Commit | Line | Data |
---|---|---|
c789ca20 SI |
1 | /* |
2 | * Copyright (C) ST-Ericsson SA 2010 | |
3 | * | |
4 | * License Terms: GNU General Public License v2 | |
5 | * | |
6 | * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson | |
7 | * | |
8 | * AB8500 peripheral regulators | |
9 | * | |
10 | * AB8500 supports the following regulators, | |
11 | * LDOs - VAUDIO, VANAMIC2/2, VDIGMIC, VINTCORE12, VTVOUT, | |
12 | * VAUX1/2/3, VANA | |
13 | * | |
14 | * for DB8500 cut 1.0 and previous versions of the silicon, all accesses | |
15 | * to registers are through the DB8500 SPI. In cut 1.1 onwards, these | |
16 | * accesses are through the DB8500 PRCMU I2C | |
17 | * | |
18 | */ | |
19 | #include <linux/init.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/err.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/mfd/ab8500.h> | |
24 | #include <linux/regulator/driver.h> | |
25 | #include <linux/regulator/machine.h> | |
26 | #include <linux/regulator/ab8500.h> | |
27 | ||
28 | /** | |
29 | * struct ab8500_regulator_info - ab8500 regulator information | |
30 | * @desc: regulator description | |
31 | * @ab8500: ab8500 parent | |
32 | * @regulator_dev: regulator device | |
33 | * @max_uV: maximum voltage (for variable voltage supplies) | |
34 | * @min_uV: minimum voltage (for variable voltage supplies) | |
35 | * @fixed_uV: typical voltage (for fixed voltage supplies) | |
36 | * @update_reg: register to control on/off | |
37 | * @mask: mask to enable/disable regulator | |
38 | * @enable: bits to enable the regulator in normal(high power) mode | |
39 | * @voltage_reg: register to control regulator voltage | |
40 | * @voltage_mask: mask to control regulator voltage | |
41 | * @supported_voltages: supported voltage table | |
42 | * @voltages_len: number of supported voltages for the regulator | |
43 | */ | |
44 | struct ab8500_regulator_info { | |
45 | struct device *dev; | |
46 | struct regulator_desc desc; | |
47 | struct ab8500 *ab8500; | |
48 | struct regulator_dev *regulator; | |
49 | int max_uV; | |
50 | int min_uV; | |
51 | int fixed_uV; | |
52 | int update_reg; | |
53 | int mask; | |
54 | int enable; | |
55 | int voltage_reg; | |
56 | int voltage_mask; | |
57 | int const *supported_voltages; | |
58 | int voltages_len; | |
59 | }; | |
60 | ||
61 | /* voltage tables for the vauxn/vintcore supplies */ | |
62 | static const int ldo_vauxn_voltages[] = { | |
63 | 1100000, | |
64 | 1200000, | |
65 | 1300000, | |
66 | 1400000, | |
67 | 1500000, | |
68 | 1800000, | |
69 | 1850000, | |
70 | 1900000, | |
71 | 2500000, | |
72 | 2650000, | |
73 | 2700000, | |
74 | 2750000, | |
75 | 2800000, | |
76 | 2900000, | |
77 | 3000000, | |
78 | 3300000, | |
79 | }; | |
80 | ||
81 | static const int ldo_vintcore_voltages[] = { | |
82 | 1200000, | |
83 | 1225000, | |
84 | 1250000, | |
85 | 1275000, | |
86 | 1300000, | |
87 | 1325000, | |
88 | 1350000, | |
89 | }; | |
90 | ||
91 | static int ab8500_regulator_enable(struct regulator_dev *rdev) | |
92 | { | |
93 | int regulator_id, ret; | |
94 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
95 | ||
96 | regulator_id = rdev_get_id(rdev); | |
97 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
98 | return -EINVAL; | |
99 | ||
100 | ret = ab8500_set_bits(info->ab8500, info->update_reg, | |
101 | info->mask, info->enable); | |
102 | if (ret < 0) | |
103 | dev_err(rdev_get_dev(rdev), | |
104 | "couldn't set enable bits for regulator\n"); | |
105 | return ret; | |
106 | } | |
107 | ||
108 | static int ab8500_regulator_disable(struct regulator_dev *rdev) | |
109 | { | |
110 | int regulator_id, ret; | |
111 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
112 | ||
113 | regulator_id = rdev_get_id(rdev); | |
114 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
115 | return -EINVAL; | |
116 | ||
117 | ret = ab8500_set_bits(info->ab8500, info->update_reg, | |
118 | info->mask, 0x0); | |
119 | if (ret < 0) | |
120 | dev_err(rdev_get_dev(rdev), | |
121 | "couldn't set disable bits for regulator\n"); | |
122 | return ret; | |
123 | } | |
124 | ||
125 | static int ab8500_regulator_is_enabled(struct regulator_dev *rdev) | |
126 | { | |
127 | int regulator_id, ret; | |
128 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
129 | ||
130 | regulator_id = rdev_get_id(rdev); | |
131 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
132 | return -EINVAL; | |
133 | ||
134 | ret = ab8500_read(info->ab8500, info->update_reg); | |
135 | if (ret < 0) { | |
136 | dev_err(rdev_get_dev(rdev), | |
137 | "couldn't read 0x%x register\n", info->update_reg); | |
138 | return ret; | |
139 | } | |
140 | ||
141 | if (ret & info->mask) | |
142 | return true; | |
143 | else | |
144 | return false; | |
145 | } | |
146 | ||
147 | static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector) | |
148 | { | |
149 | int regulator_id; | |
150 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
151 | ||
152 | regulator_id = rdev_get_id(rdev); | |
153 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
154 | return -EINVAL; | |
155 | ||
156 | /* return the uV for the fixed regulators */ | |
157 | if (info->fixed_uV) | |
158 | return info->fixed_uV; | |
159 | ||
49990e6e | 160 | if (selector >= info->voltages_len) |
c789ca20 SI |
161 | return -EINVAL; |
162 | ||
163 | return info->supported_voltages[selector]; | |
164 | } | |
165 | ||
166 | static int ab8500_regulator_get_voltage(struct regulator_dev *rdev) | |
167 | { | |
168 | int regulator_id, ret, val; | |
169 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
170 | ||
171 | regulator_id = rdev_get_id(rdev); | |
172 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
173 | return -EINVAL; | |
174 | ||
175 | ret = ab8500_read(info->ab8500, info->voltage_reg); | |
176 | if (ret < 0) { | |
177 | dev_err(rdev_get_dev(rdev), | |
178 | "couldn't read voltage reg for regulator\n"); | |
179 | return ret; | |
180 | } | |
181 | ||
182 | /* vintcore has a different layout */ | |
183 | val = ret & info->voltage_mask; | |
184 | if (regulator_id == AB8500_LDO_INTCORE) | |
185 | ret = info->supported_voltages[val >> 0x3]; | |
186 | else | |
187 | ret = info->supported_voltages[val]; | |
188 | ||
189 | return ret; | |
190 | } | |
191 | ||
192 | static int ab8500_get_best_voltage_index(struct regulator_dev *rdev, | |
193 | int min_uV, int max_uV) | |
194 | { | |
195 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
196 | int i; | |
197 | ||
198 | /* check the supported voltage */ | |
199 | for (i = 0; i < info->voltages_len; i++) { | |
200 | if ((info->supported_voltages[i] >= min_uV) && | |
201 | (info->supported_voltages[i] <= max_uV)) | |
202 | return i; | |
203 | } | |
204 | ||
205 | return -EINVAL; | |
206 | } | |
207 | ||
208 | static int ab8500_regulator_set_voltage(struct regulator_dev *rdev, | |
209 | int min_uV, int max_uV) | |
210 | { | |
211 | int regulator_id, ret; | |
212 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
213 | ||
214 | regulator_id = rdev_get_id(rdev); | |
215 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
216 | return -EINVAL; | |
217 | ||
218 | /* get the appropriate voltages within the range */ | |
219 | ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV); | |
220 | if (ret < 0) { | |
221 | dev_err(rdev_get_dev(rdev), | |
222 | "couldn't get best voltage for regulator\n"); | |
223 | return ret; | |
224 | } | |
225 | ||
226 | /* set the registers for the request */ | |
227 | ret = ab8500_set_bits(info->ab8500, info->voltage_reg, | |
228 | info->voltage_mask, ret); | |
229 | if (ret < 0) | |
230 | dev_err(rdev_get_dev(rdev), | |
231 | "couldn't set voltage reg for regulator\n"); | |
232 | ||
233 | return ret; | |
234 | } | |
235 | ||
236 | static struct regulator_ops ab8500_regulator_ops = { | |
237 | .enable = ab8500_regulator_enable, | |
238 | .disable = ab8500_regulator_disable, | |
239 | .is_enabled = ab8500_regulator_is_enabled, | |
240 | .get_voltage = ab8500_regulator_get_voltage, | |
241 | .set_voltage = ab8500_regulator_set_voltage, | |
242 | .list_voltage = ab8500_list_voltage, | |
243 | }; | |
244 | ||
245 | static int ab8500_fixed_get_voltage(struct regulator_dev *rdev) | |
246 | { | |
247 | int regulator_id; | |
248 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
249 | ||
250 | regulator_id = rdev_get_id(rdev); | |
251 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
252 | return -EINVAL; | |
253 | ||
254 | return info->fixed_uV; | |
255 | } | |
256 | ||
257 | static struct regulator_ops ab8500_ldo_fixed_ops = { | |
258 | .enable = ab8500_regulator_enable, | |
259 | .disable = ab8500_regulator_disable, | |
260 | .is_enabled = ab8500_regulator_is_enabled, | |
261 | .get_voltage = ab8500_fixed_get_voltage, | |
262 | .list_voltage = ab8500_list_voltage, | |
263 | }; | |
264 | ||
265 | #define AB8500_LDO(_id, min, max, reg, reg_mask, reg_enable, \ | |
266 | volt_reg, volt_mask, voltages, \ | |
267 | len_volts) \ | |
268 | { \ | |
269 | .desc = { \ | |
270 | .name = "LDO-" #_id, \ | |
271 | .ops = &ab8500_regulator_ops, \ | |
272 | .type = REGULATOR_VOLTAGE, \ | |
273 | .id = AB8500_LDO_##_id, \ | |
274 | .owner = THIS_MODULE, \ | |
275 | }, \ | |
276 | .min_uV = (min) * 1000, \ | |
277 | .max_uV = (max) * 1000, \ | |
278 | .update_reg = reg, \ | |
279 | .mask = reg_mask, \ | |
280 | .enable = reg_enable, \ | |
281 | .voltage_reg = volt_reg, \ | |
282 | .voltage_mask = volt_mask, \ | |
283 | .supported_voltages = voltages, \ | |
284 | .voltages_len = len_volts, \ | |
285 | .fixed_uV = 0, \ | |
286 | } | |
287 | ||
288 | #define AB8500_FIXED_LDO(_id, fixed, reg, reg_mask, \ | |
289 | reg_enable) \ | |
290 | { \ | |
291 | .desc = { \ | |
292 | .name = "LDO-" #_id, \ | |
293 | .ops = &ab8500_ldo_fixed_ops, \ | |
294 | .type = REGULATOR_VOLTAGE, \ | |
295 | .id = AB8500_LDO_##_id, \ | |
296 | .owner = THIS_MODULE, \ | |
297 | }, \ | |
298 | .fixed_uV = fixed * 1000, \ | |
299 | .update_reg = reg, \ | |
300 | .mask = reg_mask, \ | |
301 | .enable = reg_enable, \ | |
302 | } | |
303 | ||
304 | static struct ab8500_regulator_info ab8500_regulator_info[] = { | |
305 | /* | |
306 | * Variable Voltage LDOs | |
307 | * name, min uV, max uV, ctrl reg, reg mask, enable mask, | |
308 | * volt ctrl reg, volt ctrl mask, volt table, num supported volts | |
309 | */ | |
310 | AB8500_LDO(AUX1, 1100, 3300, 0x0409, 0x3, 0x1, 0x041f, 0xf, | |
311 | ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)), | |
312 | AB8500_LDO(AUX2, 1100, 3300, 0x0409, 0xc, 0x4, 0x0420, 0xf, | |
313 | ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)), | |
314 | AB8500_LDO(AUX3, 1100, 3300, 0x040a, 0x3, 0x1, 0x0421, 0xf, | |
315 | ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)), | |
316 | AB8500_LDO(INTCORE, 1100, 3300, 0x0380, 0x4, 0x4, 0x0380, 0x38, | |
317 | ldo_vintcore_voltages, ARRAY_SIZE(ldo_vintcore_voltages)), | |
318 | ||
319 | /* | |
320 | * Fixed Voltage LDOs | |
321 | * name, o/p uV, ctrl reg, enable, disable | |
322 | */ | |
323 | AB8500_FIXED_LDO(TVOUT, 2000, 0x0380, 0x2, 0x2), | |
324 | AB8500_FIXED_LDO(AUDIO, 2000, 0x0383, 0x2, 0x2), | |
325 | AB8500_FIXED_LDO(ANAMIC1, 2050, 0x0383, 0x4, 0x4), | |
326 | AB8500_FIXED_LDO(ANAMIC2, 2050, 0x0383, 0x8, 0x8), | |
327 | AB8500_FIXED_LDO(DMIC, 1800, 0x0383, 0x10, 0x10), | |
328 | AB8500_FIXED_LDO(ANA, 1200, 0x0383, 0xc, 0x4), | |
329 | }; | |
330 | ||
331 | static inline struct ab8500_regulator_info *find_regulator_info(int id) | |
332 | { | |
333 | struct ab8500_regulator_info *info; | |
334 | int i; | |
335 | ||
336 | for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) { | |
337 | info = &ab8500_regulator_info[i]; | |
338 | if (info->desc.id == id) | |
339 | return info; | |
340 | } | |
341 | return NULL; | |
342 | } | |
343 | ||
344 | static __devinit int ab8500_regulator_probe(struct platform_device *pdev) | |
345 | { | |
346 | struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent); | |
af54decd | 347 | struct ab8500_platform_data *pdata; |
c789ca20 SI |
348 | int i, err; |
349 | ||
350 | if (!ab8500) { | |
351 | dev_err(&pdev->dev, "null mfd parent\n"); | |
352 | return -EINVAL; | |
353 | } | |
af54decd | 354 | pdata = dev_get_platdata(ab8500->dev); |
c789ca20 SI |
355 | |
356 | /* register all regulators */ | |
357 | for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) { | |
358 | struct ab8500_regulator_info *info = NULL; | |
359 | ||
360 | /* assign per-regulator data */ | |
361 | info = &ab8500_regulator_info[i]; | |
362 | info->dev = &pdev->dev; | |
363 | info->ab8500 = ab8500; | |
364 | ||
365 | info->regulator = regulator_register(&info->desc, &pdev->dev, | |
366 | pdata->regulator[i], info); | |
367 | if (IS_ERR(info->regulator)) { | |
368 | err = PTR_ERR(info->regulator); | |
369 | dev_err(&pdev->dev, "failed to register regulator %s\n", | |
370 | info->desc.name); | |
371 | /* when we fail, un-register all earlier regulators */ | |
d4876a3b | 372 | while (--i >= 0) { |
c789ca20 SI |
373 | info = &ab8500_regulator_info[i]; |
374 | regulator_unregister(info->regulator); | |
c789ca20 SI |
375 | } |
376 | return err; | |
377 | } | |
378 | } | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
383 | static __devexit int ab8500_regulator_remove(struct platform_device *pdev) | |
384 | { | |
385 | int i; | |
386 | ||
387 | for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) { | |
388 | struct ab8500_regulator_info *info = NULL; | |
389 | info = &ab8500_regulator_info[i]; | |
390 | regulator_unregister(info->regulator); | |
391 | } | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | static struct platform_driver ab8500_regulator_driver = { | |
397 | .probe = ab8500_regulator_probe, | |
398 | .remove = __devexit_p(ab8500_regulator_remove), | |
399 | .driver = { | |
400 | .name = "ab8500-regulator", | |
401 | .owner = THIS_MODULE, | |
402 | }, | |
403 | }; | |
404 | ||
405 | static int __init ab8500_regulator_init(void) | |
406 | { | |
407 | int ret; | |
408 | ||
409 | ret = platform_driver_register(&ab8500_regulator_driver); | |
410 | if (ret != 0) | |
411 | pr_err("Failed to register ab8500 regulator: %d\n", ret); | |
412 | ||
413 | return ret; | |
414 | } | |
415 | subsys_initcall(ab8500_regulator_init); | |
416 | ||
417 | static void __exit ab8500_regulator_exit(void) | |
418 | { | |
419 | platform_driver_unregister(&ab8500_regulator_driver); | |
420 | } | |
421 | module_exit(ab8500_regulator_exit); | |
422 | ||
423 | MODULE_LICENSE("GPL v2"); | |
424 | MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>"); | |
425 | MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC"); | |
426 | MODULE_ALIAS("platform:ab8500-regulator"); |