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authorRafael J. Wysocki <rjw@sisk.pl>2010-11-25 02:09:15 +0300
committerLen Brown <len.brown@intel.com>2011-01-12 12:48:45 +0300
commit25eed40720fc9005c63a1f436e5f8a78836c26ff (patch)
tree2c927e50d57c2e456d9ceaa575c1bb774627ee10 /include/acpi
parentade3e7fef794781c0798d0cf0f046123842ba550 (diff)
downloadlinux-25eed40720fc9005c63a1f436e5f8a78836c26ff.tar.xz
ACPI / PM: Add function for updating device power state consistently
Add function acpi_bus_update_power() for reading the actual power state of an ACPI device and updating its device->power.state field in such a way that its power resources' reference counters will remain consistent with that field. For this purpose introduce __acpi_bus_set_power() setting the power state of an ACPI device without updating its device->power.state field and make acpi_bus_set_power() and acpi_bus_update_power() use it (acpi_bus_set_power() retains the current behavior for now). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/acpi')
-rw-r--r--include/acpi/acpi_bus.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 359ef11725a6..5d2c4c540063 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -330,6 +330,7 @@ acpi_status acpi_bus_get_status_handle(acpi_handle handle,
int acpi_bus_get_status(struct acpi_device *device);
int acpi_bus_get_power(acpi_handle handle, int *state);
int acpi_bus_set_power(acpi_handle handle, int state);
+int acpi_bus_update_power(acpi_handle handle, int *state_p);
bool acpi_bus_power_manageable(acpi_handle handle);
bool acpi_bus_can_wakeup(acpi_handle handle);
#ifdef CONFIG_ACPI_PROC_EVENT