2 * ACPI Hardware Error Device (PNP0C33) Driver
4 * Copyright (C) 2010, Intel Corp.
5 * Author: Huang Ying <ying.huang@intel.com>
7 * ACPI Hardware Error Device is used to report some hardware errors
8 * notified via SCI, mainly the corrected errors.
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License version
12 * 2 as published by the Free Software Foundation;
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <acpi/acpi_bus.h>
29 #include <acpi/acpi_drivers.h>
32 static struct acpi_device_id acpi_hed_ids[] = {
36 MODULE_DEVICE_TABLE(acpi, acpi_hed_ids);
38 static acpi_handle hed_handle;
40 static BLOCKING_NOTIFIER_HEAD(acpi_hed_notify_list);
42 int register_acpi_hed_notifier(struct notifier_block *nb)
44 return blocking_notifier_chain_register(&acpi_hed_notify_list, nb);
46 EXPORT_SYMBOL_GPL(register_acpi_hed_notifier);
48 void unregister_acpi_hed_notifier(struct notifier_block *nb)
50 blocking_notifier_chain_unregister(&acpi_hed_notify_list, nb);
52 EXPORT_SYMBOL_GPL(unregister_acpi_hed_notifier);
55 * SCI to report hardware error is forwarded to the listeners of HED,
56 * it is used by HEST Generic Hardware Error Source with notify type
59 static void acpi_hed_notify(struct acpi_device *device, u32 event)
61 blocking_notifier_call_chain(&acpi_hed_notify_list, 0, NULL);
64 static int acpi_hed_add(struct acpi_device *device)
66 /* Only one hardware error device */
69 hed_handle = device->handle;
73 static int acpi_hed_remove(struct acpi_device *device)
79 static struct acpi_driver acpi_hed_driver = {
80 .name = "hardware_error_device",
81 .class = "hardware_error",
85 .remove = acpi_hed_remove,
86 .notify = acpi_hed_notify,
89 module_acpi_driver(acpi_hed_driver);
91 ACPI_MODULE_NAME("hed");
92 MODULE_AUTHOR("Huang Ying");
93 MODULE_DESCRIPTION("ACPI Hardware Error Device Driver");
94 MODULE_LICENSE("GPL");