• Rafael J. Wysocki's avatar
    PCI ACPI: Rework PCI handling of wake-up · eb9d0fe4
    Rafael J. Wysocki authored
    * Introduce function acpi_pm_device_sleep_wake() for enabling and
      disabling the system wake-up capability of devices that are power
      manageable by ACPI.
    
    * Introduce function acpi_bus_can_wakeup() allowing other (dependent)
      subsystems to check if ACPI is able to enable the system wake-up
      capability of given device.
    
    * Introduce callback .sleep_wake() in struct pci_platform_pm_ops and
      for the ACPI PCI 'driver' make it use acpi_pm_device_sleep_wake().
    
    * Introduce callback .can_wakeup() in struct pci_platform_pm_ops and
      for the ACPI 'driver' make it use acpi_bus_can_wakeup().
    
    * Move the PME# handlig code out of pci_enable_wake() and split it
      into two functions, pci_pme_capable() and pci_pme_active(),
      allowing the caller to check if given device is capable of
      generating PME# from given power state and to enable/disable the
      device's PME# functionality, respectively.
    
    * Modify pci_enable_wake() to use the new ACPI callbacks and the new
      PME#-related functions.
    
    * Drop the generic .platform_enable_wakeup() callback that is not
      used any more.
    
    * Introduce device_set_wakeup_capable() that will set the
      power.can_wakeup flag of given device.
    
    * Rework PCI device PM initialization so that, if given device is
      capable of generating wake-up events, either natively through the
      PME# mechanism, or with the help of the platform, its
      power.can_wakeup flag is set and its power.should_wakeup flag is
      unset as appropriate.
    
    * Make ACPI set the power.can_wakeup flag for devices found to be
      wake-up capable by it.
    
    * Make the ACPI wake-up code enable/disable GPEs for devices that
      have the wakeup.flags.prepared flag set (which means that their
      wake-up power has been enabled).
    Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
    Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
    eb9d0fe4
sysfs.c 2.91 KB