regulator: palmas: implement sleep mode configuration
[linux-2.6.git] / drivers / regulator / dummy.c
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
26 struct regulator_dev *dummy_regulator_rdev;
27
28 static struct regulator_init_data dummy_initdata;
29
30 static struct regulator_ops dummy_ops;
31
32 static 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
40 static 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, 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
55 static struct platform_driver dummy_regulator_driver = {
56         .probe          = dummy_regulator_probe,
57         .driver         = {
58                 .name           = "reg-dummy",
59                 .owner          = THIS_MODULE,
60         },
61 };
62
63 static struct platform_device *dummy_pdev;
64
65 void __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 }