1 /*
2 * Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/acpi.h>
23
24 MODULE_LICENSE("GPL");
25
smartconnect_acpi_init(struct acpi_device * acpi)26 static int smartconnect_acpi_init(struct acpi_device *acpi)
27 {
28 unsigned long long value;
29 acpi_status status;
30
31 status = acpi_evaluate_integer(acpi->handle, "GAOS", NULL, &value);
32 if (ACPI_FAILURE(status))
33 return -EINVAL;
34
35 if (value & 0x1) {
36 dev_info(&acpi->dev, "Disabling Intel Smart Connect\n");
37 status = acpi_execute_simple_method(acpi->handle, "SAOS", 0);
38 }
39
40 return 0;
41 }
42
43 static const struct acpi_device_id smartconnect_ids[] = {
44 {"INT33A0", 0},
45 {"", 0}
46 };
47
48 static struct acpi_driver smartconnect_driver = {
49 .owner = THIS_MODULE,
50 .name = "intel_smart_connect",
51 .class = "intel_smart_connect",
52 .ids = smartconnect_ids,
53 .ops = {
54 .add = smartconnect_acpi_init,
55 },
56 };
57
58 module_acpi_driver(smartconnect_driver);
59
60 MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
61