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 
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 	.owner = THIS_MODULE,
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