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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/platform_device.h> | |
20 | #include <linux/regulator/driver.h> | |
21 | #include <linux/regulator/machine.h> | |
22 | ||
23 | #include "dummy.h" | |
24 | ||
25 | struct regulator_dev *dummy_regulator_rdev; | |
26 | ||
27 | static struct regulator_init_data dummy_initdata; | |
28 | ||
29 | static struct regulator_ops dummy_ops; | |
30 | ||
31 | static struct regulator_desc dummy_desc = { | |
32 | .name = "dummy", | |
33 | .id = -1, | |
34 | .type = REGULATOR_VOLTAGE, | |
35 | .owner = THIS_MODULE, | |
36 | .ops = &dummy_ops, | |
37 | }; | |
38 | ||
39 | static struct platform_device *dummy_pdev; | |
40 | ||
41 | void __init regulator_dummy_init(void) | |
42 | { | |
43 | int ret; | |
44 | ||
45 | dummy_pdev = platform_device_alloc("reg-dummy", -1); | |
46 | if (!dummy_pdev) { | |
47 | pr_err("Failed to allocate dummy regulator device\n"); | |
48 | return; | |
49 | } | |
50 | ||
51 | ret = platform_device_add(dummy_pdev); | |
52 | if (ret != 0) { | |
53 | pr_err("Failed to register dummy regulator device: %d\n", ret); | |
54 | platform_device_put(dummy_pdev); | |
55 | return; | |
56 | } | |
57 | ||
58 | dummy_regulator_rdev = regulator_register(&dummy_desc, NULL, | |
59 | &dummy_initdata, NULL); | |
60 | if (IS_ERR(dummy_regulator_rdev)) { | |
61 | ret = PTR_ERR(dummy_regulator_rdev); | |
62 | pr_err("Failed to register regulator: %d\n", ret); | |
63 | platform_device_unregister(dummy_pdev); | |
64 | return; | |
65 | } | |
66 | } |