EC SCI model?

[Nate Lawson <nate-Y6VGUYTwhu0@public.gmane.org>]

I am a FreeBSD developer but this is a more general question with ACPI.  I
looked through the spec (especially 13 Embedded Controller) and I have a
question regarding the IBF/OBF stuff.  Testing has shown that I get
multiple callbacks of my EcGpeHandler() routine even when IBF and OBF have
not changed.  Isn't the GPE only supposed to trigger when they change (and
only once)?  I've gotten more reliability by waiting for the GPE, checking
the status and if it isn't what I'm waiting for, go back to sleep.

Also, what is the procedure for sleeping while holding the ACPI Global
Lock?  I need to sleep while waiting for the GPE to trigger between each
phase of read and write (i.e. command, address, data).  I'm not using
burst mode but may consider implementing it to make this easier and avoid
the sleep altogether.

Thanks,
-Nate


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