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

["osogoet" <>]

I downloaded 7800_avr_reflash.tar.gz, and following the README, execute 
./refresh script.
However, kernel 2.6.34 could still not find the RTC.

I got the file system of 2.6.34 somewhere.  It was only a few months ago, but I 
can't remember where I got the image from, or what did I do to setup micorSD.

Well, should I make/compile the 2.6.34 kernel from sources?
But, I am not so smart to do so.

So, I would like to reflash the AVR on 7800 with the older image, unless the 
bug in 
the older AVR image is serious.

Would you supply the older 7800_avr flash image?

Regards,

--- In  Mark Featherston <> wrote:
>
> Is this a new TS-7800, or did you recently update the AVR following the 
> errata here?
> http://www.embeddedarm.com/about/resource.php?item=563
> 
> Walter is correct that it is optional, so make sure you ordered with 
> OP-BBRTC. However there was a recently discovered bug with the 2.6.34 
> kernel and the latest FPGA revision.  From 
> /arch/arm/mach-orion5x/ts78xx-setup.c:
> 
> static void ts78xx_fpga_supports(void)
> {
>          /* TODO: put this 'table' into ts78xx-fpga.h */
>          switch (ts78xx_fpga.id) {
>          case TS7800_REV_1:
>          case TS7800_REV_2:
>          case TS7800_REV_3:
>          case TS7800_REV_4:
>          case TS7800_REV_5:
>          case TS7800_REV_9:
>                  ts78xx_fpga.supports.ts_rtc.present = 1;
>                  ts78xx_fpga.supports.ts_nand.present = 1;
>                  ts78xx_fpga.supports.ts_rng.present = 1;
> 
>                  break;
>          default:
>                  ts78xx_fpga.supports.ts_rtc.present = 0;
>                  ts78xx_fpga.supports.ts_nand.present = 0;
>                  ts78xx_fpga.supports.ts_rng.present = 0;
> 
>          }
> }
> 
> If you have a new board, or applied the AVR update, you will be running 
> revision 10.  As you can see there, it will assume there is no RTC, 
> NAND, or RNG.  We only officially support the 2.6.21 kernel, but a 
> simple change would be to make the defaults assume presence of the RTC 
> when it doesn't recognize the revision.  Once it is working you can just 
> use hwclock to interface with the RTC.
> 
> Keep in mind this board does have support in the vanilla kernels from 
> kernel.org.  A fix was already submitted:
> https://lkml.org/lkml/2011/3/4/223
> 
> Best Regards,
> ________________________________________________________________
>   Mark Featherston, Technologic Systems | voice: (480) 837-5200
>   16525 East Laser Drive                | fax: (480) 837-5300
>   Fountain Hills, AZ 85268              | web: www.embeddedARM.com
> 
> On 08/24/2011 04:11 PM, Walter Marvin wrote:
> > First check you have a RTC. on the 7500 it is optional.
> >
> > ------------------------------------------------------------------------
> > *From:* osogoet <>
> > *To:* 
> > *Sent:* Wednesday, August 24, 2011 1:23 PM
> > *Subject:* [ts-7000] TS-7800, Cannot access the Hardware Clock via any
> > known method.
> >
> > 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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