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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2008-07-07 03:30:55 +0200 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2008-07-07 16:25:02 -0700 |
| commit | 3737b2b1046900660b42e25c904b85e78139d25b (patch) | |
| tree | a03ba67b061c44eddca14073e5317b1eb4fc1431 | |
| parent | c6c4f070a61b2b6e5cd317a5fbf25255878688a2 (diff) | |
| download | kernel-crypto-3737b2b1046900660b42e25c904b85e78139d25b.tar.gz kernel-crypto-3737b2b1046900660b42e25c904b85e78139d25b.tar.xz kernel-crypto-3737b2b1046900660b42e25c904b85e78139d25b.zip | |
ACPI: Introduce acpi_bus_power_manageable function
Introduce function acpi_bus_power_manageable() allowing other
(dependent) subsystems to check if ACPI is able to power manage given
device. This may be useful, for example, for PCI device power
management.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| -rw-r--r-- | drivers/acpi/bus.c | 11 | ||||
| -rw-r--r-- | include/acpi/acpi_bus.h | 1 |
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index a6dbcf4d9ef..b9b69d9629b 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -295,6 +295,17 @@ int acpi_bus_set_power(acpi_handle handle, int state) EXPORT_SYMBOL(acpi_bus_set_power); +bool acpi_bus_power_manageable(acpi_handle handle) +{ + struct acpi_device *device; + int result; + + result = acpi_bus_get_device(handle, &device); + return result ? false : device->flags.power_manageable; +} + +EXPORT_SYMBOL(acpi_bus_power_manageable); + /* -------------------------------------------------------------------------- Event Management -------------------------------------------------------------------------- */ diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index db90a74f871..0c21ea3bb67 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -335,6 +335,7 @@ void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context); 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); +bool acpi_bus_power_manageable(acpi_handle handle); #ifdef CONFIG_ACPI_PROC_EVENT int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data); int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data); |