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PCI ACPI: Rework PCI handling of wake-up

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* 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: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki
2008-07-07 03:34:48 +02:00
committed by Jesse Barnes
parent 0af4b8c4fb
commit eb9d0fe40e
11 changed files with 208 additions and 116 deletions
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25
drivers/acpi/sleep/main.c
View File

@@ -468,6 +468,31 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
*d_min_p = d_min;
return d_max;
}
/**
* acpi_pm_device_sleep_wake - enable or disable the system wake-up
* capability of given device
* @dev: device to handle
* @enable: 'true' - enable, 'false' - disable the wake-up capability
*/
int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
{
acpi_handle handle;
struct acpi_device *adev;
if (!device_may_wakeup(dev))
return -EINVAL;
handle = DEVICE_ACPI_HANDLE(dev);
if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
printk(KERN_DEBUG "ACPI handle has no context!\n");
return -ENODEV;
}
return enable ?
acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
acpi_disable_wakeup_device_power(adev);
}
#endif
static void acpi_power_off_prepare(void)