Yes, it is an option, and I bought 8 TS-7800s with OP-BBRTC.
Please check the invoice #50491.
Also, the RTC works fine when booting from NAND Flash.
Well, I had compiled kernel of PC Linux many times, although I have not been
doing so for these a few(or several) years.
Then, if possible I will self-compile the 2.6.34 kernel on TS-7800, running
Linux 2.6.34.
And would you suggest where I do download source tree from?
BTW, the reason why I use kernel 2.6.34 (and GCC 4.3.2) is that accessing
PC-104 via mmap() requires EABI based on GCC 4.3.2 which runs on kernel 2.6.34.
--- In Walter Marvin <> wrote:
>
> I checked and a RTC is optional on the TS-7800 (e.g. you have to buy it
> extra) Check you original invoice and see if you have one installed
>
>
>
> ________________________________
> From: osogoet <>
> To:
> Sent: Thursday, August 25, 2011 10:24 AM
> Subject: [ts-7000] Re: TS-7800, Cannot access the Hardware Clock via any
> known method.
>
>
> Â
>
> 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 <mark@> 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 <mah01422@>
> > > *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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