On Wednesday 22 July 2009, Arve Hjønnevåg wrote:

It would also be useful to mask an edge triggered interrupt until the
thread handler has finished. The touchscreen on the G1 is connected to
an edge triggered interrupt, and the touchscreen may toggle the
interrupt line while reading its registers.

To clarify:  if it does toggle, do you want that event to be
queued up so the IRQ is re-issued -- or not?  That "oneshot"
mechanism does some of that, though it's for level triggers.

Parts of that might be appropriate to handle in the threaded
IRQ handler itself.  It seems a bit device-specific.

- Dave