drivers/rtc/interface.c

179 				   struct rtc_wkalrm *alarm)
192 		alarm->enabled = 0;
193 		alarm->pending = 0;
194 		alarm->time.tm_sec = -1;
195 		alarm->time.tm_min = -1;
196 		alarm->time.tm_hour = -1;
197 		alarm->time.tm_mday = -1;
198 		alarm->time.tm_mon = -1;
199 		alarm->time.tm_year = -1;
200 		alarm->time.tm_wday = -1;
201 		alarm->time.tm_yday = -1;
202 		alarm->time.tm_isdst = -1;
203 		err = rtc->ops->read_alarm(rtc->dev.parent, alarm);
208 	trace_rtc_read_alarm(rtc_tm_to_time64(&alarm->time), err);
212 int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
222 	 * creating invalid alarm->time values, for reasons like:
230 	 *     to set up as e.g. "alarm 15 minutes after each hour".
235 	 * RTC driver prevents "periodic alarm" modes.
238 	 * may have wrapped in the interval since we read the RTC alarm,
242 	 * Reading the alarm and timestamp in the reverse sequence
246 	 * then read the RTC alarm value,
271 		/* get the RTC alarm values, which may be incomplete */
272 		err = rtc_read_alarm_internal(rtc, alarm);
277 		if (rtc_valid_tm(&alarm->time) == 0) {
278 			rtc_add_offset(rtc, &alarm->time);
293 	/* Fill in the missing alarm fields using the timestamp; we
294 	 * know there's at least one since alarm->time is invalid.
296 	if (alarm->time.tm_sec == -1)
297 		alarm->time.tm_sec = now.tm_sec;
298 	if (alarm->time.tm_min == -1)
299 		alarm->time.tm_min = now.tm_min;
300 	if (alarm->time.tm_hour == -1)
301 		alarm->time.tm_hour = now.tm_hour;
304 	if (alarm->time.tm_mday < 1 || alarm->time.tm_mday > 31) {
305 		alarm->time.tm_mday = now.tm_mday;
308 	if ((unsigned int)alarm->time.tm_mon >= 12) {
309 		alarm->time.tm_mon = now.tm_mon;
313 	if (alarm->time.tm_year == -1) {
314 		alarm->time.tm_year = now.tm_year;
319 	/* Can't proceed if alarm is still invalid after replacing
322 	err = rtc_valid_tm(&alarm->time);
328 	t_alm = rtc_tm_to_time64(&alarm->time);
333 	/* 24 hour rollover ... if it's now 10am Monday, an alarm that
339 		dev_dbg(&rtc->dev, "alarm rollover: %s\n", "day");
341 		rtc_time64_to_tm(t_alm, &alarm->time);
344 	/* Month rollover ... if it's the 31th, an alarm on the 3rd will
345 	 * be next month.  An alarm matching on the 30th, 29th, or 28th
347 	 * this type of alarm.
350 		dev_dbg(&rtc->dev, "alarm rollover: %s\n", "month");
352 			if (alarm->time.tm_mon < 11) {
353 				alarm->time.tm_mon++;
355 				alarm->time.tm_mon = 0;
356 				alarm->time.tm_year++;
358 			days = rtc_month_days(alarm->time.tm_mon,
359 					      alarm->time.tm_year);
360 		} while (days < alarm->time.tm_mday);
365 		dev_dbg(&rtc->dev, "alarm rollover: %s\n", "year");
367 			alarm->time.tm_year++;
368 		} while (!is_leap_year(alarm->time.tm_year + 1900) &&
369 			 rtc_valid_tm(&alarm->time) != 0);
373 		dev_warn(&rtc->dev, "alarm rollover not handled\n");
376 	err = rtc_valid_tm(&alarm->time);
379 	if (err && alarm->enabled)
380 		dev_warn(&rtc->dev, "invalid alarm value: %ptR\n",
381 			 &alarm->time);
386 int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
398 		memset(alarm, 0, sizeof(struct rtc_wkalrm));
399 		alarm->enabled = rtc->aie_timer.enabled;
400 		alarm->time = rtc_ktime_to_tm(rtc->aie_timer.node.expires);
404 	trace_rtc_read_alarm(rtc_tm_to_time64(&alarm->time), err);
409 static int __rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
415 	err = rtc_valid_tm(&alarm->time);
419 	scheduled = rtc_tm_to_time64(&alarm->time);
430 	 * XXX - We just checked to make sure the alarm time is not
432 	 * the is alarm set for the next second and the second ticks
433 	 * over right here, before we set the alarm.
436 	rtc_subtract_offset(rtc, &alarm->time);
443 		err = rtc->ops->set_alarm(rtc->dev.parent, alarm);
445 	trace_rtc_set_alarm(rtc_tm_to_time64(&alarm->time), err);
449 int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
459 	err = rtc_valid_tm(&alarm->time);
463 	err = rtc_valid_range(rtc, &alarm->time);
473 	alarm_time = rtc_tm_to_ktime(alarm->time);
479 		alarm_time = ktime_sub_ns(alarm_time, (u64)alarm->time.tm_sec * NSEC_PER_SEC);
483 	if (alarm->enabled)
493 int rtc_initialize_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
498 	err = rtc_valid_tm(&alarm->time);
510 	rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time);
514 	if (alarm->enabled && (rtc_tm_to_ktime(now) <
796  * the next alarm event appropriately.
826 		struct rtc_wkalrm alarm;
828 		alarm.time = rtc_ktime_to_tm(timer->node.expires);
829 		alarm.enabled = 1;
830 		err = __rtc_set_alarm(rtc, &alarm);
859  * the next alarm event appropriately.
873 		struct rtc_wkalrm alarm;
881 		alarm.time = rtc_ktime_to_tm(next->expires);
882 		alarm.enabled = 1;
883 		err = __rtc_set_alarm(rtc, &alarm);
895  * Expires rtc timers. Reprograms next alarm event if needed.
937 	/* Set next alarm */
939 		struct rtc_wkalrm alarm;
943 		alarm.time = rtc_ktime_to_tm(next->expires);
944 		alarm.enabled = 1;
946 		err = __rtc_set_alarm(rtc, &alarm);