1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * devres.c -- Voltage/Current Regulator framework devres implementation. |
4 | * |
5 | * Copyright 2013 Linaro Ltd |
6 | */ |
7 | |
8 | #include <linux/kernel.h> |
9 | #include <linux/err.h> |
10 | #include <linux/regmap.h> |
11 | #include <linux/regulator/consumer.h> |
12 | #include <linux/regulator/driver.h> |
13 | #include <linux/module.h> |
14 | |
15 | #include "internal.h" |
16 | |
17 | static void devm_regulator_release(struct device *dev, void *res) |
18 | { |
19 | regulator_put(regulator: *(struct regulator **)res); |
20 | } |
21 | |
22 | static struct regulator *_devm_regulator_get(struct device *dev, const char *id, |
23 | int get_type) |
24 | { |
25 | struct regulator **ptr, *regulator; |
26 | |
27 | ptr = devres_alloc(devm_regulator_release, sizeof(*ptr), GFP_KERNEL); |
28 | if (!ptr) |
29 | return ERR_PTR(error: -ENOMEM); |
30 | |
31 | regulator = _regulator_get(dev, id, get_type); |
32 | if (!IS_ERR(ptr: regulator)) { |
33 | *ptr = regulator; |
34 | devres_add(dev, res: ptr); |
35 | } else { |
36 | devres_free(res: ptr); |
37 | } |
38 | |
39 | return regulator; |
40 | } |
41 | |
42 | /** |
43 | * devm_regulator_get - Resource managed regulator_get() |
44 | * @dev: device to supply |
45 | * @id: supply name or regulator ID. |
46 | * |
47 | * Managed regulator_get(). Regulators returned from this function are |
48 | * automatically regulator_put() on driver detach. See regulator_get() for more |
49 | * information. |
50 | */ |
51 | struct regulator *devm_regulator_get(struct device *dev, const char *id) |
52 | { |
53 | return _devm_regulator_get(dev, id, get_type: NORMAL_GET); |
54 | } |
55 | EXPORT_SYMBOL_GPL(devm_regulator_get); |
56 | |
57 | /** |
58 | * devm_regulator_get_exclusive - Resource managed regulator_get_exclusive() |
59 | * @dev: device to supply |
60 | * @id: supply name or regulator ID. |
61 | * |
62 | * Managed regulator_get_exclusive(). Regulators returned from this function |
63 | * are automatically regulator_put() on driver detach. See regulator_get() for |
64 | * more information. |
65 | */ |
66 | struct regulator *devm_regulator_get_exclusive(struct device *dev, |
67 | const char *id) |
68 | { |
69 | return _devm_regulator_get(dev, id, get_type: EXCLUSIVE_GET); |
70 | } |
71 | EXPORT_SYMBOL_GPL(devm_regulator_get_exclusive); |
72 | |
73 | static void regulator_action_disable(void *d) |
74 | { |
75 | struct regulator *r = (struct regulator *)d; |
76 | |
77 | regulator_disable(regulator: r); |
78 | } |
79 | |
80 | static int _devm_regulator_get_enable(struct device *dev, const char *id, |
81 | int get_type) |
82 | { |
83 | struct regulator *r; |
84 | int ret; |
85 | |
86 | r = _devm_regulator_get(dev, id, get_type); |
87 | if (IS_ERR(ptr: r)) |
88 | return PTR_ERR(ptr: r); |
89 | |
90 | ret = regulator_enable(regulator: r); |
91 | if (!ret) |
92 | ret = devm_add_action_or_reset(dev, ®ulator_action_disable, r); |
93 | |
94 | if (ret) |
95 | devm_regulator_put(regulator: r); |
96 | |
97 | return ret; |
98 | } |
99 | |
100 | /** |
101 | * devm_regulator_get_enable_optional - Resource managed regulator get and enable |
102 | * @dev: device to supply |
103 | * @id: supply name or regulator ID. |
104 | * |
105 | * Get and enable regulator for duration of the device life-time. |
106 | * regulator_disable() and regulator_put() are automatically called on driver |
107 | * detach. See regulator_get_optional() and regulator_enable() for more |
108 | * information. |
109 | */ |
110 | int devm_regulator_get_enable_optional(struct device *dev, const char *id) |
111 | { |
112 | return _devm_regulator_get_enable(dev, id, get_type: OPTIONAL_GET); |
113 | } |
114 | EXPORT_SYMBOL_GPL(devm_regulator_get_enable_optional); |
115 | |
116 | /** |
117 | * devm_regulator_get_enable - Resource managed regulator get and enable |
118 | * @dev: device to supply |
119 | * @id: supply name or regulator ID. |
120 | * |
121 | * Get and enable regulator for duration of the device life-time. |
122 | * regulator_disable() and regulator_put() are automatically called on driver |
123 | * detach. See regulator_get() and regulator_enable() for more |
124 | * information. |
125 | */ |
126 | int devm_regulator_get_enable(struct device *dev, const char *id) |
127 | { |
128 | return _devm_regulator_get_enable(dev, id, get_type: NORMAL_GET); |
129 | } |
130 | EXPORT_SYMBOL_GPL(devm_regulator_get_enable); |
131 | |
132 | /** |
133 | * devm_regulator_get_optional - Resource managed regulator_get_optional() |
134 | * @dev: device to supply |
135 | * @id: supply name or regulator ID. |
136 | * |
137 | * Managed regulator_get_optional(). Regulators returned from this |
138 | * function are automatically regulator_put() on driver detach. See |
139 | * regulator_get_optional() for more information. |
140 | */ |
141 | struct regulator *devm_regulator_get_optional(struct device *dev, |
142 | const char *id) |
143 | { |
144 | return _devm_regulator_get(dev, id, get_type: OPTIONAL_GET); |
145 | } |
146 | EXPORT_SYMBOL_GPL(devm_regulator_get_optional); |
147 | |
148 | static int devm_regulator_match(struct device *dev, void *res, void *data) |
149 | { |
150 | struct regulator **r = res; |
151 | if (!r || !*r) { |
152 | WARN_ON(!r || !*r); |
153 | return 0; |
154 | } |
155 | return *r == data; |
156 | } |
157 | |
158 | /** |
159 | * devm_regulator_put - Resource managed regulator_put() |
160 | * @regulator: regulator to free |
161 | * |
162 | * Deallocate a regulator allocated with devm_regulator_get(). Normally |
163 | * this function will not need to be called and the resource management |
164 | * code will ensure that the resource is freed. |
165 | */ |
166 | void devm_regulator_put(struct regulator *regulator) |
167 | { |
168 | int rc; |
169 | |
170 | rc = devres_release(dev: regulator->dev, release: devm_regulator_release, |
171 | match: devm_regulator_match, match_data: regulator); |
172 | if (rc != 0) |
173 | WARN_ON(rc); |
174 | } |
175 | EXPORT_SYMBOL_GPL(devm_regulator_put); |
176 | |
177 | struct regulator_bulk_devres { |
178 | struct regulator_bulk_data *consumers; |
179 | int num_consumers; |
180 | }; |
181 | |
182 | static void devm_regulator_bulk_release(struct device *dev, void *res) |
183 | { |
184 | struct regulator_bulk_devres *devres = res; |
185 | |
186 | regulator_bulk_free(num_consumers: devres->num_consumers, consumers: devres->consumers); |
187 | } |
188 | |
189 | static int _devm_regulator_bulk_get(struct device *dev, int num_consumers, |
190 | struct regulator_bulk_data *consumers, |
191 | enum regulator_get_type get_type) |
192 | { |
193 | struct regulator_bulk_devres *devres; |
194 | int ret; |
195 | |
196 | devres = devres_alloc(devm_regulator_bulk_release, |
197 | sizeof(*devres), GFP_KERNEL); |
198 | if (!devres) |
199 | return -ENOMEM; |
200 | |
201 | ret = _regulator_bulk_get(dev, num_consumers, consumers, get_type); |
202 | if (!ret) { |
203 | devres->consumers = consumers; |
204 | devres->num_consumers = num_consumers; |
205 | devres_add(dev, res: devres); |
206 | } else { |
207 | devres_free(res: devres); |
208 | } |
209 | |
210 | return ret; |
211 | } |
212 | |
213 | /** |
214 | * devm_regulator_bulk_get - managed get multiple regulator consumers |
215 | * |
216 | * @dev: device to supply |
217 | * @num_consumers: number of consumers to register |
218 | * @consumers: configuration of consumers; clients are stored here. |
219 | * |
220 | * @return 0 on success, an errno on failure. |
221 | * |
222 | * This helper function allows drivers to get several regulator |
223 | * consumers in one operation with management, the regulators will |
224 | * automatically be freed when the device is unbound. If any of the |
225 | * regulators cannot be acquired then any regulators that were |
226 | * allocated will be freed before returning to the caller. |
227 | */ |
228 | int devm_regulator_bulk_get(struct device *dev, int num_consumers, |
229 | struct regulator_bulk_data *consumers) |
230 | { |
231 | return _devm_regulator_bulk_get(dev, num_consumers, consumers, get_type: NORMAL_GET); |
232 | } |
233 | EXPORT_SYMBOL_GPL(devm_regulator_bulk_get); |
234 | |
235 | /** |
236 | * devm_regulator_bulk_get_exclusive - managed exclusive get of multiple |
237 | * regulator consumers |
238 | * |
239 | * @dev: device to supply |
240 | * @num_consumers: number of consumers to register |
241 | * @consumers: configuration of consumers; clients are stored here. |
242 | * |
243 | * @return 0 on success, an errno on failure. |
244 | * |
245 | * This helper function allows drivers to exclusively get several |
246 | * regulator consumers in one operation with management, the regulators |
247 | * will automatically be freed when the device is unbound. If any of |
248 | * the regulators cannot be acquired then any regulators that were |
249 | * allocated will be freed before returning to the caller. |
250 | */ |
251 | int devm_regulator_bulk_get_exclusive(struct device *dev, int num_consumers, |
252 | struct regulator_bulk_data *consumers) |
253 | { |
254 | return _devm_regulator_bulk_get(dev, num_consumers, consumers, get_type: EXCLUSIVE_GET); |
255 | } |
256 | EXPORT_SYMBOL_GPL(devm_regulator_bulk_get_exclusive); |
257 | |
258 | /** |
259 | * devm_regulator_bulk_get_const - devm_regulator_bulk_get() w/ const data |
260 | * |
261 | * @dev: device to supply |
262 | * @num_consumers: number of consumers to register |
263 | * @in_consumers: const configuration of consumers |
264 | * @out_consumers: in_consumers is copied here and this is passed to |
265 | * devm_regulator_bulk_get(). |
266 | * |
267 | * This is a convenience function to allow bulk regulator configuration |
268 | * to be stored "static const" in files. |
269 | * |
270 | * Return: 0 on success, an errno on failure. |
271 | */ |
272 | int devm_regulator_bulk_get_const(struct device *dev, int num_consumers, |
273 | const struct regulator_bulk_data *in_consumers, |
274 | struct regulator_bulk_data **out_consumers) |
275 | { |
276 | *out_consumers = devm_kmemdup(dev, src: in_consumers, |
277 | len: num_consumers * sizeof(*in_consumers), |
278 | GFP_KERNEL); |
279 | if (*out_consumers == NULL) |
280 | return -ENOMEM; |
281 | |
282 | return devm_regulator_bulk_get(dev, num_consumers, *out_consumers); |
283 | } |
284 | EXPORT_SYMBOL_GPL(devm_regulator_bulk_get_const); |
285 | |
286 | static int devm_regulator_bulk_match(struct device *dev, void *res, |
287 | void *data) |
288 | { |
289 | struct regulator_bulk_devres *match = res; |
290 | struct regulator_bulk_data *target = data; |
291 | |
292 | /* |
293 | * We check the put uses same consumer list as the get did. |
294 | * We _could_ scan all entries in consumer array and check the |
295 | * regulators match but ATM I don't see the need. We can change this |
296 | * later if needed. |
297 | */ |
298 | return match->consumers == target; |
299 | } |
300 | |
301 | /** |
302 | * devm_regulator_bulk_put - Resource managed regulator_bulk_put() |
303 | * @consumers: consumers to free |
304 | * |
305 | * Deallocate regulators allocated with devm_regulator_bulk_get(). Normally |
306 | * this function will not need to be called and the resource management |
307 | * code will ensure that the resource is freed. |
308 | */ |
309 | void devm_regulator_bulk_put(struct regulator_bulk_data *consumers) |
310 | { |
311 | int rc; |
312 | struct regulator *regulator = consumers[0].consumer; |
313 | |
314 | rc = devres_release(dev: regulator->dev, release: devm_regulator_bulk_release, |
315 | match: devm_regulator_bulk_match, match_data: consumers); |
316 | if (rc != 0) |
317 | WARN_ON(rc); |
318 | } |
319 | EXPORT_SYMBOL_GPL(devm_regulator_bulk_put); |
320 | |
321 | static void devm_regulator_bulk_disable(void *res) |
322 | { |
323 | struct regulator_bulk_devres *devres = res; |
324 | int i; |
325 | |
326 | for (i = 0; i < devres->num_consumers; i++) |
327 | regulator_disable(regulator: devres->consumers[i].consumer); |
328 | } |
329 | |
330 | /** |
331 | * devm_regulator_bulk_get_enable - managed get'n enable multiple regulators |
332 | * |
333 | * @dev: device to supply |
334 | * @num_consumers: number of consumers to register |
335 | * @id: list of supply names or regulator IDs |
336 | * |
337 | * @return 0 on success, an errno on failure. |
338 | * |
339 | * This helper function allows drivers to get several regulator |
340 | * consumers in one operation with management, the regulators will |
341 | * automatically be freed when the device is unbound. If any of the |
342 | * regulators cannot be acquired then any regulators that were |
343 | * allocated will be freed before returning to the caller. |
344 | */ |
345 | int devm_regulator_bulk_get_enable(struct device *dev, int num_consumers, |
346 | const char * const *id) |
347 | { |
348 | struct regulator_bulk_devres *devres; |
349 | struct regulator_bulk_data *consumers; |
350 | int i, ret; |
351 | |
352 | devres = devm_kmalloc(dev, size: sizeof(*devres), GFP_KERNEL); |
353 | if (!devres) |
354 | return -ENOMEM; |
355 | |
356 | devres->consumers = devm_kcalloc(dev, n: num_consumers, size: sizeof(*consumers), |
357 | GFP_KERNEL); |
358 | consumers = devres->consumers; |
359 | if (!consumers) |
360 | return -ENOMEM; |
361 | |
362 | devres->num_consumers = num_consumers; |
363 | |
364 | for (i = 0; i < num_consumers; i++) |
365 | consumers[i].supply = id[i]; |
366 | |
367 | ret = devm_regulator_bulk_get(dev, num_consumers, consumers); |
368 | if (ret) |
369 | return ret; |
370 | |
371 | for (i = 0; i < num_consumers; i++) { |
372 | ret = regulator_enable(regulator: consumers[i].consumer); |
373 | if (ret) |
374 | goto unwind; |
375 | } |
376 | |
377 | ret = devm_add_action(dev, devm_regulator_bulk_disable, devres); |
378 | if (!ret) |
379 | return 0; |
380 | |
381 | unwind: |
382 | while (--i >= 0) |
383 | regulator_disable(regulator: consumers[i].consumer); |
384 | |
385 | devm_regulator_bulk_put(consumers); |
386 | |
387 | return ret; |
388 | } |
389 | EXPORT_SYMBOL_GPL(devm_regulator_bulk_get_enable); |
390 | |
391 | static void devm_rdev_release(struct device *dev, void *res) |
392 | { |
393 | regulator_unregister(rdev: *(struct regulator_dev **)res); |
394 | } |
395 | |
396 | /** |
397 | * devm_regulator_register - Resource managed regulator_register() |
398 | * @dev: device to supply |
399 | * @regulator_desc: regulator to register |
400 | * @config: runtime configuration for regulator |
401 | * |
402 | * Called by regulator drivers to register a regulator. Returns a |
403 | * valid pointer to struct regulator_dev on success or an ERR_PTR() on |
404 | * error. The regulator will automatically be released when the device |
405 | * is unbound. |
406 | */ |
407 | struct regulator_dev *devm_regulator_register(struct device *dev, |
408 | const struct regulator_desc *regulator_desc, |
409 | const struct regulator_config *config) |
410 | { |
411 | struct regulator_dev **ptr, *rdev; |
412 | |
413 | ptr = devres_alloc(devm_rdev_release, sizeof(*ptr), |
414 | GFP_KERNEL); |
415 | if (!ptr) |
416 | return ERR_PTR(error: -ENOMEM); |
417 | |
418 | rdev = regulator_register(dev, regulator_desc, config); |
419 | if (!IS_ERR(ptr: rdev)) { |
420 | *ptr = rdev; |
421 | devres_add(dev, res: ptr); |
422 | } else { |
423 | devres_free(res: ptr); |
424 | } |
425 | |
426 | return rdev; |
427 | } |
428 | EXPORT_SYMBOL_GPL(devm_regulator_register); |
429 | |
430 | struct regulator_supply_alias_match { |
431 | struct device *dev; |
432 | const char *id; |
433 | }; |
434 | |
435 | static int devm_regulator_match_supply_alias(struct device *dev, void *res, |
436 | void *data) |
437 | { |
438 | struct regulator_supply_alias_match *match = res; |
439 | struct regulator_supply_alias_match *target = data; |
440 | |
441 | return match->dev == target->dev && strcmp(match->id, target->id) == 0; |
442 | } |
443 | |
444 | static void devm_regulator_destroy_supply_alias(struct device *dev, void *res) |
445 | { |
446 | struct regulator_supply_alias_match *match = res; |
447 | |
448 | regulator_unregister_supply_alias(dev: match->dev, id: match->id); |
449 | } |
450 | |
451 | /** |
452 | * devm_regulator_register_supply_alias - Resource managed |
453 | * regulator_register_supply_alias() |
454 | * |
455 | * @dev: device to supply |
456 | * @id: supply name or regulator ID |
457 | * @alias_dev: device that should be used to lookup the supply |
458 | * @alias_id: supply name or regulator ID that should be used to lookup the |
459 | * supply |
460 | * |
461 | * The supply alias will automatically be unregistered when the source |
462 | * device is unbound. |
463 | */ |
464 | int devm_regulator_register_supply_alias(struct device *dev, const char *id, |
465 | struct device *alias_dev, |
466 | const char *alias_id) |
467 | { |
468 | struct regulator_supply_alias_match *match; |
469 | int ret; |
470 | |
471 | match = devres_alloc(devm_regulator_destroy_supply_alias, |
472 | sizeof(struct regulator_supply_alias_match), |
473 | GFP_KERNEL); |
474 | if (!match) |
475 | return -ENOMEM; |
476 | |
477 | match->dev = dev; |
478 | match->id = id; |
479 | |
480 | ret = regulator_register_supply_alias(dev, id, alias_dev, alias_id); |
481 | if (ret < 0) { |
482 | devres_free(res: match); |
483 | return ret; |
484 | } |
485 | |
486 | devres_add(dev, res: match); |
487 | |
488 | return 0; |
489 | } |
490 | EXPORT_SYMBOL_GPL(devm_regulator_register_supply_alias); |
491 | |
492 | static void devm_regulator_unregister_supply_alias(struct device *dev, |
493 | const char *id) |
494 | { |
495 | struct regulator_supply_alias_match match; |
496 | int rc; |
497 | |
498 | match.dev = dev; |
499 | match.id = id; |
500 | |
501 | rc = devres_release(dev, release: devm_regulator_destroy_supply_alias, |
502 | match: devm_regulator_match_supply_alias, match_data: &match); |
503 | if (rc != 0) |
504 | WARN_ON(rc); |
505 | } |
506 | |
507 | /** |
508 | * devm_regulator_bulk_register_supply_alias - Managed register |
509 | * multiple aliases |
510 | * |
511 | * @dev: device to supply |
512 | * @id: list of supply names or regulator IDs |
513 | * @alias_dev: device that should be used to lookup the supply |
514 | * @alias_id: list of supply names or regulator IDs that should be used to |
515 | * lookup the supply |
516 | * @num_id: number of aliases to register |
517 | * |
518 | * @return 0 on success, an errno on failure. |
519 | * |
520 | * This helper function allows drivers to register several supply |
521 | * aliases in one operation, the aliases will be automatically |
522 | * unregisters when the source device is unbound. If any of the |
523 | * aliases cannot be registered any aliases that were registered |
524 | * will be removed before returning to the caller. |
525 | */ |
526 | int devm_regulator_bulk_register_supply_alias(struct device *dev, |
527 | const char *const *id, |
528 | struct device *alias_dev, |
529 | const char *const *alias_id, |
530 | int num_id) |
531 | { |
532 | int i; |
533 | int ret; |
534 | |
535 | for (i = 0; i < num_id; ++i) { |
536 | ret = devm_regulator_register_supply_alias(dev, id[i], |
537 | alias_dev, |
538 | alias_id[i]); |
539 | if (ret < 0) |
540 | goto err; |
541 | } |
542 | |
543 | return 0; |
544 | |
545 | err: |
546 | dev_err(dev, |
547 | "Failed to create supply alias %s,%s -> %s,%s\n" , |
548 | id[i], dev_name(dev), alias_id[i], dev_name(alias_dev)); |
549 | |
550 | while (--i >= 0) |
551 | devm_regulator_unregister_supply_alias(dev, id: id[i]); |
552 | |
553 | return ret; |
554 | } |
555 | EXPORT_SYMBOL_GPL(devm_regulator_bulk_register_supply_alias); |
556 | |
557 | struct regulator_notifier_match { |
558 | struct regulator *regulator; |
559 | struct notifier_block *nb; |
560 | }; |
561 | |
562 | static int devm_regulator_match_notifier(struct device *dev, void *res, |
563 | void *data) |
564 | { |
565 | struct regulator_notifier_match *match = res; |
566 | struct regulator_notifier_match *target = data; |
567 | |
568 | return match->regulator == target->regulator && match->nb == target->nb; |
569 | } |
570 | |
571 | static void devm_regulator_destroy_notifier(struct device *dev, void *res) |
572 | { |
573 | struct regulator_notifier_match *match = res; |
574 | |
575 | regulator_unregister_notifier(regulator: match->regulator, nb: match->nb); |
576 | } |
577 | |
578 | /** |
579 | * devm_regulator_register_notifier - Resource managed |
580 | * regulator_register_notifier |
581 | * |
582 | * @regulator: regulator source |
583 | * @nb: notifier block |
584 | * |
585 | * The notifier will be registers under the consumer device and be |
586 | * automatically be unregistered when the source device is unbound. |
587 | */ |
588 | int devm_regulator_register_notifier(struct regulator *regulator, |
589 | struct notifier_block *nb) |
590 | { |
591 | struct regulator_notifier_match *match; |
592 | int ret; |
593 | |
594 | match = devres_alloc(devm_regulator_destroy_notifier, |
595 | sizeof(struct regulator_notifier_match), |
596 | GFP_KERNEL); |
597 | if (!match) |
598 | return -ENOMEM; |
599 | |
600 | match->regulator = regulator; |
601 | match->nb = nb; |
602 | |
603 | ret = regulator_register_notifier(regulator, nb); |
604 | if (ret < 0) { |
605 | devres_free(res: match); |
606 | return ret; |
607 | } |
608 | |
609 | devres_add(dev: regulator->dev, res: match); |
610 | |
611 | return 0; |
612 | } |
613 | EXPORT_SYMBOL_GPL(devm_regulator_register_notifier); |
614 | |
615 | /** |
616 | * devm_regulator_unregister_notifier - Resource managed |
617 | * regulator_unregister_notifier() |
618 | * |
619 | * @regulator: regulator source |
620 | * @nb: notifier block |
621 | * |
622 | * Unregister a notifier registered with devm_regulator_register_notifier(). |
623 | * Normally this function will not need to be called and the resource |
624 | * management code will ensure that the resource is freed. |
625 | */ |
626 | void devm_regulator_unregister_notifier(struct regulator *regulator, |
627 | struct notifier_block *nb) |
628 | { |
629 | struct regulator_notifier_match match; |
630 | int rc; |
631 | |
632 | match.regulator = regulator; |
633 | match.nb = nb; |
634 | |
635 | rc = devres_release(dev: regulator->dev, release: devm_regulator_destroy_notifier, |
636 | match: devm_regulator_match_notifier, match_data: &match); |
637 | if (rc != 0) |
638 | WARN_ON(rc); |
639 | } |
640 | EXPORT_SYMBOL_GPL(devm_regulator_unregister_notifier); |
641 | |
642 | static void regulator_irq_helper_drop(void *res) |
643 | { |
644 | regulator_irq_helper_cancel(handle: &res); |
645 | } |
646 | |
647 | /** |
648 | * devm_regulator_irq_helper - resource managed registration of IRQ based |
649 | * regulator event/error notifier |
650 | * |
651 | * @dev: device to which lifetime the helper's lifetime is |
652 | * bound. |
653 | * @d: IRQ helper descriptor. |
654 | * @irq: IRQ used to inform events/errors to be notified. |
655 | * @irq_flags: Extra IRQ flags to be OR'ed with the default |
656 | * IRQF_ONESHOT when requesting the (threaded) irq. |
657 | * @common_errs: Errors which can be flagged by this IRQ for all rdevs. |
658 | * When IRQ is re-enabled these errors will be cleared |
659 | * from all associated regulators |
660 | * @per_rdev_errs: Optional error flag array describing errors specific |
661 | * for only some of the regulators. These errors will be |
662 | * or'ed with common errors. If this is given the array |
663 | * should contain rdev_amount flags. Can be set to NULL |
664 | * if there is no regulator specific error flags for this |
665 | * IRQ. |
666 | * @rdev: Array of pointers to regulators associated with this |
667 | * IRQ. |
668 | * @rdev_amount: Amount of regulators associated with this IRQ. |
669 | * |
670 | * Return: handle to irq_helper or an ERR_PTR() encoded error code. |
671 | */ |
672 | void *devm_regulator_irq_helper(struct device *dev, |
673 | const struct regulator_irq_desc *d, int irq, |
674 | int irq_flags, int common_errs, |
675 | int *per_rdev_errs, |
676 | struct regulator_dev **rdev, int rdev_amount) |
677 | { |
678 | void *ptr; |
679 | int ret; |
680 | |
681 | ptr = regulator_irq_helper(dev, d, irq, irq_flags, common_errs, |
682 | per_rdev_errs, rdev, rdev_amount); |
683 | if (IS_ERR(ptr)) |
684 | return ptr; |
685 | |
686 | ret = devm_add_action_or_reset(dev, regulator_irq_helper_drop, ptr); |
687 | if (ret) |
688 | return ERR_PTR(error: ret); |
689 | |
690 | return ptr; |
691 | } |
692 | EXPORT_SYMBOL_GPL(devm_regulator_irq_helper); |
693 | |