Thank you for the information.
--- 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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