1 files changed, 14 insertions, 2 deletions

diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 3281c90691c3..44fe83ee9bee 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -48,6 +48,7 @@ struct at91_rtc_config {
 
 static const struct at91_rtc_config *at91_rtc_config;
 static DECLARE_COMPLETION(at91_rtc_updated);
+static DECLARE_COMPLETION(at91_rtc_upd_rdy);
 static unsigned int at91_alarm_year = AT91_RTC_EPOCH;
 static void __iomem *at91_rtc_regs;
 static int irq;
@@ -161,6 +162,8 @@ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm)
                 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
                 tm->tm_hour, tm->tm_min, tm->tm_sec);
 
+        wait_for_completion(&at91_rtc_upd_rdy);
+
         /* Stop Time/Calendar from counting */
         cr = at91_rtc_read(AT91_RTC_CR);
         at91_rtc_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM);
@@ -183,7 +186,9 @@ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm)
 
         /* Restart Time/Calendar */
         cr = at91_rtc_read(AT91_RTC_CR);
+        at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_SECEV);
         at91_rtc_write(AT91_RTC_CR, cr & ~(AT91_RTC_UPDCAL | AT91_RTC_UPDTIM));
+        at91_rtc_write_ier(AT91_RTC_SECEV);
 
         return 0;
 }
@@ -290,8 +295,10 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id)
         if (rtsr) {             /* this interrupt is shared!  Is it ours? */
                 if (rtsr & AT91_RTC_ALARM)
                         events |= (RTC_AF | RTC_IRQF);
-                if (rtsr & AT91_RTC_SECEV)
-                        events |= (RTC_UF | RTC_IRQF);
+                if (rtsr & AT91_RTC_SECEV) {
+                        complete(&at91_rtc_upd_rdy);
+                        at91_rtc_write_idr(AT91_RTC_SECEV);
+                }
                 if (rtsr & AT91_RTC_ACKUPD)
                         complete(&at91_rtc_updated);
 
@@ -413,6 +420,11 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
                 return PTR_ERR(rtc);
         platform_set_drvdata(pdev, rtc);
 
+        /* enable SECEV interrupt in order to initialize at91_rtc_upd_rdy
+         * completion.
+         */
+        at91_rtc_write_ier(AT91_RTC_SECEV);
+
         dev_info(&pdev->dev, "AT91 Real Time Clock driver.\n");
         return 0;
 }