1 // SPDX-License-Identifier: GPL-2.0-only
14 #define DRV_NAME "cros-usbpd-notify"
15 #define DRV_NAME_PLAT_ACPI "cros-usbpd-notify-acpi"
22 	struct cros_ec_device *ec;  member
27  * cros_usbpd_register_notify - Register a notifier callback for PD events.
31  * "GOOG0003" ACPI device. On non-ACPI platforms this will filter mkbp events
44  * cros_usbpd_unregister_notify - Unregister notifier callback for PD events.
57  * cros_ec_pd_command - Send a command to the EC.
59  * @ec_dev: EC device
60  * @command: EC command
61  * @outdata: EC command output data
63  * @indata: EC command input data
80 		return -ENOMEM;  in cros_ec_pd_command()
82 	msg->command = command;  in cros_ec_pd_command()
83 	msg->outsize = outsize;  in cros_ec_pd_command()
84 	msg->insize = insize;  in cros_ec_pd_command()
87 		memcpy(msg->data, outdata, outsize);  in cros_ec_pd_command()
94 		memcpy(indata, msg->data, insize);  in cros_ec_pd_command()
113 			"EC device inaccessible; sending 0 event status.\n");  in cros_usbpd_get_event_and_notify()
117 	/* Check for PD host events on EC. */  in cros_usbpd_get_event_and_notify()
139 	cros_usbpd_get_event_and_notify(pdnotify->dev, pdnotify->ec);  in cros_usbpd_notify_acpi()
145 	struct device *dev = &pdev->dev;  in cros_usbpd_notify_probe_acpi()
154 		return -ENOMEM;  in cros_usbpd_notify_probe_acpi()
156 	/* Get the EC device pointer needed to talk to the EC. */  in cros_usbpd_notify_probe_acpi()
157 	ec_dev = dev_get_drvdata(dev->parent);  in cros_usbpd_notify_probe_acpi()
164 		dev_warn(dev, "Couldn't get Chrome EC device pointer.\n");  in cros_usbpd_notify_probe_acpi()
167 	pdnotify->dev = dev;  in cros_usbpd_notify_probe_acpi()
168 	pdnotify->ec = ec_dev;  in cros_usbpd_notify_probe_acpi()
170 	status = acpi_install_notify_handler(adev->handle,  in cros_usbpd_notify_probe_acpi()
177 		return -EINVAL;  in cros_usbpd_notify_probe_acpi()
185 	struct device *dev = &pdev->dev;  in cros_usbpd_notify_remove_acpi()
188 	acpi_remove_notify_handler(adev->handle, ACPI_ALL_NOTIFY,  in cros_usbpd_notify_remove_acpi()
224 		cros_usbpd_get_event_and_notify(pdnotify->dev, ec_dev);  in cros_usbpd_notify_plat()
232 	struct device *dev = &pdev->dev;  in cros_usbpd_notify_probe_plat()
233 	struct cros_ec_dev *ecdev = dev_get_drvdata(dev->parent);  in cros_usbpd_notify_probe_plat()
239 		return -ENOMEM;  in cros_usbpd_notify_probe_plat()
241 	pdnotify->dev = dev;  in cros_usbpd_notify_probe_plat()
242 	pdnotify->ec = ecdev->ec_dev;  in cros_usbpd_notify_probe_plat()
243 	pdnotify->nb.notifier_call = cros_usbpd_notify_plat;  in cros_usbpd_notify_probe_plat()
247 	ret = blocking_notifier_chain_register(&ecdev->ec_dev->event_notifier,  in cros_usbpd_notify_probe_plat()
248 					       &pdnotify->nb);  in cros_usbpd_notify_probe_plat()
259 	struct device *dev = &pdev->dev;  in cros_usbpd_notify_remove_plat()
260 	struct cros_ec_dev *ecdev = dev_get_drvdata(dev->parent);  in cros_usbpd_notify_remove_plat()
264 	blocking_notifier_chain_unregister(&ecdev->ec_dev->event_notifier,  in cros_usbpd_notify_remove_plat()
265 					   &pdnotify->nb);  in cros_usbpd_notify_remove_plat()