[ts-7000] TS-7800, Cannot access the Hardware Clock via any known method.

["osogoet" <>]

I have been running kernel 2.6.34 from microSD on TS-7800, and everything goes 
well.
However, recently I encounter the problem of RTC.

While, it's OK for TS-7800 board with 'BOOTROM - built Jun 10 2009', 
the RTC of TS-7800 board with 'BOOTROM - built May 11 2011' is not recognized.

The related boot message is:

   Setting the system clock.
   Cannot access the Hardware Clock via any known method.
   Use the --debug option to see the details of our search for an access method.
   Unable to set System Clock to: Thu Jan 1 00:00:12 UTC 1970 (warning).

and the results of 'hwclock' and 'hwclock --debug' are:

   ts7800:~# hwclock
   Cannot access the Hardware Clock via any known method.
   Use the --debug option to see the details of our search for an access method.

   ts7800:~# hwclock --debug
   hwclock from util-linux-ng 2.13.1.1
   hwclock: Open of /dev/rtc failed, errno=2: No such file or directory.
   No usable clock interface found.
   Cannot access the Hardware Clock via any known method.

Also, there are /dev/rtc and /dev/rtc0 on TS-7800 board with 'BOOTROM - built 
Jun 10 2009',
there is neither /dev/rtc nor /dev/rtc0 on TS-7800 board with 'BOOTROM - built 
May 11 2011'.

How could it be fixed?



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