diff --git a/src/mainboard/google/volteer/variants/volteer/overridetree.cb b/src/mainboard/google/volteer/variants/volteer/overridetree.cb
index c32b80e9ec..577f7c8e84 100644
--- a/src/mainboard/google/volteer/variants/volteer/overridetree.cb
+++ b/src/mainboard/google/volteer/variants/volteer/overridetree.cb
@@ -156,7 +156,20 @@ chip soc/intel/tigerlake
 						register "usb3_port_number" = "2"
 						# SBU is fixed, HSL follows CC
 						register "sbu_orientation" = "TYPEC_ORIENTATION_NORMAL"
-						device generic 1 on end
+						device generic 1 on
+							probe DB_USB USB4_GEN2
+							probe DB_USB USB3_ACTIVE
+							probe DB_USB USB4_GEN3
+							probe DB_USB USB3_NO_A
+						end
+					end
+					chip drivers/intel/pmc_mux/con
+						register "usb2_port_number" = "4"
+						register "usb3_port_number" = "2"
+						# SBU & HSL follow CC
+						device generic 1 on
+							probe DB_USB USB3_PASSIVE
+						end
 					end
 				end
 			end