diff options
Diffstat (limited to 'drivers/rtc/bfin_rtc.c')
| -rw-r--r-- | drivers/rtc/bfin_rtc.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/drivers/rtc/bfin_rtc.c b/drivers/rtc/bfin_rtc.c index ee8acd359..5de695384 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 */ @@ -42,18 +49,10 @@ 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. */ -void rtc_set(struct rtc_time *tmp) +int rtc_set(struct rtc_time *tmp) { unsigned long remain, days, hrs, mins, secs; @@ -61,9 +60,10 @@ void rtc_set(struct rtc_time *tmp) if (tmp == NULL) { puts("Error setting the date/time\n"); - return; + return -1; } + rtc_init(); wait_for_complete(); /* Calculate number of seconds this incoming time represents */ @@ -82,6 +82,8 @@ void rtc_set(struct rtc_time *tmp) /* Encode these time values into our RTC_STAT register */ bfin_write_RTC_STAT(SET_ALARM(days, hrs, mins, secs)); + + return 0; } /* Read the time from the RTC_STAT. time_in_seconds is seconds since Jan 1970 */ @@ -98,6 +100,7 @@ int rtc_get(struct rtc_time *tmp) return -1; } + rtc_init(); wait_for_complete(); /* Read the RTC_STAT register */ |