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1 | /* |
2 | * Regulator driver for the Richtek RT5033 | |
3 | * | |
4 | * Copyright (C) 2014 Samsung Electronics, Co., Ltd. | |
5 | * Author: Beomho Seo <beomho.seo@samsung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published bythe Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/regulator/driver.h> | |
15 | #include <linux/mfd/rt5033.h> | |
16 | #include <linux/mfd/rt5033-private.h> | |
17 | #include <linux/regulator/of_regulator.h> | |
18 | ||
19 | static struct regulator_ops rt5033_safe_ldo_ops = { | |
20 | .is_enabled = regulator_is_enabled_regmap, | |
21 | .enable = regulator_enable_regmap, | |
22 | .disable = regulator_disable_regmap, | |
23 | .list_voltage = regulator_list_voltage_linear, | |
24 | }; | |
25 | ||
26 | static struct regulator_ops rt5033_buck_ops = { | |
27 | .is_enabled = regulator_is_enabled_regmap, | |
28 | .enable = regulator_enable_regmap, | |
29 | .disable = regulator_disable_regmap, | |
30 | .list_voltage = regulator_list_voltage_linear, | |
31 | .map_voltage = regulator_map_voltage_linear, | |
32 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
33 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
34 | }; | |
35 | ||
36 | static const struct regulator_desc rt5033_supported_regulators[] = { | |
37 | [RT5033_BUCK] = { | |
38 | .name = "BUCK", | |
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39 | .of_match = of_match_ptr("BUCK"), |
40 | .regulators_node = of_match_ptr("regulators"), | |
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41 | .id = RT5033_BUCK, |
42 | .ops = &rt5033_buck_ops, | |
43 | .type = REGULATOR_VOLTAGE, | |
44 | .owner = THIS_MODULE, | |
45 | .n_voltages = RT5033_REGULATOR_BUCK_VOLTAGE_STEP_NUM, | |
46 | .min_uV = RT5033_REGULATOR_BUCK_VOLTAGE_MIN, | |
47 | .uV_step = RT5033_REGULATOR_BUCK_VOLTAGE_STEP, | |
48 | .enable_reg = RT5033_REG_CTRL, | |
49 | .enable_mask = RT5033_CTRL_EN_BUCK_MASK, | |
50 | .vsel_reg = RT5033_REG_BUCK_CTRL, | |
51 | .vsel_mask = RT5033_BUCK_CTRL_MASK, | |
52 | }, | |
53 | [RT5033_LDO] = { | |
54 | .name = "LDO", | |
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55 | .of_match = of_match_ptr("LDO"), |
56 | .regulators_node = of_match_ptr("regulators"), | |
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57 | .id = RT5033_LDO, |
58 | .ops = &rt5033_buck_ops, | |
59 | .type = REGULATOR_VOLTAGE, | |
60 | .owner = THIS_MODULE, | |
61 | .n_voltages = RT5033_REGULATOR_LDO_VOLTAGE_STEP_NUM, | |
62 | .min_uV = RT5033_REGULATOR_LDO_VOLTAGE_MIN, | |
63 | .uV_step = RT5033_REGULATOR_LDO_VOLTAGE_STEP, | |
64 | .enable_reg = RT5033_REG_CTRL, | |
65 | .enable_mask = RT5033_CTRL_EN_LDO_MASK, | |
66 | .vsel_reg = RT5033_REG_LDO_CTRL, | |
67 | .vsel_mask = RT5033_LDO_CTRL_MASK, | |
68 | }, | |
69 | [RT5033_SAFE_LDO] = { | |
70 | .name = "SAFE_LDO", | |
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71 | .of_match = of_match_ptr("SAFE_LDO"), |
72 | .regulators_node = of_match_ptr("regulators"), | |
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73 | .id = RT5033_SAFE_LDO, |
74 | .ops = &rt5033_safe_ldo_ops, | |
75 | .type = REGULATOR_VOLTAGE, | |
76 | .owner = THIS_MODULE, | |
77 | .n_voltages = 1, | |
78 | .min_uV = RT5033_REGULATOR_SAFE_LDO_VOLTAGE, | |
79 | .enable_reg = RT5033_REG_CTRL, | |
80 | .enable_mask = RT5033_CTRL_EN_SAFE_LDO_MASK, | |
81 | }, | |
82 | }; | |
83 | ||
84 | static int rt5033_regulator_probe(struct platform_device *pdev) | |
85 | { | |
86 | struct rt5033_dev *rt5033 = dev_get_drvdata(pdev->dev.parent); | |
87 | int ret, i; | |
88 | struct regulator_config config = {}; | |
89 | ||
53aebb7f | 90 | config.dev = rt5033->dev; |
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91 | config.driver_data = rt5033; |
92 | ||
93 | for (i = 0; i < ARRAY_SIZE(rt5033_supported_regulators); i++) { | |
94 | struct regulator_dev *regulator; | |
95 | ||
96 | config.regmap = rt5033->regmap; | |
97 | ||
98 | regulator = devm_regulator_register(&pdev->dev, | |
99 | &rt5033_supported_regulators[i], &config); | |
100 | if (IS_ERR(regulator)) { | |
101 | ret = PTR_ERR(regulator); | |
102 | dev_err(&pdev->dev, | |
103 | "Regulator init failed %d: with error: %d\n", | |
104 | i, ret); | |
105 | return ret; | |
106 | } | |
107 | } | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | static const struct platform_device_id rt5033_regulator_id[] = { | |
113 | { "rt5033-regulator", }, | |
114 | { } | |
115 | }; | |
116 | MODULE_DEVICE_TABLE(platform, rt5033_regulator_id); | |
117 | ||
118 | static struct platform_driver rt5033_regulator_driver = { | |
119 | .driver = { | |
120 | .name = "rt5033-regulator", | |
121 | }, | |
122 | .probe = rt5033_regulator_probe, | |
123 | .id_table = rt5033_regulator_id, | |
124 | }; | |
125 | module_platform_driver(rt5033_regulator_driver); | |
126 | ||
127 | MODULE_DESCRIPTION("Richtek RT5033 Regulator driver"); | |
128 | MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>"); | |
129 | MODULE_LICENSE("GPL"); |