1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * cros_ec_dev - expose the Chrome OS Embedded Controller to user-space
20 #define DRV_NAME "cros-ec-dev"
28  * struct cros_feature_to_name - CrOS feature id to name/short description.
40  * struct cros_feature_to_cells - CrOS feature id to mfd cells association.
75 	{ .name = "cros-ec-cec", },
79 	{ .name = "cros-ec-rtc", },
83 	{ .name = "cros-ec-sensorhub", },
87 	{ .name = "cros-usbpd-charger", },
88 	{ .name = "cros-usbpd-logger", },
92 	{ .name = "cros-usbpd-notify", },
114 	{ .name = "cros-ec-chardev", },
115 	{ .name = "cros-ec-debugfs", },
116 	{ .name = "cros-ec-sysfs", },
117 	{ .name = "cros-ec-pchg", },
121 	{ .name = "cros-ec-lightbar", }
125 	{ .name = "cros-ec-vbc", }
135 	int retval = -ENOMEM;  in ec_device_probe()
137 	struct device *dev = &pdev->dev;  in ec_device_probe()
146 	ec->ec_dev = dev_get_drvdata(dev->parent);  in ec_device_probe()
147 	ec->dev = dev;  in ec_device_probe()
148 	ec->cmd_offset = ec_platform->cmd_offset;  in ec_device_probe()
149 	ec->features[0] = -1U; /* Not cached yet */  in ec_device_probe()
150 	ec->features[1] = -1U; /* Not cached yet */  in ec_device_probe()
151 	device_initialize(&ec->class_dev);  in ec_device_probe()
165 			ec_platform->ec_name = cros_mcu_devices[i].name;  in ec_device_probe()
173 	ec->class_dev.class = &cros_class;  in ec_device_probe()
174 	ec->class_dev.parent = dev;  in ec_device_probe()
175 	ec->class_dev.release = cros_ec_class_release;  in ec_device_probe()
177 	retval = dev_set_name(&ec->class_dev, "%s", ec_platform->ec_name);  in ec_device_probe()
183 	retval = device_add(&ec->class_dev);  in ec_device_probe()
189 		retval = mfd_add_hotplug_devices(ec->dev,  in ec_device_probe()
193 			dev_err(ec->dev, "failed to add %s subdevice: %d\n",  in ec_device_probe()
194 				cros_ec_sensorhub_cells->name, retval);  in ec_device_probe()
199 	 * EC_FEATURE_GET_CMD Embedded Controller device.  in ec_device_probe()
203 			retval = mfd_add_hotplug_devices(ec->dev,  in ec_device_probe()
207 				dev_err(ec->dev,  in ec_device_probe()
209 					cros_subdevices[i].mfd_cells->name,  in ec_device_probe()
220 		retval = mfd_add_hotplug_devices(ec->dev,  in ec_device_probe()
224 			dev_warn(ec->dev, "failed to add lightbar: %d\n",  in ec_device_probe()
233 	if (IS_ENABLED(CONFIG_OF) && ec->ec_dev->dev->of_node) {  in ec_device_probe()
235 			retval = mfd_add_hotplug_devices(ec->dev,  in ec_device_probe()
239 				dev_err(ec->dev,  in ec_device_probe()
247 	 * EC_FEATURE_GET_CMD to the Embedded Controller device.  in ec_device_probe()
249 	retval = mfd_add_hotplug_devices(ec->dev, cros_ec_platform_cells,  in ec_device_probe()
252 		dev_warn(ec->dev,  in ec_device_probe()
253 			 "failed to add cros-ec platform devices: %d\n",  in ec_device_probe()
257 	node = ec->ec_dev->dev->of_node;  in ec_device_probe()
258 	if (of_property_read_bool(node, "google,has-vbc-nvram")) {  in ec_device_probe()
259 		retval = mfd_add_hotplug_devices(ec->dev, cros_ec_vbc_cells,  in ec_device_probe()
262 			dev_warn(ec->dev, "failed to add VBC devices: %d\n",  in ec_device_probe()
269 	put_device(&ec->class_dev);  in ec_device_probe()
275 	struct cros_ec_dev *ec = dev_get_drvdata(&pdev->dev);  in ec_device_remove()
277 	mfd_remove_devices(ec->dev);  in ec_device_remove()
278 	device_unregister(&ec->class_dev);  in ec_device_remove()
331 MODULE_DESCRIPTION("Userspace interface to the Chrome OS Embedded Controller");