diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2010-11-25 02:06:55 +0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2011-01-12 12:48:44 +0300 |
| commit | 30d3df41b32b1ea63d3ebc52ef5644cbe41520f4 (patch) | |
| tree | 8daf2d042493644776179dc75170c34dca68f743 /drivers | |
| parent | d2ef555b57292cd818934636ac8e3414cc2a6762 (diff) | |
| download | linux-30d3df41b32b1ea63d3ebc52ef5644cbe41520f4.tar.xz | |
ACPI / PM: Introduce function for refcounting device power resources
Introduce function acpi_power_on_resources() that reference counts
and possibly turns on ACPI power resources for a given device and
a given power state of it.
This function will be used for reference counting device power
resources during initialization.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/internal.h | 1 | ||||
| -rw-r--r-- | drivers/acpi/power.c | 8 |
2 files changed, 9 insertions, 0 deletions
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index 2cc01489dccf..433a8ee8ac2c 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -42,6 +42,7 @@ int acpi_power_init(void); 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); +int acpi_power_on_resources(struct acpi_device *device, int state); int acpi_power_transition(struct acpi_device *device, int state); extern int acpi_power_nocheck; diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c index 95fedbdf4fb8..0cb4eab50d73 100644 --- a/drivers/acpi/power.c +++ b/drivers/acpi/power.c @@ -485,6 +485,14 @@ int acpi_power_get_inferred_state(struct acpi_device *device, int *state) return 0; } +int acpi_power_on_resources(struct acpi_device *device, int state) +{ + if (!device || state < ACPI_STATE_D0 || state > ACPI_STATE_D3) + return -EINVAL; + + return acpi_power_on_list(&device->power.states[state].resources); +} + int acpi_power_transition(struct acpi_device *device, int state) { int result; |