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_LICENSE("GPL");
10
smartconnect_acpi_init(struct acpi_device * acpi)11 static int smartconnect_acpi_init(struct acpi_device *acpi)
12 {
13 unsigned long long value;
14 acpi_status status;
15
16 status = acpi_evaluate_integer(acpi->handle, "GAOS", NULL, &value);
17 if (ACPI_FAILURE(status))
18 return -EINVAL;
19
20 if (value & 0x1) {
21 dev_info(&acpi->dev, "Disabling Intel Smart Connect\n");
22 status = acpi_execute_simple_method(acpi->handle, "SAOS", 0);
23 }
24
25 return 0;
26 }
27
28 static const struct acpi_device_id smartconnect_ids[] = {
29 {"INT33A0", 0},
30 {"", 0}
31 };
32 MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
33
34 static struct acpi_driver smartconnect_driver = {
35 .name = "intel_smart_connect",
36 .class = "intel_smart_connect",
37 .ids = smartconnect_ids,
38 .ops = {
39 .add = smartconnect_acpi_init,
40 },
41 };
42
43 module_acpi_driver(smartconnect_driver);
44