[Soekris] sc1100 TSC bug

[Ted Phelps]

dzpost at dedekind.net writes:
> I'm confused about the status of the sc1100 TSC timer bug and its
> workaround.  I just installed linux on my new net4801, with a standard
> 2.6.18 kernel which I built for the purpose.  Based on what I'd read,
> I configured scx200_hrt module so it would use the high resolution
> timer as clock source instead of the TSC.

You need to configure your device to use the 27MHz time source.  The
following should be enabled in the kernel menu configuration:

  Bus Options/NatSemi SCx200 support	             (CONFIG_SCx200)
  NatSemi SCx200 27MHz High-Resolution Timer Support (CONFIG_SCx200HR_TIMER)

I believe that the Linux will automatically detect this timer and use it
at boot time, but I haven't tried it yet (I'm trying to trace a PPPoE
bug that happens roughly once a month so I haven't been in a position to
reboot).

Hope that helps,
-Ted