x86/intel/smartconnect.c

0001 // SPDX-License-Identifier: GPL-2.0+
0002 /*
0003  *  Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
0004  */
0005
0006 #include <linux/acpi.h>
0007 #include <linux/module.h>
0008
0009 MODULE_LICENSE("GPL");
0010
0011 static int smartconnect_acpi_init(struct acpi_device *acpi)
0012 {
0013     unsigned long long value;
0014     acpi_status status;
0015
0016     status = acpi_evaluate_integer(acpi->handle, "GAOS", NULL, &value);
0017     if (ACPI_FAILURE(status))
0018         return -EINVAL;
0019
0020     if (value & 0x1) {
0021         dev_info(&acpi->dev, "Disabling Intel Smart Connect\n");
0022         status = acpi_execute_simple_method(acpi->handle, "SAOS", 0);
0023     }
0024
0025     return 0;
0026 }
0027
0028 static const struct acpi_device_id smartconnect_ids[] = {
0029     {"INT33A0", 0},
0030     {"", 0}
0031 };
0032 MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
0033
0034 static struct acpi_driver smartconnect_driver = {
0035     .owner = THIS_MODULE,
0036     .name = "intel_smart_connect",
0037     .class = "intel_smart_connect",
0038     .ids = smartconnect_ids,
0039     .ops = {
0040         .add = smartconnect_acpi_init,
0041     },
0042 };
0043
0044 module_acpi_driver(smartconnect_driver);