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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> | |
e3d27775 | 21 | #include <linux/regulator/machine.h> |
69dc16c3 | 22 | #include <linux/gpio.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
69dc16c3 MB |
24 | |
25 | #include <linux/mfd/wm8994/core.h> | |
26 | #include <linux/mfd/wm8994/registers.h> | |
27 | #include <linux/mfd/wm8994/pdata.h> | |
28 | ||
29 | struct wm8994_ldo { | |
69dc16c3 MB |
30 | struct regulator_dev *regulator; |
31 | struct wm8994 *wm8994; | |
e3d27775 MB |
32 | struct regulator_consumer_supply supply; |
33 | struct regulator_init_data init_data; | |
69dc16c3 MB |
34 | }; |
35 | ||
36 | #define WM8994_LDO1_MAX_SELECTOR 0x7 | |
37 | #define WM8994_LDO2_MAX_SELECTOR 0x3 | |
38 | ||
69dc16c3 | 39 | static struct regulator_ops wm8994_ldo1_ops = { |
f2d103ad AL |
40 | .list_voltage = regulator_list_voltage_linear, |
41 | .map_voltage = regulator_map_voltage_linear, | |
633b6fcd MB |
42 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
43 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
69dc16c3 MB |
44 | }; |
45 | ||
46 | static int wm8994_ldo2_list_voltage(struct regulator_dev *rdev, | |
47 | unsigned int selector) | |
48 | { | |
5a7743ed MB |
49 | struct wm8994_ldo *ldo = rdev_get_drvdata(rdev); |
50 | ||
69dc16c3 MB |
51 | if (selector > WM8994_LDO2_MAX_SELECTOR) |
52 | return -EINVAL; | |
53 | ||
5a7743ed MB |
54 | switch (ldo->wm8994->type) { |
55 | case WM8994: | |
56 | return (selector * 100000) + 900000; | |
57 | case WM8958: | |
58 | return (selector * 100000) + 1000000; | |
a1ff89ef MB |
59 | case WM1811: |
60 | switch (selector) { | |
61 | case 0: | |
62 | return -EINVAL; | |
63 | default: | |
64 | return (selector * 100000) + 950000; | |
65 | } | |
66 | break; | |
5a7743ed MB |
67 | default: |
68 | return -EINVAL; | |
69 | } | |
69dc16c3 MB |
70 | } |
71 | ||
69dc16c3 | 72 | static struct regulator_ops wm8994_ldo2_ops = { |
69dc16c3 | 73 | .list_voltage = wm8994_ldo2_list_voltage, |
633b6fcd MB |
74 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
75 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
69dc16c3 MB |
76 | }; |
77 | ||
25e4d602 | 78 | static const struct regulator_desc wm8994_ldo_desc[] = { |
69dc16c3 MB |
79 | { |
80 | .name = "LDO1", | |
81 | .id = 1, | |
82 | .type = REGULATOR_VOLTAGE, | |
83 | .n_voltages = WM8994_LDO1_MAX_SELECTOR + 1, | |
633b6fcd MB |
84 | .vsel_reg = WM8994_LDO_1, |
85 | .vsel_mask = WM8994_LDO1_VSEL_MASK, | |
69dc16c3 | 86 | .ops = &wm8994_ldo1_ops, |
f2d103ad AL |
87 | .min_uV = 2400000, |
88 | .uV_step = 100000, | |
00581b30 | 89 | .enable_time = 3000, |
69dc16c3 MB |
90 | .owner = THIS_MODULE, |
91 | }, | |
92 | { | |
93 | .name = "LDO2", | |
94 | .id = 2, | |
95 | .type = REGULATOR_VOLTAGE, | |
96 | .n_voltages = WM8994_LDO2_MAX_SELECTOR + 1, | |
633b6fcd MB |
97 | .vsel_reg = WM8994_LDO_2, |
98 | .vsel_mask = WM8994_LDO2_VSEL_MASK, | |
69dc16c3 | 99 | .ops = &wm8994_ldo2_ops, |
00581b30 | 100 | .enable_time = 3000, |
69dc16c3 MB |
101 | .owner = THIS_MODULE, |
102 | }, | |
103 | }; | |
104 | ||
e3d27775 MB |
105 | static const struct regulator_consumer_supply wm8994_ldo_consumer[] = { |
106 | { .supply = "AVDD1" }, | |
107 | { .supply = "DCVDD" }, | |
108 | }; | |
109 | ||
110 | static const struct regulator_init_data wm8994_ldo_default[] = { | |
111 | { | |
112 | .constraints = { | |
113 | .valid_ops_mask = REGULATOR_CHANGE_STATUS, | |
114 | }, | |
115 | .num_consumer_supplies = 1, | |
116 | }, | |
117 | { | |
118 | .constraints = { | |
119 | .valid_ops_mask = REGULATOR_CHANGE_STATUS, | |
120 | }, | |
121 | .num_consumer_supplies = 1, | |
122 | }, | |
123 | }; | |
124 | ||
a5023574 | 125 | static int wm8994_ldo_probe(struct platform_device *pdev) |
69dc16c3 MB |
126 | { |
127 | struct wm8994 *wm8994 = dev_get_drvdata(pdev->dev.parent); | |
dff91d0b | 128 | struct wm8994_pdata *pdata = dev_get_platdata(wm8994->dev); |
69dc16c3 | 129 | int id = pdev->id % ARRAY_SIZE(pdata->ldo); |
c172708d | 130 | struct regulator_config config = { }; |
69dc16c3 MB |
131 | struct wm8994_ldo *ldo; |
132 | int ret; | |
133 | ||
134 | dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); | |
135 | ||
b9e0348f | 136 | ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm8994_ldo), GFP_KERNEL); |
69dc16c3 MB |
137 | if (ldo == NULL) { |
138 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
139 | return -ENOMEM; | |
140 | } | |
141 | ||
142 | ldo->wm8994 = wm8994; | |
e3d27775 MB |
143 | ldo->supply = wm8994_ldo_consumer[id]; |
144 | ldo->supply.dev_name = dev_name(wm8994->dev); | |
69dc16c3 | 145 | |
5d0526ea | 146 | config.dev = wm8994->dev; |
c172708d | 147 | config.driver_data = ldo; |
633b6fcd | 148 | config.regmap = wm8994->regmap; |
e3d27775 MB |
149 | config.init_data = &ldo->init_data; |
150 | if (pdata) | |
495fd8c8 | 151 | config.ena_gpio = pdata->ldo[id].enable; |
3ea93896 SN |
152 | else if (wm8994->dev->of_node) |
153 | config.ena_gpio = wm8994->pdata.ldo[id].enable; | |
e3d27775 MB |
154 | |
155 | /* Use default constraints if none set up */ | |
3ea93896 | 156 | if (!pdata || !pdata->ldo[id].init_data || wm8994->dev->of_node) { |
e3d27775 MB |
157 | dev_dbg(wm8994->dev, "Using default init data, supply %s %s\n", |
158 | ldo->supply.dev_name, ldo->supply.supply); | |
159 | ||
160 | ldo->init_data = wm8994_ldo_default[id]; | |
161 | ldo->init_data.consumer_supplies = &ldo->supply; | |
162 | if (!config.ena_gpio) | |
163 | ldo->init_data.constraints.valid_ops_mask = 0; | |
164 | } else { | |
165 | ldo->init_data = *pdata->ldo[id].init_data; | |
495fd8c8 | 166 | } |
c172708d MB |
167 | |
168 | ldo->regulator = regulator_register(&wm8994_ldo_desc[id], &config); | |
69dc16c3 MB |
169 | if (IS_ERR(ldo->regulator)) { |
170 | ret = PTR_ERR(ldo->regulator); | |
171 | dev_err(wm8994->dev, "Failed to register LDO%d: %d\n", | |
172 | id + 1, ret); | |
495fd8c8 | 173 | goto err; |
69dc16c3 MB |
174 | } |
175 | ||
176 | platform_set_drvdata(pdev, ldo); | |
177 | ||
178 | return 0; | |
179 | ||
69dc16c3 | 180 | err: |
69dc16c3 MB |
181 | return ret; |
182 | } | |
183 | ||
8dc995f5 | 184 | static int wm8994_ldo_remove(struct platform_device *pdev) |
69dc16c3 MB |
185 | { |
186 | struct wm8994_ldo *ldo = platform_get_drvdata(pdev); | |
187 | ||
188 | regulator_unregister(ldo->regulator); | |
69dc16c3 MB |
189 | |
190 | return 0; | |
191 | } | |
192 | ||
193 | static struct platform_driver wm8994_ldo_driver = { | |
194 | .probe = wm8994_ldo_probe, | |
5eb9f2b9 | 195 | .remove = wm8994_ldo_remove, |
69dc16c3 MB |
196 | .driver = { |
197 | .name = "wm8994-ldo", | |
598b3578 | 198 | .owner = THIS_MODULE, |
69dc16c3 MB |
199 | }, |
200 | }; | |
201 | ||
05650216 | 202 | module_platform_driver(wm8994_ldo_driver); |
69dc16c3 MB |
203 | |
204 | /* Module information */ | |
205 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
206 | MODULE_DESCRIPTION("WM8994 LDO driver"); | |
207 | MODULE_LICENSE("GPL"); | |
208 | MODULE_ALIAS("platform:wm8994-ldo"); |