[Voyage-linux] GPIO on Soekris 4801-type systems

[mgrollman]

I currently use the Voyage 2.0 on a Soekris 4801, and it works very
well. Thanks, Voyage team!   I would like to begin to use the GPIO
inherent on the board.  I have found on this list a fair amount of data
on doing stuff with GPIO and WRAP, but not much on GPIO and Soekris.  On
the Soekris board, I was able to find information here:
http://dev.gentoo.org/~brix/papers/net4801/net4801.html#sect-kernel  and
here: http://ryanc.org/index.php?s=51, and in other spots as well, but
these sites tended to focus on BSD or Gentoo or on a generic
implementation, not on what the Voyage team was up to just now.

Couple of questions.

1. Do any of the stock (or custom) Voyage kernels have the appropriate
patches in places for GPIO on the Soekris (Jim Cromie has written what
seems to well known discussed
here:http://article.gmane.org/gmane.linux.kernel/416341, but there
appear to be several out there) ?  I note on boot that my 2.6.15  kernel
says "scx200: GPIO base 0x6100" but I am not sure what if any GPIO
driver this is, and if it is indeed fully enabled?

2. If so, which kernel(s) to choose, assuming 2.5.15 or better is desired?

3. If not, which is the best patch set to use and how best to apply it
to one of the current voyage kernels?  Any gotchas?

4. Are these patches needed to make use of the lmsensors module on the
Soekris, or support here as far as voyage goes limited to WRAP hardware?

5. ... and what other advice can anyone offer from userland for
combining Voyage, Soekris, and GPIO?

Any advice is greatly appreciated.

Cheers,

- Michael