src/soc/intel/common/acpi/pci_osc.asl

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