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path: root/drivers/rtc/rtc-sa1100.c
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Diffstat (limited to 'drivers/rtc/rtc-sa1100.c')
-rw-r--r--drivers/rtc/rtc-sa1100.c81
1 files changed, 11 insertions, 70 deletions
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
index fb758db9d0f4..44cd81c72ea1 100644
--- a/drivers/rtc/rtc-sa1100.c
+++ b/drivers/rtc/rtc-sa1100.c
@@ -42,67 +42,8 @@
#define RTC_DEF_TRIM 0
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.
- */
-static void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now,
- struct rtc_time *alrm)
-{
- unsigned long next_time;
- unsigned long now_time;
-
- next->tm_year = now->tm_year;
- next->tm_mon = now->tm_mon;
- next->tm_mday = now->tm_mday;
- next->tm_hour = alrm->tm_hour;
- next->tm_min = alrm->tm_min;
- next->tm_sec = alrm->tm_sec;
-
- rtc_tm_to_time(now, &now_time);
- rtc_tm_to_time(next, &next_time);
-
- if (next_time < now_time) {
- /* Advance one day */
- next_time += 60 * 60 * 24;
- rtc_time_to_tm(next_time, next);
- }
-}
-
-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);
@@ -146,9 +87,6 @@ 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;
@@ -224,7 +162,6 @@ static int sa1100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
u32 rtsr;
- memcpy(&alrm->time, &rtc_alarm, sizeof(struct rtc_time));
rtsr = RTSR;
alrm->enabled = (rtsr & RTSR_ALE) ? 1 : 0;
alrm->pending = (rtsr & RTSR_AL) ? 1 : 0;
@@ -233,16 +170,20 @@ 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)
{
+ unsigned long time;
int ret;
spin_lock_irq(&sa1100_rtc_lock);
- ret = rtc_update_alarm(&alrm->time);
- if (ret == 0) {
- if (alrm->enabled)
- RTSR |= RTSR_ALE;
- else
- RTSR &= ~RTSR_ALE;
- }
+ ret = rtc_tm_to_time(&alrm->time, &time);
+ if (ret != 0)
+ goto out;
+ RTSR = RTSR & (RTSR_HZE|RTSR_ALE|RTSR_AL);
+ RTAR = time;
+ if (alrm->enabled)
+ RTSR |= RTSR_ALE;
+ else
+ RTSR &= ~RTSR_ALE;
+out:
spin_unlock_irq(&sa1100_rtc_lock);
return ret;