67 void wakeup_source_prepare(struct wakeup_source *ws, const char *name)  in wakeup_source_prepare()  argument
69 	if (ws) {  in wakeup_source_prepare()
70 		memset(ws, 0, sizeof(*ws));  in wakeup_source_prepare()
71 		ws->name = name;  in wakeup_source_prepare()
82 	struct wakeup_source *ws;  in wakeup_source_create()  local
84 	ws = kmalloc(sizeof(*ws), GFP_KERNEL);  in wakeup_source_create()
85 	if (!ws)  in wakeup_source_create()
88 	wakeup_source_prepare(ws, name ? kstrdup(name, GFP_KERNEL) : NULL);  in wakeup_source_create()
89 	return ws;  in wakeup_source_create()
100 void wakeup_source_drop(struct wakeup_source *ws)  in wakeup_source_drop()  argument
102 	if (!ws)  in wakeup_source_drop()
105 	del_timer_sync(&ws->timer);  in wakeup_source_drop()
106 	__pm_relax(ws);  in wakeup_source_drop()
116 void wakeup_source_destroy(struct wakeup_source *ws)  in wakeup_source_destroy()  argument
118 	if (!ws)  in wakeup_source_destroy()
121 	wakeup_source_drop(ws);  in wakeup_source_destroy()
122 	kfree(ws->name);  in wakeup_source_destroy()
123 	kfree(ws);  in wakeup_source_destroy()
131 void wakeup_source_add(struct wakeup_source *ws)  in wakeup_source_add()  argument
135 	if (WARN_ON(!ws))  in wakeup_source_add()
138 	spin_lock_init(&ws->lock);  in wakeup_source_add()
139 	setup_timer(&ws->timer, pm_wakeup_timer_fn, (unsigned long)ws);  in wakeup_source_add()
140 	ws->active = false;  in wakeup_source_add()
141 	ws->last_time = ktime_get();  in wakeup_source_add()
144 	list_add_rcu(&ws->entry, &wakeup_sources);  in wakeup_source_add()
153 void wakeup_source_remove(struct wakeup_source *ws)  in wakeup_source_remove()  argument
157 	if (WARN_ON(!ws))  in wakeup_source_remove()
161 	list_del_rcu(&ws->entry);  in wakeup_source_remove()
173 	struct wakeup_source *ws;  in wakeup_source_register()  local
175 	ws = wakeup_source_create(name);  in wakeup_source_register()
176 	if (ws)  in wakeup_source_register()
177 		wakeup_source_add(ws);  in wakeup_source_register()
179 	return ws;  in wakeup_source_register()
187 void wakeup_source_unregister(struct wakeup_source *ws)  in wakeup_source_unregister()  argument
189 	if (ws) {  in wakeup_source_unregister()
190 		wakeup_source_remove(ws);  in wakeup_source_unregister()
191 		wakeup_source_destroy(ws);  in wakeup_source_unregister()
203 static int device_wakeup_attach(struct device *dev, struct wakeup_source *ws)  in device_wakeup_attach()  argument
210 	dev->power.wakeup = ws;  in device_wakeup_attach()
223 	struct wakeup_source *ws;  in device_wakeup_enable()  local
229 	ws = wakeup_source_register(dev_name(dev));  in device_wakeup_enable()
230 	if (!ws)  in device_wakeup_enable()
233 	ret = device_wakeup_attach(dev, ws);  in device_wakeup_enable()
235 		wakeup_source_unregister(ws);  in device_wakeup_enable()
249 	struct wakeup_source *ws;  in device_wakeup_detach()  local
252 	ws = dev->power.wakeup;  in device_wakeup_detach()
255 	return ws;  in device_wakeup_detach()
267 	struct wakeup_source *ws;  in device_wakeup_disable()  local
272 	ws = device_wakeup_detach(dev);  in device_wakeup_disable()
273 	if (ws)  in device_wakeup_disable()
274 		wakeup_source_unregister(ws);  in device_wakeup_disable()
390 static void wakeup_source_activate(struct wakeup_source *ws)  in wakeup_source_activate()  argument
400 	ws->active = true;  in wakeup_source_activate()
401 	ws->active_count++;  in wakeup_source_activate()
402 	ws->last_time = ktime_get();  in wakeup_source_activate()
403 	if (ws->autosleep_enabled)  in wakeup_source_activate()
404 		ws->start_prevent_time = ws->last_time;  in wakeup_source_activate()
409 	trace_wakeup_source_activate(ws->name, cec);  in wakeup_source_activate()
416 static void wakeup_source_report_event(struct wakeup_source *ws)  in wakeup_source_report_event()  argument
418 	ws->event_count++;  in wakeup_source_report_event()
421 		ws->wakeup_count++;  in wakeup_source_report_event()
423 	if (!ws->active)  in wakeup_source_report_event()
424 		wakeup_source_activate(ws);  in wakeup_source_report_event()
433 void __pm_stay_awake(struct wakeup_source *ws)  in __pm_stay_awake()  argument
437 	if (!ws)  in __pm_stay_awake()
440 	spin_lock_irqsave(&ws->lock, flags);  in __pm_stay_awake()
442 	wakeup_source_report_event(ws);  in __pm_stay_awake()
443 	del_timer(&ws->timer);  in __pm_stay_awake()
444 	ws->timer_expires = 0;  in __pm_stay_awake()
446 	spin_unlock_irqrestore(&ws->lock, flags);  in __pm_stay_awake()
475 static void update_prevent_sleep_time(struct wakeup_source *ws, ktime_t now)  in update_prevent_sleep_time()  argument
477 	ktime_t delta = ktime_sub(now, ws->start_prevent_time);  in update_prevent_sleep_time()
478 	ws->prevent_sleep_time = ktime_add(ws->prevent_sleep_time, delta);  in update_prevent_sleep_time()
481 static inline void update_prevent_sleep_time(struct wakeup_source *ws,  in update_prevent_sleep_time()  argument
493 static void wakeup_source_deactivate(struct wakeup_source *ws)  in wakeup_source_deactivate()  argument
499 	ws->relax_count++;  in wakeup_source_deactivate()
509 	if (ws->relax_count != ws->active_count) {  in wakeup_source_deactivate()
510 		ws->relax_count--;  in wakeup_source_deactivate()
514 	ws->active = false;  in wakeup_source_deactivate()
517 	duration = ktime_sub(now, ws->last_time);  in wakeup_source_deactivate()
518 	ws->total_time = ktime_add(ws->total_time, duration);  in wakeup_source_deactivate()
519 	if (ktime_to_ns(duration) > ktime_to_ns(ws->max_time))  in wakeup_source_deactivate()
520 		ws->max_time = duration;  in wakeup_source_deactivate()
522 	ws->last_time = now;  in wakeup_source_deactivate()
523 	del_timer(&ws->timer);  in wakeup_source_deactivate()
524 	ws->timer_expires = 0;  in wakeup_source_deactivate()
526 	if (ws->autosleep_enabled)  in wakeup_source_deactivate()
527 		update_prevent_sleep_time(ws, now);  in wakeup_source_deactivate()
534 	trace_wakeup_source_deactivate(ws->name, cec);  in wakeup_source_deactivate()
550 void __pm_relax(struct wakeup_source *ws)  in __pm_relax()  argument
554 	if (!ws)  in __pm_relax()
557 	spin_lock_irqsave(&ws->lock, flags);  in __pm_relax()
558 	if (ws->active)  in __pm_relax()
559 		wakeup_source_deactivate(ws);  in __pm_relax()
560 	spin_unlock_irqrestore(&ws->lock, flags);  in __pm_relax()
593 	struct wakeup_source *ws = (struct wakeup_source *)data;  in pm_wakeup_timer_fn()  local
596 	spin_lock_irqsave(&ws->lock, flags);  in pm_wakeup_timer_fn()
598 	if (ws->active && ws->timer_expires  in pm_wakeup_timer_fn()
599 	    && time_after_eq(jiffies, ws->timer_expires)) {  in pm_wakeup_timer_fn()
600 		wakeup_source_deactivate(ws);  in pm_wakeup_timer_fn()
601 		ws->expire_count++;  in pm_wakeup_timer_fn()
604 	spin_unlock_irqrestore(&ws->lock, flags);  in pm_wakeup_timer_fn()
619 void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec)  in __pm_wakeup_event()  argument
624 	if (!ws)  in __pm_wakeup_event()
627 	spin_lock_irqsave(&ws->lock, flags);  in __pm_wakeup_event()
629 	wakeup_source_report_event(ws);  in __pm_wakeup_event()
632 		wakeup_source_deactivate(ws);  in __pm_wakeup_event()
640 	if (!ws->timer_expires || time_after(expires, ws->timer_expires)) {  in __pm_wakeup_event()
641 		mod_timer(&ws->timer, expires);  in __pm_wakeup_event()
642 		ws->timer_expires = expires;  in __pm_wakeup_event()
646 	spin_unlock_irqrestore(&ws->lock, flags);  in __pm_wakeup_event()
673 	struct wakeup_source *ws;  in pm_print_active_wakeup_sources()  local
678 	list_for_each_entry_rcu(ws, &wakeup_sources, entry) {  in pm_print_active_wakeup_sources()
679 		if (ws->active) {  in pm_print_active_wakeup_sources()
680 			pr_info("active wakeup source: %s\n", ws->name);  in pm_print_active_wakeup_sources()
684 			    ktime_to_ns(ws->last_time) >  in pm_print_active_wakeup_sources()
686 			last_activity_ws = ws;  in pm_print_active_wakeup_sources()
809 	struct wakeup_source *ws;  in pm_wakep_autosleep_enabled()  local
813 	list_for_each_entry_rcu(ws, &wakeup_sources, entry) {  in pm_wakep_autosleep_enabled()
814 		spin_lock_irq(&ws->lock);  in pm_wakep_autosleep_enabled()
815 		if (ws->autosleep_enabled != set) {  in pm_wakep_autosleep_enabled()
816 			ws->autosleep_enabled = set;  in pm_wakep_autosleep_enabled()
817 			if (ws->active) {  in pm_wakep_autosleep_enabled()
819 					ws->start_prevent_time = now;  in pm_wakep_autosleep_enabled()
821 					update_prevent_sleep_time(ws, now);  in pm_wakep_autosleep_enabled()
824 		spin_unlock_irq(&ws->lock);  in pm_wakep_autosleep_enabled()
838 				     struct wakeup_source *ws)  in print_wakeup_source_stats()  argument
847 	spin_lock_irqsave(&ws->lock, flags);  in print_wakeup_source_stats()
849 	total_time = ws->total_time;  in print_wakeup_source_stats()
850 	max_time = ws->max_time;  in print_wakeup_source_stats()
851 	prevent_sleep_time = ws->prevent_sleep_time;  in print_wakeup_source_stats()
852 	active_count = ws->active_count;  in print_wakeup_source_stats()
853 	if (ws->active) {  in print_wakeup_source_stats()
856 		active_time = ktime_sub(now, ws->last_time);  in print_wakeup_source_stats()
861 		if (ws->autosleep_enabled)  in print_wakeup_source_stats()
863 				ktime_sub(now, ws->start_prevent_time));  in print_wakeup_source_stats()
869 		   ws->name, active_count, ws->event_count,  in print_wakeup_source_stats()
870 		   ws->wakeup_count, ws->expire_count,  in print_wakeup_source_stats()
872 		   ktime_to_ms(max_time), ktime_to_ms(ws->last_time),  in print_wakeup_source_stats()
875 	spin_unlock_irqrestore(&ws->lock, flags);  in print_wakeup_source_stats()
886 	struct wakeup_source *ws;  in wakeup_sources_stats_show()  local
893 	list_for_each_entry_rcu(ws, &wakeup_sources, entry)  in wakeup_sources_stats_show()
894 		print_wakeup_source_stats(m, ws);  in wakeup_sources_stats_show()