Commit ad0c3b0e authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

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: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent ff0c4194

drivers/acpi/bus.c

+12 −3
Original line number Diff line number Diff line
@@ -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;

include/acpi/acpi_bus.h

+1 −0
Original line number Diff line number Diff line
@@ -331,6 +331,7 @@ acpi_status acpi_bus_get_status_handle(acpi_handle handle, 
				       unsigned long long *sta);

int acpi_bus_get_status(struct acpi_device *device);

int acpi_bus_set_power(acpi_handle handle, int state);

int acpi_device_get_power(struct acpi_device *device, int *state);

int acpi_device_set_power(struct acpi_device *device, int state);

int acpi_bus_update_power(acpi_handle handle, int *state_p);

bool acpi_bus_power_manageable(acpi_handle handle);

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