Line data Source code
1 : /* SPDX-License-Identifier: GPL-2.0-only */
2 : /*
3 : * pm_runtime.h - Device run-time power management helper functions.
4 : *
5 : * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
6 : */
7 :
8 : #ifndef _LINUX_PM_RUNTIME_H
9 : #define _LINUX_PM_RUNTIME_H
10 :
11 : #include <linux/device.h>
12 : #include <linux/notifier.h>
13 : #include <linux/pm.h>
14 :
15 : #include <linux/jiffies.h>
16 :
17 : /* Runtime PM flag argument bits */
18 : #define RPM_ASYNC 0x01 /* Request is asynchronous */
19 : #define RPM_NOWAIT 0x02 /* Don't wait for concurrent
20 : state change */
21 : #define RPM_GET_PUT 0x04 /* Increment/decrement the
22 : usage_count */
23 : #define RPM_AUTO 0x08 /* Use autosuspend_delay */
24 :
25 : /*
26 : * Use this for defining a set of PM operations to be used in all situations
27 : * (system suspend, hibernation or runtime PM).
28 : *
29 : * Note that the behaviour differs from the deprecated UNIVERSAL_DEV_PM_OPS()
30 : * macro, which uses the provided callbacks for both runtime PM and system
31 : * sleep, while DEFINE_RUNTIME_DEV_PM_OPS() uses pm_runtime_force_suspend()
32 : * and pm_runtime_force_resume() for its system sleep callbacks.
33 : *
34 : * If the underlying dev_pm_ops struct symbol has to be exported, use
35 : * EXPORT_RUNTIME_DEV_PM_OPS() or EXPORT_GPL_RUNTIME_DEV_PM_OPS() instead.
36 : */
37 : #define DEFINE_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
38 : _DEFINE_DEV_PM_OPS(name, pm_runtime_force_suspend, \
39 : pm_runtime_force_resume, suspend_fn, \
40 : resume_fn, idle_fn)
41 :
42 : #define EXPORT_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
43 : EXPORT_DEV_PM_OPS(name) = { \
44 : RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
45 : }
46 : #define EXPORT_GPL_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
47 : EXPORT_GPL_DEV_PM_OPS(name) = { \
48 : RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
49 : }
50 : #define EXPORT_NS_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn, ns) \
51 : EXPORT_NS_DEV_PM_OPS(name, ns) = { \
52 : RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
53 : }
54 : #define EXPORT_NS_GPL_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn, ns) \
55 : EXPORT_NS_GPL_DEV_PM_OPS(name, ns) = { \
56 : RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
57 : }
58 :
59 : #ifdef CONFIG_PM
60 : extern struct workqueue_struct *pm_wq;
61 :
62 : static inline bool queue_pm_work(struct work_struct *work)
63 : {
64 : return queue_work(pm_wq, work);
65 : }
66 :
67 : extern int pm_generic_runtime_suspend(struct device *dev);
68 : extern int pm_generic_runtime_resume(struct device *dev);
69 : extern int pm_runtime_force_suspend(struct device *dev);
70 : extern int pm_runtime_force_resume(struct device *dev);
71 :
72 : extern int __pm_runtime_idle(struct device *dev, int rpmflags);
73 : extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
74 : extern int __pm_runtime_resume(struct device *dev, int rpmflags);
75 : extern int pm_runtime_get_if_active(struct device *dev, bool ign_usage_count);
76 : extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
77 : extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
78 : extern int pm_runtime_barrier(struct device *dev);
79 : extern void pm_runtime_enable(struct device *dev);
80 : extern void __pm_runtime_disable(struct device *dev, bool check_resume);
81 : extern void pm_runtime_allow(struct device *dev);
82 : extern void pm_runtime_forbid(struct device *dev);
83 : extern void pm_runtime_no_callbacks(struct device *dev);
84 : extern void pm_runtime_irq_safe(struct device *dev);
85 : extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
86 : extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
87 : extern u64 pm_runtime_autosuspend_expiration(struct device *dev);
88 : extern void pm_runtime_update_max_time_suspended(struct device *dev,
89 : s64 delta_ns);
90 : extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
91 : extern void pm_runtime_get_suppliers(struct device *dev);
92 : extern void pm_runtime_put_suppliers(struct device *dev);
93 : extern void pm_runtime_new_link(struct device *dev);
94 : extern void pm_runtime_drop_link(struct device_link *link);
95 : extern void pm_runtime_release_supplier(struct device_link *link);
96 :
97 : extern int devm_pm_runtime_enable(struct device *dev);
98 :
99 : /**
100 : * pm_runtime_get_if_in_use - Conditionally bump up runtime PM usage counter.
101 : * @dev: Target device.
102 : *
103 : * Increment the runtime PM usage counter of @dev if its runtime PM status is
104 : * %RPM_ACTIVE and its runtime PM usage counter is greater than 0.
105 : */
106 : static inline int pm_runtime_get_if_in_use(struct device *dev)
107 : {
108 : return pm_runtime_get_if_active(dev, false);
109 : }
110 :
111 : /**
112 : * pm_suspend_ignore_children - Set runtime PM behavior regarding children.
113 : * @dev: Target device.
114 : * @enable: Whether or not to ignore possible dependencies on children.
115 : *
116 : * The dependencies of @dev on its children will not be taken into account by
117 : * the runtime PM framework going forward if @enable is %true, or they will
118 : * be taken into account otherwise.
119 : */
120 : static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
121 : {
122 580 : dev->power.ignore_children = enable;
123 : }
124 :
125 : /**
126 : * pm_runtime_get_noresume - Bump up runtime PM usage counter of a device.
127 : * @dev: Target device.
128 : */
129 : static inline void pm_runtime_get_noresume(struct device *dev)
130 : {
131 2188 : atomic_inc(&dev->power.usage_count);
132 : }
133 :
134 : /**
135 : * pm_runtime_put_noidle - Drop runtime PM usage counter of a device.
136 : * @dev: Target device.
137 : *
138 : * Decrement the runtime PM usage counter of @dev unless it is 0 already.
139 : */
140 : static inline void pm_runtime_put_noidle(struct device *dev)
141 : {
142 1116 : atomic_add_unless(&dev->power.usage_count, -1, 0);
143 : }
144 :
145 : /**
146 : * pm_runtime_suspended - Check whether or not a device is runtime-suspended.
147 : * @dev: Target device.
148 : *
149 : * Return %true if runtime PM is enabled for @dev and its runtime PM status is
150 : * %RPM_SUSPENDED, or %false otherwise.
151 : *
152 : * Note that the return value of this function can only be trusted if it is
153 : * called under the runtime PM lock of @dev or under conditions in which
154 : * runtime PM cannot be either disabled or enabled for @dev and its runtime PM
155 : * status cannot change.
156 : */
157 : static inline bool pm_runtime_suspended(struct device *dev)
158 : {
159 0 : return dev->power.runtime_status == RPM_SUSPENDED
160 0 : && !dev->power.disable_depth;
161 : }
162 :
163 : /**
164 : * pm_runtime_active - Check whether or not a device is runtime-active.
165 : * @dev: Target device.
166 : *
167 : * Return %true if runtime PM is disabled for @dev or its runtime PM status is
168 : * %RPM_ACTIVE, or %false otherwise.
169 : *
170 : * Note that the return value of this function can only be trusted if it is
171 : * called under the runtime PM lock of @dev or under conditions in which
172 : * runtime PM cannot be either disabled or enabled for @dev and its runtime PM
173 : * status cannot change.
174 : */
175 : static inline bool pm_runtime_active(struct device *dev)
176 : {
177 : return dev->power.runtime_status == RPM_ACTIVE
178 : || dev->power.disable_depth;
179 : }
180 :
181 : /**
182 : * pm_runtime_status_suspended - Check if runtime PM status is "suspended".
183 : * @dev: Target device.
184 : *
185 : * Return %true if the runtime PM status of @dev is %RPM_SUSPENDED, or %false
186 : * otherwise, regardless of whether or not runtime PM has been enabled for @dev.
187 : *
188 : * Note that the return value of this function can only be trusted if it is
189 : * called under the runtime PM lock of @dev or under conditions in which the
190 : * runtime PM status of @dev cannot change.
191 : */
192 : static inline bool pm_runtime_status_suspended(struct device *dev)
193 : {
194 : return dev->power.runtime_status == RPM_SUSPENDED;
195 : }
196 :
197 : /**
198 : * pm_runtime_enabled - Check if runtime PM is enabled.
199 : * @dev: Target device.
200 : *
201 : * Return %true if runtime PM is enabled for @dev or %false otherwise.
202 : *
203 : * Note that the return value of this function can only be trusted if it is
204 : * called under the runtime PM lock of @dev or under conditions in which
205 : * runtime PM cannot be either disabled or enabled for @dev.
206 : */
207 : static inline bool pm_runtime_enabled(struct device *dev)
208 : {
209 45 : return !dev->power.disable_depth;
210 : }
211 :
212 : /**
213 : * pm_runtime_has_no_callbacks - Check if runtime PM callbacks may be present.
214 : * @dev: Target device.
215 : *
216 : * Return %true if @dev is a special device without runtime PM callbacks or
217 : * %false otherwise.
218 : */
219 : static inline bool pm_runtime_has_no_callbacks(struct device *dev)
220 : {
221 559 : return dev->power.no_callbacks;
222 : }
223 :
224 : /**
225 : * pm_runtime_mark_last_busy - Update the last access time of a device.
226 : * @dev: Target device.
227 : *
228 : * Update the last access time of @dev used by the runtime PM autosuspend
229 : * mechanism to the current time as returned by ktime_get_mono_fast_ns().
230 : */
231 : static inline void pm_runtime_mark_last_busy(struct device *dev)
232 : {
233 0 : WRITE_ONCE(dev->power.last_busy, ktime_get_mono_fast_ns());
234 : }
235 :
236 : /**
237 : * pm_runtime_is_irq_safe - Check if runtime PM can work in interrupt context.
238 : * @dev: Target device.
239 : *
240 : * Return %true if @dev has been marked as an "IRQ-safe" device (with respect
241 : * to runtime PM), in which case its runtime PM callabcks can be expected to
242 : * work correctly when invoked from interrupt handlers.
243 : */
244 : static inline bool pm_runtime_is_irq_safe(struct device *dev)
245 : {
246 : return dev->power.irq_safe;
247 : }
248 :
249 : extern u64 pm_runtime_suspended_time(struct device *dev);
250 :
251 : #else /* !CONFIG_PM */
252 :
253 : static inline bool queue_pm_work(struct work_struct *work) { return false; }
254 :
255 : static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
256 : static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
257 : static inline int pm_runtime_force_suspend(struct device *dev) { return 0; }
258 : static inline int pm_runtime_force_resume(struct device *dev) { return 0; }
259 :
260 : static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
261 : {
262 : return -ENOSYS;
263 : }
264 : static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
265 : {
266 : return -ENOSYS;
267 : }
268 : static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
269 : {
270 : return 1;
271 : }
272 : static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
273 : {
274 : return -ENOSYS;
275 : }
276 : static inline int pm_runtime_get_if_in_use(struct device *dev)
277 : {
278 : return -EINVAL;
279 : }
280 : static inline int pm_runtime_get_if_active(struct device *dev,
281 : bool ign_usage_count)
282 : {
283 : return -EINVAL;
284 : }
285 : static inline int __pm_runtime_set_status(struct device *dev,
286 : unsigned int status) { return 0; }
287 : static inline int pm_runtime_barrier(struct device *dev) { return 0; }
288 : static inline void pm_runtime_enable(struct device *dev) {}
289 : static inline void __pm_runtime_disable(struct device *dev, bool c) {}
290 : static inline void pm_runtime_allow(struct device *dev) {}
291 : static inline void pm_runtime_forbid(struct device *dev) {}
292 :
293 : static inline int devm_pm_runtime_enable(struct device *dev) { return 0; }
294 :
295 : static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {}
296 : static inline void pm_runtime_get_noresume(struct device *dev) {}
297 : static inline void pm_runtime_put_noidle(struct device *dev) {}
298 : static inline bool pm_runtime_suspended(struct device *dev) { return false; }
299 : static inline bool pm_runtime_active(struct device *dev) { return true; }
300 : static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
301 : static inline bool pm_runtime_enabled(struct device *dev) { return false; }
302 :
303 : static inline void pm_runtime_no_callbacks(struct device *dev) {}
304 : static inline void pm_runtime_irq_safe(struct device *dev) {}
305 : static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; }
306 :
307 : static inline bool pm_runtime_has_no_callbacks(struct device *dev) { return false; }
308 : static inline void pm_runtime_mark_last_busy(struct device *dev) {}
309 : static inline void __pm_runtime_use_autosuspend(struct device *dev,
310 : bool use) {}
311 : static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
312 : int delay) {}
313 : static inline u64 pm_runtime_autosuspend_expiration(
314 : struct device *dev) { return 0; }
315 : static inline void pm_runtime_set_memalloc_noio(struct device *dev,
316 : bool enable){}
317 : static inline void pm_runtime_get_suppliers(struct device *dev) {}
318 : static inline void pm_runtime_put_suppliers(struct device *dev) {}
319 : static inline void pm_runtime_new_link(struct device *dev) {}
320 : static inline void pm_runtime_drop_link(struct device_link *link) {}
321 : static inline void pm_runtime_release_supplier(struct device_link *link) {}
322 :
323 : #endif /* !CONFIG_PM */
324 :
325 : /**
326 : * pm_runtime_idle - Conditionally set up autosuspend of a device or suspend it.
327 : * @dev: Target device.
328 : *
329 : * Invoke the "idle check" callback of @dev and, depending on its return value,
330 : * set up autosuspend of @dev or suspend it (depending on whether or not
331 : * autosuspend has been enabled for it).
332 : */
333 : static inline int pm_runtime_idle(struct device *dev)
334 : {
335 : return __pm_runtime_idle(dev, 0);
336 : }
337 :
338 : /**
339 : * pm_runtime_suspend - Suspend a device synchronously.
340 : * @dev: Target device.
341 : */
342 : static inline int pm_runtime_suspend(struct device *dev)
343 : {
344 : return __pm_runtime_suspend(dev, 0);
345 : }
346 :
347 : /**
348 : * pm_runtime_autosuspend - Set up autosuspend of a device or suspend it.
349 : * @dev: Target device.
350 : *
351 : * Set up autosuspend of @dev or suspend it (depending on whether or not
352 : * autosuspend is enabled for it) without engaging its "idle check" callback.
353 : */
354 : static inline int pm_runtime_autosuspend(struct device *dev)
355 : {
356 : return __pm_runtime_suspend(dev, RPM_AUTO);
357 : }
358 :
359 : /**
360 : * pm_runtime_resume - Resume a device synchronously.
361 : * @dev: Target device.
362 : */
363 : static inline int pm_runtime_resume(struct device *dev)
364 : {
365 0 : return __pm_runtime_resume(dev, 0);
366 : }
367 :
368 : /**
369 : * pm_request_idle - Queue up "idle check" execution for a device.
370 : * @dev: Target device.
371 : *
372 : * Queue up a work item to run an equivalent of pm_runtime_idle() for @dev
373 : * asynchronously.
374 : */
375 : static inline int pm_request_idle(struct device *dev)
376 : {
377 48 : return __pm_runtime_idle(dev, RPM_ASYNC);
378 : }
379 :
380 : /**
381 : * pm_request_resume - Queue up runtime-resume of a device.
382 : * @dev: Target device.
383 : */
384 : static inline int pm_request_resume(struct device *dev)
385 : {
386 0 : return __pm_runtime_resume(dev, RPM_ASYNC);
387 : }
388 :
389 : /**
390 : * pm_request_autosuspend - Queue up autosuspend of a device.
391 : * @dev: Target device.
392 : *
393 : * Queue up a work item to run an equivalent pm_runtime_autosuspend() for @dev
394 : * asynchronously.
395 : */
396 : static inline int pm_request_autosuspend(struct device *dev)
397 : {
398 0 : return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
399 : }
400 :
401 : /**
402 : * pm_runtime_get - Bump up usage counter and queue up resume of a device.
403 : * @dev: Target device.
404 : *
405 : * Bump up the runtime PM usage counter of @dev and queue up a work item to
406 : * carry out runtime-resume of it.
407 : */
408 : static inline int pm_runtime_get(struct device *dev)
409 : {
410 : return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
411 : }
412 :
413 : /**
414 : * pm_runtime_get_sync - Bump up usage counter of a device and resume it.
415 : * @dev: Target device.
416 : *
417 : * Bump up the runtime PM usage counter of @dev and carry out runtime-resume of
418 : * it synchronously.
419 : *
420 : * The possible return values of this function are the same as for
421 : * pm_runtime_resume() and the runtime PM usage counter of @dev remains
422 : * incremented in all cases, even if it returns an error code.
423 : * Consider using pm_runtime_resume_and_get() instead of it, especially
424 : * if its return value is checked by the caller, as this is likely to result
425 : * in cleaner code.
426 : */
427 : static inline int pm_runtime_get_sync(struct device *dev)
428 : {
429 66 : return __pm_runtime_resume(dev, RPM_GET_PUT);
430 : }
431 :
432 : /**
433 : * pm_runtime_resume_and_get - Bump up usage counter of a device and resume it.
434 : * @dev: Target device.
435 : *
436 : * Resume @dev synchronously and if that is successful, increment its runtime
437 : * PM usage counter. Return 0 if the runtime PM usage counter of @dev has been
438 : * incremented or a negative error code otherwise.
439 : */
440 0 : static inline int pm_runtime_resume_and_get(struct device *dev)
441 : {
442 : int ret;
443 :
444 0 : ret = __pm_runtime_resume(dev, RPM_GET_PUT);
445 0 : if (ret < 0) {
446 : pm_runtime_put_noidle(dev);
447 : return ret;
448 : }
449 :
450 : return 0;
451 : }
452 :
453 : /**
454 : * pm_runtime_put - Drop device usage counter and queue up "idle check" if 0.
455 : * @dev: Target device.
456 : *
457 : * Decrement the runtime PM usage counter of @dev and if it turns out to be
458 : * equal to 0, queue up a work item for @dev like in pm_request_idle().
459 : */
460 0 : static inline int pm_runtime_put(struct device *dev)
461 : {
462 44 : return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
463 : }
464 :
465 : /**
466 : * pm_runtime_put_autosuspend - Drop device usage counter and queue autosuspend if 0.
467 : * @dev: Target device.
468 : *
469 : * Decrement the runtime PM usage counter of @dev and if it turns out to be
470 : * equal to 0, queue up a work item for @dev like in pm_request_autosuspend().
471 : */
472 : static inline int pm_runtime_put_autosuspend(struct device *dev)
473 : {
474 : return __pm_runtime_suspend(dev,
475 : RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
476 : }
477 :
478 : /**
479 : * pm_runtime_put_sync - Drop device usage counter and run "idle check" if 0.
480 : * @dev: Target device.
481 : *
482 : * Decrement the runtime PM usage counter of @dev and if it turns out to be
483 : * equal to 0, invoke the "idle check" callback of @dev and, depending on its
484 : * return value, set up autosuspend of @dev or suspend it (depending on whether
485 : * or not autosuspend has been enabled for it).
486 : *
487 : * The possible return values of this function are the same as for
488 : * pm_runtime_idle() and the runtime PM usage counter of @dev remains
489 : * decremented in all cases, even if it returns an error code.
490 : */
491 : static inline int pm_runtime_put_sync(struct device *dev)
492 : {
493 22 : return __pm_runtime_idle(dev, RPM_GET_PUT);
494 : }
495 :
496 : /**
497 : * pm_runtime_put_sync_suspend - Drop device usage counter and suspend if 0.
498 : * @dev: Target device.
499 : *
500 : * Decrement the runtime PM usage counter of @dev and if it turns out to be
501 : * equal to 0, carry out runtime-suspend of @dev synchronously.
502 : *
503 : * The possible return values of this function are the same as for
504 : * pm_runtime_suspend() and the runtime PM usage counter of @dev remains
505 : * decremented in all cases, even if it returns an error code.
506 : */
507 : static inline int pm_runtime_put_sync_suspend(struct device *dev)
508 : {
509 : return __pm_runtime_suspend(dev, RPM_GET_PUT);
510 : }
511 :
512 : /**
513 : * pm_runtime_put_sync_autosuspend - Drop device usage counter and autosuspend if 0.
514 : * @dev: Target device.
515 : *
516 : * Decrement the runtime PM usage counter of @dev and if it turns out to be
517 : * equal to 0, set up autosuspend of @dev or suspend it synchronously (depending
518 : * on whether or not autosuspend has been enabled for it).
519 : *
520 : * The possible return values of this function are the same as for
521 : * pm_runtime_autosuspend() and the runtime PM usage counter of @dev remains
522 : * decremented in all cases, even if it returns an error code.
523 : */
524 : static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
525 : {
526 : return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
527 : }
528 :
529 : /**
530 : * pm_runtime_set_active - Set runtime PM status to "active".
531 : * @dev: Target device.
532 : *
533 : * Set the runtime PM status of @dev to %RPM_ACTIVE and ensure that dependencies
534 : * of it will be taken into account.
535 : *
536 : * It is not valid to call this function for devices with runtime PM enabled.
537 : */
538 : static inline int pm_runtime_set_active(struct device *dev)
539 : {
540 0 : return __pm_runtime_set_status(dev, RPM_ACTIVE);
541 : }
542 :
543 : /**
544 : * pm_runtime_set_suspended - Set runtime PM status to "suspended".
545 : * @dev: Target device.
546 : *
547 : * Set the runtime PM status of @dev to %RPM_SUSPENDED and ensure that
548 : * dependencies of it will be taken into account.
549 : *
550 : * It is not valid to call this function for devices with runtime PM enabled.
551 : */
552 : static inline int pm_runtime_set_suspended(struct device *dev)
553 : {
554 0 : return __pm_runtime_set_status(dev, RPM_SUSPENDED);
555 : }
556 :
557 : /**
558 : * pm_runtime_disable - Disable runtime PM for a device.
559 : * @dev: Target device.
560 : *
561 : * Prevent the runtime PM framework from working with @dev (by incrementing its
562 : * "blocking" counter).
563 : *
564 : * For each invocation of this function for @dev there must be a matching
565 : * pm_runtime_enable() call in order for runtime PM to be enabled for it.
566 : */
567 : static inline void pm_runtime_disable(struct device *dev)
568 : {
569 0 : __pm_runtime_disable(dev, true);
570 : }
571 :
572 : /**
573 : * pm_runtime_use_autosuspend - Allow autosuspend to be used for a device.
574 : * @dev: Target device.
575 : *
576 : * Allow the runtime PM autosuspend mechanism to be used for @dev whenever
577 : * requested (or "autosuspend" will be handled as direct runtime-suspend for
578 : * it).
579 : *
580 : * NOTE: It's important to undo this with pm_runtime_dont_use_autosuspend()
581 : * at driver exit time unless your driver initially enabled pm_runtime
582 : * with devm_pm_runtime_enable() (which handles it for you).
583 : */
584 : static inline void pm_runtime_use_autosuspend(struct device *dev)
585 : {
586 0 : __pm_runtime_use_autosuspend(dev, true);
587 : }
588 :
589 : /**
590 : * pm_runtime_dont_use_autosuspend - Prevent autosuspend from being used.
591 : * @dev: Target device.
592 : *
593 : * Prevent the runtime PM autosuspend mechanism from being used for @dev which
594 : * means that "autosuspend" will be handled as direct runtime-suspend for it
595 : * going forward.
596 : */
597 : static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
598 : {
599 0 : __pm_runtime_use_autosuspend(dev, false);
600 : }
601 :
602 : #endif
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