diff --git a/src/mainboard/intel/mtlrvp/Kconfig b/src/mainboard/intel/mtlrvp/Kconfig
index 945aa2e51c..3468ac9651 100644
--- a/src/mainboard/intel/mtlrvp/Kconfig
+++ b/src/mainboard/intel/mtlrvp/Kconfig
@@ -13,6 +13,7 @@ config BOARD_INTEL_MTLRVP_P
 
 config BOARD_INTEL_MTLRVP_P_EXT_EC
 	select BOARD_INTEL_MTLRVP_COMMON
+	select DRIVERS_INTEL_PMC
 
 if BOARD_INTEL_MTLRVP_COMMON
 
diff --git a/src/mainboard/intel/mtlrvp/dsdt.asl b/src/mainboard/intel/mtlrvp/dsdt.asl
index d253617dcb..a367bbbb69 100644
--- a/src/mainboard/intel/mtlrvp/dsdt.asl
+++ b/src/mainboard/intel/mtlrvp/dsdt.asl
@@ -22,6 +22,7 @@ DefinitionBlock(
 		{
 			#include <soc/intel/common/block/acpi/acpi/northbridge.asl>
 			#include <soc/intel/meteorlake/acpi/southbridge.asl>
+			#include <soc/intel/meteorlake/acpi/tcss.asl>
 		}
 	}
 
diff --git a/src/mainboard/intel/mtlrvp/variants/mtlrvp_p_ext_ec/overridetree.cb b/src/mainboard/intel/mtlrvp/variants/mtlrvp_p_ext_ec/overridetree.cb
index b08d7cabe4..f51f18b564 100644
--- a/src/mainboard/intel/mtlrvp/variants/mtlrvp_p_ext_ec/overridetree.cb
+++ b/src/mainboard/intel/mtlrvp/variants/mtlrvp_p_ext_ec/overridetree.cb
@@ -3,8 +3,38 @@ chip soc/intel/meteorlake
 	device domain 0 on
 		device ref soc_espi on
 			chip ec/google/chromeec
+				use conn0 as mux_conn[0]
+				use conn1 as mux_conn[1]
+				use conn2 as mux_conn[2]
+				use conn3 as mux_conn[3]
 				device pnp 0c09.0 on end
 			end
 		end
+		device ref pmc hidden
+			chip drivers/intel/pmc_mux
+				device generic 0 on
+					chip drivers/intel/pmc_mux/conn
+						use usb2_port1 as usb2_port
+						use tcss_usb3_port1 as usb3_port
+						device generic 0 alias conn0 on end
+					end
+					chip drivers/intel/pmc_mux/conn
+						use usb2_port2 as usb2_port
+						use tcss_usb3_port2 as usb3_port
+						device generic 1 alias conn1 on end
+					end
+					chip drivers/intel/pmc_mux/conn
+						use usb2_port3 as usb2_port
+						use tcss_usb3_port3 as usb3_port
+						device generic 2 alias conn2 on end
+					end
+					chip drivers/intel/pmc_mux/conn
+						use usb2_port4 as usb2_port
+						use tcss_usb3_port4 as usb3_port
+						device generic 3 alias conn3 on end
+					end
+				end
+			end
+		end
 	end
 end