X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Frtc%2Fbfin_rtc.c;h=21a2189e2753b8d2fffceecc41a5e3c2b4c780e6;hb=93e1459641e758d2b096d3f1b39414a39bb314f8;hp=5755a20bc52e853db8771123a8601fdb8cc5afbc;hpb=5561857aae9a5921772b18b571708956788148d8;p=karo-tx-uboot.git

diff --git a/drivers/rtc/bfin_rtc.c b/drivers/rtc/bfin_rtc.c
index 5755a20bc5..21a2189e27 100644
--- a/drivers/rtc/bfin_rtc.c
+++ b/drivers/rtc/bfin_rtc.c
@@ -11,7 +11,7 @@
 #include <command.h>
 #include <rtc.h>
 
-#if defined(CONFIG_RTC_BFIN) && defined(CONFIG_CMD_DATE)
+#if defined(CONFIG_CMD_DATE)
 
 #include <asm/blackfin.h>
 #include <asm/mach-common/bits/rtc.h>
@@ -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;
 
@@ -61,14 +60,15 @@ 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 */
 	remain = mktime(tmp->tm_year, tmp->tm_mon, tmp->tm_mday,
-	                tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
+			tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
 
 	/* Figure out how many days since epoch */
 	days = remain / NUM_SECS_IN_DAY;
@@ -82,10 +82,12 @@ 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 */
-void rtc_get(struct rtc_time *tmp)
+int rtc_get(struct rtc_time *tmp)
 {
 	uint32_t cur_rtc_stat;
 	int time_in_sec;
@@ -95,9 +97,10 @@ void rtc_get(struct rtc_time *tmp)
 
 	if (tmp == NULL) {
 		puts("Error getting the date/time\n");
-		return;
+		return -1;
 	}
 
+	rtc_init();
 	wait_for_complete();
 
 	/* Read the RTC_STAT register */
@@ -112,6 +115,8 @@ void rtc_get(struct rtc_time *tmp)
 	/* Calculate the total number of seconds since epoch */
 	time_in_sec = (tm_sec) + MIN_TO_SECS(tm_min) + HRS_TO_SECS(tm_hr) + DAYS_TO_SECS(tm_day);
 	to_tm(time_in_sec, tmp);
+
+	return 0;
 }
 
 #endif