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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> | |
47c16975 | 24 | #include <linux/mfd/abx500.h> |
c789ca20 SI |
25 | #include <linux/regulator/driver.h> |
26 | #include <linux/regulator/machine.h> | |
27 | #include <linux/regulator/ab8500.h> | |
28 | ||
29 | /** | |
30 | * struct ab8500_regulator_info - ab8500 regulator information | |
31 | * @desc: regulator description | |
32 | * @ab8500: ab8500 parent | |
33 | * @regulator_dev: regulator device | |
34 | * @max_uV: maximum voltage (for variable voltage supplies) | |
35 | * @min_uV: minimum voltage (for variable voltage supplies) | |
36 | * @fixed_uV: typical voltage (for fixed voltage supplies) | |
47c16975 | 37 | * @update_bank: bank to control on/off |
c789ca20 SI |
38 | * @update_reg: register to control on/off |
39 | * @mask: mask to enable/disable regulator | |
40 | * @enable: bits to enable the regulator in normal(high power) mode | |
47c16975 | 41 | * @voltage_bank: bank to control regulator voltage |
c789ca20 SI |
42 | * @voltage_reg: register to control regulator voltage |
43 | * @voltage_mask: mask to control regulator voltage | |
44 | * @supported_voltages: supported voltage table | |
45 | * @voltages_len: number of supported voltages for the regulator | |
46 | */ | |
47 | struct ab8500_regulator_info { | |
48 | struct device *dev; | |
49 | struct regulator_desc desc; | |
50 | struct ab8500 *ab8500; | |
51 | struct regulator_dev *regulator; | |
52 | int max_uV; | |
53 | int min_uV; | |
54 | int fixed_uV; | |
47c16975 MW |
55 | u8 update_bank; |
56 | u8 update_reg; | |
57 | u8 mask; | |
58 | u8 enable; | |
59 | u8 voltage_bank; | |
60 | u8 voltage_reg; | |
61 | u8 voltage_mask; | |
c789ca20 SI |
62 | int const *supported_voltages; |
63 | int voltages_len; | |
64 | }; | |
65 | ||
66 | /* voltage tables for the vauxn/vintcore supplies */ | |
67 | static const int ldo_vauxn_voltages[] = { | |
68 | 1100000, | |
69 | 1200000, | |
70 | 1300000, | |
71 | 1400000, | |
72 | 1500000, | |
73 | 1800000, | |
74 | 1850000, | |
75 | 1900000, | |
76 | 2500000, | |
77 | 2650000, | |
78 | 2700000, | |
79 | 2750000, | |
80 | 2800000, | |
81 | 2900000, | |
82 | 3000000, | |
83 | 3300000, | |
84 | }; | |
85 | ||
86 | static const int ldo_vintcore_voltages[] = { | |
87 | 1200000, | |
88 | 1225000, | |
89 | 1250000, | |
90 | 1275000, | |
91 | 1300000, | |
92 | 1325000, | |
93 | 1350000, | |
94 | }; | |
95 | ||
96 | static int ab8500_regulator_enable(struct regulator_dev *rdev) | |
97 | { | |
98 | int regulator_id, ret; | |
99 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
100 | ||
101 | regulator_id = rdev_get_id(rdev); | |
102 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
103 | return -EINVAL; | |
104 | ||
47c16975 MW |
105 | ret = abx500_mask_and_set_register_interruptible(info->dev, |
106 | info->update_bank, info->update_reg, info->mask, info->enable); | |
c789ca20 SI |
107 | if (ret < 0) |
108 | dev_err(rdev_get_dev(rdev), | |
109 | "couldn't set enable bits for regulator\n"); | |
110 | return ret; | |
111 | } | |
112 | ||
113 | static int ab8500_regulator_disable(struct regulator_dev *rdev) | |
114 | { | |
115 | int regulator_id, ret; | |
116 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
117 | ||
118 | regulator_id = rdev_get_id(rdev); | |
119 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
120 | return -EINVAL; | |
121 | ||
47c16975 MW |
122 | ret = abx500_mask_and_set_register_interruptible(info->dev, |
123 | info->update_bank, info->update_reg, info->mask, 0x0); | |
c789ca20 SI |
124 | if (ret < 0) |
125 | dev_err(rdev_get_dev(rdev), | |
126 | "couldn't set disable bits for regulator\n"); | |
127 | return ret; | |
128 | } | |
129 | ||
130 | static int ab8500_regulator_is_enabled(struct regulator_dev *rdev) | |
131 | { | |
132 | int regulator_id, ret; | |
133 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
47c16975 | 134 | u8 value; |
c789ca20 SI |
135 | |
136 | regulator_id = rdev_get_id(rdev); | |
137 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
138 | return -EINVAL; | |
139 | ||
47c16975 MW |
140 | ret = abx500_get_register_interruptible(info->dev, |
141 | info->update_bank, info->update_reg, &value); | |
c789ca20 SI |
142 | if (ret < 0) { |
143 | dev_err(rdev_get_dev(rdev), | |
144 | "couldn't read 0x%x register\n", info->update_reg); | |
145 | return ret; | |
146 | } | |
147 | ||
47c16975 | 148 | if (value & info->mask) |
c789ca20 SI |
149 | return true; |
150 | else | |
151 | return false; | |
152 | } | |
153 | ||
154 | static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector) | |
155 | { | |
156 | int regulator_id; | |
157 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
158 | ||
159 | regulator_id = rdev_get_id(rdev); | |
160 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
161 | return -EINVAL; | |
162 | ||
163 | /* return the uV for the fixed regulators */ | |
164 | if (info->fixed_uV) | |
165 | return info->fixed_uV; | |
166 | ||
49990e6e | 167 | if (selector >= info->voltages_len) |
c789ca20 SI |
168 | return -EINVAL; |
169 | ||
170 | return info->supported_voltages[selector]; | |
171 | } | |
172 | ||
173 | static int ab8500_regulator_get_voltage(struct regulator_dev *rdev) | |
174 | { | |
47c16975 | 175 | int regulator_id, ret; |
c789ca20 | 176 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); |
47c16975 | 177 | u8 value; |
c789ca20 SI |
178 | |
179 | regulator_id = rdev_get_id(rdev); | |
180 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
181 | return -EINVAL; | |
182 | ||
47c16975 MW |
183 | ret = abx500_get_register_interruptible(info->dev, info->voltage_bank, |
184 | info->voltage_reg, &value); | |
c789ca20 SI |
185 | if (ret < 0) { |
186 | dev_err(rdev_get_dev(rdev), | |
187 | "couldn't read voltage reg for regulator\n"); | |
188 | return ret; | |
189 | } | |
190 | ||
191 | /* vintcore has a different layout */ | |
47c16975 | 192 | value &= info->voltage_mask; |
c789ca20 | 193 | if (regulator_id == AB8500_LDO_INTCORE) |
47c16975 | 194 | ret = info->supported_voltages[value >> 0x3]; |
c789ca20 | 195 | else |
47c16975 | 196 | ret = info->supported_voltages[value]; |
c789ca20 SI |
197 | |
198 | return ret; | |
199 | } | |
200 | ||
201 | static int ab8500_get_best_voltage_index(struct regulator_dev *rdev, | |
202 | int min_uV, int max_uV) | |
203 | { | |
204 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
205 | int i; | |
206 | ||
207 | /* check the supported voltage */ | |
208 | for (i = 0; i < info->voltages_len; i++) { | |
209 | if ((info->supported_voltages[i] >= min_uV) && | |
210 | (info->supported_voltages[i] <= max_uV)) | |
211 | return i; | |
212 | } | |
213 | ||
214 | return -EINVAL; | |
215 | } | |
216 | ||
217 | static int ab8500_regulator_set_voltage(struct regulator_dev *rdev, | |
3a93f2a9 MB |
218 | int min_uV, int max_uV, |
219 | unsigned *selector) | |
c789ca20 SI |
220 | { |
221 | int regulator_id, ret; | |
222 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
223 | ||
224 | regulator_id = rdev_get_id(rdev); | |
225 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
226 | return -EINVAL; | |
227 | ||
228 | /* get the appropriate voltages within the range */ | |
229 | ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV); | |
230 | if (ret < 0) { | |
231 | dev_err(rdev_get_dev(rdev), | |
232 | "couldn't get best voltage for regulator\n"); | |
233 | return ret; | |
234 | } | |
235 | ||
3a93f2a9 MB |
236 | *selector = ret; |
237 | ||
c789ca20 | 238 | /* set the registers for the request */ |
47c16975 MW |
239 | ret = abx500_mask_and_set_register_interruptible(info->dev, |
240 | info->voltage_bank, info->voltage_reg, | |
241 | info->voltage_mask, (u8)ret); | |
c789ca20 SI |
242 | if (ret < 0) |
243 | dev_err(rdev_get_dev(rdev), | |
244 | "couldn't set voltage reg for regulator\n"); | |
245 | ||
246 | return ret; | |
247 | } | |
248 | ||
249 | static struct regulator_ops ab8500_regulator_ops = { | |
250 | .enable = ab8500_regulator_enable, | |
251 | .disable = ab8500_regulator_disable, | |
252 | .is_enabled = ab8500_regulator_is_enabled, | |
253 | .get_voltage = ab8500_regulator_get_voltage, | |
254 | .set_voltage = ab8500_regulator_set_voltage, | |
255 | .list_voltage = ab8500_list_voltage, | |
256 | }; | |
257 | ||
258 | static int ab8500_fixed_get_voltage(struct regulator_dev *rdev) | |
259 | { | |
260 | int regulator_id; | |
261 | struct ab8500_regulator_info *info = rdev_get_drvdata(rdev); | |
262 | ||
263 | regulator_id = rdev_get_id(rdev); | |
264 | if (regulator_id >= AB8500_NUM_REGULATORS) | |
265 | return -EINVAL; | |
266 | ||
267 | return info->fixed_uV; | |
268 | } | |
269 | ||
270 | static struct regulator_ops ab8500_ldo_fixed_ops = { | |
271 | .enable = ab8500_regulator_enable, | |
272 | .disable = ab8500_regulator_disable, | |
273 | .is_enabled = ab8500_regulator_is_enabled, | |
274 | .get_voltage = ab8500_fixed_get_voltage, | |
275 | .list_voltage = ab8500_list_voltage, | |
276 | }; | |
277 | ||
47c16975 MW |
278 | #define AB8500_LDO(_id, min, max, bank, reg, reg_mask, \ |
279 | reg_enable, volt_bank, volt_reg, volt_mask, \ | |
280 | voltages, len_volts) \ | |
c789ca20 SI |
281 | { \ |
282 | .desc = { \ | |
283 | .name = "LDO-" #_id, \ | |
284 | .ops = &ab8500_regulator_ops, \ | |
285 | .type = REGULATOR_VOLTAGE, \ | |
286 | .id = AB8500_LDO_##_id, \ | |
287 | .owner = THIS_MODULE, \ | |
288 | }, \ | |
289 | .min_uV = (min) * 1000, \ | |
290 | .max_uV = (max) * 1000, \ | |
47c16975 | 291 | .update_bank = bank, \ |
c789ca20 SI |
292 | .update_reg = reg, \ |
293 | .mask = reg_mask, \ | |
294 | .enable = reg_enable, \ | |
47c16975 | 295 | .voltage_bank = volt_bank, \ |
c789ca20 SI |
296 | .voltage_reg = volt_reg, \ |
297 | .voltage_mask = volt_mask, \ | |
298 | .supported_voltages = voltages, \ | |
299 | .voltages_len = len_volts, \ | |
300 | .fixed_uV = 0, \ | |
301 | } | |
302 | ||
47c16975 MW |
303 | #define AB8500_FIXED_LDO(_id, fixed, bank, reg, \ |
304 | reg_mask, reg_enable) \ | |
c789ca20 SI |
305 | { \ |
306 | .desc = { \ | |
307 | .name = "LDO-" #_id, \ | |
308 | .ops = &ab8500_ldo_fixed_ops, \ | |
309 | .type = REGULATOR_VOLTAGE, \ | |
310 | .id = AB8500_LDO_##_id, \ | |
311 | .owner = THIS_MODULE, \ | |
312 | }, \ | |
313 | .fixed_uV = fixed * 1000, \ | |
47c16975 | 314 | .update_bank = bank, \ |
c789ca20 SI |
315 | .update_reg = reg, \ |
316 | .mask = reg_mask, \ | |
317 | .enable = reg_enable, \ | |
318 | } | |
319 | ||
320 | static struct ab8500_regulator_info ab8500_regulator_info[] = { | |
321 | /* | |
322 | * Variable Voltage LDOs | |
47c16975 MW |
323 | * name, min uV, max uV, ctrl bank, ctrl reg, reg mask, enable mask, |
324 | * volt ctrl bank, volt ctrl reg, volt ctrl mask, volt table, | |
325 | * num supported volts | |
c789ca20 | 326 | */ |
47c16975 | 327 | AB8500_LDO(AUX1, 1100, 3300, 0x04, 0x09, 0x3, 0x1, 0x04, 0x1f, 0xf, |
c789ca20 | 328 | ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)), |
47c16975 | 329 | AB8500_LDO(AUX2, 1100, 3300, 0x04, 0x09, 0xc, 0x4, 0x04, 0x20, 0xf, |
c789ca20 | 330 | ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)), |
47c16975 | 331 | AB8500_LDO(AUX3, 1100, 3300, 0x04, 0x0a, 0x3, 0x1, 0x04, 0x21, 0xf, |
c789ca20 | 332 | ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)), |
47c16975 | 333 | AB8500_LDO(INTCORE, 1100, 3300, 0x03, 0x80, 0x4, 0x4, 0x03, 0x80, 0x38, |
c789ca20 SI |
334 | ldo_vintcore_voltages, ARRAY_SIZE(ldo_vintcore_voltages)), |
335 | ||
336 | /* | |
337 | * Fixed Voltage LDOs | |
47c16975 | 338 | * name, o/p uV, ctrl bank, ctrl reg, enable, disable |
c789ca20 | 339 | */ |
47c16975 MW |
340 | AB8500_FIXED_LDO(TVOUT, 2000, 0x03, 0x80, 0x2, 0x2), |
341 | AB8500_FIXED_LDO(AUDIO, 2000, 0x03, 0x83, 0x2, 0x2), | |
342 | AB8500_FIXED_LDO(ANAMIC1, 2050, 0x03, 0x83, 0x4, 0x4), | |
343 | AB8500_FIXED_LDO(ANAMIC2, 2050, 0x03, 0x83, 0x8, 0x8), | |
344 | AB8500_FIXED_LDO(DMIC, 1800, 0x03, 0x83, 0x10, 0x10), | |
345 | AB8500_FIXED_LDO(ANA, 1200, 0x03, 0x83, 0xc, 0x4), | |
c789ca20 SI |
346 | }; |
347 | ||
348 | static inline struct ab8500_regulator_info *find_regulator_info(int id) | |
349 | { | |
350 | struct ab8500_regulator_info *info; | |
351 | int i; | |
352 | ||
353 | for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) { | |
354 | info = &ab8500_regulator_info[i]; | |
355 | if (info->desc.id == id) | |
356 | return info; | |
357 | } | |
358 | return NULL; | |
359 | } | |
360 | ||
361 | static __devinit int ab8500_regulator_probe(struct platform_device *pdev) | |
362 | { | |
363 | struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent); | |
af54decd | 364 | struct ab8500_platform_data *pdata; |
c789ca20 SI |
365 | int i, err; |
366 | ||
367 | if (!ab8500) { | |
368 | dev_err(&pdev->dev, "null mfd parent\n"); | |
369 | return -EINVAL; | |
370 | } | |
af54decd | 371 | pdata = dev_get_platdata(ab8500->dev); |
c789ca20 SI |
372 | |
373 | /* register all regulators */ | |
374 | for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) { | |
375 | struct ab8500_regulator_info *info = NULL; | |
376 | ||
377 | /* assign per-regulator data */ | |
378 | info = &ab8500_regulator_info[i]; | |
379 | info->dev = &pdev->dev; | |
380 | info->ab8500 = ab8500; | |
381 | ||
382 | info->regulator = regulator_register(&info->desc, &pdev->dev, | |
383 | pdata->regulator[i], info); | |
384 | if (IS_ERR(info->regulator)) { | |
385 | err = PTR_ERR(info->regulator); | |
386 | dev_err(&pdev->dev, "failed to register regulator %s\n", | |
387 | info->desc.name); | |
388 | /* when we fail, un-register all earlier regulators */ | |
d4876a3b | 389 | while (--i >= 0) { |
c789ca20 SI |
390 | info = &ab8500_regulator_info[i]; |
391 | regulator_unregister(info->regulator); | |
c789ca20 SI |
392 | } |
393 | return err; | |
394 | } | |
395 | } | |
396 | ||
397 | return 0; | |
398 | } | |
399 | ||
400 | static __devexit int ab8500_regulator_remove(struct platform_device *pdev) | |
401 | { | |
402 | int i; | |
403 | ||
404 | for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) { | |
405 | struct ab8500_regulator_info *info = NULL; | |
406 | info = &ab8500_regulator_info[i]; | |
407 | regulator_unregister(info->regulator); | |
408 | } | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
413 | static struct platform_driver ab8500_regulator_driver = { | |
414 | .probe = ab8500_regulator_probe, | |
415 | .remove = __devexit_p(ab8500_regulator_remove), | |
416 | .driver = { | |
417 | .name = "ab8500-regulator", | |
418 | .owner = THIS_MODULE, | |
419 | }, | |
420 | }; | |
421 | ||
422 | static int __init ab8500_regulator_init(void) | |
423 | { | |
424 | int ret; | |
425 | ||
426 | ret = platform_driver_register(&ab8500_regulator_driver); | |
427 | if (ret != 0) | |
428 | pr_err("Failed to register ab8500 regulator: %d\n", ret); | |
429 | ||
430 | return ret; | |
431 | } | |
432 | subsys_initcall(ab8500_regulator_init); | |
433 | ||
434 | static void __exit ab8500_regulator_exit(void) | |
435 | { | |
436 | platform_driver_unregister(&ab8500_regulator_driver); | |
437 | } | |
438 | module_exit(ab8500_regulator_exit); | |
439 | ||
440 | MODULE_LICENSE("GPL v2"); | |
441 | MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>"); | |
442 | MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC"); | |
443 | MODULE_ALIAS("platform:ab8500-regulator"); |