?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
mach-ux500: add U8500 UIB platform data
[linux-2.6/btrfs-unstable.git] / drivers / regulator / ab8500.c
blobd9a052c53aec2d8d9ed958026748c886dc3c0aad
1 /*
2 * Copyright (C) ST-Ericsson SA 2010
3 *
4 * License Terms: GNU General Public License v2
5 *
6 * Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
7 * Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
8 *
9 * AB8500 peripheral regulators
10 *
11 * AB8500 supports the following regulators:
12 * VAUX1/2/3, VINTCORE, VTVOUT, VAUDIO, VAMIC1/2, VDMIC, VANA
13 */
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/err.h>
17 #include <linux/platform_device.h>
18 #include <linux/mfd/ab8500.h>
19 #include <linux/mfd/abx500.h>
20 #include <linux/regulator/driver.h>
21 #include <linux/regulator/machine.h>
22 #include <linux/regulator/ab8500.h>
23
24 /**
25 * struct ab8500_regulator_info - ab8500 regulator information
26 * @dev: device pointer
27 * @desc: regulator description
28 * @regulator_dev: regulator device
29 * @max_uV: maximum voltage (for variable voltage supplies)
30 * @min_uV: minimum voltage (for variable voltage supplies)
31 * @fixed_uV: typical voltage (for fixed voltage supplies)
32 * @update_bank: bank to control on/off
33 * @update_reg: register to control on/off
34 * @update_mask: mask to enable/disable regulator
35 * @update_val_enable: bits to enable the regulator in normal (high power) mode
36 * @voltage_bank: bank to control regulator voltage
37 * @voltage_reg: register to control regulator voltage
38 * @voltage_mask: mask to control regulator voltage
39 * @voltages: supported voltage table
40 * @voltages_len: number of supported voltages for the regulator
41 */
42 struct ab8500_regulator_info {
43 struct device *dev;
44 struct regulator_desc desc;
45 struct regulator_dev *regulator;
46 int max_uV;
47 int min_uV;
48 int fixed_uV;
49 u8 update_bank;
50 u8 update_reg;
51 u8 update_mask;
52 u8 update_val_enable;
53 u8 voltage_bank;
54 u8 voltage_reg;
55 u8 voltage_mask;
56 int const *voltages;
57 int voltages_len;
58 };
59
60 /* voltage tables for the vauxn/vintcore supplies */
61 static const int ldo_vauxn_voltages[] = {
62 1100000,
63 1200000,
64 1300000,
65 1400000,
66 1500000,
67 1800000,
68 1850000,
69 1900000,
70 2500000,
71 2650000,
72 2700000,
73 2750000,
74 2800000,
75 2900000,
76 3000000,
77 3300000,
78 };
79
80 static const int ldo_vaux3_voltages[] = {
81 1200000,
82 1500000,
83 1800000,
84 2100000,
85 2500000,
86 2750000,
87 2790000,
88 2910000,
89 };
90
91 static const int ldo_vintcore_voltages[] = {
92 1200000,
93 1225000,
94 1250000,
95 1275000,
96 1300000,
97 1325000,
98 1350000,
99 };
100
101 static int ab8500_regulator_enable(struct regulator_dev *rdev)
102 {
103 int ret;
104 struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
105
106 if (info == NULL) {
107 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
108 return -EINVAL;
109 }
110
111 ret = abx500_mask_and_set_register_interruptible(info->dev,
112 info->update_bank, info->update_reg,
113 info->update_mask, info->update_val_enable);
114 if (ret < 0)
115 dev_err(rdev_get_dev(rdev),
116 "couldn't set enable bits for regulator\n");
117
118 dev_vdbg(rdev_get_dev(rdev),
119 "%s-enable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
120 info->desc.name, info->update_bank, info->update_reg,
121 info->update_mask, info->update_val_enable);
122
123 return ret;
124 }
125
126 static int ab8500_regulator_disable(struct regulator_dev *rdev)
127 {
128 int ret;
129 struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
130
131 if (info == NULL) {
132 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
133 return -EINVAL;
134 }
135
136 ret = abx500_mask_and_set_register_interruptible(info->dev,
137 info->update_bank, info->update_reg,
138 info->update_mask, 0x0);
139 if (ret < 0)
140 dev_err(rdev_get_dev(rdev),
141 "couldn't set disable bits for regulator\n");
142
143 dev_vdbg(rdev_get_dev(rdev),
144 "%s-disable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
145 info->desc.name, info->update_bank, info->update_reg,
146 info->update_mask, 0x0);
147
148 return ret;
149 }
150
151 static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
152 {
153 int ret;
154 struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
155 u8 regval;
156
157 if (info == NULL) {
158 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
159 return -EINVAL;
160 }
161
162 ret = abx500_get_register_interruptible(info->dev,
163 info->update_bank, info->update_reg, &regval);
164 if (ret < 0) {
165 dev_err(rdev_get_dev(rdev),
166 "couldn't read 0x%x register\n", info->update_reg);
167 return ret;
168 }
169
170 dev_vdbg(rdev_get_dev(rdev),
171 "%s-is_enabled (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
172 " 0x%x\n",
173 info->desc.name, info->update_bank, info->update_reg,
174 info->update_mask, regval);
175
176 if (regval & info->update_mask)
177 return true;
178 else
179 return false;
180 }
181
182 static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector)
183 {
184 struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
185
186 if (info == NULL) {
187 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
188 return -EINVAL;
189 }
190
191 /* return the uV for the fixed regulators */
192 if (info->fixed_uV)
193 return info->fixed_uV;
194
195 if (selector >= info->voltages_len)
196 return -EINVAL;
197
198 return info->voltages[selector];
199 }
200
201 static int ab8500_regulator_get_voltage(struct regulator_dev *rdev)
202 {
203 int ret, val;
204 struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
205 u8 regval;
206
207 if (info == NULL) {
208 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
209 return -EINVAL;
210 }
211
212 ret = abx500_get_register_interruptible(info->dev,
213 info->voltage_bank, info->voltage_reg, &regval);
214 if (ret < 0) {
215 dev_err(rdev_get_dev(rdev),
216 "couldn't read voltage reg for regulator\n");
217 return ret;
218 }
219
220 dev_vdbg(rdev_get_dev(rdev),
221 "%s-get_voltage (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
222 " 0x%x\n",
223 info->desc.name, info->voltage_bank, info->voltage_reg,
224 info->voltage_mask, regval);
225
226 /* vintcore has a different layout */
227 val = regval & info->voltage_mask;
228 if (info->desc.id == AB8500_LDO_INTCORE)
229 ret = info->voltages[val >> 0x3];
230 else
231 ret = info->voltages[val];
232
233 return ret;
234 }
235
236 static int ab8500_get_best_voltage_index(struct regulator_dev *rdev,
237 int min_uV, int max_uV)
238 {
239 struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
240 int i;
241
242 /* check the supported voltage */
243 for (i = 0; i < info->voltages_len; i++) {
244 if ((info->voltages[i] >= min_uV) &&
245 (info->voltages[i] <= max_uV))
246 return i;
247 }
248
249 return -EINVAL;
250 }
251
252 static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
253 int min_uV, int max_uV,
254 unsigned *selector)
255 {
256 int ret;
257 struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
258 u8 regval;
259
260 if (info == NULL) {
261 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
262 return -EINVAL;
263 }
264
265 /* get the appropriate voltages within the range */
266 ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV);
267 if (ret < 0) {
268 dev_err(rdev_get_dev(rdev),
269 "couldn't get best voltage for regulator\n");
270 return ret;
271 }
272
273 *selector = ret;
274
275 /* set the registers for the request */
276 regval = (u8)ret;
277 ret = abx500_mask_and_set_register_interruptible(info->dev,
278 info->voltage_bank, info->voltage_reg,
279 info->voltage_mask, regval);
280 if (ret < 0)
281 dev_err(rdev_get_dev(rdev),
282 "couldn't set voltage reg for regulator\n");
283
284 dev_vdbg(rdev_get_dev(rdev),
285 "%s-set_voltage (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
286 " 0x%x\n",
287 info->desc.name, info->voltage_bank, info->voltage_reg,
288 info->voltage_mask, regval);
289
290 return ret;
291 }
292
293 static struct regulator_ops ab8500_regulator_ops = {
294 .enable = ab8500_regulator_enable,
295 .disable = ab8500_regulator_disable,
296 .is_enabled = ab8500_regulator_is_enabled,
297 .get_voltage = ab8500_regulator_get_voltage,
298 .set_voltage = ab8500_regulator_set_voltage,
299 .list_voltage = ab8500_list_voltage,
300 };
301
302 static int ab8500_fixed_get_voltage(struct regulator_dev *rdev)
303 {
304 struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
305
306 if (info == NULL) {
307 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
308 return -EINVAL;
309 }
310
311 return info->fixed_uV;
312 }
313
314 static struct regulator_ops ab8500_regulator_fixed_ops = {
315 .enable = ab8500_regulator_enable,
316 .disable = ab8500_regulator_disable,
317 .is_enabled = ab8500_regulator_is_enabled,
318 .get_voltage = ab8500_fixed_get_voltage,
319 .list_voltage = ab8500_list_voltage,
320 };
321
322 static struct ab8500_regulator_info
323 ab8500_regulator_info[AB8500_NUM_REGULATORS] = {
324 /*
325 * Variable Voltage Regulators
326 * name, min mV, max mV,
327 * update bank, reg, mask, enable val
328 * volt bank, reg, mask, table, table length
329 */
330 [AB8500_LDO_AUX1] = {
331 .desc = {
332 .name = "LDO-AUX1",
333 .ops = &ab8500_regulator_ops,
334 .type = REGULATOR_VOLTAGE,
335 .id = AB8500_LDO_AUX1,
336 .owner = THIS_MODULE,
337 .n_voltages = ARRAY_SIZE(ldo_vauxn_voltages),
338 },
339 .min_uV = 1100000,
340 .max_uV = 3300000,
341 .update_bank = 0x04,
342 .update_reg = 0x09,
343 .update_mask = 0x03,
344 .update_val_enable = 0x01,
345 .voltage_bank = 0x04,
346 .voltage_reg = 0x1f,
347 .voltage_mask = 0x0f,
348 .voltages = ldo_vauxn_voltages,
349 .voltages_len = ARRAY_SIZE(ldo_vauxn_voltages),
350 },
351 [AB8500_LDO_AUX2] = {
352 .desc = {
353 .name = "LDO-AUX2",
354 .ops = &ab8500_regulator_ops,
355 .type = REGULATOR_VOLTAGE,
356 .id = AB8500_LDO_AUX2,
357 .owner = THIS_MODULE,
358 .n_voltages = ARRAY_SIZE(ldo_vauxn_voltages),
359 },
360 .min_uV = 1100000,
361 .max_uV = 3300000,
362 .update_bank = 0x04,
363 .update_reg = 0x09,
364 .update_mask = 0x0c,
365 .update_val_enable = 0x04,
366 .voltage_bank = 0x04,
367 .voltage_reg = 0x20,
368 .voltage_mask = 0x0f,
369 .voltages = ldo_vauxn_voltages,
370 .voltages_len = ARRAY_SIZE(ldo_vauxn_voltages),
371 },
372 [AB8500_LDO_AUX3] = {
373 .desc = {
374 .name = "LDO-AUX3",
375 .ops = &ab8500_regulator_ops,
376 .type = REGULATOR_VOLTAGE,
377 .id = AB8500_LDO_AUX3,
378 .owner = THIS_MODULE,
379 .n_voltages = ARRAY_SIZE(ldo_vaux3_voltages),
380 },
381 .min_uV = 1100000,
382 .max_uV = 3300000,
383 .update_bank = 0x04,
384 .update_reg = 0x0a,
385 .update_mask = 0x03,
386 .update_val_enable = 0x01,
387 .voltage_bank = 0x04,
388 .voltage_reg = 0x21,
389 .voltage_mask = 0x07,
390 .voltages = ldo_vaux3_voltages,
391 .voltages_len = ARRAY_SIZE(ldo_vaux3_voltages),
392 },
393 [AB8500_LDO_INTCORE] = {
394 .desc = {
395 .name = "LDO-INTCORE",
396 .ops = &ab8500_regulator_ops,
397 .type = REGULATOR_VOLTAGE,
398 .id = AB8500_LDO_INTCORE,
399 .owner = THIS_MODULE,
400 .n_voltages = ARRAY_SIZE(ldo_vintcore_voltages),
401 },
402 .min_uV = 1100000,
403 .max_uV = 3300000,
404 .update_bank = 0x03,
405 .update_reg = 0x80,
406 .update_mask = 0x44,
407 .update_val_enable = 0x04,
408 .voltage_bank = 0x03,
409 .voltage_reg = 0x80,
410 .voltage_mask = 0x38,
411 .voltages = ldo_vintcore_voltages,
412 .voltages_len = ARRAY_SIZE(ldo_vintcore_voltages),
413 },
414
415 /*
416 * Fixed Voltage Regulators
417 * name, fixed mV,
418 * update bank, reg, mask, enable val
419 */
420 [AB8500_LDO_TVOUT] = {
421 .desc = {
422 .name = "LDO-TVOUT",
423 .ops = &ab8500_regulator_fixed_ops,
424 .type = REGULATOR_VOLTAGE,
425 .id = AB8500_LDO_TVOUT,
426 .owner = THIS_MODULE,
427 .n_voltages = 1,
428 },
429 .fixed_uV = 2000000,
430 .update_bank = 0x03,
431 .update_reg = 0x80,
432 .update_mask = 0x82,
433 .update_val_enable = 0x02,
434 },
435 [AB8500_LDO_AUDIO] = {
436 .desc = {
437 .name = "LDO-AUDIO",
438 .ops = &ab8500_regulator_fixed_ops,
439 .type = REGULATOR_VOLTAGE,
440 .id = AB8500_LDO_AUDIO,
441 .owner = THIS_MODULE,
442 .n_voltages = 1,
443 },
444 .fixed_uV = 2000000,
445 .update_bank = 0x03,
446 .update_reg = 0x83,
447 .update_mask = 0x02,
448 .update_val_enable = 0x02,
449 },
450 [AB8500_LDO_ANAMIC1] = {
451 .desc = {
452 .name = "LDO-ANAMIC1",
453 .ops = &ab8500_regulator_fixed_ops,
454 .type = REGULATOR_VOLTAGE,
455 .id = AB8500_LDO_ANAMIC1,
456 .owner = THIS_MODULE,
457 .n_voltages = 1,
458 },
459 .fixed_uV = 2050000,
460 .update_bank = 0x03,
461 .update_reg = 0x83,
462 .update_mask = 0x08,
463 .update_val_enable = 0x08,
464 },
465 [AB8500_LDO_ANAMIC2] = {
466 .desc = {
467 .name = "LDO-ANAMIC2",
468 .ops = &ab8500_regulator_fixed_ops,
469 .type = REGULATOR_VOLTAGE,
470 .id = AB8500_LDO_ANAMIC2,
471 .owner = THIS_MODULE,
472 .n_voltages = 1,
473 },
474 .fixed_uV = 2050000,
475 .update_bank = 0x03,
476 .update_reg = 0x83,
477 .update_mask = 0x10,
478 .update_val_enable = 0x10,
479 },
480 [AB8500_LDO_DMIC] = {
481 .desc = {
482 .name = "LDO-DMIC",
483 .ops = &ab8500_regulator_fixed_ops,
484 .type = REGULATOR_VOLTAGE,
485 .id = AB8500_LDO_DMIC,
486 .owner = THIS_MODULE,
487 .n_voltages = 1,
488 },
489 .fixed_uV = 1800000,
490 .update_bank = 0x03,
491 .update_reg = 0x83,
492 .update_mask = 0x04,
493 .update_val_enable = 0x04,
494 },
495 [AB8500_LDO_ANA] = {
496 .desc = {
497 .name = "LDO-ANA",
498 .ops = &ab8500_regulator_fixed_ops,
499 .type = REGULATOR_VOLTAGE,
500 .id = AB8500_LDO_ANA,
501 .owner = THIS_MODULE,
502 .n_voltages = 1,
503 },
504 .fixed_uV = 1200000,
505 .update_bank = 0x04,
506 .update_reg = 0x06,
507 .update_mask = 0x0c,
508 .update_val_enable = 0x04,
509 },
510
511
512 };
513
514 static __devinit int ab8500_regulator_probe(struct platform_device *pdev)
515 {
516 struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
517 struct ab8500_platform_data *pdata;
518 int i, err;
519
520 if (!ab8500) {
521 dev_err(&pdev->dev, "null mfd parent\n");
522 return -EINVAL;
523 }
524 pdata = dev_get_platdata(ab8500->dev);
525 if (!pdata) {
526 dev_err(&pdev->dev, "null pdata\n");
527 return -EINVAL;
528 }
529
530 /* make sure the platform data has the correct size */
531 if (pdata->num_regulator != ARRAY_SIZE(ab8500_regulator_info)) {
532 dev_err(&pdev->dev, "platform configuration error\n");
533 return -EINVAL;
534 }
535
536 /* register all regulators */
537 for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
538 struct ab8500_regulator_info *info = NULL;
539
540 /* assign per-regulator data */
541 info = &ab8500_regulator_info[i];
542 info->dev = &pdev->dev;
543
544 /* fix for hardware before ab8500v2.0 */
545 if (abx500_get_chip_id(info->dev) < 0x20) {
546 if (info->desc.id == AB8500_LDO_AUX3) {
547 info->desc.n_voltages =
548 ARRAY_SIZE(ldo_vauxn_voltages);
549 info->voltages = ldo_vauxn_voltages;
550 info->voltages_len =
551 ARRAY_SIZE(ldo_vauxn_voltages);
552 info->voltage_mask = 0xf;
553 }
554 }
555
556 /* register regulator with framework */
557 info->regulator = regulator_register(&info->desc, &pdev->dev,
558 &pdata->regulator[i], info);
559 if (IS_ERR(info->regulator)) {
560 err = PTR_ERR(info->regulator);
561 dev_err(&pdev->dev, "failed to register regulator %s\n",
562 info->desc.name);
563 /* when we fail, un-register all earlier regulators */
564 while (--i >= 0) {
565 info = &ab8500_regulator_info[i];
566 regulator_unregister(info->regulator);
567 }
568 return err;
569 }
570
571 dev_vdbg(rdev_get_dev(info->regulator),
572 "%s-probed\n", info->desc.name);
573 }
574
575 return 0;
576 }
577
578 static __devexit int ab8500_regulator_remove(struct platform_device *pdev)
579 {
580 int i;
581
582 for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
583 struct ab8500_regulator_info *info = NULL;
584 info = &ab8500_regulator_info[i];
585
586 dev_vdbg(rdev_get_dev(info->regulator),
587 "%s-remove\n", info->desc.name);
588
589 regulator_unregister(info->regulator);
590 }
591
592 return 0;
593 }
594
595 static struct platform_driver ab8500_regulator_driver = {
596 .probe = ab8500_regulator_probe,
597 .remove = __devexit_p(ab8500_regulator_remove),
598 .driver = {
599 .name = "ab8500-regulator",
600 .owner = THIS_MODULE,
601 },
602 };
603
604 static int __init ab8500_regulator_init(void)
605 {
606 int ret;
607
608 ret = platform_driver_register(&ab8500_regulator_driver);
609 if (ret != 0)
610 pr_err("Failed to register ab8500 regulator: %d\n", ret);
611
612 return ret;
613 }
614 subsys_initcall(ab8500_regulator_init);
615
616 static void __exit ab8500_regulator_exit(void)
617 {
618 platform_driver_unregister(&ab8500_regulator_driver);
619 }
620 module_exit(ab8500_regulator_exit);
621
622 MODULE_LICENSE("GPL v2");
623 MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
624 MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC");
625 MODULE_ALIAS("platform:ab8500-regulator");
(deprecated) Btrfs devel tree