ACPI / PM: Add function for device power state initialization (ade3e7fe) · Commits · 戴 / test

drivers/acpi/bus.c

+25 −0

Original line number	Diff line number	Diff line
		@@ -364,6 +364,31 @@ int acpi_bus_set_power(acpi_handle handle, int state)

		EXPORT_SYMBOL(acpi_bus_set_power);


		int acpi_bus_init_power(struct acpi_device *device)
		{
		int state;
		int result;

		if (!device)
		return -EINVAL;

		device->power.state = ACPI_STATE_UNKNOWN;

		result = __acpi_bus_get_power(device, &state);
		if (result)
		return result;

		if (device->power.flags.power_resources)
		result = acpi_power_on_resources(device, state);

		if (!result)
		device->power.state = state;

		return result;
		}


		bool acpi_bus_power_manageable(acpi_handle handle)
		{
		struct acpi_device *device;

+1 −0

Original line number	Diff line number	Diff line
		@@ -44,6 +44,7 @@ int acpi_device_sleep_wake(struct acpi_device *dev,
		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);
		int acpi_bus_init_power(struct acpi_device *device);
		extern int acpi_power_nocheck;

		int acpi_wakeup_device_init(void);

+1 −4

Original line number	Diff line number	Diff line
		@@ -901,10 +901,7 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
		device->power.states[ACPI_STATE_D3].flags.valid = 1;
		device->power.states[ACPI_STATE_D3].power = 0;

		/* TBD: System wake support and resource requirements. */

		device->power.state = ACPI_STATE_UNKNOWN;
		acpi_bus_get_power(device->handle, &(device->power.state));
		acpi_bus_init_power(device);

		return 0;
		}