2  * ChromeOS EC multi-function device
15  * The ChromeOS EC multi function device is used to mux all the requests
16  * to the EC device for its multiple features: keyboard controller,
17  * battery charging and regulator control, firmware update.
43 	.name = "cros-ec-dev",
49 	.name = "cros-ec-dev",
67 	if (wake_event && device_may_wakeup(ec_dev->dev))  in ec_irq_thread()
68 		pm_wakeup_event(ec_dev->dev, 0);  in ec_irq_thread()
71 		blocking_notifier_call_chain(&ec_dev->event_notifier,  in ec_irq_thread()
96 	struct device *dev = ec_dev->dev;  in cros_ec_register()
99 	BLOCKING_INIT_NOTIFIER_HEAD(&ec_dev->event_notifier);  in cros_ec_register()
101 	ec_dev->max_request = sizeof(struct ec_params_hello);  in cros_ec_register()
102 	ec_dev->max_response = sizeof(struct ec_response_get_protocol_info);  in cros_ec_register()
103 	ec_dev->max_passthru = 0;  in cros_ec_register()
105 	ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL);  in cros_ec_register()
106 	if (!ec_dev->din)  in cros_ec_register()
107 		return -ENOMEM;  in cros_ec_register()
109 	ec_dev->dout = devm_kzalloc(dev, ec_dev->dout_size, GFP_KERNEL);  in cros_ec_register()
110 	if (!ec_dev->dout)  in cros_ec_register()
111 		return -ENOMEM;  in cros_ec_register()
113 	mutex_init(&ec_dev->lock);  in cros_ec_register()
117 		dev_err(dev, "Cannot identify the EC: error %d\n", err);  in cros_ec_register()
121 	if (ec_dev->irq) {  in cros_ec_register()
122 		err = devm_request_threaded_irq(dev, ec_dev->irq, NULL,  in cros_ec_register()
124 				"chromeos-ec", ec_dev);  in cros_ec_register()
127 				ec_dev->irq, err);  in cros_ec_register()
132 	err = mfd_add_devices(ec_dev->dev, PLATFORM_DEVID_AUTO, &ec_cell, 1,  in cros_ec_register()
133 			      NULL, ec_dev->irq, NULL);  in cros_ec_register()
141 	if (ec_dev->max_passthru) {  in cros_ec_register()
145 		 * - behind an EC, we have a pd  in cros_ec_register()
146 		 * - only one device added.  in cros_ec_register()
147 		 * - the EC is responsive at init time (it is not true for a  in cros_ec_register()
150 		err = mfd_add_devices(ec_dev->dev, PLATFORM_DEVID_AUTO,  in cros_ec_register()
151 				      &ec_pd_cell, 1, NULL, ec_dev->irq, NULL);  in cros_ec_register()
160 	if (IS_ENABLED(CONFIG_OF) && dev->of_node) {  in cros_ec_register()
164 			dev_err(dev, "Failed to register sub-devices\n");  in cros_ec_register()
170 	 * Clear sleep event - this will fail harmlessly on platforms that  in cros_ec_register()
175 		dev_dbg(ec_dev->dev, "Error %d clearing sleep event to ec",  in cros_ec_register()
178 	dev_info(dev, "Chrome EC device registered\n");  in cros_ec_register()
186 	mfd_remove_devices(ec_dev->dev);  in cros_ec_remove()
195 	struct device *dev = ec_dev->dev;  in cros_ec_suspend()
205 		dev_dbg(ec_dev->dev, "Error %d sending suspend event to ec",  in cros_ec_suspend()
209 		ec_dev->wake_enabled = !enable_irq_wake(ec_dev->irq);  in cros_ec_suspend()
211 	disable_irq(ec_dev->irq);  in cros_ec_suspend()
212 	ec_dev->was_wake_device = ec_dev->wake_enabled;  in cros_ec_suspend()
213 	ec_dev->suspended = true;  in cros_ec_suspend()
222 		blocking_notifier_call_chain(&ec_dev->event_notifier,  in cros_ec_report_events_during_suspend()
231 	ec_dev->suspended = false;  in cros_ec_resume()
232 	enable_irq(ec_dev->irq);  in cros_ec_resume()
240 		dev_dbg(ec_dev->dev, "Error %d sending resume event to ec",  in cros_ec_resume()
243 	if (ec_dev->wake_enabled) {  in cros_ec_resume()
244 		disable_irq_wake(ec_dev->irq);  in cros_ec_resume()
245 		ec_dev->wake_enabled = 0;  in cros_ec_resume()
261 MODULE_DESCRIPTION("ChromeOS EC core driver");