
	.ops = &dummy_ops,
};

static int dummy_regulator_probe(struct platform_device *pdev)
{
	struct regulator_config config = { };
	int ret;

	config.dev = &pdev->dev;
	config.init_data = &dummy_initdata;

	dummy_regulator_rdev = regulator_register(&dummy_desc, &config);
	if (IS_ERR(dummy_regulator_rdev)) {
		ret = PTR_ERR(dummy_regulator_rdev);
		pr_err("Failed to register regulator: %d\n", ret);
		return ret;
	}

	return 0;
}

static struct platform_driver dummy_regulator_driver = {
	.probe		= dummy_regulator_probe,
	.driver		= {
		.name		= "reg-dummy",
	},
};

static struct platform_device *dummy_pdev;

void __init regulator_dummy_init(void)
{
	int ret;

	dummy_pdev = platform_device_alloc("reg-dummy", -1);
	if (!dummy_pdev) {
		pr_err("Failed to allocate dummy regulator device\n");
		return;
	}

	ret = platform_device_add(dummy_pdev);
	if (ret != 0) {
		pr_err("Failed to register dummy regulator device: %d\n", ret);
		platform_device_put(dummy_pdev);
		return;
	}

	ret = platform_driver_register(&dummy_regulator_driver);
	if (ret != 0) {
		pr_err("Failed to register dummy regulator driver: %d\n", ret);
		platform_device_unregister(dummy_pdev);
	}
}
Commit	Line	Data
34abbd68 MB	1	/*
	2	* dummy.c
	3	*
	4	* Copyright 2010 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	* This is useful for systems with mixed controllable and
	14	* non-controllable regulators, as well as for allowing testing on
	15	* systems with no controllable regulators.
	16	*/
	17
	18	#include <linux/err.h>
22be053f	19	#include <linux/export.h>
34abbd68 MB	20	#include <linux/platform_device.h>
	21	#include <linux/regulator/driver.h>
	22	#include <linux/regulator/machine.h>
	23
	24	#include "dummy.h"
	25
	26	struct regulator_dev *dummy_regulator_rdev;
	27
8669544a MP	28	static struct regulator_init_data dummy_initdata = {
	29	.constraints = {
	30	.always_on = 1,
	31	},
	32	};
34abbd68 MB	33
	34	static struct regulator_ops dummy_ops;
	35
e1326eff	36	static const struct regulator_desc dummy_desc = {
215b8b05	37	.name = "regulator-dummy",
34abbd68 MB	38	.id = -1,
	39	.type = REGULATOR_VOLTAGE,
	40	.owner = THIS_MODULE,
	41	.ops = &dummy_ops,
	42	};
	43
a5023574	44	static int dummy_regulator_probe(struct platform_device *pdev)
c08957a2	45	{
c172708d	46	struct regulator_config config = { };
c08957a2 MB	47	int ret;
c08957a2 MB	48
0f82b6cf	49	config.dev = &pdev->dev;
c172708d MB	50	config.init_data = &dummy_initdata;
	51
	52	dummy_regulator_rdev = regulator_register(&dummy_desc, &config);
c08957a2 MB	53	if (IS_ERR(dummy_regulator_rdev)) {
	54	ret = PTR_ERR(dummy_regulator_rdev);
	55	pr_err("Failed to register regulator: %d\n", ret);
	56	return ret;
	57	}
	58
	59	return 0;
	60	}
	61
	62	static struct platform_driver dummy_regulator_driver = {
	63	.probe = dummy_regulator_probe,
	64	.driver = {
	65	.name = "reg-dummy",
c08957a2 MB	66	},
	67	};
	68
34abbd68 MB	69	static struct platform_device *dummy_pdev;
	70
	71	void __init regulator_dummy_init(void)
	72	{
	73	int ret;
	74
	75	dummy_pdev = platform_device_alloc("reg-dummy", -1);
	76	if (!dummy_pdev) {
	77	pr_err("Failed to allocate dummy regulator device\n");
	78	return;
	79	}
	80
	81	ret = platform_device_add(dummy_pdev);
	82	if (ret != 0) {
	83	pr_err("Failed to register dummy regulator device: %d\n", ret);
	84	platform_device_put(dummy_pdev);
	85	return;
	86	}
	87
c08957a2 MB	88	ret = platform_driver_register(&dummy_regulator_driver);
	89	if (ret != 0) {
	90	pr_err("Failed to register dummy regulator driver: %d\n", ret);
34abbd68	91	platform_device_unregister(dummy_pdev);
34abbd68 MB	92	}
34abbd68 MB	93	}