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1 | /* |
2 | * arizona-ldo1.c -- LDO1 supply for Arizona devices | |
3 | * | |
4 | * Copyright 2012 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/regulator/machine.h> | |
22 | #include <linux/gpio.h> | |
23 | #include <linux/slab.h> | |
24 | ||
25 | #include <linux/mfd/arizona/core.h> | |
26 | #include <linux/mfd/arizona/pdata.h> | |
27 | #include <linux/mfd/arizona/registers.h> | |
28 | ||
29 | struct arizona_ldo1 { | |
30 | struct regulator_dev *regulator; | |
31 | struct arizona *arizona; | |
32 | ||
33 | struct regulator_consumer_supply supply; | |
34 | struct regulator_init_data init_data; | |
35 | }; | |
36 | ||
73ee2946 MB |
37 | static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev, |
38 | unsigned int selector) | |
39 | { | |
40 | if (selector >= rdev->desc->n_voltages) | |
41 | return -EINVAL; | |
42 | ||
43 | if (selector == rdev->desc->n_voltages - 1) | |
44 | return 1800000; | |
45 | else | |
46 | return rdev->desc->min_uV + (rdev->desc->uV_step * selector); | |
47 | } | |
48 | ||
49 | static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev, | |
50 | int min_uV, int max_uV) | |
51 | { | |
52 | int sel; | |
53 | ||
54 | sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step); | |
55 | if (sel >= rdev->desc->n_voltages) | |
56 | sel = rdev->desc->n_voltages - 1; | |
57 | ||
58 | return sel; | |
59 | } | |
60 | ||
61 | static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev, | |
62 | unsigned sel) | |
63 | { | |
64 | struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev); | |
65 | struct regmap *regmap = ldo->arizona->regmap; | |
66 | unsigned int val; | |
67 | int ret; | |
68 | ||
69 | if (sel == rdev->desc->n_voltages - 1) | |
70 | val = ARIZONA_LDO1_HI_PWR; | |
71 | else | |
72 | val = 0; | |
73 | ||
74 | ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2, | |
75 | ARIZONA_LDO1_HI_PWR, val); | |
76 | if (ret != 0) | |
77 | return ret; | |
78 | ||
79 | ret = regmap_update_bits(regmap, ARIZONA_DYNAMIC_FREQUENCY_SCALING_1, | |
80 | ARIZONA_SUBSYS_MAX_FREQ, val); | |
81 | if (ret != 0) | |
82 | return ret; | |
83 | ||
84 | if (val) | |
85 | return 0; | |
86 | ||
87 | val = sel << ARIZONA_LDO1_VSEL_SHIFT; | |
88 | ||
89 | return regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_1, | |
90 | ARIZONA_LDO1_VSEL_MASK, val); | |
91 | } | |
92 | ||
93 | static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev) | |
94 | { | |
95 | struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev); | |
96 | struct regmap *regmap = ldo->arizona->regmap; | |
97 | unsigned int val; | |
98 | int ret; | |
99 | ||
100 | ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val); | |
101 | if (ret != 0) | |
102 | return ret; | |
103 | ||
104 | if (val & ARIZONA_LDO1_HI_PWR) | |
105 | return rdev->desc->n_voltages - 1; | |
106 | ||
107 | ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_1, &val); | |
108 | if (ret != 0) | |
109 | return ret; | |
110 | ||
111 | return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT; | |
112 | } | |
113 | ||
114 | static struct regulator_ops arizona_ldo1_hc_ops = { | |
115 | .list_voltage = arizona_ldo1_hc_list_voltage, | |
116 | .map_voltage = arizona_ldo1_hc_map_voltage, | |
117 | .get_voltage_sel = arizona_ldo1_hc_get_voltage_sel, | |
118 | .set_voltage_sel = arizona_ldo1_hc_set_voltage_sel, | |
119 | .get_bypass = regulator_get_bypass_regmap, | |
120 | .set_bypass = regulator_set_bypass_regmap, | |
121 | }; | |
122 | ||
123 | static const struct regulator_desc arizona_ldo1_hc = { | |
124 | .name = "LDO1", | |
125 | .supply_name = "LDOVDD", | |
126 | .type = REGULATOR_VOLTAGE, | |
127 | .ops = &arizona_ldo1_hc_ops, | |
128 | ||
129 | .bypass_reg = ARIZONA_LDO1_CONTROL_1, | |
130 | .bypass_mask = ARIZONA_LDO1_BYPASS, | |
131 | .min_uV = 900000, | |
132 | .uV_step = 50000, | |
133 | .n_voltages = 8, | |
ce1bcb7e | 134 | .enable_time = 1500, |
73ee2946 MB |
135 | |
136 | .owner = THIS_MODULE, | |
137 | }; | |
138 | ||
1910efa1 MB |
139 | static struct regulator_ops arizona_ldo1_ops = { |
140 | .list_voltage = regulator_list_voltage_linear, | |
141 | .map_voltage = regulator_map_voltage_linear, | |
142 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
143 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
9a17de04 MB |
144 | .get_bypass = regulator_get_bypass_regmap, |
145 | .set_bypass = regulator_set_bypass_regmap, | |
1910efa1 MB |
146 | }; |
147 | ||
148 | static const struct regulator_desc arizona_ldo1 = { | |
149 | .name = "LDO1", | |
150 | .supply_name = "LDOVDD", | |
151 | .type = REGULATOR_VOLTAGE, | |
152 | .ops = &arizona_ldo1_ops, | |
153 | ||
154 | .vsel_reg = ARIZONA_LDO1_CONTROL_1, | |
155 | .vsel_mask = ARIZONA_LDO1_VSEL_MASK, | |
9a17de04 MB |
156 | .bypass_reg = ARIZONA_LDO1_CONTROL_1, |
157 | .bypass_mask = ARIZONA_LDO1_BYPASS, | |
1910efa1 MB |
158 | .min_uV = 900000, |
159 | .uV_step = 50000, | |
8a7f0c61 | 160 | .n_voltages = 7, |
86a14501 | 161 | .enable_time = 500, |
1910efa1 MB |
162 | |
163 | .owner = THIS_MODULE, | |
164 | }; | |
165 | ||
55a18aef MB |
166 | static const struct regulator_init_data arizona_ldo1_dvfs = { |
167 | .constraints = { | |
168 | .min_uV = 1200000, | |
169 | .max_uV = 1800000, | |
170 | .valid_ops_mask = REGULATOR_CHANGE_STATUS | | |
171 | REGULATOR_CHANGE_VOLTAGE, | |
172 | }, | |
173 | .num_consumer_supplies = 1, | |
174 | }; | |
175 | ||
1910efa1 | 176 | static const struct regulator_init_data arizona_ldo1_default = { |
a9905b1d MB |
177 | .constraints = { |
178 | .valid_ops_mask = REGULATOR_CHANGE_STATUS, | |
179 | }, | |
1910efa1 MB |
180 | .num_consumer_supplies = 1, |
181 | }; | |
182 | ||
a5023574 | 183 | static int arizona_ldo1_probe(struct platform_device *pdev) |
1910efa1 MB |
184 | { |
185 | struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); | |
73ee2946 | 186 | const struct regulator_desc *desc; |
1910efa1 MB |
187 | struct regulator_config config = { }; |
188 | struct arizona_ldo1 *ldo1; | |
189 | int ret; | |
190 | ||
191 | ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); | |
192 | if (ldo1 == NULL) { | |
193 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
194 | return -ENOMEM; | |
195 | } | |
196 | ||
197 | ldo1->arizona = arizona; | |
198 | ||
199 | /* | |
200 | * Since the chip usually supplies itself we provide some | |
201 | * default init_data for it. This will be overridden with | |
202 | * platform data if provided. | |
203 | */ | |
55a18aef MB |
204 | switch (arizona->type) { |
205 | case WM5102: | |
73ee2946 | 206 | desc = &arizona_ldo1_hc; |
55a18aef MB |
207 | ldo1->init_data = arizona_ldo1_dvfs; |
208 | break; | |
209 | default: | |
73ee2946 | 210 | desc = &arizona_ldo1; |
55a18aef MB |
211 | ldo1->init_data = arizona_ldo1_default; |
212 | break; | |
213 | } | |
214 | ||
1910efa1 MB |
215 | ldo1->init_data.consumer_supplies = &ldo1->supply; |
216 | ldo1->supply.supply = "DCVDD"; | |
217 | ldo1->supply.dev_name = dev_name(arizona->dev); | |
218 | ||
219 | config.dev = arizona->dev; | |
220 | config.driver_data = ldo1; | |
221 | config.regmap = arizona->regmap; | |
a9905b1d | 222 | config.ena_gpio = arizona->pdata.ldoena; |
1910efa1 MB |
223 | |
224 | if (arizona->pdata.ldo1) | |
225 | config.init_data = arizona->pdata.ldo1; | |
226 | else | |
227 | config.init_data = &ldo1->init_data; | |
228 | ||
73ee2946 | 229 | ldo1->regulator = regulator_register(desc, &config); |
1910efa1 MB |
230 | if (IS_ERR(ldo1->regulator)) { |
231 | ret = PTR_ERR(ldo1->regulator); | |
232 | dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n", | |
233 | ret); | |
234 | return ret; | |
235 | } | |
236 | ||
237 | platform_set_drvdata(pdev, ldo1); | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
8dc995f5 | 242 | static int arizona_ldo1_remove(struct platform_device *pdev) |
1910efa1 MB |
243 | { |
244 | struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev); | |
245 | ||
246 | regulator_unregister(ldo1->regulator); | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | static struct platform_driver arizona_ldo1_driver = { | |
252 | .probe = arizona_ldo1_probe, | |
5eb9f2b9 | 253 | .remove = arizona_ldo1_remove, |
1910efa1 MB |
254 | .driver = { |
255 | .name = "arizona-ldo1", | |
256 | .owner = THIS_MODULE, | |
257 | }, | |
258 | }; | |
259 | ||
260 | module_platform_driver(arizona_ldo1_driver); | |
261 | ||
262 | /* Module information */ | |
263 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
264 | MODULE_DESCRIPTION("Arizona LDO1 driver"); | |
265 | MODULE_LICENSE("GPL"); | |
266 | MODULE_ALIAS("platform:arizona-ldo1"); |