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LWMON5: POST RTC fix

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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>
This commit is contained in:
Yuri Tikhonov
2008-03-20 17:56:04 +03:00
committed by Wolfgang Denk
parent 23e20aa648
commit b73a19e160
34 changed files with 146 additions and 45 deletions
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17
drivers/rtc/rx8025.c
View File

@@ -96,8 +96,9 @@ static unsigned bcd2bin (uchar c);
/*
* Get the current time from the RTC
*/
void rtc_get (struct rtc_time *tmp)
int rtc_get (struct rtc_time *tmp)
{
int rel = 0;
uchar sec, min, hour, mday, wday, mon, year, ctl2;
uchar buf[16];
@@ -118,14 +119,20 @@ void rtc_get (struct rtc_time *tmp)
/* dump status */
ctl2 = rtc_read(RTC_CTL2_REG_ADDR);
if (ctl2 & RTC_CTL2_BIT_PON)
if (ctl2 & RTC_CTL2_BIT_PON) {
printf("RTC: power-on detected\n");
rel = -1;
}
if (ctl2 & RTC_CTL2_BIT_VDET)
if (ctl2 & RTC_CTL2_BIT_VDET) {
printf("RTC: voltage drop detected\n");
rel = -1;
}
if (!(ctl2 & RTC_CTL2_BIT_XST))
if (!(ctl2 & RTC_CTL2_BIT_XST)) {
printf("RTC: oscillator stop detected\n");
rel = -1;
}
tmp->tm_sec = bcd2bin (sec & 0x7F);
tmp->tm_min = bcd2bin (min & 0x7F);
@@ -140,6 +147,8 @@ void rtc_get (struct rtc_time *tmp)
DEBUGR ("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;
}
/*