diff options
| author | Yuri Tikhonov | 2008-03-20 17:56:04 +0300 |
|---|---|---|
| committer | Wolfgang Denk | 2008-03-20 21:48:46 +0100 |
| commit | b73a19e1609d0f705cbab8014ca17aefe89e4c76 (patch) | |
| tree | 4f6752b24fe118da445233479396497d516a1e50 /drivers/rtc/m41t11.c | |
| parent | 23e20aa6488e6c0622496549861bfdc74108debe (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.c | 7 |
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, ¢, 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) |