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