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.
80 	{ .name = "cros-ec-cec", },
84 	{ .name = "cros-ec-rtc", },
88 	{ .name = "cros-ec-sensorhub", },
92 	{ .name = "cros-usbpd-charger", },
93 	{ .name = "cros-usbpd-logger", },
97 	{ .name = "cros-usbpd-notify", },
119 	{ .name = "cros-ec-chardev", },
120 	{ .name = "cros-ec-debugfs", },
121 	{ .name = "cros-ec-sysfs", },
125 	{ .name = "cros-ec-pchg", },
129 	{ .name = "cros-ec-lightbar", }
133 	{ .name = "cros-ec-vbc", }
143 	int retval = -ENOMEM;  in ec_device_probe()
145 	struct device *dev = &pdev->dev;  in ec_device_probe()
155 	ec->ec_dev = dev_get_drvdata(dev->parent);  in ec_device_probe()
156 	ec->dev = dev;  in ec_device_probe()
157 	ec->cmd_offset = ec_platform->cmd_offset;  in ec_device_probe()
158 	ec->features.flags[0] = -1U; /* Not cached yet */  in ec_device_probe()
159 	ec->features.flags[1] = -1U; /* Not cached yet */  in ec_device_probe()
160 	device_initialize(&ec->class_dev);  in ec_device_probe()
174 			ec_platform->ec_name = cros_mcu_devices[i].name;  in ec_device_probe()
182 	ec->class_dev.class = &cros_class;  in ec_device_probe()
183 	ec->class_dev.parent = dev;  in ec_device_probe()
184 	ec->class_dev.release = cros_ec_class_release;  in ec_device_probe()
186 	retval = dev_set_name(&ec->class_dev, "%s", ec_platform->ec_name);  in ec_device_probe()
192 	retval = device_add(&ec->class_dev);  in ec_device_probe()
198 		retval = mfd_add_hotplug_devices(ec->dev,  in ec_device_probe()
202 			dev_err(ec->dev, "failed to add %s subdevice: %d\n",  in ec_device_probe()
203 				cros_ec_sensorhub_cells->name, retval);  in ec_device_probe()
208 	 * EC_FEATURE_GET_CMD Embedded Controller device.  in ec_device_probe()
212 			retval = mfd_add_hotplug_devices(ec->dev,  in ec_device_probe()
216 				dev_err(ec->dev,  in ec_device_probe()
218 					cros_subdevices[i].mfd_cells->name,  in ec_device_probe()
229 		retval = mfd_add_hotplug_devices(ec->dev,  in ec_device_probe()
233 			dev_warn(ec->dev, "failed to add lightbar: %d\n",  in ec_device_probe()
242 	if (IS_ENABLED(CONFIG_OF) && ec->ec_dev->dev->of_node) {  in ec_device_probe()
244 			retval = mfd_add_hotplug_devices(ec->dev,  in ec_device_probe()
248 				dev_err(ec->dev,  in ec_device_probe()
258 	retval = cros_ec_cmd(ec->ec_dev, 0, EC_CMD_PCHG_COUNT, NULL, 0,  in ec_device_probe()
261 		retval = mfd_add_hotplug_devices(ec->dev,  in ec_device_probe()
265 			dev_warn(ec->dev, "failed to add pchg: %d\n",  in ec_device_probe()
271 	 * EC_FEATURE_GET_CMD to the Embedded Controller device.  in ec_device_probe()
273 	retval = mfd_add_hotplug_devices(ec->dev, cros_ec_platform_cells,  in ec_device_probe()
276 		dev_warn(ec->dev,  in ec_device_probe()
277 			 "failed to add cros-ec platform devices: %d\n",  in ec_device_probe()
281 	node = ec->ec_dev->dev->of_node;  in ec_device_probe()
282 	if (of_property_read_bool(node, "google,has-vbc-nvram")) {  in ec_device_probe()
283 		retval = mfd_add_hotplug_devices(ec->dev, cros_ec_vbc_cells,  in ec_device_probe()
286 			dev_warn(ec->dev, "failed to add VBC devices: %d\n",  in ec_device_probe()
293 	put_device(&ec->class_dev);  in ec_device_probe()
299 	struct cros_ec_dev *ec = dev_get_drvdata(&pdev->dev);  in ec_device_remove()
301 	mfd_remove_devices(ec->dev);  in ec_device_remove()
302 	device_unregister(&ec->class_dev);  in ec_device_remove()
354 MODULE_DESCRIPTION("Userspace interface to the Chrome OS Embedded Controller");