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_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled) { int err = mutex_lock_interruptible(&rtc->ops_lock); if (err) return err; if (rtc->aie_timer.enabled != enabled) { if (enabled) err = rtc_timer_enqueue(rtc, &rtc->aie_timer); else rtc_timer_remove(rtc, &rtc->aie_timer); } if (err) /* nothing */; else if (!rtc->ops) err = -ENODEV; else if (!rtc->ops->alarm_irq_enable) err = -EINVAL; else err = rtc->ops->alarm_irq_enable(rtc->dev.parent, enabled); mutex_unlock(&rtc->ops_lock); trace_rtc_alarm_irq_enable(enabled, err); return err; }
int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled) { int err; err = mutex_lock_interruptible(&rtc->ops_lock); if (err) return err; #ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL if (enabled == 0 && rtc->uie_irq_active) { mutex_unlock(&rtc->ops_lock); return rtc_dev_update_irq_enable_emul(rtc, 0); } #endif /* make sure we're changing state */ if (rtc->uie_rtctimer.enabled == enabled) goto out; if (rtc->uie_unsupported) { err = -EINVAL; goto out; } if (enabled) { struct rtc_time tm; ktime_t now, onesec; __rtc_read_time(rtc, &tm); onesec = ktime_set(1, 0); now = rtc_tm_to_ktime(tm); rtc->uie_rtctimer.node.expires = ktime_add(now, onesec); rtc->uie_rtctimer.period = ktime_set(1, 0); err = rtc_timer_enqueue(rtc, &rtc->uie_rtctimer); } else { rtc_timer_remove(rtc, &rtc->uie_rtctimer); } out: mutex_unlock(&rtc->ops_lock); #ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL /* * Enable emulation if the driver returned -EINVAL to signal that it has * been configured without interrupts or they are not available at the * moment. */ if (err == -EINVAL) err = rtc_dev_update_irq_enable_emul(rtc, enabled); #endif return err; }