commit 9bacd94758cc0d0e9757daa24d3ffd4e690de47b
author Yuri Tikhonov <yur@emcraft.com> Thu Mar 20 17:56:04 2008 +0300
committer Wolfgang Denk <wd@denx.de> Thu Mar 20 21:48:46 2008 +0100
tree 4f6752b24fe118da445233479396497d516a1e50
parent 0418e415e20bcc9bb86c9f52574ee1df439472b9

LWMON5: POST RTC fix

Modify the RTC API to provide one a status for the time reported by
the rtc_get() function:
  0 - a reliable time is guaranteed,
< 0 - a reliable time isn't guaranteed (power fault, clock issues,
      and so on).

The RTC chip drivers are responsible for providing this info if the
corresponding chip supports such functionality. If not - always
report that the time is reliable.

The POST RTC test was modified to detect the RTC faults utilizing
this new rtc_get() feature.

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

drivers/rtc/m41t11.c

diff --git a/drivers/rtc/m41t11.c b/drivers/rtc/m41t11.c
index 81da33a..fce00d9 100644
--- a/drivers/rtc/m41t11.c
+++ b/drivers/rtc/m41t11.c
@@ -96,14 +96,16 @@
 
 #define M41T11_STORAGE_SZ  (64-REG_CNT)
 
-void rtc_get (struct rtc_time *tmp)
+int rtc_get (struct rtc_time *tmp)
 {
+	int rel = 0;
 	uchar data[RTC_REG_CNT];
 
 	i2c_read(CFG_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, data, RTC_REG_CNT);
 
 	if( data[RTC_SEC_ADDR] & 0x80 ){
 		printf( "m41t11 RTC Clock stopped!!!\n" );
+		rel = -1;
 	}
 	tmp->tm_sec  = bcd2bin (data[RTC_SEC_ADDR]  & 0x7F);
 	tmp->tm_min  = bcd2bin (data[RTC_MIN_ADDR]  & 0x7F);
@@ -120,6 +122,7 @@
 		i2c_read(CFG_I2C_RTC_ADDR, M41T11_YEAR_DATA, 1, &cent, M41T11_YEAR_SIZE);
 		if( !(data[RTC_HOUR_ADDR] & 0x80) ){
 			printf( "m41t11 RTC: cann't keep track of years without CEB set\n" );
+			rel = -1;
 		}
 		if( (cent & 0x1) != ((data[RTC_HOUR_ADDR]&0x40)>>7) ){
 			/*century flip store off new year*/
@@ -136,6 +139,8 @@
 	debug ( "Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
 		tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
 		tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
+
+	return rel;
 }
 
 void rtc_set (struct rtc_time *tmp)