dummy.c revision 22be053fffb0571095f4caadfd185bb44d91ecfa 
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>
19#include <linux/export.h>
20#include <linux/platform_device.h>
21#include <linux/regulator/driver.h>
22#include <linux/regulator/machine.h>
23
24#include "dummy.h"
25
26struct regulator_dev *dummy_regulator_rdev;
27
28static struct regulator_init_data dummy_initdata;
29
30static struct regulator_ops dummy_ops;
31
32static struct regulator_desc dummy_desc = {
33	.name = "dummy",
34	.id = -1,
35	.type = REGULATOR_VOLTAGE,
36	.owner = THIS_MODULE,
37	.ops = &dummy_ops,
38};
39
40static int __devinit dummy_regulator_probe(struct platform_device *pdev)
41{
42	int ret;
43
44	dummy_regulator_rdev = regulator_register(&dummy_desc, NULL,
45						  &dummy_initdata, NULL);
46	if (IS_ERR(dummy_regulator_rdev)) {
47		ret = PTR_ERR(dummy_regulator_rdev);
48		pr_err("Failed to register regulator: %d\n", ret);
49		return ret;
50	}
51
52	return 0;
53}
54
55static struct platform_driver dummy_regulator_driver = {
56	.probe		= dummy_regulator_probe,
57	.driver		= {
58		.name		= "reg-dummy",
59		.owner		= THIS_MODULE,
60	},
61};
62
63static struct platform_device *dummy_pdev;
64
65void __init regulator_dummy_init(void)
66{
67	int ret;
68
69	dummy_pdev = platform_device_alloc("reg-dummy", -1);
70	if (!dummy_pdev) {
71		pr_err("Failed to allocate dummy regulator device\n");
72		return;
73	}
74
75	ret = platform_device_add(dummy_pdev);
76	if (ret != 0) {
77		pr_err("Failed to register dummy regulator device: %d\n", ret);
78		platform_device_put(dummy_pdev);
79		return;
80	}
81
82	ret = platform_driver_register(&dummy_regulator_driver);
83	if (ret != 0) {
84		pr_err("Failed to register dummy regulator driver: %d\n", ret);
85		platform_device_unregister(dummy_pdev);
86	}
87}
88