drivers/rtc/interface.c

20 static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer);
21 static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer);
164 	/* A timer might have just expired */
654  * @timer: pointer to the pie mode hrtimer
660 enum hrtimer_restart rtc_pie_update_irq(struct hrtimer *timer)
666 	rtc = container_of(timer, struct rtc_device, pie_timer);
669 	count = hrtimer_forward_now(timer, period);
724 	 * We always cancel the timer here first, because otherwise
725 	 * we could run into BUG_ON(timer->state != HRTIMER_STATE_CALLBACK);
726 	 * when we manage to start the timer before the callback
793  * @timer: timer being added.
795  * Enqueues a timer onto the rtc devices timerqueue and sets
798  * Sets the enabled bit on the added timer.
802 static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer)
813 	timer->enabled = 1;
823 	timerqueue_add(&rtc->timerqueue, &timer->node);
824 	trace_rtc_timer_enqueue(timer);
825 	if (!next || ktime_before(timer->node.expires, next->expires)) {
828 		alarm.time = rtc_ktime_to_tm(timer->node.expires);
835 			timerqueue_del(&rtc->timerqueue, &timer->node);
836 			trace_rtc_timer_dequeue(timer);
837 			timer->enabled = 0;
856  * @timer: timer being removed.
858  * Removes a timer onto the rtc devices timerqueue and sets
861  * Clears the enabled bit on the removed timer.
865 static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer)
869 	timerqueue_del(&rtc->timerqueue, &timer->node);
870 	trace_rtc_timer_dequeue(timer);
871 	timer->enabled = 0;
872 	if (next == &timer->node) {
902 	struct rtc_timer *timer;
918 		/* expire timer */
919 		timer = container_of(next, struct rtc_timer, node);
920 		timerqueue_del(&rtc->timerqueue, &timer->node);
921 		trace_rtc_timer_dequeue(timer);
922 		timer->enabled = 0;
923 		if (timer->func)
924 			timer->func(timer->rtc);
926 		trace_rtc_timer_fired(timer);
928 		if (ktime_to_ns(timer->period)) {
929 			timer->node.expires = ktime_add(timer->node.expires,
930 							timer->period);
931 			timer->enabled = 1;
932 			timerqueue_add(&rtc->timerqueue, &timer->node);
933 			trace_rtc_timer_enqueue(timer);
953 			timer = container_of(next, struct rtc_timer, node);
954 			timerqueue_del(&rtc->timerqueue, &timer->node);
955 			trace_rtc_timer_dequeue(timer);
956 			timer->enabled = 0;
969  * @timer: timer to be intiialized
970  * @f: function pointer to be called when timer fires
975 void rtc_timer_init(struct rtc_timer *timer, void (*f)(struct rtc_device *r),
978 	timerqueue_init(&timer->node);
979 	timer->enabled = 0;
980 	timer->func = f;
981 	timer->rtc = rtc;
986  * @ timer: timer being set
987  * @ expires: time at which to expire the timer
988  * @ period: period that the timer will recur
992 int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer *timer,
998 	if (timer->enabled)
999 		rtc_timer_remove(rtc, timer);
1001 	timer->node.expires = expires;
1002 	timer->period = period;
1004 	ret = rtc_timer_enqueue(rtc, timer);
1012  * @ timer: timer being set
1016 void rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer *timer)
1019 	if (timer->enabled)
1020 		rtc_timer_remove(rtc, timer);