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authorMike Frysinger <vapier@gentoo.org>2008-10-06 03:39:07 -0400
committerMike Frysinger <vapier@gentoo.org>2008-10-23 05:03:50 -0400
commit3c8798983403cb68a827d7a0d09b1134524a1b7d (patch)
treec1edbec9f935f8edfe78378ab1c238c99d4e3ede /drivers/rtc
parent621e579b812dd1a2e6777f7cbf6e55e736505823 (diff)
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Blackfin: only initialize the RTC when actually used
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/bfin_rtc.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/rtc/bfin_rtc.c b/drivers/rtc/bfin_rtc.c
index 3f8c7ed..5de6953 100644
--- a/drivers/rtc/bfin_rtc.c
+++ b/drivers/rtc/bfin_rtc.c
@@ -26,10 +26,17 @@
#define NUM_SECS_IN_HR HRS_TO_SECS(1)
#define NUM_SECS_IN_DAY DAYS_TO_SECS(1)
+/* Enable the RTC prescaler enable register */
+static void rtc_init(void)
+{
+ if (!(bfin_read_RTC_PREN() & 0x1))
+ bfin_write_RTC_PREN(0x1);
+}
+
/* Our on-chip RTC has no notion of "reset" */
void rtc_reset(void)
{
- return;
+ rtc_init();
}
/* Wait for pending writes to complete */
@@ -42,14 +49,6 @@ static void wait_for_complete(void)
bfin_write_RTC_ISTAT(WRITE_COMPLETE);
}
-/* Enable the RTC prescaler enable register */
-int rtc_init(void)
-{
- pr_stamp();
- bfin_write_RTC_PREN(0x1);
- return 0;
-}
-
/* Set the time. Get the time_in_secs which is the number of seconds since Jan 1970 and set the RTC registers
* based on this value.
*/
@@ -64,6 +63,7 @@ int rtc_set(struct rtc_time *tmp)
return -1;
}
+ rtc_init();
wait_for_complete();
/* Calculate number of seconds this incoming time represents */
@@ -100,6 +100,7 @@ int rtc_get(struct rtc_time *tmp)
return -1;
}
+ rtc_init();
wait_for_complete();
/* Read the RTC_STAT register */