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Linux 4.1.16
[linux/fpc-iii.git] / drivers / regulator / db8500-prcmu.c
blob7cec535cf0bcaec3604d8ffd16662a27f1f0bee2
1 /*
2 * Copyright (C) ST-Ericsson SA 2010
3 *
4 * License Terms: GNU General Public License v2
5 * Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
6 * Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
7 *
8 * Power domain regulators on DB8500
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/err.h>
14 #include <linux/spinlock.h>
15 #include <linux/platform_device.h>
16 #include <linux/mfd/dbx500-prcmu.h>
17 #include <linux/regulator/driver.h>
18 #include <linux/regulator/machine.h>
19 #include <linux/regulator/db8500-prcmu.h>
20 #include <linux/regulator/of_regulator.h>
21 #include <linux/of.h>
22 #include <linux/module.h>
23 #include "dbx500-prcmu.h"
24
25 static int db8500_regulator_enable(struct regulator_dev *rdev)
26 {
27 struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
28
29 if (info == NULL)
30 return -EINVAL;
31
32 dev_vdbg(rdev_get_dev(rdev), "regulator-%s-enable\n",
33 info->desc.name);
34
35 if (!info->is_enabled) {
36 info->is_enabled = true;
37 if (!info->exclude_from_power_state)
38 power_state_active_enable();
39 }
40
41 return 0;
42 }
43
44 static int db8500_regulator_disable(struct regulator_dev *rdev)
45 {
46 struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
47 int ret = 0;
48
49 if (info == NULL)
50 return -EINVAL;
51
52 dev_vdbg(rdev_get_dev(rdev), "regulator-%s-disable\n",
53 info->desc.name);
54
55 if (info->is_enabled) {
56 info->is_enabled = false;
57 if (!info->exclude_from_power_state)
58 ret = power_state_active_disable();
59 }
60
61 return ret;
62 }
63
64 static int db8500_regulator_is_enabled(struct regulator_dev *rdev)
65 {
66 struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
67
68 if (info == NULL)
69 return -EINVAL;
70
71 dev_vdbg(rdev_get_dev(rdev), "regulator-%s-is_enabled (is_enabled):"
72 " %i\n", info->desc.name, info->is_enabled);
73
74 return info->is_enabled;
75 }
76
77 /* db8500 regulator operations */
78 static struct regulator_ops db8500_regulator_ops = {
79 .enable = db8500_regulator_enable,
80 .disable = db8500_regulator_disable,
81 .is_enabled = db8500_regulator_is_enabled,
82 };
83
84 /*
85 * EPOD control
86 */
87 static bool epod_on[NUM_EPOD_ID];
88 static bool epod_ramret[NUM_EPOD_ID];
89
90 static int enable_epod(u16 epod_id, bool ramret)
91 {
92 int ret;
93
94 if (ramret) {
95 if (!epod_on[epod_id]) {
96 ret = prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
97 if (ret < 0)
98 return ret;
99 }
100 epod_ramret[epod_id] = true;
101 } else {
102 ret = prcmu_set_epod(epod_id, EPOD_STATE_ON);
103 if (ret < 0)
104 return ret;
105 epod_on[epod_id] = true;
106 }
107
108 return 0;
109 }
110
111 static int disable_epod(u16 epod_id, bool ramret)
112 {
113 int ret;
114
115 if (ramret) {
116 if (!epod_on[epod_id]) {
117 ret = prcmu_set_epod(epod_id, EPOD_STATE_OFF);
118 if (ret < 0)
119 return ret;
120 }
121 epod_ramret[epod_id] = false;
122 } else {
123 if (epod_ramret[epod_id]) {
124 ret = prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
125 if (ret < 0)
126 return ret;
127 } else {
128 ret = prcmu_set_epod(epod_id, EPOD_STATE_OFF);
129 if (ret < 0)
130 return ret;
131 }
132 epod_on[epod_id] = false;
133 }
134
135 return 0;
136 }
137
138 /*
139 * Regulator switch
140 */
141 static int db8500_regulator_switch_enable(struct regulator_dev *rdev)
142 {
143 struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
144 int ret;
145
146 if (info == NULL)
147 return -EINVAL;
148
149 dev_vdbg(rdev_get_dev(rdev), "regulator-switch-%s-enable\n",
150 info->desc.name);
151
152 ret = enable_epod(info->epod_id, info->is_ramret);
153 if (ret < 0) {
154 dev_err(rdev_get_dev(rdev),
155 "regulator-switch-%s-enable: prcmu call failed\n",
156 info->desc.name);
157 goto out;
158 }
159
160 info->is_enabled = true;
161 out:
162 return ret;
163 }
164
165 static int db8500_regulator_switch_disable(struct regulator_dev *rdev)
166 {
167 struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
168 int ret;
169
170 if (info == NULL)
171 return -EINVAL;
172
173 dev_vdbg(rdev_get_dev(rdev), "regulator-switch-%s-disable\n",
174 info->desc.name);
175
176 ret = disable_epod(info->epod_id, info->is_ramret);
177 if (ret < 0) {
178 dev_err(rdev_get_dev(rdev),
179 "regulator_switch-%s-disable: prcmu call failed\n",
180 info->desc.name);
181 goto out;
182 }
183
184 info->is_enabled = 0;
185 out:
186 return ret;
187 }
188
189 static int db8500_regulator_switch_is_enabled(struct regulator_dev *rdev)
190 {
191 struct dbx500_regulator_info *info = rdev_get_drvdata(rdev);
192
193 if (info == NULL)
194 return -EINVAL;
195
196 dev_vdbg(rdev_get_dev(rdev),
197 "regulator-switch-%s-is_enabled (is_enabled): %i\n",
198 info->desc.name, info->is_enabled);
199
200 return info->is_enabled;
201 }
202
203 static struct regulator_ops db8500_regulator_switch_ops = {
204 .enable = db8500_regulator_switch_enable,
205 .disable = db8500_regulator_switch_disable,
206 .is_enabled = db8500_regulator_switch_is_enabled,
207 };
208
209 /*
210 * Regulator information
211 */
212 static struct dbx500_regulator_info
213 dbx500_regulator_info[DB8500_NUM_REGULATORS] = {
214 [DB8500_REGULATOR_VAPE] = {
215 .desc = {
216 .name = "db8500-vape",
217 .id = DB8500_REGULATOR_VAPE,
218 .ops = &db8500_regulator_ops,
219 .type = REGULATOR_VOLTAGE,
220 .owner = THIS_MODULE,
221 },
222 },
223 [DB8500_REGULATOR_VARM] = {
224 .desc = {
225 .name = "db8500-varm",
226 .id = DB8500_REGULATOR_VARM,
227 .ops = &db8500_regulator_ops,
228 .type = REGULATOR_VOLTAGE,
229 .owner = THIS_MODULE,
230 },
231 },
232 [DB8500_REGULATOR_VMODEM] = {
233 .desc = {
234 .name = "db8500-vmodem",
235 .id = DB8500_REGULATOR_VMODEM,
236 .ops = &db8500_regulator_ops,
237 .type = REGULATOR_VOLTAGE,
238 .owner = THIS_MODULE,
239 },
240 },
241 [DB8500_REGULATOR_VPLL] = {
242 .desc = {
243 .name = "db8500-vpll",
244 .id = DB8500_REGULATOR_VPLL,
245 .ops = &db8500_regulator_ops,
246 .type = REGULATOR_VOLTAGE,
247 .owner = THIS_MODULE,
248 },
249 },
250 [DB8500_REGULATOR_VSMPS1] = {
251 .desc = {
252 .name = "db8500-vsmps1",
253 .id = DB8500_REGULATOR_VSMPS1,
254 .ops = &db8500_regulator_ops,
255 .type = REGULATOR_VOLTAGE,
256 .owner = THIS_MODULE,
257 },
258 },
259 [DB8500_REGULATOR_VSMPS2] = {
260 .desc = {
261 .name = "db8500-vsmps2",
262 .id = DB8500_REGULATOR_VSMPS2,
263 .ops = &db8500_regulator_ops,
264 .type = REGULATOR_VOLTAGE,
265 .owner = THIS_MODULE,
266 .fixed_uV = 1800000,
267 .n_voltages = 1,
268 },
269 .exclude_from_power_state = true,
270 },
271 [DB8500_REGULATOR_VSMPS3] = {
272 .desc = {
273 .name = "db8500-vsmps3",
274 .id = DB8500_REGULATOR_VSMPS3,
275 .ops = &db8500_regulator_ops,
276 .type = REGULATOR_VOLTAGE,
277 .owner = THIS_MODULE,
278 },
279 },
280 [DB8500_REGULATOR_VRF1] = {
281 .desc = {
282 .name = "db8500-vrf1",
283 .id = DB8500_REGULATOR_VRF1,
284 .ops = &db8500_regulator_ops,
285 .type = REGULATOR_VOLTAGE,
286 .owner = THIS_MODULE,
287 },
288 },
289 [DB8500_REGULATOR_SWITCH_SVAMMDSP] = {
290 .desc = {
291 .name = "db8500-sva-mmdsp",
292 .id = DB8500_REGULATOR_SWITCH_SVAMMDSP,
293 .ops = &db8500_regulator_switch_ops,
294 .type = REGULATOR_VOLTAGE,
295 .owner = THIS_MODULE,
296 },
297 .epod_id = EPOD_ID_SVAMMDSP,
298 },
299 [DB8500_REGULATOR_SWITCH_SVAMMDSPRET] = {
300 .desc = {
301 .name = "db8500-sva-mmdsp-ret",
302 .id = DB8500_REGULATOR_SWITCH_SVAMMDSPRET,
303 .ops = &db8500_regulator_switch_ops,
304 .type = REGULATOR_VOLTAGE,
305 .owner = THIS_MODULE,
306 },
307 .epod_id = EPOD_ID_SVAMMDSP,
308 .is_ramret = true,
309 },
310 [DB8500_REGULATOR_SWITCH_SVAPIPE] = {
311 .desc = {
312 .name = "db8500-sva-pipe",
313 .id = DB8500_REGULATOR_SWITCH_SVAPIPE,
314 .ops = &db8500_regulator_switch_ops,
315 .type = REGULATOR_VOLTAGE,
316 .owner = THIS_MODULE,
317 },
318 .epod_id = EPOD_ID_SVAPIPE,
319 },
320 [DB8500_REGULATOR_SWITCH_SIAMMDSP] = {
321 .desc = {
322 .name = "db8500-sia-mmdsp",
323 .id = DB8500_REGULATOR_SWITCH_SIAMMDSP,
324 .ops = &db8500_regulator_switch_ops,
325 .type = REGULATOR_VOLTAGE,
326 .owner = THIS_MODULE,
327 },
328 .epod_id = EPOD_ID_SIAMMDSP,
329 },
330 [DB8500_REGULATOR_SWITCH_SIAMMDSPRET] = {
331 .desc = {
332 .name = "db8500-sia-mmdsp-ret",
333 .id = DB8500_REGULATOR_SWITCH_SIAMMDSPRET,
334 .ops = &db8500_regulator_switch_ops,
335 .type = REGULATOR_VOLTAGE,
336 .owner = THIS_MODULE,
337 },
338 .epod_id = EPOD_ID_SIAMMDSP,
339 .is_ramret = true,
340 },
341 [DB8500_REGULATOR_SWITCH_SIAPIPE] = {
342 .desc = {
343 .name = "db8500-sia-pipe",
344 .id = DB8500_REGULATOR_SWITCH_SIAPIPE,
345 .ops = &db8500_regulator_switch_ops,
346 .type = REGULATOR_VOLTAGE,
347 .owner = THIS_MODULE,
348 },
349 .epod_id = EPOD_ID_SIAPIPE,
350 },
351 [DB8500_REGULATOR_SWITCH_SGA] = {
352 .desc = {
353 .name = "db8500-sga",
354 .id = DB8500_REGULATOR_SWITCH_SGA,
355 .ops = &db8500_regulator_switch_ops,
356 .type = REGULATOR_VOLTAGE,
357 .owner = THIS_MODULE,
358 },
359 .epod_id = EPOD_ID_SGA,
360 },
361 [DB8500_REGULATOR_SWITCH_B2R2_MCDE] = {
362 .desc = {
363 .name = "db8500-b2r2-mcde",
364 .id = DB8500_REGULATOR_SWITCH_B2R2_MCDE,
365 .ops = &db8500_regulator_switch_ops,
366 .type = REGULATOR_VOLTAGE,
367 .owner = THIS_MODULE,
368 },
369 .epod_id = EPOD_ID_B2R2_MCDE,
370 },
371 [DB8500_REGULATOR_SWITCH_ESRAM12] = {
372 .desc = {
373 .name = "db8500-esram12",
374 .id = DB8500_REGULATOR_SWITCH_ESRAM12,
375 .ops = &db8500_regulator_switch_ops,
376 .type = REGULATOR_VOLTAGE,
377 .owner = THIS_MODULE,
378 },
379 .epod_id = EPOD_ID_ESRAM12,
380 .is_enabled = true,
381 },
382 [DB8500_REGULATOR_SWITCH_ESRAM12RET] = {
383 .desc = {
384 .name = "db8500-esram12-ret",
385 .id = DB8500_REGULATOR_SWITCH_ESRAM12RET,
386 .ops = &db8500_regulator_switch_ops,
387 .type = REGULATOR_VOLTAGE,
388 .owner = THIS_MODULE,
389 },
390 .epod_id = EPOD_ID_ESRAM12,
391 .is_ramret = true,
392 },
393 [DB8500_REGULATOR_SWITCH_ESRAM34] = {
394 .desc = {
395 .name = "db8500-esram34",
396 .id = DB8500_REGULATOR_SWITCH_ESRAM34,
397 .ops = &db8500_regulator_switch_ops,
398 .type = REGULATOR_VOLTAGE,
399 .owner = THIS_MODULE,
400 },
401 .epod_id = EPOD_ID_ESRAM34,
402 .is_enabled = true,
403 },
404 [DB8500_REGULATOR_SWITCH_ESRAM34RET] = {
405 .desc = {
406 .name = "db8500-esram34-ret",
407 .id = DB8500_REGULATOR_SWITCH_ESRAM34RET,
408 .ops = &db8500_regulator_switch_ops,
409 .type = REGULATOR_VOLTAGE,
410 .owner = THIS_MODULE,
411 },
412 .epod_id = EPOD_ID_ESRAM34,
413 .is_ramret = true,
414 },
415 };
416
417 static int db8500_regulator_register(struct platform_device *pdev,
418 struct regulator_init_data *init_data,
419 int id,
420 struct device_node *np)
421 {
422 struct dbx500_regulator_info *info;
423 struct regulator_config config = { };
424 int err;
425
426 /* assign per-regulator data */
427 info = &dbx500_regulator_info[id];
428 info->dev = &pdev->dev;
429
430 config.dev = &pdev->dev;
431 config.init_data = init_data;
432 config.driver_data = info;
433 config.of_node = np;
434
435 /* register with the regulator framework */
436 info->rdev = devm_regulator_register(&pdev->dev, &info->desc, &config);
437 if (IS_ERR(info->rdev)) {
438 err = PTR_ERR(info->rdev);
439 dev_err(&pdev->dev, "failed to register %s: err %i\n",
440 info->desc.name, err);
441 return err;
442 }
443
444 dev_dbg(rdev_get_dev(info->rdev),
445 "regulator-%s-probed\n", info->desc.name);
446
447 return 0;
448 }
449
450 static struct of_regulator_match db8500_regulator_matches[] = {
451 { .name = "db8500_vape", .driver_data = (void *) DB8500_REGULATOR_VAPE, },
452 { .name = "db8500_varm", .driver_data = (void *) DB8500_REGULATOR_VARM, },
453 { .name = "db8500_vmodem", .driver_data = (void *) DB8500_REGULATOR_VMODEM, },
454 { .name = "db8500_vpll", .driver_data = (void *) DB8500_REGULATOR_VPLL, },
455 { .name = "db8500_vsmps1", .driver_data = (void *) DB8500_REGULATOR_VSMPS1, },
456 { .name = "db8500_vsmps2", .driver_data = (void *) DB8500_REGULATOR_VSMPS2, },
457 { .name = "db8500_vsmps3", .driver_data = (void *) DB8500_REGULATOR_VSMPS3, },
458 { .name = "db8500_vrf1", .driver_data = (void *) DB8500_REGULATOR_VRF1, },
459 { .name = "db8500_sva_mmdsp", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SVAMMDSP, },
460 { .name = "db8500_sva_mmdsp_ret", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SVAMMDSPRET, },
461 { .name = "db8500_sva_pipe", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SVAPIPE, },
462 { .name = "db8500_sia_mmdsp", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SIAMMDSP, },
463 { .name = "db8500_sia_mmdsp_ret", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SIAMMDSPRET, },
464 { .name = "db8500_sia_pipe", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SIAPIPE, },
465 { .name = "db8500_sga", .driver_data = (void *) DB8500_REGULATOR_SWITCH_SGA, },
466 { .name = "db8500_b2r2_mcde", .driver_data = (void *) DB8500_REGULATOR_SWITCH_B2R2_MCDE, },
467 { .name = "db8500_esram12", .driver_data = (void *) DB8500_REGULATOR_SWITCH_ESRAM12, },
468 { .name = "db8500_esram12_ret", .driver_data = (void *) DB8500_REGULATOR_SWITCH_ESRAM12RET, },
469 { .name = "db8500_esram34", .driver_data = (void *) DB8500_REGULATOR_SWITCH_ESRAM34, },
470 { .name = "db8500_esram34_ret", .driver_data = (void *) DB8500_REGULATOR_SWITCH_ESRAM34RET, },
471 };
472
473 static int
474 db8500_regulator_of_probe(struct platform_device *pdev,
475 struct device_node *np)
476 {
477 int i, err;
478
479 for (i = 0; i < ARRAY_SIZE(dbx500_regulator_info); i++) {
480 err = db8500_regulator_register(
481 pdev, db8500_regulator_matches[i].init_data,
482 i, db8500_regulator_matches[i].of_node);
483 if (err)
484 return err;
485 }
486
487 return 0;
488 }
489
490 static int db8500_regulator_probe(struct platform_device *pdev)
491 {
492 struct regulator_init_data *db8500_init_data =
493 dev_get_platdata(&pdev->dev);
494 struct device_node *np = pdev->dev.of_node;
495 int i, err;
496
497 /* register all regulators */
498 if (np) {
499 err = of_regulator_match(&pdev->dev, np,
500 db8500_regulator_matches,
501 ARRAY_SIZE(db8500_regulator_matches));
502 if (err < 0) {
503 dev_err(&pdev->dev,
504 "Error parsing regulator init data: %d\n", err);
505 return err;
506 }
507
508 err = db8500_regulator_of_probe(pdev, np);
509 if (err)
510 return err;
511 } else {
512 for (i = 0; i < ARRAY_SIZE(dbx500_regulator_info); i++) {
513 err = db8500_regulator_register(pdev,
514 &db8500_init_data[i],
515 i, NULL);
516 if (err)
517 return err;
518 }
519 }
520
521 err = ux500_regulator_debug_init(pdev,
522 dbx500_regulator_info,
523 ARRAY_SIZE(dbx500_regulator_info));
524 return 0;
525 }
526
527 static int db8500_regulator_remove(struct platform_device *pdev)
528 {
529 ux500_regulator_debug_exit();
530
531 return 0;
532 }
533
534 static struct platform_driver db8500_regulator_driver = {
535 .driver = {
536 .name = "db8500-prcmu-regulators",
537 },
538 .probe = db8500_regulator_probe,
539 .remove = db8500_regulator_remove,
540 };
541
542 static int __init db8500_regulator_init(void)
543 {
544 return platform_driver_register(&db8500_regulator_driver);
545 }
546
547 static void __exit db8500_regulator_exit(void)
548 {
549 platform_driver_unregister(&db8500_regulator_driver);
550 }
551
552 arch_initcall(db8500_regulator_init);
553 module_exit(db8500_regulator_exit);
554
555 MODULE_AUTHOR("STMicroelectronics/ST-Ericsson");
556 MODULE_DESCRIPTION("DB8500 regulator driver");
557 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support