From 3c8798983403cb68a827d7a0d09b1134524a1b7d Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Mon, 6 Oct 2008 03:39:07 -0400 Subject: Blackfin: only initialize the RTC when actually used Signed-off-by: Mike Frysinger --- drivers/rtc/bfin_rtc.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) (limited to 'drivers') diff --git a/drivers/rtc/bfin_rtc.c b/drivers/rtc/bfin_rtc.c index 3f8c7eda60..5de695384f 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 */ -- cgit v1.2.1