36 const char *acpi_power_state_string(int state)  in acpi_power_state_string()  argument
38 	switch (state) {  in acpi_power_state_string()
63 int acpi_device_get_power(struct acpi_device *device, int *state)  in acpi_device_get_power()  argument
67 	if (!device || !state)  in acpi_device_get_power()
72 		*state = device->parent ?  in acpi_device_get_power()
73 			device->parent->power.state : ACPI_STATE_D0;  in acpi_device_get_power()
115 	    && device->parent->power.state == ACPI_STATE_UNKNOWN  in acpi_device_get_power()
117 		device->parent->power.state = ACPI_STATE_D0;  in acpi_device_get_power()
119 	*state = result;  in acpi_device_get_power()
123 			  device->pnp.bus_id, acpi_power_state_string(*state)));  in acpi_device_get_power()
128 static int acpi_dev_pm_explicit_set(struct acpi_device *adev, int state)  in acpi_dev_pm_explicit_set()  argument
130 	if (adev->power.states[state].flags.explicit_set) {  in acpi_dev_pm_explicit_set()
131 		char method[5] = { '_', 'P', 'S', '0' + state, '\0' };  in acpi_dev_pm_explicit_set()
149 int acpi_device_set_power(struct acpi_device *device, int state)  in acpi_device_set_power()  argument
151 	int target_state = state;  in acpi_device_set_power()
155 	    || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))  in acpi_device_set_power()
160 	if (state == device->power.state) {  in acpi_device_set_power()
163 				  acpi_power_state_string(state)));  in acpi_device_set_power()
167 	if (state == ACPI_STATE_D3_COLD) {  in acpi_device_set_power()
172 		state = ACPI_STATE_D3_HOT;  in acpi_device_set_power()
175 			target_state = state;  in acpi_device_set_power()
176 	} else if (!device->power.states[state].flags.valid) {  in acpi_device_set_power()
178 			 acpi_power_state_string(state));  in acpi_device_set_power()
183 	    device->parent && (state < device->parent->power.state)) {  in acpi_device_set_power()
186 			 acpi_power_state_string(state),  in acpi_device_set_power()
187 			 acpi_power_state_string(device->parent->power.state));  in acpi_device_set_power()
198 	if (state > ACPI_STATE_D0) {  in acpi_device_set_power()
203 		if (state < device->power.state) {  in acpi_device_set_power()
205 				 acpi_power_state_string(device->power.state),  in acpi_device_set_power()
206 				 acpi_power_state_string(state));  in acpi_device_set_power()
210 		result = acpi_dev_pm_explicit_set(device, state);  in acpi_device_set_power()
228 			 acpi_power_state_string(state));  in acpi_device_set_power()
230 		device->power.state = target_state;  in acpi_device_set_power()
234 				  acpi_power_state_string(state)));  in acpi_device_set_power()
241 int acpi_bus_set_power(acpi_handle handle, int state)  in acpi_bus_set_power()  argument
250 	return acpi_device_set_power(device, state);  in acpi_bus_set_power()
256 	int state;  in acpi_bus_init_power()  local
262 	device->power.state = ACPI_STATE_UNKNOWN;  in acpi_bus_init_power()
266 	result = acpi_device_get_power(device, &state);  in acpi_bus_init_power()
270 	if (state < ACPI_STATE_D3_COLD && device->power.flags.power_resources) {  in acpi_bus_init_power()
272 		result = acpi_power_on_resources(device, state);  in acpi_bus_init_power()
276 		if (state == ACPI_STATE_D0) {  in acpi_bus_init_power()
285 			result = acpi_dev_pm_explicit_set(device, state);  in acpi_bus_init_power()
289 	} else if (state == ACPI_STATE_UNKNOWN) {  in acpi_bus_init_power()
296 		state = ACPI_STATE_D0;  in acpi_bus_init_power()
298 	device->power.state = state;  in acpi_bus_init_power()
316 	    && device->power.state == ACPI_STATE_D0)  in acpi_device_fix_up_power()
324 	int state;  in acpi_device_update_power()  local
327 	if (device->power.state == ACPI_STATE_UNKNOWN) {  in acpi_device_update_power()
330 			*state_p = device->power.state;  in acpi_device_update_power()
335 	result = acpi_device_get_power(device, &state);  in acpi_device_update_power()
339 	if (state == ACPI_STATE_UNKNOWN) {  in acpi_device_update_power()
340 		state = ACPI_STATE_D0;  in acpi_device_update_power()
341 		result = acpi_device_set_power(device, state);  in acpi_device_update_power()
350 			result = acpi_power_transition(device, state);  in acpi_device_update_power()
354 		device->power.state = state;  in acpi_device_update_power()
357 		*state_p = state;  in acpi_device_update_power()
778 	int ret, state;  in acpi_dev_pm_low_power()  local
783 	ret = acpi_dev_pm_get_state(dev, adev, system_state, NULL, &state);  in acpi_dev_pm_low_power()
784 	return ret ? ret : acpi_device_set_power(adev, state);  in acpi_dev_pm_low_power()
943 	int ret, state;  in acpi_subsys_prepare()  local
960 	ret = acpi_dev_pm_get_state(dev, adev, sys_target, NULL, &state);  in acpi_subsys_prepare()
961 	return !ret && state == adev->power.state;  in acpi_subsys_prepare()