rtc: sa1100: remove verification code of alarm

Since next alarm time is already calculated in rtc common interface, we
needn't keep this logic in rtc-sa1100.c any more.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>

1 files changed, 11 insertions, 55 deletions

diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
index fef52c801a13..91d58bdc7f88 100644
--- a/drivers/rtc/rtc-sa1100.c
+++ b/drivers/rtc/rtc-sa1100.c
@@ -44,54 +44,6 @@
 static const unsigned long RTC_FREQ = 1024;
 static DEFINE_SPINLOCK(sa1100_rtc_lock);
 
-/*
- * 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);
@@ -219,16 +171,20 @@ 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;