1 files changed, 104 insertions, 0 deletions
diff --git a/src/soc/intel/common/acpi/lpit.asl b/src/soc/intel/common/acpi/lpit.asl
new file mode 100644
index 0000000000..4f8bd5ece9
--- /dev/null
+++ b/src/soc/intel/common/acpi/lpit.asl
@@ -0,0 +1,104 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#define LPID_DSM_ARG2_ENUM_FUNCTIONS 0
+#define LPID_DSM_ARG2_GET_DEVICE_CONSTRAINTS 1
+
+#define LPID_DSM_ARG2_GET_CRASH_DUMP_DEV 2
+#define LPID_DSM_ARG2_DISPLAY_OFF_NOTIFY 3
+#define LPID_DSM_ARG2_DISPLAY_ON_NOTIFY 4
+#define LPID_DSM_ARG2_S0IX_ENTRY 5
+#define LPID_DSM_ARG2_S0IX_EXIT 6
+
+External(\_SB.MS0X, MethodObj)
+External(\_SB.PCI0.LPCB.EC0.S0IX, MethodObj)
+External(\_SB.PCI0.EGPM, MethodObj)
+External(\_SB.PCI0.RGPM, MethodObj)
+
+Scope(\_SB)
+{
+	Device(LPID)
+	{
+		Name(_ADR, 0x00000000)
+		Name(_CID, EISAID("PNP0D80"))
+		Name(UUID, ToUUID("c4eb40a0-6cd2-11e2-bcfd-0800200c9a66"))
+		Method(_DSM, 4)
+		{
+			If(Arg0 == ^UUID) {
+			/*
+			 * Enum functions
+			 */
+			If(Arg2 == LPID_DSM_ARG2_ENUM_FUNCTIONS) {
+				Return(Buffer(One) {0x60})
+			}
+			/*
+			 * Function 1 - Get Device Constraints
+			 */
+			If(Arg2 == LPID_DSM_ARG2_GET_DEVICE_CONSTRAINTS) {
+				Return(Package(5) {0, Ones, Ones, Ones, Ones})
+			}
+			/*
+			 * Function 2 - Get Crash Dump Device
+			 */
+			If(Arg2 == LPID_DSM_ARG2_GET_CRASH_DUMP_DEV) {
+				Return(Buffer(One) {0x0})
+			}
+			/*
+			 * Function 3 - Display Off Notification
+			 */
+			If(Arg2 == LPID_DSM_ARG2_DISPLAY_OFF_NOTIFY) {
+			}
+			/*
+			 * Function 4 - Display On Notification
+			 */
+			If(Arg2 == LPID_DSM_ARG2_DISPLAY_ON_NOTIFY) {
+			}
+			/*
+			 * Function 5 - Low Power S0 Entry Notification
+			 */
+			If(Arg2 == LPID_DSM_ARG2_S0IX_ENTRY) {
+				/* Inform the EC */
+				If (CondRefOf (\_SB.PCI0.LPCB.EC0.S0IX)) {
+					\_SB.PCI0.LPCB.EC0.S0IX(1)
+				}
+
+				/* provide board level S0ix hook */
+				If (CondRefOf (\_SB.MS0X)) {
+					\_SB.MS0X(1)
+				}
+
+				/*
+				 * Save the current PM bits then
+				 * enable GPIO PM with MISCCFG_ENABLE_GPIO_PM_CONFIG
+ 				 */
+				If (CondRefOf (\_SB.PCI0.EGPM))
+				{
+					\_SB.PCI0.EGPM ()
+				}
+			}
+			/*
+			 * Function 6 - Low Power S0 Exit Notification
+			 */
+			If(Arg2 == LPID_DSM_ARG2_S0IX_EXIT) {
+				/* Inform the EC */
+				If (CondRefOf (\_SB.PCI0.LPCB.EC0.S0IX)) {
+					\_SB.PCI0.LPCB.EC0.S0IX(0)
+				}
+
+				/* provide board level S0ix hook */
+				If (CondRefOf (\_SB.MS0X)) {
+					\_SB.MS0X(0)
+				}
+
+				/* Restore GPIO all Community PM */
+				If (CondRefOf (\_SB.PCI0.RGPM))
+				{
+					\_SB.PCI0.RGPM ()
+				}
+			}
+		}
+
+		Return(Buffer(One) {0x00})
+		}		// Method(_DSM)
+	}			// Device (LPID)
+}				// End Scope(\_SB)