1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
4 */
5
6 #include <linux/acpi.h>
7 #include <linux/module.h>
8
9 MODULE_DESCRIPTION("Intel Smart Connect disabling driver");
10 MODULE_LICENSE("GPL");
11
smartconnect_acpi_init(struct acpi_device * acpi)12 static int smartconnect_acpi_init(struct acpi_device *acpi)
13 {
14 unsigned long long value;
15 acpi_status status;
16
17 status = acpi_evaluate_integer(acpi->handle, "GAOS", NULL, &value);
18 if (ACPI_FAILURE(status))
19 return -EINVAL;
20
21 if (value & 0x1) {
22 dev_info(&acpi->dev, "Disabling Intel Smart Connect\n");
23 status = acpi_execute_simple_method(acpi->handle, "SAOS", 0);
24 }
25
26 return 0;
27 }
28
29 static const struct acpi_device_id smartconnect_ids[] = {
30 {"INT33A0", 0},
31 {"", 0}
32 };
33 MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
34
35 static struct acpi_driver smartconnect_driver = {
36 .name = "intel_smart_connect",
37 .class = "intel_smart_connect",
38 .ids = smartconnect_ids,
39 .ops = {
40 .add = smartconnect_acpi_init,
41 },
42 };
43
44 module_acpi_driver(smartconnect_driver);
45