1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Copyright (C) 2016 Intel Corp. 4 */ 5 6#define PCI_OSC_UUID "33DB4D5B-1FF7-401C-9657-7441C03DD766" 7 8Scope (\_SB.PCI0) { 9 Method (_OSC, 4) { 10 /* Check for proper GUID */ 11 If (LEqual (Arg0, ToUUID (PCI_OSC_UUID))) { 12 /* Let OS control everything */ 13 Return (Arg3) 14 } Else { 15 /* Unrecognized UUID */ 16 CreateDWordField (Arg3, 0, CDW1) 17 Or (CDW1, 4, CDW1) 18 Return (Arg3) 19 } 20 } 21} 22