diff options
| -rw-r--r-- | drivers/rtc/rtc-sa1100.c | 53 |
1 files changed, 41 insertions, 12 deletions
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c index 9683daf56d8e..cb9a585312cc 100644 --- a/drivers/rtc/rtc-sa1100.c +++ b/drivers/rtc/rtc-sa1100.c @@ -45,6 +45,16 @@ static const unsigned long RTC_FREQ = 1024; static struct rtc_time rtc_alarm; static DEFINE_SPINLOCK(sa1100_rtc_lock); +static inline int rtc_periodic_alarm(struct rtc_time *tm) +{ + return (tm->tm_year == -1) || + ((unsigned)tm->tm_mon >= 12) || + ((unsigned)(tm->tm_mday - 1) >= 31) || + ((unsigned)tm->tm_hour > 23) || + ((unsigned)tm->tm_min > 59) || + ((unsigned)tm->tm_sec > 59); +} + /* * Calculate the next alarm time given the requested alarm time mask * and the current time. @@ -72,6 +82,27 @@ static void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now, } } +static int rtc_update_alarm(struct rtc_time *alrm) +{ + struct rtc_time alarm_tm, now_tm; + unsigned long now, time; + int ret; + + do { + now = RCNR; + rtc_time_to_tm(now, &now_tm); + rtc_next_alarm_time(&alarm_tm, &now_tm, alrm); + ret = rtc_tm_to_time(&alarm_tm, &time); + if (ret != 0) + break; + + RTSR = RTSR & (RTSR_HZE|RTSR_ALE|RTSR_AL); + RTAR = time; + } while (now != RCNR); + + return ret; +} + static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) { struct platform_device *pdev = to_platform_device(dev_id); @@ -115,6 +146,9 @@ static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) rtc_update_irq(rtc, 1, events); + if (rtsr & RTSR_AL && rtc_periodic_alarm(&rtc_alarm)) + rtc_update_alarm(&rtc_alarm); + spin_unlock(&sa1100_rtc_lock); return IRQ_HANDLED; @@ -200,21 +234,16 @@ static int sa1100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) static int sa1100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { - struct rtc_time now_tm, alarm_tm; int ret; spin_lock_irq(&sa1100_rtc_lock); - - now = RCNR; - rtc_time_to_tm(now, &now_tm); - rtc_next_alarm_time(&alarm_tm, &now_tm, alrm->time); - rtc_tm_to_time(&alarm_tm, &time); - RTAR = time; - if (alrm->enabled) - RTSR |= RTSR_ALE; - else - RTSR &= ~RTSR_ALE; - + ret = rtc_update_alarm(&alrm->time); + if (ret == 0) { + if (alrm->enabled) + RTSR |= RTSR_ALE; + else + RTSR &= ~RTSR_ALE; + } spin_unlock_irq(&sa1100_rtc_lock); return ret; |