wm8400-regulator.c (178e43aef2979525d7864daefd9499614e13800e) wm8400-regulator.c (c54a155d4d20e35d41bb2922ed4a6c615d177c4f)
1/*
2 * Regulator support for WM8400
3 *
4 * Copyright 2008 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

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14
15#include <linux/bug.h>
16#include <linux/err.h>
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/regulator/driver.h>
20#include <linux/mfd/wm8400-private.h>
21
1/*
2 * Regulator support for WM8400
3 *
4 * Copyright 2008 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

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14
15#include <linux/bug.h>
16#include <linux/err.h>
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/regulator/driver.h>
20#include <linux/mfd/wm8400-private.h>
21
22static int wm8400_ldo_is_enabled(struct regulator_dev *dev)
23{
24 struct wm8400 *wm8400 = rdev_get_drvdata(dev);
25 u16 val;
26
27 val = wm8400_reg_read(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev));
28 return (val & WM8400_LDO1_ENA) != 0;
29}
30
31static int wm8400_ldo_enable(struct regulator_dev *dev)
32{
33 struct wm8400 *wm8400 = rdev_get_drvdata(dev);
34
35 return wm8400_set_bits(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev),
36 WM8400_LDO1_ENA, WM8400_LDO1_ENA);
37}
38
39static int wm8400_ldo_disable(struct regulator_dev *dev)
40{
41 struct wm8400 *wm8400 = rdev_get_drvdata(dev);
42
43 return wm8400_set_bits(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev),
44 WM8400_LDO1_ENA, 0);
45}
46
47static int wm8400_ldo_list_voltage(struct regulator_dev *dev,
48 unsigned selector)
49{
50 if (selector > WM8400_LDO1_VSEL_MASK)
51 return -EINVAL;
52
53 if (selector < 15)
54 return 900000 + (selector * 50000);
55 else
56 return 1600000 + ((selector - 14) * 100000);
57}
58
22static int wm8400_ldo_list_voltage(struct regulator_dev *dev,
23 unsigned selector)
24{
25 if (selector > WM8400_LDO1_VSEL_MASK)
26 return -EINVAL;
27
28 if (selector < 15)
29 return 900000 + (selector * 50000);
30 else
31 return 1600000 + ((selector - 14) * 100000);
32}
33
59static int wm8400_ldo_get_voltage_sel(struct regulator_dev *dev)
34static int wm8400_ldo_map_voltage(struct regulator_dev *dev,
35 int min_uV, int max_uV)
60{
36{
61 struct wm8400 *wm8400 = rdev_get_drvdata(dev);
62 u16 val;
63
37 u16 val;
38
64 val = wm8400_reg_read(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev));
65 val &= WM8400_LDO1_VSEL_MASK;
66
67 return val;
68}
69
70static int wm8400_ldo_set_voltage(struct regulator_dev *dev,
71 int min_uV, int max_uV, unsigned *selector)
72{
73 struct wm8400 *wm8400 = rdev_get_drvdata(dev);
74 u16 val;
75
76 if (min_uV < 900000 || min_uV > 3300000)
77 return -EINVAL;
78
79 if (min_uV < 1700000) {
80 /* Steps of 50mV from 900mV; */
81 val = DIV_ROUND_UP(min_uV - 900000, 50000);
82
83 if ((val * 50000) + 900000 > max_uV)

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89
90 if ((val * 100000) + 1700000 > max_uV)
91 return -EINVAL;
92 BUG_ON((val * 100000) + 1700000 < min_uV);
93
94 val += 0xf;
95 }
96
39 if (min_uV < 900000 || min_uV > 3300000)
40 return -EINVAL;
41
42 if (min_uV < 1700000) {
43 /* Steps of 50mV from 900mV; */
44 val = DIV_ROUND_UP(min_uV - 900000, 50000);
45
46 if ((val * 50000) + 900000 > max_uV)

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52
53 if ((val * 100000) + 1700000 > max_uV)
54 return -EINVAL;
55 BUG_ON((val * 100000) + 1700000 < min_uV);
56
57 val += 0xf;
58 }
59
97 *selector = val;
98
99 return wm8400_set_bits(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev),
100 WM8400_LDO1_VSEL_MASK, val);
60 return val;
101}
102
103static struct regulator_ops wm8400_ldo_ops = {
61}
62
63static struct regulator_ops wm8400_ldo_ops = {
104 .is_enabled = wm8400_ldo_is_enabled,
105 .enable = wm8400_ldo_enable,
106 .disable = wm8400_ldo_disable,
64 .is_enabled = regulator_is_enabled_regmap,
65 .enable = regulator_enable_regmap,
66 .disable = regulator_disable_regmap,
107 .list_voltage = wm8400_ldo_list_voltage,
67 .list_voltage = wm8400_ldo_list_voltage,
108 .get_voltage_sel = wm8400_ldo_get_voltage_sel,
109 .set_voltage = wm8400_ldo_set_voltage,
68 .get_voltage_sel = regulator_get_voltage_sel_regmap,
69 .set_voltage_sel = regulator_set_voltage_sel_regmap,
70 .map_voltage = wm8400_ldo_map_voltage,
110};
111
71};
72
112static int wm8400_dcdc_is_enabled(struct regulator_dev *dev)
113{
114 struct wm8400 *wm8400 = rdev_get_drvdata(dev);
115 int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
116 u16 val;
117
118 val = wm8400_reg_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset);
119 return (val & WM8400_DC1_ENA) != 0;
120}
121
122static int wm8400_dcdc_enable(struct regulator_dev *dev)
123{
124 struct wm8400 *wm8400 = rdev_get_drvdata(dev);
125 int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
126
127 return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
128 WM8400_DC1_ENA, WM8400_DC1_ENA);
129}
130
131static int wm8400_dcdc_disable(struct regulator_dev *dev)
132{
133 struct wm8400 *wm8400 = rdev_get_drvdata(dev);
134 int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
135
136 return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
137 WM8400_DC1_ENA, 0);
138}
139
140static int wm8400_dcdc_list_voltage(struct regulator_dev *dev,
141 unsigned selector)
142{
143 if (selector > WM8400_DC1_VSEL_MASK)
144 return -EINVAL;
145
146 return 850000 + (selector * 25000);
147}
148
149static int wm8400_dcdc_get_voltage_sel(struct regulator_dev *dev)
150{
151 struct wm8400 *wm8400 = rdev_get_drvdata(dev);
152 u16 val;
153 int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
154
155 val = wm8400_reg_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset);
156 val &= WM8400_DC1_VSEL_MASK;
157
158 return val;
159}
160
161static int wm8400_dcdc_set_voltage(struct regulator_dev *dev,
162 int min_uV, int max_uV, unsigned *selector)
163{
164 struct wm8400 *wm8400 = rdev_get_drvdata(dev);
165 u16 val;
166 int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
167
168 if (min_uV < 850000)
169 return -EINVAL;
170
171 val = DIV_ROUND_UP(min_uV - 850000, 25000);
172
173 if (850000 + (25000 * val) > max_uV)
174 return -EINVAL;
175 BUG_ON(850000 + (25000 * val) < min_uV);
176
177 *selector = val;
178
179 return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
180 WM8400_DC1_VSEL_MASK, val);
181}
182
183static unsigned int wm8400_dcdc_get_mode(struct regulator_dev *dev)
184{
185 struct wm8400 *wm8400 = rdev_get_drvdata(dev);
186 int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
187 u16 data[2];
188 int ret;
189
190 ret = wm8400_block_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset, 2,

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253static unsigned int wm8400_dcdc_get_optimum_mode(struct regulator_dev *dev,
254 int input_uV, int output_uV,
255 int load_uA)
256{
257 return REGULATOR_MODE_NORMAL;
258}
259
260static struct regulator_ops wm8400_dcdc_ops = {
73static unsigned int wm8400_dcdc_get_mode(struct regulator_dev *dev)
74{
75 struct wm8400 *wm8400 = rdev_get_drvdata(dev);
76 int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
77 u16 data[2];
78 int ret;
79
80 ret = wm8400_block_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset, 2,

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143static unsigned int wm8400_dcdc_get_optimum_mode(struct regulator_dev *dev,
144 int input_uV, int output_uV,
145 int load_uA)
146{
147 return REGULATOR_MODE_NORMAL;
148}
149
150static struct regulator_ops wm8400_dcdc_ops = {
261 .is_enabled = wm8400_dcdc_is_enabled,
262 .enable = wm8400_dcdc_enable,
263 .disable = wm8400_dcdc_disable,
264 .list_voltage = wm8400_dcdc_list_voltage,
265 .get_voltage_sel = wm8400_dcdc_get_voltage_sel,
266 .set_voltage = wm8400_dcdc_set_voltage,
151 .is_enabled = regulator_is_enabled_regmap,
152 .enable = regulator_enable_regmap,
153 .disable = regulator_disable_regmap,
154 .list_voltage = regulator_list_voltage_linear,
155 .get_voltage_sel = regulator_get_voltage_sel_regmap,
156 .set_voltage_sel = regulator_set_voltage_sel_regmap,
267 .get_mode = wm8400_dcdc_get_mode,
268 .set_mode = wm8400_dcdc_set_mode,
269 .get_optimum_mode = wm8400_dcdc_get_optimum_mode,
270};
271
272static struct regulator_desc regulators[] = {
273 {
274 .name = "LDO1",
275 .id = WM8400_LDO1,
276 .ops = &wm8400_ldo_ops,
157 .get_mode = wm8400_dcdc_get_mode,
158 .set_mode = wm8400_dcdc_set_mode,
159 .get_optimum_mode = wm8400_dcdc_get_optimum_mode,
160};
161
162static struct regulator_desc regulators[] = {
163 {
164 .name = "LDO1",
165 .id = WM8400_LDO1,
166 .ops = &wm8400_ldo_ops,
167 .enable_reg = WM8400_LDO1_CONTROL,
168 .enable_mask = WM8400_LDO1_ENA,
277 .n_voltages = WM8400_LDO1_VSEL_MASK + 1,
169 .n_voltages = WM8400_LDO1_VSEL_MASK + 1,
170 .vsel_reg = WM8400_LDO1_CONTROL,
171 .vsel_mask = WM8400_LDO1_VSEL_MASK,
278 .type = REGULATOR_VOLTAGE,
279 .owner = THIS_MODULE,
280 },
281 {
282 .name = "LDO2",
283 .id = WM8400_LDO2,
284 .ops = &wm8400_ldo_ops,
172 .type = REGULATOR_VOLTAGE,
173 .owner = THIS_MODULE,
174 },
175 {
176 .name = "LDO2",
177 .id = WM8400_LDO2,
178 .ops = &wm8400_ldo_ops,
179 .enable_reg = WM8400_LDO2_CONTROL,
180 .enable_mask = WM8400_LDO2_ENA,
285 .n_voltages = WM8400_LDO2_VSEL_MASK + 1,
286 .type = REGULATOR_VOLTAGE,
181 .n_voltages = WM8400_LDO2_VSEL_MASK + 1,
182 .type = REGULATOR_VOLTAGE,
183 .vsel_reg = WM8400_LDO2_CONTROL,
184 .vsel_mask = WM8400_LDO2_VSEL_MASK,
287 .owner = THIS_MODULE,
288 },
289 {
290 .name = "LDO3",
291 .id = WM8400_LDO3,
292 .ops = &wm8400_ldo_ops,
185 .owner = THIS_MODULE,
186 },
187 {
188 .name = "LDO3",
189 .id = WM8400_LDO3,
190 .ops = &wm8400_ldo_ops,
191 .enable_reg = WM8400_LDO3_CONTROL,
192 .enable_mask = WM8400_LDO3_ENA,
293 .n_voltages = WM8400_LDO3_VSEL_MASK + 1,
193 .n_voltages = WM8400_LDO3_VSEL_MASK + 1,
194 .vsel_reg = WM8400_LDO3_CONTROL,
195 .vsel_mask = WM8400_LDO3_VSEL_MASK,
294 .type = REGULATOR_VOLTAGE,
295 .owner = THIS_MODULE,
296 },
297 {
298 .name = "LDO4",
299 .id = WM8400_LDO4,
300 .ops = &wm8400_ldo_ops,
196 .type = REGULATOR_VOLTAGE,
197 .owner = THIS_MODULE,
198 },
199 {
200 .name = "LDO4",
201 .id = WM8400_LDO4,
202 .ops = &wm8400_ldo_ops,
203 .enable_reg = WM8400_LDO4_CONTROL,
204 .enable_mask = WM8400_LDO4_ENA,
301 .n_voltages = WM8400_LDO4_VSEL_MASK + 1,
205 .n_voltages = WM8400_LDO4_VSEL_MASK + 1,
206 .vsel_reg = WM8400_LDO4_CONTROL,
207 .vsel_mask = WM8400_LDO4_VSEL_MASK,
302 .type = REGULATOR_VOLTAGE,
303 .owner = THIS_MODULE,
304 },
305 {
306 .name = "DCDC1",
307 .id = WM8400_DCDC1,
308 .ops = &wm8400_dcdc_ops,
208 .type = REGULATOR_VOLTAGE,
209 .owner = THIS_MODULE,
210 },
211 {
212 .name = "DCDC1",
213 .id = WM8400_DCDC1,
214 .ops = &wm8400_dcdc_ops,
215 .enable_reg = WM8400_DCDC1_CONTROL_1,
216 .enable_mask = WM8400_DC1_ENA_MASK,
309 .n_voltages = WM8400_DC1_VSEL_MASK + 1,
217 .n_voltages = WM8400_DC1_VSEL_MASK + 1,
218 .vsel_reg = WM8400_DCDC1_CONTROL_1,
219 .vsel_mask = WM8400_DC1_VSEL_MASK,
220 .min_uV = 850000,
221 .uV_step = 25000,
310 .type = REGULATOR_VOLTAGE,
311 .owner = THIS_MODULE,
312 },
313 {
314 .name = "DCDC2",
315 .id = WM8400_DCDC2,
316 .ops = &wm8400_dcdc_ops,
222 .type = REGULATOR_VOLTAGE,
223 .owner = THIS_MODULE,
224 },
225 {
226 .name = "DCDC2",
227 .id = WM8400_DCDC2,
228 .ops = &wm8400_dcdc_ops,
229 .enable_reg = WM8400_DCDC2_CONTROL_1,
230 .enable_mask = WM8400_DC1_ENA_MASK,
317 .n_voltages = WM8400_DC2_VSEL_MASK + 1,
231 .n_voltages = WM8400_DC2_VSEL_MASK + 1,
232 .vsel_reg = WM8400_DCDC2_CONTROL_1,
233 .vsel_mask = WM8400_DC2_VSEL_MASK,
234 .min_uV = 850000,
235 .uV_step = 25000,
318 .type = REGULATOR_VOLTAGE,
319 .owner = THIS_MODULE,
320 },
321};
322
323static int __devinit wm8400_regulator_probe(struct platform_device *pdev)
324{
325 struct wm8400 *wm8400 = container_of(pdev, struct wm8400, regulators[pdev->id]);
326 struct regulator_config config = { };
327 struct regulator_dev *rdev;
328
329 config.dev = &pdev->dev;
330 config.init_data = pdev->dev.platform_data;
331 config.driver_data = wm8400;
236 .type = REGULATOR_VOLTAGE,
237 .owner = THIS_MODULE,
238 },
239};
240
241static int __devinit wm8400_regulator_probe(struct platform_device *pdev)
242{
243 struct wm8400 *wm8400 = container_of(pdev, struct wm8400, regulators[pdev->id]);
244 struct regulator_config config = { };
245 struct regulator_dev *rdev;
246
247 config.dev = &pdev->dev;
248 config.init_data = pdev->dev.platform_data;
249 config.driver_data = wm8400;
250 config.regmap = wm8400->regmap;
332
333 rdev = regulator_register(&regulators[pdev->id], &config);
334 if (IS_ERR(rdev))
335 return PTR_ERR(rdev);
336
337 platform_set_drvdata(pdev, rdev);
338
339 return 0;

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252 rdev = regulator_register(&regulators[pdev->id], &config);
253 if (IS_ERR(rdev))
254 return PTR_ERR(rdev);
255
256 platform_set_drvdata(pdev, rdev);
257
258 return 0;

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