• Rafael J. Wysocki's avatar
    ACPI / PM: Use device wakeup flags for handling ACPI wakeup devices · f2b56bc8
    Rafael J. Wysocki authored
    There are ACPI devices (buttons and the laptop lid) that can wake up
    the system from sleep states and have no "physical" companion
    devices.  The ACPI subsystem uses two flags, wakeup.state.enabled and
    wakeup.flags.always_enabled, for handling those devices, but they
    are not accessible through the standard device wakeup infrastructure.
    User space can only control them via the /proc/acpi/wakeup interface
    that is not really convenient (e.g. the way in which devices are
    enabled to wake up the system is not portable between different
    systems, because it requires one to know the devices' "names" used in
    the system's ACPI tables).
    
    To address this problem, use standard device wakeup flags instead of
    the special ACPI flags for handling those devices.  In particular,
    use device_set_wakeup_capable() to mark the ACPI wakeup devices
    during initialization and use device_set_wakeup_enable() to allow
    or disallow them to wake up the system from sleep states.  Rework
    the /proc/acpi/wakeup interface to take these changes into account.
    Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
    Signed-off-by: default avatarLen Brown <len.brown@intel.com>
    f2b56bc8
proc.c 10.7 KB