Lines Matching +full:no +full:- +full:read +full:- +full:rollover
30 if (!rtc->offset_secs) in rtc_add_offset()
38 * between expanded range and original range, which is no need to add in rtc_add_offset()
41 if ((rtc->start_secs > rtc->range_min && secs >= rtc->start_secs) || in rtc_add_offset()
42 (rtc->start_secs < rtc->range_min && in rtc_add_offset()
43 secs <= (rtc->start_secs + rtc->range_max - rtc->range_min))) in rtc_add_offset()
46 rtc_time64_to_tm(secs + rtc->offset_secs, tm); in rtc_add_offset()
53 if (!rtc->offset_secs) in rtc_subtract_offset()
60 * device, then no need to subtract the offset when setting time to RTC in rtc_subtract_offset()
64 if (secs >= rtc->range_min && secs <= rtc->range_max) in rtc_subtract_offset()
67 rtc_time64_to_tm(secs - rtc->offset_secs, tm); in rtc_subtract_offset()
72 if (rtc->range_min != rtc->range_max) { in rtc_valid_range()
74 time64_t range_min = rtc->set_start_time ? rtc->start_secs : in rtc_valid_range()
75 rtc->range_min; in rtc_valid_range()
76 time64_t range_max = rtc->set_start_time ? in rtc_valid_range()
77 (rtc->start_secs + rtc->range_max - rtc->range_min) : in rtc_valid_range()
78 rtc->range_max; in rtc_valid_range()
81 return -ERANGE; in rtc_valid_range()
90 if (!rtc->ops) in __rtc_read_time()
91 err = -ENODEV; in __rtc_read_time()
92 else if (!rtc->ops->read_time) in __rtc_read_time()
93 err = -EINVAL; in __rtc_read_time()
96 err = rtc->ops->read_time(rtc->dev.parent, tm); in __rtc_read_time()
98 dev_dbg(&rtc->dev, "read_time: fail to read: %d\n", in __rtc_read_time()
107 dev_dbg(&rtc->dev, "read_time: rtc_time isn't valid\n"); in __rtc_read_time()
116 err = mutex_lock_interruptible(&rtc->ops_lock); in rtc_read_time()
121 mutex_unlock(&rtc->ops_lock); in rtc_read_time()
143 uie = rtc->uie_rtctimer.enabled || rtc->uie_irq_active; in rtc_set_time()
145 uie = rtc->uie_rtctimer.enabled; in rtc_set_time()
153 err = mutex_lock_interruptible(&rtc->ops_lock); in rtc_set_time()
157 if (!rtc->ops) in rtc_set_time()
158 err = -ENODEV; in rtc_set_time()
159 else if (rtc->ops->set_time) in rtc_set_time()
160 err = rtc->ops->set_time(rtc->dev.parent, tm); in rtc_set_time()
161 else if (rtc->ops->set_mmss64) { in rtc_set_time()
164 err = rtc->ops->set_mmss64(rtc->dev.parent, secs64); in rtc_set_time()
165 } else if (rtc->ops->set_mmss) { in rtc_set_time()
167 err = rtc->ops->set_mmss(rtc->dev.parent, secs64); in rtc_set_time()
169 err = -EINVAL; in rtc_set_time()
171 pm_stay_awake(rtc->dev.parent); in rtc_set_time()
172 mutex_unlock(&rtc->ops_lock); in rtc_set_time()
174 schedule_work(&rtc->irqwork); in rtc_set_time()
191 err = mutex_lock_interruptible(&rtc->ops_lock); in rtc_read_alarm_internal()
195 if (rtc->ops == NULL) in rtc_read_alarm_internal()
196 err = -ENODEV; in rtc_read_alarm_internal()
197 else if (!rtc->ops->read_alarm) in rtc_read_alarm_internal()
198 err = -EINVAL; in rtc_read_alarm_internal()
200 alarm->enabled = 0; in rtc_read_alarm_internal()
201 alarm->pending = 0; in rtc_read_alarm_internal()
202 alarm->time.tm_sec = -1; in rtc_read_alarm_internal()
203 alarm->time.tm_min = -1; in rtc_read_alarm_internal()
204 alarm->time.tm_hour = -1; in rtc_read_alarm_internal()
205 alarm->time.tm_mday = -1; in rtc_read_alarm_internal()
206 alarm->time.tm_mon = -1; in rtc_read_alarm_internal()
207 alarm->time.tm_year = -1; in rtc_read_alarm_internal()
208 alarm->time.tm_wday = -1; in rtc_read_alarm_internal()
209 alarm->time.tm_yday = -1; in rtc_read_alarm_internal()
210 alarm->time.tm_isdst = -1; in rtc_read_alarm_internal()
211 err = rtc->ops->read_alarm(rtc->dev.parent, alarm); in rtc_read_alarm_internal()
214 mutex_unlock(&rtc->ops_lock); in rtc_read_alarm_internal()
216 trace_rtc_read_alarm(rtc_tm_to_time64(&alarm->time), err); in rtc_read_alarm_internal()
229 /* The lower level RTC driver may return -1 in some fields, in __rtc_read_alarm()
230 * creating invalid alarm->time values, for reasons like: in __rtc_read_alarm()
232 * - The hardware may not be capable of filling them in; in __rtc_read_alarm()
233 * many alarms match only on time-of-day fields, not in __rtc_read_alarm()
236 * - Some hardware uses illegal values as "wildcard" match in __rtc_read_alarm()
237 * values, which non-Linux firmware (like a BIOS) may try in __rtc_read_alarm()
242 * a current RTC timestamp for any missing (-1) values. The in __rtc_read_alarm()
246 * may have wrapped in the interval since we read the RTC alarm, in __rtc_read_alarm()
248 * of the -1 fields. in __rtc_read_alarm()
253 * So, we must first read the RTC timestamp, in __rtc_read_alarm()
254 * then read the RTC alarm value, in __rtc_read_alarm()
255 * and then read a second RTC timestamp. in __rtc_read_alarm()
260 * the low-level rtc_read_alarm_internal() function. in __rtc_read_alarm()
284 /* full-function RTCs won't have such missing fields */ in __rtc_read_alarm()
285 if (rtc_valid_tm(&alarm->time) == 0) { in __rtc_read_alarm()
286 rtc_add_offset(rtc, &alarm->time); in __rtc_read_alarm()
302 * know there's at least one since alarm->time is invalid. in __rtc_read_alarm()
304 if (alarm->time.tm_sec == -1) in __rtc_read_alarm()
305 alarm->time.tm_sec = now.tm_sec; in __rtc_read_alarm()
306 if (alarm->time.tm_min == -1) in __rtc_read_alarm()
307 alarm->time.tm_min = now.tm_min; in __rtc_read_alarm()
308 if (alarm->time.tm_hour == -1) in __rtc_read_alarm()
309 alarm->time.tm_hour = now.tm_hour; in __rtc_read_alarm()
311 /* For simplicity, only support date rollover for now */ in __rtc_read_alarm()
312 if (alarm->time.tm_mday < 1 || alarm->time.tm_mday > 31) { in __rtc_read_alarm()
313 alarm->time.tm_mday = now.tm_mday; in __rtc_read_alarm()
316 if ((unsigned)alarm->time.tm_mon >= 12) { in __rtc_read_alarm()
317 alarm->time.tm_mon = now.tm_mon; in __rtc_read_alarm()
321 if (alarm->time.tm_year == -1) { in __rtc_read_alarm()
322 alarm->time.tm_year = now.tm_year; in __rtc_read_alarm()
330 err = rtc_valid_tm(&alarm->time); in __rtc_read_alarm()
334 /* with luck, no rollover is needed */ in __rtc_read_alarm()
336 t_alm = rtc_tm_to_time64(&alarm->time); in __rtc_read_alarm()
342 /* 24 hour rollover ... if it's now 10am Monday, an alarm that in __rtc_read_alarm()
348 dev_dbg(&rtc->dev, "alarm rollover: %s\n", "day"); in __rtc_read_alarm()
350 rtc_time64_to_tm(t_alm, &alarm->time); in __rtc_read_alarm()
353 /* Month rollover ... if it's the 31th, an alarm on the 3rd will in __rtc_read_alarm()
359 dev_dbg(&rtc->dev, "alarm rollover: %s\n", "month"); in __rtc_read_alarm()
361 if (alarm->time.tm_mon < 11) in __rtc_read_alarm()
362 alarm->time.tm_mon++; in __rtc_read_alarm()
364 alarm->time.tm_mon = 0; in __rtc_read_alarm()
365 alarm->time.tm_year++; in __rtc_read_alarm()
367 days = rtc_month_days(alarm->time.tm_mon, in __rtc_read_alarm()
368 alarm->time.tm_year); in __rtc_read_alarm()
369 } while (days < alarm->time.tm_mday); in __rtc_read_alarm()
372 /* Year rollover ... easy except for leap years! */ in __rtc_read_alarm()
374 dev_dbg(&rtc->dev, "alarm rollover: %s\n", "year"); in __rtc_read_alarm()
376 alarm->time.tm_year++; in __rtc_read_alarm()
377 } while (!is_leap_year(alarm->time.tm_year + 1900) in __rtc_read_alarm()
378 && rtc_valid_tm(&alarm->time) != 0); in __rtc_read_alarm()
382 dev_warn(&rtc->dev, "alarm rollover not handled\n"); in __rtc_read_alarm()
385 err = rtc_valid_tm(&alarm->time); in __rtc_read_alarm()
389 dev_warn(&rtc->dev, "invalid alarm value: %d-%d-%d %d:%d:%d\n", in __rtc_read_alarm()
390 alarm->time.tm_year + 1900, alarm->time.tm_mon + 1, in __rtc_read_alarm()
391 alarm->time.tm_mday, alarm->time.tm_hour, alarm->time.tm_min, in __rtc_read_alarm()
392 alarm->time.tm_sec); in __rtc_read_alarm()
402 err = mutex_lock_interruptible(&rtc->ops_lock); in rtc_read_alarm()
405 if (rtc->ops == NULL) in rtc_read_alarm()
406 err = -ENODEV; in rtc_read_alarm()
407 else if (!rtc->ops->read_alarm) in rtc_read_alarm()
408 err = -EINVAL; in rtc_read_alarm()
411 alarm->enabled = rtc->aie_timer.enabled; in rtc_read_alarm()
412 alarm->time = rtc_ktime_to_tm(rtc->aie_timer.node.expires); in rtc_read_alarm()
414 mutex_unlock(&rtc->ops_lock); in rtc_read_alarm()
416 trace_rtc_read_alarm(rtc_tm_to_time64(&alarm->time), err); in rtc_read_alarm()
427 err = rtc_valid_tm(&alarm->time); in __rtc_set_alarm()
431 scheduled = rtc_tm_to_time64(&alarm->time); in __rtc_set_alarm()
439 return -ETIME; in __rtc_set_alarm()
441 * XXX - We just checked to make sure the alarm time is not in __rtc_set_alarm()
447 rtc_subtract_offset(rtc, &alarm->time); in __rtc_set_alarm()
449 if (!rtc->ops) in __rtc_set_alarm()
450 err = -ENODEV; in __rtc_set_alarm()
451 else if (!rtc->ops->set_alarm) in __rtc_set_alarm()
452 err = -EINVAL; in __rtc_set_alarm()
454 err = rtc->ops->set_alarm(rtc->dev.parent, alarm); in __rtc_set_alarm()
456 trace_rtc_set_alarm(rtc_tm_to_time64(&alarm->time), err); in __rtc_set_alarm()
464 if (!rtc->ops) in rtc_set_alarm()
465 return -ENODEV; in rtc_set_alarm()
466 else if (!rtc->ops->set_alarm) in rtc_set_alarm()
467 return -EINVAL; in rtc_set_alarm()
469 err = rtc_valid_tm(&alarm->time); in rtc_set_alarm()
473 err = rtc_valid_range(rtc, &alarm->time); in rtc_set_alarm()
477 err = mutex_lock_interruptible(&rtc->ops_lock); in rtc_set_alarm()
480 if (rtc->aie_timer.enabled) in rtc_set_alarm()
481 rtc_timer_remove(rtc, &rtc->aie_timer); in rtc_set_alarm()
483 rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time); in rtc_set_alarm()
484 rtc->aie_timer.period = 0; in rtc_set_alarm()
485 if (alarm->enabled) in rtc_set_alarm()
486 err = rtc_timer_enqueue(rtc, &rtc->aie_timer); in rtc_set_alarm()
488 mutex_unlock(&rtc->ops_lock); in rtc_set_alarm()
500 err = rtc_valid_tm(&alarm->time); in rtc_initialize_alarm()
508 err = mutex_lock_interruptible(&rtc->ops_lock); in rtc_initialize_alarm()
512 rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time); in rtc_initialize_alarm()
513 rtc->aie_timer.period = 0; in rtc_initialize_alarm()
516 if (alarm->enabled && (rtc_tm_to_ktime(now) < in rtc_initialize_alarm()
517 rtc->aie_timer.node.expires)) { in rtc_initialize_alarm()
519 rtc->aie_timer.enabled = 1; in rtc_initialize_alarm()
520 timerqueue_add(&rtc->timerqueue, &rtc->aie_timer.node); in rtc_initialize_alarm()
521 trace_rtc_timer_enqueue(&rtc->aie_timer); in rtc_initialize_alarm()
523 mutex_unlock(&rtc->ops_lock); in rtc_initialize_alarm()
530 int err = mutex_lock_interruptible(&rtc->ops_lock); in rtc_alarm_irq_enable()
534 if (rtc->aie_timer.enabled != enabled) { in rtc_alarm_irq_enable()
536 err = rtc_timer_enqueue(rtc, &rtc->aie_timer); in rtc_alarm_irq_enable()
538 rtc_timer_remove(rtc, &rtc->aie_timer); in rtc_alarm_irq_enable()
543 else if (!rtc->ops) in rtc_alarm_irq_enable()
544 err = -ENODEV; in rtc_alarm_irq_enable()
545 else if (!rtc->ops->alarm_irq_enable) in rtc_alarm_irq_enable()
546 err = -EINVAL; in rtc_alarm_irq_enable()
548 err = rtc->ops->alarm_irq_enable(rtc->dev.parent, enabled); in rtc_alarm_irq_enable()
550 mutex_unlock(&rtc->ops_lock); in rtc_alarm_irq_enable()
559 int err = mutex_lock_interruptible(&rtc->ops_lock); in rtc_update_irq_enable()
564 if (enabled == 0 && rtc->uie_irq_active) { in rtc_update_irq_enable()
565 mutex_unlock(&rtc->ops_lock); in rtc_update_irq_enable()
570 if (rtc->uie_rtctimer.enabled == enabled) in rtc_update_irq_enable()
573 if (rtc->uie_unsupported) { in rtc_update_irq_enable()
574 err = -EINVAL; in rtc_update_irq_enable()
585 rtc->uie_rtctimer.node.expires = ktime_add(now, onesec); in rtc_update_irq_enable()
586 rtc->uie_rtctimer.period = ktime_set(1, 0); in rtc_update_irq_enable()
587 err = rtc_timer_enqueue(rtc, &rtc->uie_rtctimer); in rtc_update_irq_enable()
589 rtc_timer_remove(rtc, &rtc->uie_rtctimer); in rtc_update_irq_enable()
592 mutex_unlock(&rtc->ops_lock); in rtc_update_irq_enable()
597 * -EINVAL to signal that it has been configured without in rtc_update_irq_enable()
600 if (err == -EINVAL) in rtc_update_irq_enable()
610 * rtc_handle_legacy_irq - AIE, UIE and PIE event hook
623 spin_lock_irqsave(&rtc->irq_lock, flags); in rtc_handle_legacy_irq()
624 rtc->irq_data = (rtc->irq_data + (num << 8)) | (RTC_IRQF|mode); in rtc_handle_legacy_irq()
625 spin_unlock_irqrestore(&rtc->irq_lock, flags); in rtc_handle_legacy_irq()
627 wake_up_interruptible(&rtc->irq_queue); in rtc_handle_legacy_irq()
628 kill_fasync(&rtc->async_queue, SIGIO, POLL_IN); in rtc_handle_legacy_irq()
633 * rtc_aie_update_irq - AIE mode rtctimer hook
646 * rtc_uie_update_irq - UIE mode rtctimer hook
659 * rtc_pie_update_irq - PIE mode hrtimer hook
673 period = NSEC_PER_SEC / rtc->irq_freq; in rtc_pie_update_irq()
682 * rtc_update_irq - Triggered when a RTC interrupt occurs.
694 pm_stay_awake(rtc->dev.parent); in rtc_update_irq()
695 schedule_work(&rtc->irqwork); in rtc_update_irq()
718 if (!try_module_get(rtc->owner)) { in rtc_class_open()
730 module_put(rtc->owner); in rtc_class_close()
731 put_device(&rtc->dev); in rtc_class_close()
739 * we could run into BUG_ON(timer->state != HRTIMER_STATE_CALLBACK); in rtc_update_hrtimer()
744 * could be blocked on rtc->irq_task_lock and hrtimer_cancel() in rtc_update_hrtimer()
747 if (hrtimer_try_to_cancel(&rtc->pie_timer) < 0) in rtc_update_hrtimer()
748 return -1; in rtc_update_hrtimer()
751 ktime_t period = NSEC_PER_SEC / rtc->irq_freq; in rtc_update_hrtimer()
753 hrtimer_start(&rtc->pie_timer, period, HRTIMER_MODE_REL); in rtc_update_hrtimer()
759 * rtc_irq_set_state - enable/disable 2^N Hz periodic IRQs
775 rtc->pie_enabled = enabled; in rtc_irq_set_state()
782 * rtc_irq_set_freq - set 2^N Hz periodic IRQ frequency for IRQ
796 return -EINVAL; in rtc_irq_set_freq()
798 rtc->irq_freq = freq; in rtc_irq_set_freq()
799 while (rtc->pie_enabled && rtc_update_hrtimer(rtc, 1) < 0) in rtc_irq_set_freq()
807 * rtc_timer_enqueue - Adds a rtc_timer to the rtc_device timerqueue
820 struct timerqueue_node *next = timerqueue_getnext(&rtc->timerqueue); in rtc_timer_enqueue()
824 timer->enabled = 1; in rtc_timer_enqueue()
830 if (next->expires >= now) in rtc_timer_enqueue()
835 timerqueue_add(&rtc->timerqueue, &timer->node); in rtc_timer_enqueue()
837 if (!next || ktime_before(timer->node.expires, next->expires)) { in rtc_timer_enqueue()
840 alarm.time = rtc_ktime_to_tm(timer->node.expires); in rtc_timer_enqueue()
843 if (err == -ETIME) { in rtc_timer_enqueue()
844 pm_stay_awake(rtc->dev.parent); in rtc_timer_enqueue()
845 schedule_work(&rtc->irqwork); in rtc_timer_enqueue()
847 timerqueue_del(&rtc->timerqueue, &timer->node); in rtc_timer_enqueue()
849 timer->enabled = 0; in rtc_timer_enqueue()
858 if (!rtc->ops || !rtc->ops->alarm_irq_enable) in rtc_alarm_disable()
861 rtc->ops->alarm_irq_enable(rtc->dev.parent, false); in rtc_alarm_disable()
866 * rtc_timer_remove - Removes a rtc_timer from the rtc_device timerqueue
879 struct timerqueue_node *next = timerqueue_getnext(&rtc->timerqueue); in rtc_timer_remove()
880 timerqueue_del(&rtc->timerqueue, &timer->node); in rtc_timer_remove()
882 timer->enabled = 0; in rtc_timer_remove()
883 if (next == &timer->node) { in rtc_timer_remove()
886 next = timerqueue_getnext(&rtc->timerqueue); in rtc_timer_remove()
891 alarm.time = rtc_ktime_to_tm(next->expires); in rtc_timer_remove()
894 if (err == -ETIME) { in rtc_timer_remove()
895 pm_stay_awake(rtc->dev.parent); in rtc_timer_remove()
896 schedule_work(&rtc->irqwork); in rtc_timer_remove()
902 * rtc_timer_do_work - Expires rtc timers
921 mutex_lock(&rtc->ops_lock); in rtc_timer_do_work()
925 while ((next = timerqueue_getnext(&rtc->timerqueue))) { in rtc_timer_do_work()
926 if (next->expires > now) in rtc_timer_do_work()
931 timerqueue_del(&rtc->timerqueue, &timer->node); in rtc_timer_do_work()
933 timer->enabled = 0; in rtc_timer_do_work()
934 if (timer->func) in rtc_timer_do_work()
935 timer->func(timer->private_data); in rtc_timer_do_work()
938 /* Re-add/fwd periodic timers */ in rtc_timer_do_work()
939 if (ktime_to_ns(timer->period)) { in rtc_timer_do_work()
940 timer->node.expires = ktime_add(timer->node.expires, in rtc_timer_do_work()
941 timer->period); in rtc_timer_do_work()
942 timer->enabled = 1; in rtc_timer_do_work()
943 timerqueue_add(&rtc->timerqueue, &timer->node); in rtc_timer_do_work()
954 alarm.time = rtc_ktime_to_tm(next->expires); in rtc_timer_do_work()
958 if (err == -ETIME) in rtc_timer_do_work()
961 if (retry-- > 0) in rtc_timer_do_work()
965 timerqueue_del(&rtc->timerqueue, &timer->node); in rtc_timer_do_work()
967 timer->enabled = 0; in rtc_timer_do_work()
968 dev_err(&rtc->dev, "__rtc_set_alarm: err=%d\n", err); in rtc_timer_do_work()
974 pm_relax(rtc->dev.parent); in rtc_timer_do_work()
975 mutex_unlock(&rtc->ops_lock); in rtc_timer_do_work()
979 /* rtc_timer_init - Initializes an rtc_timer
988 timerqueue_init(&timer->node); in rtc_timer_init()
989 timer->enabled = 0; in rtc_timer_init()
990 timer->func = f; in rtc_timer_init()
991 timer->private_data = data; in rtc_timer_init()
994 /* rtc_timer_start - Sets an rtc_timer to fire in the future
1006 mutex_lock(&rtc->ops_lock); in rtc_timer_start()
1007 if (timer->enabled) in rtc_timer_start()
1010 timer->node.expires = expires; in rtc_timer_start()
1011 timer->period = period; in rtc_timer_start()
1015 mutex_unlock(&rtc->ops_lock); in rtc_timer_start()
1019 /* rtc_timer_cancel - Stops an rtc_timer
1027 mutex_lock(&rtc->ops_lock); in rtc_timer_cancel()
1028 if (timer->enabled) in rtc_timer_cancel()
1030 mutex_unlock(&rtc->ops_lock); in rtc_timer_cancel()
1034 * rtc_read_offset - Read the amount of rtc offset in parts per billion
1040 * Kernel interface to read rtc clock offset
1042 * If read_offset() is not implemented for the rtc, return -EINVAL
1048 if (!rtc->ops) in rtc_read_offset()
1049 return -ENODEV; in rtc_read_offset()
1051 if (!rtc->ops->read_offset) in rtc_read_offset()
1052 return -EINVAL; in rtc_read_offset()
1054 mutex_lock(&rtc->ops_lock); in rtc_read_offset()
1055 ret = rtc->ops->read_offset(rtc->dev.parent, offset); in rtc_read_offset()
1056 mutex_unlock(&rtc->ops_lock); in rtc_read_offset()
1063 * rtc_set_offset - Adjusts the duration of the average second
1072 * t = t0 * (1 + offset * 1e-9)
1077 * If the rtc offset is not setable (or not implemented), return -EINVAL
1083 if (!rtc->ops) in rtc_set_offset()
1084 return -ENODEV; in rtc_set_offset()
1086 if (!rtc->ops->set_offset) in rtc_set_offset()
1087 return -EINVAL; in rtc_set_offset()
1089 mutex_lock(&rtc->ops_lock); in rtc_set_offset()
1090 ret = rtc->ops->set_offset(rtc->dev.parent, offset); in rtc_set_offset()
1091 mutex_unlock(&rtc->ops_lock); in rtc_set_offset()