1 // SPDX-License-Identifier: GPL-2.0-only
3 * ACPI Hardware Error Device (PNP0C33) Driver
5 * Copyright (C) 2010, Intel Corp.
6 * Author: Huang Ying <ying.huang@intel.com>
8 * ACPI Hardware Error Device is used to report some hardware errors
9 * notified via SCI, mainly the corrected errors.
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/acpi.h>
18 static const struct acpi_device_id acpi_hed_ids[] = {
22 MODULE_DEVICE_TABLE(acpi, acpi_hed_ids);
24 static acpi_handle hed_handle;
26 static BLOCKING_NOTIFIER_HEAD(acpi_hed_notify_list);
28 int register_acpi_hed_notifier(struct notifier_block *nb)
30 return blocking_notifier_chain_register(&acpi_hed_notify_list, nb);
32 EXPORT_SYMBOL_GPL(register_acpi_hed_notifier);
34 void unregister_acpi_hed_notifier(struct notifier_block *nb)
36 blocking_notifier_chain_unregister(&acpi_hed_notify_list, nb);
38 EXPORT_SYMBOL_GPL(unregister_acpi_hed_notifier);
41 * SCI to report hardware error is forwarded to the listeners of HED,
42 * it is used by HEST Generic Hardware Error Source with notify type
45 static void acpi_hed_notify(struct acpi_device *device, u32 event)
47 blocking_notifier_call_chain(&acpi_hed_notify_list, 0, NULL);
50 static int acpi_hed_add(struct acpi_device *device)
52 /* Only one hardware error device */
55 hed_handle = device->handle;
59 static int acpi_hed_remove(struct acpi_device *device)
65 static struct acpi_driver acpi_hed_driver = {
66 .name = "hardware_error_device",
67 .class = "hardware_error",
71 .remove = acpi_hed_remove,
72 .notify = acpi_hed_notify,
75 module_acpi_driver(acpi_hed_driver);
77 ACPI_MODULE_NAME("hed");
78 MODULE_AUTHOR("Huang Ying");
79 MODULE_DESCRIPTION("ACPI Hardware Error Device Driver");
80 MODULE_LICENSE("GPL");