40 const char *acpi_power_state_string(int state)  in acpi_power_state_string()  argument
42 	switch (state) {  in acpi_power_state_string()
67 int acpi_device_get_power(struct acpi_device *device, int *state)  in acpi_device_get_power()  argument
71 	if (!device || !state)  in acpi_device_get_power()
76 		*state = device->parent ?  in acpi_device_get_power()
77 			device->parent->power.state : ACPI_STATE_D0;  in acpi_device_get_power()
120 	    && device->parent->power.state == ACPI_STATE_UNKNOWN  in acpi_device_get_power()
122 		device->parent->power.state = ACPI_STATE_D0;  in acpi_device_get_power()
124 	*state = result;  in acpi_device_get_power()
128 			  device->pnp.bus_id, acpi_power_state_string(*state)));  in acpi_device_get_power()
133 static int acpi_dev_pm_explicit_set(struct acpi_device *adev, int state)  in acpi_dev_pm_explicit_set()  argument
135 	if (adev->power.states[state].flags.explicit_set) {  in acpi_dev_pm_explicit_set()
136 		char method[5] = { '_', 'P', 'S', '0' + state, '\0' };  in acpi_dev_pm_explicit_set()
154 int acpi_device_set_power(struct acpi_device *device, int state)  in acpi_device_set_power()  argument
160 	    || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))  in acpi_device_set_power()
165 	if (state == device->power.state) {  in acpi_device_set_power()
168 				  acpi_power_state_string(state)));  in acpi_device_set_power()
172 	if (!device->power.states[state].flags.valid) {  in acpi_device_set_power()
174 			 acpi_power_state_string(state));  in acpi_device_set_power()
178 	    device->parent && (state < device->parent->power.state)) {  in acpi_device_set_power()
181 			 acpi_power_state_string(state),  in acpi_device_set_power()
182 			 acpi_power_state_string(device->parent->power.state));  in acpi_device_set_power()
187 	if (state == ACPI_STATE_D3_COLD  in acpi_device_set_power()
189 		state = ACPI_STATE_D3_HOT;  in acpi_device_set_power()
193 	if (state < device->power.state && state != ACPI_STATE_D0  in acpi_device_set_power()
194 	    && device->power.state >= ACPI_STATE_D3_HOT) {  in acpi_device_set_power()
207 		result = acpi_power_transition(device, state);  in acpi_device_set_power()
211 	result = acpi_dev_pm_explicit_set(device, state);  in acpi_device_set_power()
216 		device->power.state = state;  in acpi_device_set_power()
217 		state = ACPI_STATE_D3_COLD;  in acpi_device_set_power()
218 		result = acpi_power_transition(device, state);  in acpi_device_set_power()
224 			 acpi_power_state_string(state));  in acpi_device_set_power()
226 		device->power.state = state;  in acpi_device_set_power()
230 				  acpi_power_state_string(state)));  in acpi_device_set_power()
237 int acpi_bus_set_power(acpi_handle handle, int state)  in acpi_bus_set_power()  argument
246 	return acpi_device_set_power(device, state);  in acpi_bus_set_power()
252 	int state;  in acpi_bus_init_power()  local
258 	device->power.state = ACPI_STATE_UNKNOWN;  in acpi_bus_init_power()
262 	result = acpi_device_get_power(device, &state);  in acpi_bus_init_power()
266 	if (state < ACPI_STATE_D3_COLD && device->power.flags.power_resources) {  in acpi_bus_init_power()
267 		result = acpi_power_on_resources(device, state);  in acpi_bus_init_power()
271 		result = acpi_dev_pm_explicit_set(device, state);  in acpi_bus_init_power()
274 	} else if (state == ACPI_STATE_UNKNOWN) {  in acpi_bus_init_power()
281 		state = ACPI_STATE_D0;  in acpi_bus_init_power()
283 	device->power.state = state;  in acpi_bus_init_power()
301 	    && device->power.state == ACPI_STATE_D0)  in acpi_device_fix_up_power()
309 	int state;  in acpi_device_update_power()  local
312 	if (device->power.state == ACPI_STATE_UNKNOWN) {  in acpi_device_update_power()
315 			*state_p = device->power.state;  in acpi_device_update_power()
320 	result = acpi_device_get_power(device, &state);  in acpi_device_update_power()
324 	if (state == ACPI_STATE_UNKNOWN) {  in acpi_device_update_power()
325 		state = ACPI_STATE_D0;  in acpi_device_update_power()
326 		result = acpi_device_set_power(device, state);  in acpi_device_update_power()
335 			result = acpi_power_transition(device, state);  in acpi_device_update_power()
339 		device->power.state = state;  in acpi_device_update_power()
342 		*state_p = state;  in acpi_device_update_power()
763 	int ret, state;  in acpi_dev_pm_low_power()  local
768 	ret = acpi_dev_pm_get_state(dev, adev, system_state, NULL, &state);  in acpi_dev_pm_low_power()
769 	return ret ? ret : acpi_device_set_power(adev, state);  in acpi_dev_pm_low_power()
928 	int ret, state;  in acpi_subsys_prepare()  local
945 	ret = acpi_dev_pm_get_state(dev, adev, sys_target, NULL, &state);  in acpi_subsys_prepare()
946 	return !ret && state == adev->power.state;  in acpi_subsys_prepare()