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    SubjectRe: [PATCH 7/10 v6] PM / Domains: Don't stop wakeup devices during system sleep transitions
    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

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