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Mark Brown34abbd62010-02-12 10:18:08 +00001/*
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>
Paul Gortmaker22be0532011-07-17 15:48:22 -040019#include <linux/export.h>
Mark Brown34abbd62010-02-12 10:18:08 +000020#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
Mark Brownc08957a2011-06-07 23:36:18 +010040static int __devinit dummy_regulator_probe(struct platform_device *pdev)
41{
42 int ret;
43
44 dummy_regulator_rdev = regulator_register(&dummy_desc, NULL,
Rajendra Nayak2c043bc2011-11-18 16:47:19 +053045 &dummy_initdata, NULL, NULL);
Mark Brownc08957a2011-06-07 23:36:18 +010046 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
Mark Brown34abbd62010-02-12 10:18:08 +000063static 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
Mark Brownc08957a2011-06-07 23:36:18 +010082 ret = platform_driver_register(&dummy_regulator_driver);
83 if (ret != 0) {
84 pr_err("Failed to register dummy regulator driver: %d\n", ret);
Mark Brown34abbd62010-02-12 10:18:08 +000085 platform_device_unregister(dummy_pdev);
Mark Brown34abbd62010-02-12 10:18:08 +000086 }
87}