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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
Markus Pargmann86695442014-02-25 11:03:46 +010028static struct regulator_init_data dummy_initdata = {
29 .constraints = {
30 .always_on = 1,
31 },
32};
Mark Brown34abbd62010-02-12 10:18:08 +000033
34static struct regulator_ops dummy_ops;
35
36static struct regulator_desc dummy_desc = {
Uwe Kleine-König215b8b02012-08-07 21:01:37 +020037 .name = "regulator-dummy",
Mark Brown34abbd62010-02-12 10:18:08 +000038 .id = -1,
39 .type = REGULATOR_VOLTAGE,
40 .owner = THIS_MODULE,
41 .ops = &dummy_ops,
42};
43
Bill Pembertona5023572012-11-19 13:22:22 -050044static int dummy_regulator_probe(struct platform_device *pdev)
Mark Brownc08957a2011-06-07 23:36:18 +010045{
Mark Brownc1727082012-04-04 00:50:22 +010046 struct regulator_config config = { };
Mark Brownc08957a2011-06-07 23:36:18 +010047 int ret;
48
Mark Brown0f82b6c2012-05-08 18:08:43 +010049 config.dev = &pdev->dev;
Mark Brownc1727082012-04-04 00:50:22 +010050 config.init_data = &dummy_initdata;
51
52 dummy_regulator_rdev = regulator_register(&dummy_desc, &config);
Mark Brownc08957a2011-06-07 23:36:18 +010053 if (IS_ERR(dummy_regulator_rdev)) {
54 ret = PTR_ERR(dummy_regulator_rdev);
55 pr_err("Failed to register regulator: %d\n", ret);
56 return ret;
57 }
58
59 return 0;
60}
61
62static struct platform_driver dummy_regulator_driver = {
63 .probe = dummy_regulator_probe,
64 .driver = {
65 .name = "reg-dummy",
66 .owner = THIS_MODULE,
67 },
68};
69
Mark Brown34abbd62010-02-12 10:18:08 +000070static struct platform_device *dummy_pdev;
71
72void __init regulator_dummy_init(void)
73{
74 int ret;
75
76 dummy_pdev = platform_device_alloc("reg-dummy", -1);
77 if (!dummy_pdev) {
78 pr_err("Failed to allocate dummy regulator device\n");
79 return;
80 }
81
82 ret = platform_device_add(dummy_pdev);
83 if (ret != 0) {
84 pr_err("Failed to register dummy regulator device: %d\n", ret);
85 platform_device_put(dummy_pdev);
86 return;
87 }
88
Mark Brownc08957a2011-06-07 23:36:18 +010089 ret = platform_driver_register(&dummy_regulator_driver);
90 if (ret != 0) {
91 pr_err("Failed to register dummy regulator driver: %d\n", ret);
Mark Brown34abbd62010-02-12 10:18:08 +000092 platform_device_unregister(dummy_pdev);
Mark Brown34abbd62010-02-12 10:18:08 +000093 }
94}