1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * pnpacpi -- PnP ACPI driver
21  * Compatible Device IDs
45 	pnp_dbg(&dev->dev, "get resources\n");  in pnpacpi_get_resources()
52 	acpi_handle handle;  in pnpacpi_set_resources()  local
55 	pnp_dbg(&dev->dev, "set resources\n");  in pnpacpi_set_resources()
57 	acpi_dev = ACPI_COMPANION(&dev->dev);  in pnpacpi_set_resources()
59 		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);  in pnpacpi_set_resources()
60 		return -ENODEV;  in pnpacpi_set_resources()
63 	if (WARN_ON_ONCE(acpi_dev != dev->data))  in pnpacpi_set_resources()
64 		dev->data = acpi_dev;  in pnpacpi_set_resources()
66 	handle = acpi_dev->handle;  in pnpacpi_set_resources()
67 	if (acpi_has_method(handle, METHOD_NAME__SRS)) {  in pnpacpi_set_resources()
78 			status = acpi_set_current_resources(handle, &buffer);  in pnpacpi_set_resources()
80 				ret = -EIO;  in pnpacpi_set_resources()
95 	dev_dbg(&dev->dev, "disable resources\n");  in pnpacpi_disable_resources()
97 	acpi_dev = ACPI_COMPANION(&dev->dev);  in pnpacpi_disable_resources()
99 		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);  in pnpacpi_disable_resources()
108 	status = acpi_evaluate_object(acpi_dev->handle, "_DIS", NULL, NULL);  in pnpacpi_disable_resources()
110 		return -ENODEV;  in pnpacpi_disable_resources()
118 	struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev);  in pnpacpi_can_wakeup()
121 		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);  in pnpacpi_can_wakeup()
125 	return acpi_bus_can_wakeup(acpi_dev->handle);  in pnpacpi_can_wakeup()
130 	struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev);  in pnpacpi_suspend()
134 		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);  in pnpacpi_suspend()
138 	if (device_can_wakeup(&dev->dev)) {  in pnpacpi_suspend()
139 		error = acpi_pm_set_device_wakeup(&dev->dev,  in pnpacpi_suspend()
140 					      device_may_wakeup(&dev->dev));  in pnpacpi_suspend()
146 		int power_state = acpi_pm_device_sleep_state(&dev->dev, NULL,  in pnpacpi_suspend()
154 		 * powered-down?), and in any case, our return value is ignored  in pnpacpi_suspend()
166 	struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev);  in pnpacpi_resume()
170 		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);  in pnpacpi_resume()
171 		return -ENODEV;  in pnpacpi_resume()
174 	if (device_may_wakeup(&dev->dev))  in pnpacpi_resume()
175 		acpi_pm_set_device_wakeup(&dev->dev, false);  in pnpacpi_resume()
197 static const char *__init pnpacpi_get_id(struct acpi_device *device)  in pnpacpi_get_id()  argument
201 	list_for_each_entry(id, &device->pnp.ids, list) {  in pnpacpi_get_id()
202 		if (ispnpidacpi(id->id))  in pnpacpi_get_id()
203 			return id->id;  in pnpacpi_get_id()
209 static int __init pnpacpi_add_device(struct acpi_device *device)  in pnpacpi_add_device()  argument
217 	if (device->physical_node_count)  in pnpacpi_add_device()
221 	 * If a PnPacpi device is not present , the device  in pnpacpi_add_device()
224 	if (!acpi_has_method(device->handle, "_CRS"))  in pnpacpi_add_device()
227 	pnpid = pnpacpi_get_id(device);  in pnpacpi_add_device()
231 	if (!device->status.present)  in pnpacpi_add_device()
236 		return -ENOMEM;  in pnpacpi_add_device()
238 	ACPI_COMPANION_SET(&dev->dev, device);  in pnpacpi_add_device()
239 	dev->data = device;  in pnpacpi_add_device()
240 	/* .enabled means the device can decode the resources */  in pnpacpi_add_device()
241 	dev->active = device->status.enabled;  in pnpacpi_add_device()
242 	if (acpi_has_method(device->handle, "_SRS"))  in pnpacpi_add_device()
243 		dev->capabilities |= PNP_CONFIGURABLE;  in pnpacpi_add_device()
244 	dev->capabilities |= PNP_READ;  in pnpacpi_add_device()
245 	if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))  in pnpacpi_add_device()
246 		dev->capabilities |= PNP_WRITE;  in pnpacpi_add_device()
247 	if (device->flags.removable)  in pnpacpi_add_device()
248 		dev->capabilities |= PNP_REMOVABLE;  in pnpacpi_add_device()
249 	if (acpi_has_method(device->handle, "_DIS"))  in pnpacpi_add_device()
250 		dev->capabilities |= PNP_DISABLE;  in pnpacpi_add_device()
252 	if (strlen(acpi_device_name(device)))  in pnpacpi_add_device()
253 		strscpy(dev->name, acpi_device_name(device), sizeof(dev->name));  in pnpacpi_add_device()
255 		strscpy(dev->name, acpi_device_bid(device), sizeof(dev->name));  in pnpacpi_add_device()
257 	if (dev->active)  in pnpacpi_add_device()
260 	if (dev->capabilities & PNP_CONFIGURABLE)  in pnpacpi_add_device()
263 	list_for_each_entry(id, &device->pnp.ids, list) {  in pnpacpi_add_device()
264 		if (!strcmp(id->id, pnpid))  in pnpacpi_add_device()
266 		if (!ispnpidacpi(id->id))  in pnpacpi_add_device()
268 		pnp_add_id(dev, id->id);  in pnpacpi_add_device()
272 	if (!dev->active)  in pnpacpi_add_device()
277 		put_device(&dev->dev);  in pnpacpi_add_device()
286 static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,  in pnpacpi_add_device_handler()  argument
290 	struct acpi_device *device = acpi_fetch_acpi_dev(handle);  in pnpacpi_add_device_handler()  local
292 	if (!device)  in pnpacpi_add_device_handler()
294 	if (acpi_is_pnp_device(device))  in pnpacpi_add_device_handler()
295 		pnpacpi_add_device(device);  in pnpacpi_add_device_handler()