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Re: [ts-7000] Re: TS-7800 serial and RTC at boot

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Subject: Re: [ts-7000] Re: TS-7800 serial and RTC at boot
From: Michael Schmidt <>
Date: Tue, 03 Jun 2008 13:45:36 -0700
Anouk Ahamitet wrote:
> but my question about 
> activating the serial ports still remains...

I missed that part of the question, sorry...

There are two places the serial drivers can be loaded - where they get 
loaded will depend on whether you need them in the fastboot environment 
or not.

You should be able to modprobe the tsuart7800 driver as soon as the 
debian partition is mounted read-only; or you could copy the drivers to 
the initrd if you wanted them loaded before that.

As for loading the modules as part of the full boot, they should go in 
the standard Debian locations.  The startup scripts are in /etc/init.d 
and get linked from /etc/rcS.d, rc3.d etc.



>  
>  > The most foolproof way to do this after logging in (full debian boot) 
> is probably this:
>  > # touch /tsfastboot
>  > # touch /fastboot
>  > # reboot
> 
> That brings up a minor problem with our board.  It always seems to hang 
> when it tries to reboot itself.  It gets as far as writing
> 
> Reseting...
> 
> to the console, then a minute or two later, it says that restart failed, 
> system halted.  Hopefully this is only a problem with the particular 
> board we were sent (we received it on Monday, this week) because that 
> would be very bad for our embedded project.

It definitely is not normal for the reboot to fail.  You might try the 
"-f" option to reboot and see if you see the same behavior.   I would 
RMA the board for repair with a note that reboot is failing as we can 
look into why this is happening.


> Thank you for the answer.
> 
> 
> I also have a general comment for the documentation and release note 
> writers.  Hopefully you can pass this along:
>
> Our 7800 didn't come with any manuals or disks, and when I downloaded 
> the TS-7800 version of the one that was most useful for the TS-7250, I 
> discovered that it was actually for the TS-7250.  Apparently there's no 
> manual for the TS-7800 yet (except for the preliminary pamphlet) and the 
> "Linux for ARM on TS-72XX User's Guide" isn't re ally applicable to the 
> TS-7800 (the RedBoot pages don't apply and the addresses are wrong, 
> etc.).  Some notes for folks moving from the 7250 to the 7800 would have 
> been a HUGE help.  For example, things like using rtc7800 instead of 
> hwclock, necessity of /activating/ the PC104 bus before use, the fact 
> that (a) the serial ports on the 7800 don't seem to exist until 
> 'modprobe tsuart7800' is run, and then the devices created by that 
> command ARE NOT the serial port names:  instead the standard /dev/ttySn 
> names work on the 7800 (where they don't on the 7250).

I will pass your comments along.


  ______   Best Regards,
|__  __/                  Michael Schmidt
    ||                   Software Engineer
    ||echnologic Systems (EmbeddedARM.com)
    || (480)    16610 East Laser Drive #10
    |/ 837-5200   Fountain Hills, AZ 85268
        http://oz.embeddedarm.com/~michael

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