Lines Matching +full:cros +full:- +full:ec
1 // SPDX-License-Identifier: GPL-2.0-only
3 * ChromeOS EC multi-function device
7 * The ChromeOS EC multi function device is used to mux all the requests
8 * to the EC device for its multiple features: keyboard controller,
39 ec_dev->last_event_time = cros_ec_get_time_ns(); in ec_irq_handler()
45 * cros_ec_handle_event() - process and forward pending events on EC
48 * Call this function in a loop when the kernel is notified that the EC has
67 if (wake_event && device_may_wakeup(ec_dev->dev)) in cros_ec_handle_event()
68 pm_wakeup_event(ec_dev->dev, 0); in cros_ec_handle_event()
71 blocking_notifier_call_chain(&ec_dev->event_notifier, in cros_ec_handle_event()
104 if (ec_dev->host_sleep_v1) { in cros_ec_sleep_event()
126 if (ret >= 0 && ec_dev->host_sleep_v1 && in cros_ec_sleep_event()
128 ec_dev->last_resume_result = in cros_ec_sleep_event()
133 "EC detected sleep transition timeout. Total slp_s0 transitions: %d", in cros_ec_sleep_event()
150 mutex_lock(&ec_dev->lock); in cros_ec_ready_event()
152 mutex_unlock(&ec_dev->lock); in cros_ec_ready_event()
160 * cros_ec_register() - Register a new ChromeOS EC, using the provided info.
164 * in all the fields up to the --private-- marker.
170 struct device *dev = ec_dev->dev; in cros_ec_register()
173 BLOCKING_INIT_NOTIFIER_HEAD(&ec_dev->event_notifier); in cros_ec_register()
175 ec_dev->max_request = sizeof(struct ec_params_hello); in cros_ec_register()
176 ec_dev->max_response = sizeof(struct ec_response_get_protocol_info); in cros_ec_register()
177 ec_dev->max_passthru = 0; in cros_ec_register()
179 ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL); in cros_ec_register()
180 if (!ec_dev->din) in cros_ec_register()
181 return -ENOMEM; in cros_ec_register()
183 ec_dev->dout = devm_kzalloc(dev, ec_dev->dout_size, GFP_KERNEL); in cros_ec_register()
184 if (!ec_dev->dout) in cros_ec_register()
185 return -ENOMEM; in cros_ec_register()
187 mutex_init(&ec_dev->lock); in cros_ec_register()
191 dev_err(dev, "Cannot identify the EC: error %d\n", err); in cros_ec_register()
195 if (ec_dev->irq > 0) { in cros_ec_register()
196 err = devm_request_threaded_irq(dev, ec_dev->irq, in cros_ec_register()
200 "chromeos-ec", ec_dev); in cros_ec_register()
203 ec_dev->irq, err); in cros_ec_register()
208 /* Register a platform device for the main EC instance */ in cros_ec_register()
209 ec_dev->ec = platform_device_register_data(ec_dev->dev, "cros-ec-dev", in cros_ec_register()
212 if (IS_ERR(ec_dev->ec)) { in cros_ec_register()
213 dev_err(ec_dev->dev, in cros_ec_register()
214 "Failed to create CrOS EC platform device\n"); in cros_ec_register()
215 return PTR_ERR(ec_dev->ec); in cros_ec_register()
218 if (ec_dev->max_passthru) { in cros_ec_register()
220 * Register a platform device for the PD behind the main EC. in cros_ec_register()
222 * - behind an EC, we have a pd in cros_ec_register()
223 * - only one device added. in cros_ec_register()
224 * - the EC is responsive at init time (it is not true for a in cros_ec_register()
227 ec_dev->pd = platform_device_register_data(ec_dev->dev, in cros_ec_register()
228 "cros-ec-dev", in cros_ec_register()
231 if (IS_ERR(ec_dev->pd)) { in cros_ec_register()
232 dev_err(ec_dev->dev, in cros_ec_register()
233 "Failed to create CrOS PD platform device\n"); in cros_ec_register()
234 platform_device_unregister(ec_dev->ec); in cros_ec_register()
235 return PTR_ERR(ec_dev->pd); in cros_ec_register()
239 if (IS_ENABLED(CONFIG_OF) && dev->of_node) { in cros_ec_register()
242 platform_device_unregister(ec_dev->pd); in cros_ec_register()
243 platform_device_unregister(ec_dev->ec); in cros_ec_register()
244 dev_err(dev, "Failed to register sub-devices\n"); in cros_ec_register()
250 * Clear sleep event - this will fail harmlessly on platforms that in cros_ec_register()
255 dev_dbg(ec_dev->dev, "Error %d clearing sleep event to ec", in cros_ec_register()
258 if (ec_dev->mkbp_event_supported) { in cros_ec_register()
263 ec_dev->notifier_ready.notifier_call = cros_ec_ready_event; in cros_ec_register()
264 err = blocking_notifier_chain_register(&ec_dev->event_notifier, in cros_ec_register()
265 &ec_dev->notifier_ready); in cros_ec_register()
270 dev_info(dev, "Chrome EC device registered\n"); in cros_ec_register()
277 * cros_ec_unregister() - Remove a ChromeOS EC.
280 * Call this to deregister a ChromeOS EC, then clean up any private data.
286 if (ec_dev->pd) in cros_ec_unregister()
287 platform_device_unregister(ec_dev->pd); in cros_ec_unregister()
288 platform_device_unregister(ec_dev->ec); in cros_ec_unregister()
296 * cros_ec_suspend() - Handle a suspend operation for the ChromeOS EC device.
305 struct device *dev = ec_dev->dev; in cros_ec_suspend()
315 dev_dbg(ec_dev->dev, "Error %d sending suspend event to ec", in cros_ec_suspend()
319 ec_dev->wake_enabled = !enable_irq_wake(ec_dev->irq); in cros_ec_suspend()
321 disable_irq(ec_dev->irq); in cros_ec_suspend()
322 ec_dev->was_wake_device = ec_dev->wake_enabled; in cros_ec_suspend()
323 ec_dev->suspended = true; in cros_ec_suspend()
331 while (ec_dev->mkbp_event_supported && in cros_ec_report_events_during_suspend()
333 blocking_notifier_call_chain(&ec_dev->event_notifier, in cros_ec_report_events_during_suspend()
338 * cros_ec_resume() - Handle a resume operation for the ChromeOS EC device.
350 ec_dev->suspended = false; in cros_ec_resume()
351 enable_irq(ec_dev->irq); in cros_ec_resume()
359 dev_dbg(ec_dev->dev, "Error %d sending resume event to ec", in cros_ec_resume()
362 if (ec_dev->wake_enabled) { in cros_ec_resume()
363 disable_irq_wake(ec_dev->irq); in cros_ec_resume()
364 ec_dev->wake_enabled = 0; in cros_ec_resume()
380 MODULE_DESCRIPTION("ChromeOS EC core driver");