18 #define pr_fmt(fmt) "PM: " fmt
24 #include <linux/pm.h>
26 #include <linux/pm-trace.h>
90 		return "(unknown PM event)";  in pm_verb()
111  * device_pm_lock - Lock the list of active devices used by the PM core.
119  * device_pm_unlock - Unlock the list of active devices used by the PM core.
127  * device_pm_add - Add a device to the PM core's list of active devices.
132 	/* Skip PM setup/initialization. */  in device_pm_add()
149  * device_pm_remove - Remove a device from the PM core's list of active devices.
170  * device_pm_move_before - Move device in the PM core's list of active devices.
184  * device_pm_move_after - Move device in the PM core's list of active devices.
198  * device_pm_move_last - Move device to end of the PM core's list of devices.
233  * dpm_wait - Wait for a PM operation to complete.
342  * pm_op - Return the PM operation appropriate for given PM event.
343  * @ops: PM operations to choose from.
344  * @state: PM transition of the system being carried out.
373  * pm_late_early_op - Return the PM operation appropriate for given PM event.
374  * @ops: PM operations to choose from.
375  * @state: PM transition of the system being carried out.
377  * Runtime PM is disabled for @dev while this function is being executed.
407  * pm_noirq_op - Return the PM operation appropriate for given PM event.
408  * @ops: PM operations to choose from.
409  * @state: PM transition of the system being carried out.
508  * @t: The timer that PM watchdog depends on.
525  * dpm_watchdog_set - Enable pm watchdog for given device.
585  * @state: PM transition of the system being carried out.
614 	 * this device later, it needs to appear as "suspended" to PM-runtime,  in device_resume_noirq()
617 	 * Otherwise, the device is going to be resumed, so set its PM-runtime  in device_resume_noirq()
629 	} else if (dev->type && dev->type->pm) {  in device_resume_noirq()
631 		callback = pm_noirq_op(dev->type->pm, state);  in device_resume_noirq()
632 	} else if (dev->class && dev->class->pm) {  in device_resume_noirq()
634 		callback = pm_noirq_op(dev->class->pm, state);  in device_resume_noirq()
635 	} else if (dev->bus && dev->bus->pm) {  in device_resume_noirq()
637 		callback = pm_noirq_op(dev->bus->pm, state);  in device_resume_noirq()
645 	if (dev->driver && dev->driver->pm) {  in device_resume_noirq()
647 		callback = pm_noirq_op(dev->driver->pm, state);  in device_resume_noirq()
739  * @state: PM transition of the system being carried out.
757  * @state: PM transition of the system being carried out.
760  * Runtime PM is disabled for @dev while this function is being executed.
783 	} else if (dev->type && dev->type->pm) {  in device_resume_early()
785 		callback = pm_late_early_op(dev->type->pm, state);  in device_resume_early()
786 	} else if (dev->class && dev->class->pm) {  in device_resume_early()
788 		callback = pm_late_early_op(dev->class->pm, state);  in device_resume_early()
789 	} else if (dev->bus && dev->bus->pm) {  in device_resume_early()
791 		callback = pm_late_early_op(dev->bus->pm, state);  in device_resume_early()
799 	if (dev->driver && dev->driver->pm) {  in device_resume_early()
801 		callback = pm_late_early_op(dev->driver->pm, state);  in device_resume_early()
832  * @state: PM transition of the system being carried out.
879  * @state: PM transition of the system being carried out.
891  * @state: PM transition of the system being carried out.
934 	if (dev->type && dev->type->pm) {  in device_resume()
936 		callback = pm_op(dev->type->pm, state);  in device_resume()
940 	if (dev->class && dev->class->pm) {  in device_resume()
942 		callback = pm_op(dev->class->pm, state);  in device_resume()
947 		if (dev->bus->pm) {  in device_resume()
949 			callback = pm_op(dev->bus->pm, state);  in device_resume()
958 	if (!callback && dev->driver && dev->driver->pm) {  in device_resume()
960 		callback = pm_op(dev->driver->pm, state);  in device_resume()
992  * @state: PM transition of the system being carried out.
1044  * device_complete - Complete a PM transition for given device.
1046  * @state: PM transition of the system being carried out.
1061 	} else if (dev->type && dev->type->pm) {  in device_complete()
1063 		callback = dev->type->pm->complete;  in device_complete()
1064 	} else if (dev->class && dev->class->pm) {  in device_complete()
1066 		callback = dev->class->pm->complete;  in device_complete()
1067 	} else if (dev->bus && dev->bus->pm) {  in device_complete()
1069 		callback = dev->bus->pm->complete;  in device_complete()
1072 	if (!callback && dev->driver && dev->driver->pm) {  in device_complete()
1074 		callback = dev->driver->pm->complete;  in device_complete()
1088  * dpm_complete - Complete a PM transition for all non-sysdev devices.
1089  * @state: PM transition of the system being carried out.
1091  * Execute the ->complete() callbacks for all devices whose PM status is not
1128  * @state: PM transition of the system being carried out.
1130  * Execute "resume" callbacks for all devices and complete the PM transition of
1145  * @sleep_state: PM message representing a sleep state.
1147  * Return a PM message representing the resume event corresponding to given
1183  * @state: PM transition of the system being carried out.
1209 	} else if (dev->type && dev->type->pm) {  in __device_suspend_noirq()
1211 		callback = pm_noirq_op(dev->type->pm, state);  in __device_suspend_noirq()
1212 	} else if (dev->class && dev->class->pm) {  in __device_suspend_noirq()
1214 		callback = pm_noirq_op(dev->class->pm, state);  in __device_suspend_noirq()
1215 	} else if (dev->bus && dev->bus->pm) {  in __device_suspend_noirq()
1217 		callback = pm_noirq_op(dev->bus->pm, state);  in __device_suspend_noirq()
1225 	if (dev->driver && dev->driver->pm) {  in __device_suspend_noirq()
1227 		callback = pm_noirq_op(dev->driver->pm, state);  in __device_suspend_noirq()
1242 	 * system suspend (as indicated by their PM-runtime usage counters)  in __device_suspend_noirq()
1330  * @state: PM transition of the system being carried out.
1369  * @state: PM transition of the system being carried out.
1372  * Runtime PM is disabled for @dev while this function is being executed.
1401 	} else if (dev->type && dev->type->pm) {  in __device_suspend_late()
1403 		callback = pm_late_early_op(dev->type->pm, state);  in __device_suspend_late()
1404 	} else if (dev->class && dev->class->pm) {  in __device_suspend_late()
1406 		callback = pm_late_early_op(dev->class->pm, state);  in __device_suspend_late()
1407 	} else if (dev->bus && dev->bus->pm) {  in __device_suspend_late()
1409 		callback = pm_late_early_op(dev->bus->pm, state);  in __device_suspend_late()
1417 	if (dev->driver && dev->driver->pm) {  in __device_suspend_late()
1419 		callback = pm_late_early_op(dev->driver->pm, state);  in __device_suspend_late()
1462  * @state: PM transition of the system being carried out.
1513  * @state: PM transition of the system being carried out.
1537  * @state: PM transition of the system being carried out.
1585  * @state: PM transition of the system being carried out.
1606 	 * Wait for possible runtime PM transitions of the device in progress  in __device_suspend()
1612 	 * of the device, they must disable runtime PM for it or otherwise  in __device_suspend()
1656 	if (dev->type && dev->type->pm) {  in __device_suspend()
1658 		callback = pm_op(dev->type->pm, state);  in __device_suspend()
1662 	if (dev->class && dev->class->pm) {  in __device_suspend()
1664 		callback = pm_op(dev->class->pm, state);  in __device_suspend()
1669 		if (dev->bus->pm) {  in __device_suspend()
1671 			callback = pm_op(dev->bus->pm, state);  in __device_suspend()
1681 	if (!callback && dev->driver && dev->driver->pm) {  in __device_suspend()
1683 		callback = pm_op(dev->driver->pm, state);  in __device_suspend()
1734  * @state: PM transition of the system being carried out.
1787  * @state: PM transition of the system being carried out.
1817 	else if (dev->type && dev->type->pm)  in device_prepare()
1818 		callback = dev->type->pm->prepare;  in device_prepare()
1819 	else if (dev->class && dev->class->pm)  in device_prepare()
1820 		callback = dev->class->pm->prepare;  in device_prepare()
1821 	else if (dev->bus && dev->bus->pm)  in device_prepare()
1822 		callback = dev->bus->pm->prepare;  in device_prepare()
1824 	if (!callback && dev->driver && dev->driver->pm)  in device_prepare()
1825 		callback = dev->driver->pm->prepare;  in device_prepare()
1854  * dpm_prepare - Prepare all non-sysdev devices for a system PM transition.
1855  * @state: PM transition of the system being carried out.
1914  * dpm_suspend_start - Prepare devices for PM transition and suspend them.
1915  * @state: PM transition of the system being carried out.
1917  * Prepare all non-sysdev devices for system PM transition and execute "suspend"
1996 		(!dev->bus || (pm_ops_is_empty(dev->bus->pm) &&  in device_pm_check_callbacks()
1998 		(!dev->class || pm_ops_is_empty(dev->class->pm)) &&  in device_pm_check_callbacks()
1999 		(!dev->type || pm_ops_is_empty(dev->type->pm)) &&  in device_pm_check_callbacks()
2001 		(!dev->driver || (pm_ops_is_empty(dev->driver->pm) &&  in device_pm_check_callbacks()