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Commit | Line | Data |
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69dc16c3 MB |
1 | /* |
2 | * wm8994-regulator.c -- Regulator driver for the WM8994 | |
3 | * | |
4 | * Copyright 2009 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 modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/moduleparam.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/bitops.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/regulator/driver.h> | |
21 | #include <linux/gpio.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
69dc16c3 MB |
23 | |
24 | #include <linux/mfd/wm8994/core.h> | |
25 | #include <linux/mfd/wm8994/registers.h> | |
26 | #include <linux/mfd/wm8994/pdata.h> | |
27 | ||
28 | struct wm8994_ldo { | |
69dc16c3 MB |
29 | struct regulator_dev *regulator; |
30 | struct wm8994 *wm8994; | |
31 | }; | |
32 | ||
33 | #define WM8994_LDO1_MAX_SELECTOR 0x7 | |
34 | #define WM8994_LDO2_MAX_SELECTOR 0x3 | |
35 | ||
69dc16c3 | 36 | static struct regulator_ops wm8994_ldo1_ops = { |
f2d103ad AL |
37 | .list_voltage = regulator_list_voltage_linear, |
38 | .map_voltage = regulator_map_voltage_linear, | |
633b6fcd MB |
39 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
40 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
69dc16c3 MB |
41 | }; |
42 | ||
43 | static int wm8994_ldo2_list_voltage(struct regulator_dev *rdev, | |
44 | unsigned int selector) | |
45 | { | |
5a7743ed MB |
46 | struct wm8994_ldo *ldo = rdev_get_drvdata(rdev); |
47 | ||
69dc16c3 MB |
48 | if (selector > WM8994_LDO2_MAX_SELECTOR) |
49 | return -EINVAL; | |
50 | ||
5a7743ed MB |
51 | switch (ldo->wm8994->type) { |
52 | case WM8994: | |
53 | return (selector * 100000) + 900000; | |
54 | case WM8958: | |
55 | return (selector * 100000) + 1000000; | |
a1ff89ef MB |
56 | case WM1811: |
57 | switch (selector) { | |
58 | case 0: | |
59 | return -EINVAL; | |
60 | default: | |
61 | return (selector * 100000) + 950000; | |
62 | } | |
63 | break; | |
5a7743ed MB |
64 | default: |
65 | return -EINVAL; | |
66 | } | |
69dc16c3 MB |
67 | } |
68 | ||
69dc16c3 | 69 | static struct regulator_ops wm8994_ldo2_ops = { |
69dc16c3 | 70 | .list_voltage = wm8994_ldo2_list_voltage, |
633b6fcd MB |
71 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
72 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
69dc16c3 MB |
73 | }; |
74 | ||
25e4d602 | 75 | static const struct regulator_desc wm8994_ldo_desc[] = { |
69dc16c3 MB |
76 | { |
77 | .name = "LDO1", | |
78 | .id = 1, | |
79 | .type = REGULATOR_VOLTAGE, | |
80 | .n_voltages = WM8994_LDO1_MAX_SELECTOR + 1, | |
633b6fcd MB |
81 | .vsel_reg = WM8994_LDO_1, |
82 | .vsel_mask = WM8994_LDO1_VSEL_MASK, | |
69dc16c3 | 83 | .ops = &wm8994_ldo1_ops, |
f2d103ad AL |
84 | .min_uV = 2400000, |
85 | .uV_step = 100000, | |
00581b30 | 86 | .enable_time = 3000, |
69dc16c3 MB |
87 | .owner = THIS_MODULE, |
88 | }, | |
89 | { | |
90 | .name = "LDO2", | |
91 | .id = 2, | |
92 | .type = REGULATOR_VOLTAGE, | |
93 | .n_voltages = WM8994_LDO2_MAX_SELECTOR + 1, | |
633b6fcd MB |
94 | .vsel_reg = WM8994_LDO_2, |
95 | .vsel_mask = WM8994_LDO2_VSEL_MASK, | |
69dc16c3 | 96 | .ops = &wm8994_ldo2_ops, |
00581b30 | 97 | .enable_time = 3000, |
69dc16c3 MB |
98 | .owner = THIS_MODULE, |
99 | }, | |
100 | }; | |
101 | ||
a5023574 | 102 | static int wm8994_ldo_probe(struct platform_device *pdev) |
69dc16c3 MB |
103 | { |
104 | struct wm8994 *wm8994 = dev_get_drvdata(pdev->dev.parent); | |
105 | struct wm8994_pdata *pdata = wm8994->dev->platform_data; | |
106 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); | |
c172708d | 107 | struct regulator_config config = { }; |
69dc16c3 MB |
108 | struct wm8994_ldo *ldo; |
109 | int ret; | |
110 | ||
111 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
112 | ||
b9e0348f | 113 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm8994_ldo), GFP_KERNEL); |
69dc16c3 MB |
114 | if (ldo == NULL) { |
115 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
116 | return -ENOMEM; | |
117 | } | |
118 | ||
119 | ldo->wm8994 = wm8994; | |
120 | ||
5d0526ea | 121 | config.dev = wm8994->dev; |
c172708d | 122 | config.driver_data = ldo; |
633b6fcd | 123 | config.regmap = wm8994->regmap; |
495fd8c8 | 124 | if (pdata) { |
b68b45d7 | 125 | config.init_data = pdata->ldo[id].init_data; |
495fd8c8 MB |
126 | config.ena_gpio = pdata->ldo[id].enable; |
127 | } | |
c172708d MB |
128 | |
129 | ldo->regulator = regulator_register(&wm8994_ldo_desc[id], &config); | |
69dc16c3 MB |
130 | if (IS_ERR(ldo->regulator)) { |
131 | ret = PTR_ERR(ldo->regulator); | |
132 | dev_err(wm8994->dev, "Failed to register LDO%d: %d\n", | |
133 | id + 1, ret); | |
495fd8c8 | 134 | goto err; |
69dc16c3 MB |
135 | } |
136 | ||
137 | platform_set_drvdata(pdev, ldo); | |
138 | ||
139 | return 0; | |
140 | ||
69dc16c3 | 141 | err: |
69dc16c3 MB |
142 | return ret; |
143 | } | |
144 | ||
8dc995f5 | 145 | static int wm8994_ldo_remove(struct platform_device *pdev) |
69dc16c3 MB |
146 | { |
147 | struct wm8994_ldo *ldo = platform_get_drvdata(pdev); | |
148 | ||
598b3578 DT |
149 | platform_set_drvdata(pdev, NULL); |
150 | ||
69dc16c3 | 151 | regulator_unregister(ldo->regulator); |
69dc16c3 MB |
152 | |
153 | return 0; | |
154 | } | |
155 | ||
156 | static struct platform_driver wm8994_ldo_driver = { | |
157 | .probe = wm8994_ldo_probe, | |
5eb9f2b9 | 158 | .remove = wm8994_ldo_remove, |
69dc16c3 MB |
159 | .driver = { |
160 | .name = "wm8994-ldo", | |
598b3578 | 161 | .owner = THIS_MODULE, |
69dc16c3 MB |
162 | }, |
163 | }; | |
164 | ||
05650216 | 165 | module_platform_driver(wm8994_ldo_driver); |
69dc16c3 MB |
166 | |
167 | /* Module information */ | |
168 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
169 | MODULE_DESCRIPTION("WM8994 LDO driver"); | |
170 | MODULE_LICENSE("GPL"); | |
171 | MODULE_ALIAS("platform:wm8994-ldo"); |