On Mon, 18 Jan 2010, Neil Jerram wrote: > One more possible issue with this kernel. The boot messages always say > > [21474539.530000] pcf50633-rtc pcf50633-rtc: hctosys: unable to read > the hardware clock
I'm seeing this on my build from a recent git pull as well. It also has the unpleasant side effect of also failing to set the time on resume so the clock seems to lose time during any suspend. :-( I finally looked into it, and this is the problem (with RTC debugging enabled): [21474537.860000] pcf50606-rtc pcf50606-rtc: PCF_TIME: 24.00.10 06:26:41 [21474537.860000] pcf50606-rtc pcf50606-rtc: RTC_TIME: 24.4294967295.110 6:26:41 [21474537.860000] pcf50606-rtc pcf50606-rtc: hctosys: unable to read the hardware clock That month fails rtc_valid_tm(), leading to the EINVAL. The commit/fix Werner made last April seems to be not interacting well with the zero-based month count in the pcf50606 RTC (set, in my case, by an old kernel I booted at some point in January): diff --git a/drivers/rtc/rtc-pcf50606.c b/drivers/rtc/rtc-pcf50606.c index e059093..434cfc1 100644 (file) --- a/drivers/rtc/rtc-pcf50606.c +++ b/drivers/rtc/rtc-pcf50606.c @@ -70,7 +70,7 @@ static void pcf2rtc_time(struct rtc_time *rtc, struct pcf50606_time *pcf) rtc->tm_hour = bcd2bin(pcf->time[PCF50606_TI_HOUR]); rtc->tm_wday = bcd2bin(pcf->time[PCF50606_TI_WKDAY]); rtc->tm_mday = bcd2bin(pcf->time[PCF50606_TI_DAY]); - rtc->tm_mon = bcd2bin(pcf->time[PCF50606_TI_MONTH]); + rtc->tm_mon = bcd2bin(pcf->time[PCF50606_TI_MONTH]) - 1; rtc->tm_year = bcd2bin(pcf->time[PCF50606_TI_YEAR]) + 100; } Since hwclock does a read before a write of the RTC, we can't fix this as easily as one might think. I guess in another 7 days it will be working again. :-) I was able to escape the catch-22 by booting an old kernel, setting the RTC to a date in February 2010 with hwclock and then booting the new kernel again. -Andy It ain't what you don't know that gets you into trouble. It's what you know for sure that just ain't so. - Mark Twain _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community