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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
Download patch file Download diff file Expand all files Collapse all files

15
post/drivers/rtc.c
View file

@ -28,6 +28,8 @@
*
* The Real Time Clock (RTC) operation is verified by this test.
* The following features are verified:
* o) RTC Power Fault
* This is verified by analyzing the rtc_get() return status.
* o) Time uniformity
* This is verified by reading RTC in polling within
* a short period of time.
@ -96,6 +98,10 @@ int rtc_post_test (int flags)
unsigned int ynl = 1999;
unsigned int yl = 2000;
unsigned int skipped = 0;
int reliable;
/* Time reliability */
reliable = rtc_get (&svtm);
/* Time uniformity */
if (rtc_post_skip (&diff) != 0) {
@ -176,6 +182,15 @@ int rtc_post_test (int flags)
}
rtc_post_restore (&svtm, skipped);
/* If come here, then RTC operates correcty, check the correctness
* of the time it reports.
*/
if (reliable < 0) {
post_log ("RTC Time is not reliable! Power fault? \n");
return -1;
}
return 0;
}