audio crack fix, hardware questions

Hello,

I'm happy I pinpointed te audio crack on screentouch bug: it's due to a direct
mixer access on the main volume. I was trying to reproduce it before with opie
restart, and I finally found a faster method:

Try that :
power on, touch screen - it cracks - suspend
unsuspend, touch screen - it doesn't crack, open mixer app, change main volume -
it cracks - suspend
unsuspend, touch screen - it doesn't crack, open mixer app, change mic volume,
touch screen - it doesn't crack, change main volume, touch screen it still
doesn't crack

I think on opie startup, the main volume is set by some application - this cause
the initial crack. A suspend with cause some default values to be written back
into ucb1x00 fixing the bug which will only reappear if the main volume is
changed again.

After reading ubc1x00-audio.c, I think it comes from the mask line #99. In the
worst case, reading the current mic volume and  setting it to that value before
setting the main volume should be a good workaround  Of course changing 0xff00
to the correct value would be better.  Maybe someone with the datasheet could
help?
UPDATE: Chris just told me the bug didn't happen with X11 image so it may be an
opie bug

Now many questions:

1) leds
I'd like to know how to call the leds from a user application (ex: make charging
led blink if a new email is received). A sample hello world application with
that feature would be great - all I could find was
opensimpad/build/linux-2.4.19/arch/arm/mach-sa1100/leds-simpad.c about the green
led.

2) power button
How should I proceed to map the power button to a suspend event? I'm thinking of
a daemon which would monitor gpio0 and echo > /proc/pm/sys/suspend
It could save some time instead of going to menu/suspend. I'm strarting to hack
a solution based on http://www.mn-logistik.de/unsupported/pxa250/gpio.c but any
cleanest code or suggestion is welcome.

4) smartcard tda8007 driver
Is it safe to try the code? I've got several smartcards I'd like to play with
:-)

5) kernel 2.6
what's missing? How can I help?

Bien a vous - Best regards,
Guylhem


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