path: root/drivers/acpi/internal.h
diff options
authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-01-17 14:11:07 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-01-17 14:11:07 +0100
commit0596a52b8357b25185e06af32973225baeb7196a (patch)
tree90d1d8572a390c47109bf2fe8da545a60f2f1032 /drivers/acpi/internal.h
parente88c9c603b2ad0cd0fbe90afedba3f1becbbeb79 (diff)
ACPI: Use system level attribute of wakeup power resources
The system level attribute of ACPI power resources is the lowest system sleep level (S0, S2 etc.) in which the given resource can be "on" (ACPI 5.0, Section 7.1). On the other hand, wakeup power resources have to be "on" for devices depending on them to be able to signal wakeup. Therefore devices cannot wake up the system from sleep states higher than the minimum of the system level attributes of their wakeup power resources. Use the wakeup power resources' system level values to get the deepest system sleep state (highest system sleep level) the given device can wake up the system from. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/internal.h')
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 8a6c67c9da42..07f61dbd8136 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -55,6 +55,7 @@ int acpi_extract_power_resources(union acpi_object *package, unsigned int start,
struct list_head *list);
int acpi_add_power_resource(acpi_handle handle);
void acpi_power_add_remove_device(struct acpi_device *adev, bool add);
+int acpi_power_min_system_level(struct list_head *list);
int acpi_device_sleep_wake(struct acpi_device *dev,
int enable, int sleep_state, int dev_state);
int acpi_power_get_inferred_state(struct acpi_device *device, int *state);