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
25struct regulator_dev *dummy_regulator_rdev;
26
27static struct regulator_init_data dummy_initdata;
 
 
 
 
28
29static struct regulator_ops dummy_ops;
30
31static 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
39static int __devinit dummy_regulator_probe(struct platform_device *pdev)
40{
 
41	int ret;
42
43	dummy_regulator_rdev = regulator_register(&dummy_desc, NULL,
44						  &dummy_initdata, NULL);
 
 
45	if (IS_ERR(dummy_regulator_rdev)) {
46		ret = PTR_ERR(dummy_regulator_rdev);
47		pr_err("Failed to register regulator: %d\n", ret);
48		return ret;
49	}
50
51	return 0;
52}
53
54static struct platform_driver dummy_regulator_driver = {
55	.probe		= dummy_regulator_probe,
56	.driver		= {
57		.name		= "reg-dummy",
58		.owner		= THIS_MODULE,
59	},
60};
61
62static struct platform_device *dummy_pdev;
63
64void __init regulator_dummy_init(void)
65{
66	int ret;
67
68	dummy_pdev = platform_device_alloc("reg-dummy", -1);
69	if (!dummy_pdev) {
70		pr_err("Failed to allocate dummy regulator device\n");
71		return;
72	}
73
74	ret = platform_device_add(dummy_pdev);
75	if (ret != 0) {
76		pr_err("Failed to register dummy regulator device: %d\n", ret);
77		platform_device_put(dummy_pdev);
78		return;
79	}
80
81	ret = platform_driver_register(&dummy_regulator_driver);
82	if (ret != 0) {
83		pr_err("Failed to register dummy regulator driver: %d\n", ret);
84		platform_device_unregister(dummy_pdev);
85	}
86}

 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
26struct regulator_dev *dummy_regulator_rdev;
27
28static struct regulator_init_data dummy_initdata = {
29	.constraints = {
30		.always_on = 1,
31	},
32};
33
34static struct regulator_ops dummy_ops;
35
36static const struct regulator_desc dummy_desc = {
37	.name = "regulator-dummy",
38	.id = -1,
39	.type = REGULATOR_VOLTAGE,
40	.owner = THIS_MODULE,
41	.ops = &dummy_ops,
42};
43
44static int dummy_regulator_probe(struct platform_device *pdev)
45{
46	struct regulator_config config = { };
47	int ret;
48
49	config.dev = &pdev->dev;
50	config.init_data = &dummy_initdata;
51
52	dummy_regulator_rdev = regulator_register(&dummy_desc, &config);
53	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	},
67};
68
69static struct platform_device *dummy_pdev;
70
71void __init regulator_dummy_init(void)
72{
73	int ret;
74
75	dummy_pdev = platform_device_alloc("reg-dummy", -1);
76	if (!dummy_pdev) {
77		pr_err("Failed to allocate dummy regulator device\n");
78		return;
79	}
80
81	ret = platform_device_add(dummy_pdev);
82	if (ret != 0) {
83		pr_err("Failed to register dummy regulator device: %d\n", ret);
84		platform_device_put(dummy_pdev);
85		return;
86	}
87
88	ret = platform_driver_register(&dummy_regulator_driver);
89	if (ret != 0) {
90		pr_err("Failed to register dummy regulator driver: %d\n", ret);
91		platform_device_unregister(dummy_pdev);
92	}
93}