int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
{
int err;
if (!rtc->ops)
return -ENODEV;
else if (!rtc->ops->set_alarm)
return -EINVAL;
err = rtc_valid_tm(&alarm->time);
if (err != 0)
return err;
err = rtc_valid_range(rtc, &alarm->time);
if (err)
return err;
err = mutex_lock_interruptible(&rtc->ops_lock);
if (err)
return err;
if (rtc->aie_timer.enabled)
rtc_timer_remove(rtc, &rtc->aie_timer);
rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time);
rtc->aie_timer.period = 0;
if (alarm->enabled)
err = rtc_timer_enqueue(rtc, &rtc->aie_timer);
mutex_unlock(&rtc->ops_lock);
return err;
}
int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm)
{
int err;
err = rtc_valid_tm(tm);
if (err != 0)
return err;
err = rtc_valid_range(rtc, tm);
if (err)
return err;
rtc_subtract_offset(rtc, tm);
err = mutex_lock_interruptible(&rtc->ops_lock);
if (err)
return err;
if (!rtc->ops)
err = -ENODEV;
else if (rtc->ops->set_time)
err = rtc->ops->set_time(rtc->dev.parent, tm);
else
err = -EINVAL;
pm_stay_awake(rtc->dev.parent);
mutex_unlock(&rtc->ops_lock);
/* A timer might have just expired */
schedule_work(&rtc->irqwork);
trace_rtc_set_time(rtc_tm_to_time64(tm), err);
return err;
}
