Sharp CE-RH2 remote kernel driver

(cross-posted to oz-dev and kernel-discuss)

I finally got another hint and have a working kernel driver for the
CE-RH2 in-line audio remote. It outputs the correct keys. Both xev and
showkey only show 3 of the keys, the other 4 show some strange output.
However, gizmod (compiled on the Z due to cross-compile problems) sees
all 7 keys just fine and some quick hacking has it controlling mpd for
me (although volume control is still complicated).

The patch is here:
http://oe.reversefold.com/sharpsl-rc/sharpsl-rc.patch

There are still some issues with it, of course, it was pretty much
copied from the 2.4 kernel and will need some fix-ups to be merged
upstream but I'm willing to work on it if I can get some pointers.

There is a problem with the IRQ handling as well as I see this in dmesg:
enable_irq(45) unbalanced from bf1483e0

Any help in making this patch better would be appreciated.

-- 
Justin Patrin