diff --git a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
index fdac104755..0f440f576f 100644
--- a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
@@ -111,6 +111,9 @@ chip soc/intel/tigerlake
 	register "usb3_ports[2]" = "USB3_PORT_DEFAULT(OC_SKIP)"	# M.2 WWAN
 	register "usb3_ports[3]" = "USB3_PORT_DEFAULT(OC_SKIP)"	# M.2 Camera
 
+	register "tcss_ports[0]" = "TCSS_PORT_DEFAULT(OC3)"
+	register "tcss_ports[1]" = "TCSS_PORT_DEFAULT(OC0)"
+
 	# EC host command ranges are in 0x800-0x8ff & 0x200-0x20f
 	register "gen1_dec" = "0x00fc0801"
 	register "gen2_dec" = "0x000c0201"