1 /* SPDX-License-Identifier: GPL-2.0-only */
3  * pm_runtime.h - Device run-time power management helper functions.
78 extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
90 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
102  * pm_suspend_ignore_children - Set runtime PM behavior regarding children.
112 	dev->power.ignore_children = enable;  in pm_suspend_ignore_children()
116  * pm_runtime_get_noresume - Bump up runtime PM usage counter of a device.
121 	atomic_inc(&dev->power.usage_count);  in pm_runtime_get_noresume()
125  * pm_runtime_put_noidle - Drop runtime PM usage counter of a device.
132 	atomic_add_unless(&dev->power.usage_count, -1, 0);  in pm_runtime_put_noidle()
136  * pm_runtime_suspended - Check whether or not a device is runtime-suspended.
149 	return dev->power.runtime_status == RPM_SUSPENDED  in pm_runtime_suspended()
150 		&& !dev->power.disable_depth;  in pm_runtime_suspended()
154  * pm_runtime_active - Check whether or not a device is runtime-active.
167 	return dev->power.runtime_status == RPM_ACTIVE  in pm_runtime_active()
168 		|| dev->power.disable_depth;  in pm_runtime_active()
172  * pm_runtime_status_suspended - Check if runtime PM status is "suspended".
184 	return dev->power.runtime_status == RPM_SUSPENDED;  in pm_runtime_status_suspended()
188  * pm_runtime_enabled - Check if runtime PM is enabled.
199 	return !dev->power.disable_depth;  in pm_runtime_enabled()
203  * pm_runtime_blocked - Check if runtime PM enabling is blocked.
210 	return dev->power.last_status == RPM_BLOCKED;  in pm_runtime_blocked()
214  * pm_runtime_has_no_callbacks - Check if runtime PM callbacks may be present.
222 	return dev->power.no_callbacks;  in pm_runtime_has_no_callbacks()
226  * pm_runtime_mark_last_busy - Update the last access time of a device.
229  * Update the last access time of @dev used by the runtime PM autosuspend
234 	WRITE_ONCE(dev->power.last_busy, ktime_get_mono_fast_ns());  in pm_runtime_mark_last_busy()
238  * pm_runtime_is_irq_safe - Check if runtime PM can work in interrupt context.
241  * Return %true if @dev has been marked as an "IRQ-safe" device (with respect
247 	return dev->power.irq_safe;  in pm_runtime_is_irq_safe()
264 	return -ENOSYS;  in __pm_runtime_idle()
268 	return -ENOSYS;  in __pm_runtime_suspend()
274 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)  in pm_schedule_suspend()  argument
276 	return -ENOSYS;  in pm_schedule_suspend()
280 	return -EINVAL;  in pm_runtime_get_if_in_use()
284 	return -EINVAL;  in pm_runtime_get_if_active()
316 						int delay) {}  in pm_runtime_set_autosuspend_delay()  argument
330  * pm_runtime_idle - Conditionally set up autosuspend of a device or suspend it.
334  * set up autosuspend of @dev or suspend it (depending on whether or not
335  * autosuspend has been enabled for it).
343  * pm_runtime_suspend - Suspend a device synchronously.
352  * pm_runtime_autosuspend - Set up autosuspend of a device or suspend it.
355  * Set up autosuspend of @dev or suspend it (depending on whether or not
356  * autosuspend is enabled for it) without engaging its "idle check" callback.
364  * pm_runtime_resume - Resume a device synchronously.
373  * pm_request_idle - Queue up "idle check" execution for a device.
385  * pm_request_resume - Queue up runtime-resume of a device.
394  * pm_request_autosuspend - Queue up autosuspend of a device.
406  * pm_runtime_get - Bump up usage counter and queue up resume of a device.
410  * carry out runtime-resume of it.
418  * pm_runtime_get_sync - Bump up usage counter of a device and resume it.
421  * Bump up the runtime PM usage counter of @dev and carry out runtime-resume of
437  * pm_runtime_resume_and_get - Bump up usage counter of a device and resume it.
458  * pm_runtime_put - Drop device usage counter and queue up "idle check" if 0.
470  * __pm_runtime_put_autosuspend - Drop device usage counter and queue autosuspend if 0.
482  * pm_runtime_put_autosuspend - Drop device usage counter and queue autosuspend if 0.
495  * pm_runtime_put_sync - Drop device usage counter and run "idle check" if 0.
500  * return value, set up autosuspend of @dev or suspend it (depending on whether
501  * or not autosuspend has been enabled for it).
513  * pm_runtime_put_sync_suspend - Drop device usage counter and suspend if 0.
517  * equal to 0, carry out runtime-suspend of @dev synchronously.
529  * pm_runtime_put_sync_autosuspend - Drop device usage counter and autosuspend if 0.
533  * equal to 0, set up autosuspend of @dev or suspend it synchronously (depending
534  * on whether or not autosuspend has been enabled for it).
546  * pm_runtime_set_active - Set runtime PM status to "active".
560  * pm_runtime_set_suspended - Set runtime PM status to "suspended".
574  * pm_runtime_disable - Disable runtime PM for a device.
596  * pm_runtime_use_autosuspend - Allow autosuspend to be used for a device.
599  * Allow the runtime PM autosuspend mechanism to be used for @dev whenever
600  * requested (or "autosuspend" will be handled as direct runtime-suspend for
613  * pm_runtime_dont_use_autosuspend - Prevent autosuspend from being used.
616  * Prevent the runtime PM autosuspend mechanism from being used for @dev which
617  * means that "autosuspend" will be handled as direct runtime-suspend for it