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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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2 | /* |
3 | * dummy.c | |
4 | * | |
5 | * Copyright 2010 Wolfson Microelectronics PLC. | |
6 | * | |
7 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
8 | * | |
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9 | * This is useful for systems with mixed controllable and |
10 | * non-controllable regulators, as well as for allowing testing on | |
11 | * systems with no controllable regulators. | |
12 | */ | |
13 | ||
14 | #include <linux/err.h> | |
22be053f | 15 | #include <linux/export.h> |
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16 | #include <linux/platform_device.h> |
17 | #include <linux/regulator/driver.h> | |
18 | #include <linux/regulator/machine.h> | |
19 | ||
20 | #include "dummy.h" | |
21 | ||
22 | struct regulator_dev *dummy_regulator_rdev; | |
23 | ||
087c09c2 | 24 | static const struct regulator_init_data dummy_initdata = { |
8669544a MP |
25 | .constraints = { |
26 | .always_on = 1, | |
27 | }, | |
28 | }; | |
34abbd68 | 29 | |
087c09c2 | 30 | static const struct regulator_ops dummy_ops; |
34abbd68 | 31 | |
e1326eff | 32 | static const struct regulator_desc dummy_desc = { |
215b8b05 | 33 | .name = "regulator-dummy", |
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34 | .id = -1, |
35 | .type = REGULATOR_VOLTAGE, | |
36 | .owner = THIS_MODULE, | |
37 | .ops = &dummy_ops, | |
38 | }; | |
39 | ||
a5023574 | 40 | static int dummy_regulator_probe(struct platform_device *pdev) |
c08957a2 | 41 | { |
c172708d | 42 | struct regulator_config config = { }; |
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43 | int ret; |
44 | ||
0f82b6cf | 45 | config.dev = &pdev->dev; |
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46 | config.init_data = &dummy_initdata; |
47 | ||
48 | dummy_regulator_rdev = regulator_register(&dummy_desc, &config); | |
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49 | 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 | ||
58 | static struct platform_driver dummy_regulator_driver = { | |
59 | .probe = dummy_regulator_probe, | |
60 | .driver = { | |
61 | .name = "reg-dummy", | |
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62 | }, |
63 | }; | |
64 | ||
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65 | static struct platform_device *dummy_pdev; |
66 | ||
67 | void __init regulator_dummy_init(void) | |
68 | { | |
69 | int ret; | |
70 | ||
71 | dummy_pdev = platform_device_alloc("reg-dummy", -1); | |
72 | if (!dummy_pdev) { | |
73 | pr_err("Failed to allocate dummy regulator device\n"); | |
74 | return; | |
75 | } | |
76 | ||
77 | ret = platform_device_add(dummy_pdev); | |
78 | if (ret != 0) { | |
79 | pr_err("Failed to register dummy regulator device: %d\n", ret); | |
80 | platform_device_put(dummy_pdev); | |
81 | return; | |
82 | } | |
83 | ||
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84 | ret = platform_driver_register(&dummy_regulator_driver); |
85 | if (ret != 0) { | |
86 | pr_err("Failed to register dummy regulator driver: %d\n", ret); | |
34abbd68 | 87 | platform_device_unregister(dummy_pdev); |
34abbd68 MB |
88 | } |
89 | } |