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authorYuri Tikhonov2008-03-20 17:56:04 +0300
committerWolfgang Denk2008-03-20 21:48:46 +0100
commitb73a19e1609d0f705cbab8014ca17aefe89e4c76 (patch)
tree4f6752b24fe118da445233479396497d516a1e50 /drivers/rtc/m41t11.c
parent23e20aa6488e6c0622496549861bfdc74108debe (diff)
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>
Diffstat (limited to 'drivers/rtc/m41t11.c')
-rw-r--r--drivers/rtc/m41t11.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/rtc/m41t11.c b/drivers/rtc/m41t11.c
index 81da33a31e1..fce00d93539 100644
--- a/drivers/rtc/m41t11.c
+++ b/drivers/rtc/m41t11.c
@@ -96,14 +96,16 @@ static unsigned char bin2bcd (unsigned int n)
#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 @@ void rtc_get (struct rtc_time *tmp)
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 @@ void rtc_get (struct rtc_time *tmp)
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)