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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{
Mark Brownc1727082012-04-04 00:50:22 +010042 struct regulator_config config = { };
Mark Brownc08957a2011-06-07 23:36:18 +010043 int ret;
44
Mark Brown0f82b6c2012-05-08 18:08:43 +010045 config.dev = &pdev->dev;
Mark Brownc1727082012-04-04 00:50:22 +010046 config.init_data = &dummy_initdata;
47
48 dummy_regulator_rdev = regulator_register(&dummy_desc, &config);
Mark Brownc08957a2011-06-07 23:36:18 +010049 if (IS_ERR(dummy_regulator_rdev)) {
50 ret = PTR_ERR(dummy_regulator_rdev);
51 pr_err("Failed to register regulator: %d\n", ret);
52 return ret;
53 }
54
55 return 0;
56}
57
58static struct platform_driver dummy_regulator_driver = {
59 .probe = dummy_regulator_probe,
60 .driver = {
61 .name = "reg-dummy",
62 .owner = THIS_MODULE,
63 },
64};
65
Mark Brown34abbd62010-02-12 10:18:08 +000066static struct platform_device *dummy_pdev;
67
68void __init regulator_dummy_init(void)
69{
70 int ret;
71
72 dummy_pdev = platform_device_alloc("reg-dummy", -1);
73 if (!dummy_pdev) {
74 pr_err("Failed to allocate dummy regulator device\n");
75 return;
76 }
77
78 ret = platform_device_add(dummy_pdev);
79 if (ret != 0) {
80 pr_err("Failed to register dummy regulator device: %d\n", ret);
81 platform_device_put(dummy_pdev);
82 return;
83 }
84
Mark Brownc08957a2011-06-07 23:36:18 +010085 ret = platform_driver_register(&dummy_regulator_driver);
86 if (ret != 0) {
87 pr_err("Failed to register dummy regulator driver: %d\n", ret);
Mark Brown34abbd62010-02-12 10:18:08 +000088 platform_device_unregister(dummy_pdev);
Mark Brown34abbd62010-02-12 10:18:08 +000089 }
90}