1.5 power management, input events, wakeup events

Paul Fox pgf at laptop.org
Wed Jun 24 15:08:10 EDT 2009

i was mildly surprised today in a conversation with chris ball
when he implied that the contents of our current (gen1)
/sys/power directory would probably be going away in 1.5.  or,
more specifically, he said that arch/x86/kernel/olpc-pm.c would
be going away, and that the wakeup_events and wakeup_source
mechanisms would be quite different.  principally, the plan is
apparently to rely on ACPI mechanisms where possible.

the input devices /dev/input/event[012] (which currently report
on power button, ebook, and lid events) are also implemented in
olpc-pm.c -- i'm not sure what their fate might be.

so:  i'm hoping someone (deepak?  chris?) can write up a sketch
of how they think power management, those input devices, wakeup
events, etc, will work on 1.5.  direct comparison to 1.0 would be
helpful.  (and of course a tie-in to specific work-to-be-done
and/or modules-to-be-written would be helpful too.)

 paul fox, pgf at laptop.org

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