27  * 2. via "Power Resource Control".
30  * An ACPI "power resource object" represents a software controllable power
31  * plane, clock plane, or other resource depended on by a device.
33  * A device may rely on multiple power resources, and a power resource
51 #define ACPI_POWER_DEVICE_NAME		"Power Resource"
71 	struct acpi_power_resource *resource;  member
78                              Power Resource Management
100 	struct acpi_power_resource *resource = acpi_power_get_context(handle);  in acpi_power_resources_list_add()  local
103 	if (!resource || !list)  in acpi_power_resources_list_add()
110 	entry->resource = resource;  in acpi_power_resources_list_add()
115 			if (e->resource->order > resource->order) {  in acpi_power_resources_list_add()
171 		/* Some ACPI tables contain duplicate power resource references */  in acpi_extract_power_resources()
209 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] is %s\n",  in acpi_power_get_state()
227 		struct acpi_power_resource *resource = entry->resource;  in acpi_power_get_list_state()  local
228 		acpi_handle handle = resource->device.handle;  in acpi_power_get_list_state()
231 		mutex_lock(&resource->resource_lock);  in acpi_power_get_list_state()
233 		mutex_unlock(&resource->resource_lock);  in acpi_power_get_list_state()
241 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource list is %s\n",  in acpi_power_get_list_state()
248 static int __acpi_power_on(struct acpi_power_resource *resource)  in __acpi_power_on()  argument
252 	status = acpi_evaluate_object(resource->device.handle, "_ON", NULL, NULL);  in __acpi_power_on()
256 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Power resource [%s] turned on\n",  in __acpi_power_on()
257 			  resource->name));  in __acpi_power_on()
262 static int acpi_power_on_unlocked(struct acpi_power_resource *resource)  in acpi_power_on_unlocked()  argument
266 	if (resource->ref_count++) {  in acpi_power_on_unlocked()
268 				  "Power resource [%s] already on\n",  in acpi_power_on_unlocked()
269 				  resource->name));  in acpi_power_on_unlocked()
271 		result = __acpi_power_on(resource);  in acpi_power_on_unlocked()
273 			resource->ref_count--;  in acpi_power_on_unlocked()
278 static int acpi_power_on(struct acpi_power_resource *resource)  in acpi_power_on()  argument
282 	mutex_lock(&resource->resource_lock);  in acpi_power_on()
283 	result = acpi_power_on_unlocked(resource);  in acpi_power_on()
284 	mutex_unlock(&resource->resource_lock);  in acpi_power_on()
288 static int __acpi_power_off(struct acpi_power_resource *resource)  in __acpi_power_off()  argument
292 	status = acpi_evaluate_object(resource->device.handle, "_OFF",  in __acpi_power_off()
297 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Power resource [%s] turned off\n",  in __acpi_power_off()
298 			  resource->name));  in __acpi_power_off()
302 static int acpi_power_off_unlocked(struct acpi_power_resource *resource)  in acpi_power_off_unlocked()  argument
306 	if (!resource->ref_count) {  in acpi_power_off_unlocked()
308 				  "Power resource [%s] already off\n",  in acpi_power_off_unlocked()
309 				  resource->name));  in acpi_power_off_unlocked()
313 	if (--resource->ref_count) {  in acpi_power_off_unlocked()
315 				  "Power resource [%s] still in use\n",  in acpi_power_off_unlocked()
316 				  resource->name));  in acpi_power_off_unlocked()
318 		result = __acpi_power_off(resource);  in acpi_power_off_unlocked()
320 			resource->ref_count++;  in acpi_power_off_unlocked()
325 static int acpi_power_off(struct acpi_power_resource *resource)  in acpi_power_off()  argument
329 	mutex_lock(&resource->resource_lock);  in acpi_power_off()
330 	result = acpi_power_off_unlocked(resource);  in acpi_power_off()
331 	mutex_unlock(&resource->resource_lock);  in acpi_power_off()
341 		result = acpi_power_off(entry->resource);  in acpi_power_off_list()
349 		acpi_power_on(entry->resource);  in acpi_power_off_list()
360 		result = acpi_power_on(entry->resource);  in acpi_power_on_list()
368 		acpi_power_off(entry->resource);  in acpi_power_on_list()
411 		struct acpi_device *res_dev = &entry->resource->device;  in acpi_power_hide_list()
435 		struct acpi_device *res_dev = &entry->resource->device;  in acpi_power_expose_list()
482 		struct acpi_power_resource *resource = entry->resource;  in acpi_power_wakeup_list_init()  local
483 		acpi_handle handle = resource->device.handle;  in acpi_power_wakeup_list_init()
487 		mutex_lock(&resource->resource_lock);  in acpi_power_wakeup_list_init()
491 			mutex_unlock(&resource->resource_lock);  in acpi_power_wakeup_list_init()
495 			resource->ref_count++;  in acpi_power_wakeup_list_init()
496 			resource->wakeup_enabled = true;  in acpi_power_wakeup_list_init()
498 		if (system_level > resource->system_level)  in acpi_power_wakeup_list_init()
499 			system_level = resource->system_level;  in acpi_power_wakeup_list_init()
501 		mutex_unlock(&resource->resource_lock);  in acpi_power_wakeup_list_init()
592 		struct acpi_power_resource *resource = entry->resource;  in acpi_enable_wakeup_device_power()  local
594 		mutex_lock(&resource->resource_lock);  in acpi_enable_wakeup_device_power()
596 		if (!resource->wakeup_enabled) {  in acpi_enable_wakeup_device_power()
597 			err = acpi_power_on_unlocked(resource);  in acpi_enable_wakeup_device_power()
599 				resource->wakeup_enabled = true;  in acpi_enable_wakeup_device_power()
602 		mutex_unlock(&resource->resource_lock);  in acpi_enable_wakeup_device_power()
655 		struct acpi_power_resource *resource = entry->resource;  in acpi_disable_wakeup_device_power()  local
657 		mutex_lock(&resource->resource_lock);  in acpi_disable_wakeup_device_power()
659 		if (resource->wakeup_enabled) {  in acpi_disable_wakeup_device_power()
660 			err = acpi_power_off_unlocked(resource);  in acpi_disable_wakeup_device_power()
662 				resource->wakeup_enabled = false;  in acpi_disable_wakeup_device_power()
665 		mutex_unlock(&resource->resource_lock);  in acpi_disable_wakeup_device_power()
758 	struct acpi_power_resource *resource;  in acpi_release_power_resource()  local
760 	resource = container_of(device, struct acpi_power_resource, device);  in acpi_release_power_resource()
763 	list_del(&resource->list_node);  in acpi_release_power_resource()
767 	kfree(resource);  in acpi_release_power_resource()
773 	struct acpi_power_resource *resource;  in acpi_power_in_use_show()  local
775 	resource = to_power_resource(to_acpi_device(dev));  in acpi_power_in_use_show()
776 	return sprintf(buf, "%u\n", !!resource->ref_count);  in acpi_power_in_use_show()
785 static void acpi_power_add_resource_to_list(struct acpi_power_resource *resource)  in acpi_power_add_resource_to_list()  argument
793 			if (r->order > resource->order) {  in acpi_power_add_resource_to_list()
794 				list_add_tail(&resource->list_node, &r->list_node);  in acpi_power_add_resource_to_list()
798 	list_add_tail(&resource->list_node, &acpi_power_resource_list);  in acpi_power_add_resource_to_list()
806 	struct acpi_power_resource *resource;  in acpi_add_power_resource()  local
817 	resource = kzalloc(sizeof(*resource), GFP_KERNEL);  in acpi_add_power_resource()
818 	if (!resource)  in acpi_add_power_resource()
821 	device = &resource->device;  in acpi_add_power_resource()
824 	mutex_init(&resource->resource_lock);  in acpi_add_power_resource()
825 	INIT_LIST_HEAD(&resource->list_node);  in acpi_add_power_resource()
826 	resource->name = device->pnp.bus_id;  in acpi_add_power_resource()
831 	/* Evalute the object to get the system level and resource order. */  in acpi_add_power_resource()
836 	resource->system_level = acpi_object.power_resource.system_level;  in acpi_add_power_resource()
837 	resource->order = acpi_object.power_resource.resource_order;  in acpi_add_power_resource()
854 	acpi_power_add_resource_to_list(resource);  in acpi_add_power_resource()
866 	struct acpi_power_resource *resource;  in acpi_resume_power_resources()  local
870 	list_for_each_entry(resource, &acpi_power_resource_list, list_node) {  in acpi_resume_power_resources()
873 		mutex_lock(&resource->resource_lock);  in acpi_resume_power_resources()
875 		result = acpi_power_get_state(resource->device.handle, &state);  in acpi_resume_power_resources()
877 			mutex_unlock(&resource->resource_lock);  in acpi_resume_power_resources()
882 		    && resource->ref_count) {  in acpi_resume_power_resources()
883 			dev_info(&resource->device.dev, "Turning ON\n");  in acpi_resume_power_resources()
884 			__acpi_power_on(resource);  in acpi_resume_power_resources()
887 		mutex_unlock(&resource->resource_lock);  in acpi_resume_power_resources()
895 	struct acpi_power_resource *resource;  in acpi_turn_off_unused_power_resources()  local
899 	list_for_each_entry_reverse(resource, &acpi_power_resource_list, list_node) {  in acpi_turn_off_unused_power_resources()
902 		mutex_lock(&resource->resource_lock);  in acpi_turn_off_unused_power_resources()
904 		result = acpi_power_get_state(resource->device.handle, &state);  in acpi_turn_off_unused_power_resources()
906 			mutex_unlock(&resource->resource_lock);  in acpi_turn_off_unused_power_resources()
911 		    && !resource->ref_count) {  in acpi_turn_off_unused_power_resources()
912 			dev_info(&resource->device.dev, "Turning OFF\n");  in acpi_turn_off_unused_power_resources()
913 			__acpi_power_off(resource);  in acpi_turn_off_unused_power_resources()
916 		mutex_unlock(&resource->resource_lock);  in acpi_turn_off_unused_power_resources()