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-rw-r--r--src/mainboard/amd/persimmon/dsdt.asl14
1 files changed, 13 insertions, 1 deletions
diff --git a/src/mainboard/amd/persimmon/dsdt.asl b/src/mainboard/amd/persimmon/dsdt.asl
index 148d7b074b..dff59170de 100644
--- a/src/mainboard/amd/persimmon/dsdt.asl
+++ b/src/mainboard/amd/persimmon/dsdt.asl
@@ -1157,8 +1157,20 @@ DefinitionBlock (
Device(PCI0) {
External (TOM1)
External (TOM2)
- Name(_HID, EISAID("PNP0A03"))
+ Name(_HID, EISAID("PNP0A08")) /* PCI Express Root Bridge */
+ Name(_CID, EISAID("PNP0A03")) /* PCI Root Bridge */
Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */
+
+ /* Operating System Capabilities Method */
+ Method(_OSC,4)
+ { /* Check for proper PCI/PCIe UUID */
+ If(LEqual(Arg0,ToUUID("33DB4D5B-1FF7-401C-9657-7441C03DD766")))
+ {
+ /* Let OS control everything */
+ Return (Arg3)
+ }
+ }
+
Method(_BBN, 0) { /* Bus number = 0 */
Return(0)
}