diff options
author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-01-17 14:11:08 +0100 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-01-17 14:11:08 +0100 |
commit | ad0c3b0e4863185a9f8874a655a8d2999c915131 (patch) | |
tree | 972f8b80fe2890c393f8862f969ac0a4db704f7a /drivers/acpi | |
parent | ff0c41942fd9766a158502d8ed6965c8a7726f53 (diff) |
ACPI / PM: More visible function for retrieving device power states
The function used for retrieving ACPI device power states,
__acpi_bus_get_power(), is now static, because it is only used
internally in drivers/acpi/bus.c. However, it will be used
outside of that file going forward, so rename it to
acpi_device_get_power(), in analogy with acpi_device_set_power(),
add a kerneldoc comment to it and add its header to acpi_bus.h.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r-- | drivers/acpi/bus.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 8e57fc49726e..0e1441cc4d7f 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -200,7 +200,16 @@ static const char *state_string(int state) } } -static int __acpi_bus_get_power(struct acpi_device *device, int *state) +/** + * acpi_device_get_power - Get power state of an ACPI device. + * @device: Device to get the power state of. + * @state: Place to store the power state of the device. + * + * This function does not update the device's power.state field, but it may + * update its parent's power.state field (when the parent's power state is + * unknown and the device's power state turns out to be D0). + */ +int acpi_device_get_power(struct acpi_device *device, int *state) { int result = ACPI_STATE_UNKNOWN; @@ -397,7 +406,7 @@ int acpi_bus_init_power(struct acpi_device *device) device->power.state = ACPI_STATE_UNKNOWN; - result = __acpi_bus_get_power(device, &state); + result = acpi_device_get_power(device, &state); if (result) return result; @@ -421,7 +430,7 @@ int acpi_bus_update_power(acpi_handle handle, int *state_p) if (result) return result; - result = __acpi_bus_get_power(device, &state); + result = acpi_device_get_power(device, &state); if (result) return result; |