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 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