Re: [PATCH 7/10 v6] PM / Domains: Don't stop wakeup devices during

On Fri, 1 Jul 2011, Rafael J. Wysocki wrote:

So the only way forward I can see is to add a special PM domain callback,
say .active_wakeup(), that will return "true" if the device is to be left
active if wakeup-enabled.  So the check you don't like will become
something like:

if (device_may_wakeup(dev) && genpd->active_wakeup
    && genpd->active_wakeup(dev))
        return 0;

Would that be better?

Another option, less flexible but perhaps easier to use, would be to 
set a couple of bitflags indicating whether the device needs power or 
clocks to handle wakeup signals.

Alan Stern