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ACPI / PM: Add more run-time wake-up fields

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Use the run_wake flag to mark all devices for which run-time wake-up
events may be generated by the platform.  Introduce a new wake-up
flag, always_enabled, for marking devices that should be permanently
enabled to generate run-time events.  Also, introduce a reference
counter for run-wake devices and a function that will initialize all
of the run-time wake-up fields for given device.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki
2010-02-17 23:41:49 +01:00
committed by Jesse Barnes
parent 9630bdd9b1
commit f517709d65
4 changed files with 33 additions and 11 deletions
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37
drivers/acpi/scan.c
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@@ -741,19 +741,39 @@ acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device,
return AE_OK;
}
static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
{
acpi_status status = 0;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *package = NULL;
int psw_error;
struct acpi_device_id button_device_ids[] = {
{"PNP0C0D", 0},
{"PNP0C0C", 0},
{"PNP0C0E", 0},
{"", 0},
};
acpi_status status;
acpi_event_status event_status;
device->wakeup.run_wake_count = 0;
/* Power button, Lid switch always enable wakeup */
if (!acpi_match_device_ids(device, button_device_ids)) {
device->wakeup.flags.run_wake = 1;
device->wakeup.flags.always_enabled = 1;
return;
}
status = acpi_get_gpe_status(NULL, device->wakeup.gpe_number,
ACPI_NOT_ISR, &event_status);
if (status == AE_OK)
device->wakeup.flags.run_wake =
!!(event_status & ACPI_EVENT_FLAG_HANDLE);
}
static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
{
acpi_status status = 0;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *package = NULL;
int psw_error;
/* _PRW */
status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
@@ -773,6 +793,7 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
device->wakeup.flags.valid = 1;
device->wakeup.prepare_count = 0;
acpi_bus_set_run_wake_flags(device);
/* Call _PSW/_DSW object to disable its ability to wake the sleeping
* system for the ACPI device with the _PRW object.
* The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW.
@@ -784,10 +805,6 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"error in _DSW or _PSW evaluation\n"));
/* Power button, Lid switch always enable wakeup */
if (!acpi_match_device_ids(device, button_device_ids))
device->wakeup.flags.run_wake = 1;
end:
if (ACPI_FAILURE(status))
device->flags.wake_capable = 0;