int cros_ec_resume(struct cros_ec_device *ec_dev) { int ret; u8 sleep_event; ec_dev->suspended = false; enable_irq(ec_dev->irq); sleep_event = (!IS_ENABLED(CONFIG_ACPI) || pm_suspend_via_firmware()) ? HOST_SLEEP_EVENT_S3_RESUME : HOST_SLEEP_EVENT_S0IX_RESUME; ret = cros_ec_sleep_event(ec_dev, sleep_event); if (ret < 0) dev_dbg(ec_dev->dev, "Error %d sending resume event to ec", ret); if (ec_dev->wake_enabled) { disable_irq_wake(ec_dev->irq); ec_dev->wake_enabled = 0; } /* * Let the mfd devices know about events that occur during * suspend. This way the clients know what to do with them. */ cros_ec_report_events_during_suspend(ec_dev); return 0; }
int cros_ec_resume(struct cros_ec_device *ec_dev) { int ret; u8 sleep_event; ec_dev->suspended = false; enable_irq(ec_dev->irq); sleep_event = (!IS_ENABLED(CONFIG_ACPI) || pm_suspend_via_firmware()) ? HOST_SLEEP_EVENT_S3_RESUME : HOST_SLEEP_EVENT_S0IX_RESUME; ret = cros_ec_sleep_event(ec_dev, sleep_event); if (ret < 0) dev_dbg(ec_dev->dev, "Error %d sending resume event to ec", ret); /* * In some cases, we need to distinguish between events that occur * during suspend if the EC is not a wake source. For example, * keypresses during suspend should be discarded if it does not wake * the system. * * If the EC is not a wake source, drain the event queue and mark them * as "queued during suspend". */ if (ec_dev->wake_enabled) { disable_irq_wake(ec_dev->irq); ec_dev->wake_enabled = 0; } else { cros_ec_drain_events(ec_dev); } return 0; }
int cros_ec_suspend(struct cros_ec_device *ec_dev) { struct device *dev = ec_dev->dev; int ret; u8 sleep_event; sleep_event = (!IS_ENABLED(CONFIG_ACPI) || pm_suspend_via_firmware()) ? HOST_SLEEP_EVENT_S3_SUSPEND : HOST_SLEEP_EVENT_S0IX_SUSPEND; ret = cros_ec_sleep_event(ec_dev, sleep_event); if (ret < 0) dev_dbg(ec_dev->dev, "Error %d sending suspend event to ec", ret); if (device_may_wakeup(dev)) ec_dev->wake_enabled = !enable_irq_wake(ec_dev->irq); disable_irq(ec_dev->irq); ec_dev->was_wake_device = ec_dev->wake_enabled; ec_dev->suspended = true; return 0; }
int cros_ec_register(struct cros_ec_device *ec_dev) { struct device *dev = ec_dev->dev; int err = 0; BLOCKING_INIT_NOTIFIER_HEAD(&ec_dev->event_notifier); ec_dev->max_request = sizeof(struct ec_params_hello); ec_dev->max_response = sizeof(struct ec_response_get_protocol_info); ec_dev->max_passthru = 0; ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL); if (!ec_dev->din) return -ENOMEM; ec_dev->dout = devm_kzalloc(dev, ec_dev->dout_size, GFP_KERNEL); if (!ec_dev->dout) return -ENOMEM; mutex_init(&ec_dev->lock); err = cros_ec_query_all(ec_dev); if (err) { dev_err(dev, "Cannot identify the EC: error %d\n", err); return err; } if (ec_dev->irq) { err = devm_request_threaded_irq(dev, ec_dev->irq, NULL, ec_irq_thread, IRQF_TRIGGER_LOW | IRQF_ONESHOT, "chromeos-ec", ec_dev); if (err) { dev_err(dev, "Failed to request IRQ %d: %d", ec_dev->irq, err); return err; } } err = mfd_add_devices(ec_dev->dev, PLATFORM_DEVID_AUTO, &ec_cell, 1, NULL, ec_dev->irq, NULL); if (err) { dev_err(dev, "Failed to register Embedded Controller subdevice %d\n", err); return err; } if (ec_dev->max_passthru) { /* * Register a PD device as well on top of this device. * We make the following assumptions: * - behind an EC, we have a pd * - only one device added. * - the EC is responsive at init time (it is not true for a * sensor hub. */ err = mfd_add_devices(ec_dev->dev, PLATFORM_DEVID_AUTO, &ec_pd_cell, 1, NULL, ec_dev->irq, NULL); if (err) { dev_err(dev, "Failed to register Power Delivery subdevice %d\n", err); return err; } } if (IS_ENABLED(CONFIG_OF) && dev->of_node) { err = devm_of_platform_populate(dev); if (err) { mfd_remove_devices(dev); dev_err(dev, "Failed to register sub-devices\n"); return err; } } /* * Clear sleep event - this will fail harmlessly on platforms that * don't implement the sleep event host command. */ err = cros_ec_sleep_event(ec_dev, 0); if (err < 0) dev_dbg(ec_dev->dev, "Error %d clearing sleep event to ec", err); dev_info(dev, "Chrome EC device registered\n"); return 0; }