Blackfin: only initialize the RTC when actually used

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/drivers/rtc/bfin_rtc.c b/drivers/rtc/bfin_rtc.c
index 3f8c7eda60d96377270e95ab1df23c1f2245cedb..5de695384f1588dfa4e49dcd4ea90339ffa46c0a 100644 (file)
--- 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 */

diff --git a/lib_blackfin/board.c b/lib_blackfin/board.c
index ba573928b9e6abe24cb5d367efdaadac3a40cdc1..2679b438fea50df23a1b6d67ea5942f692253fed 100644 (file)
--- a/lib_blackfin/board.c
+++ b/lib_blackfin/board.c
@@ -250,7 +250,6 @@ void init_cplbtables(void)
 
 extern int exception_init(void);
 extern int irq_init(void);
-extern int rtc_init(void);
 extern int timer_init(void);
 
 void board_init_f(ulong bootflag)
@@ -313,9 +312,6 @@ void board_init_f(ulong bootflag)
        display_banner();
 
        checkboard();
-#if defined(CONFIG_RTC_BFIN) && defined(CONFIG_CMD_DATE)
-       rtc_init();
-#endif
        timer_init();
 
        printf("Clock: VCO: %lu MHz, Core: %lu MHz, System: %lu MHz\n",