diff --git a/src/mainboard/lenovo/x1_carbon_gen1/devicetree.cb b/src/mainboard/lenovo/x1_carbon_gen1/devicetree.cb
index e76f68a..cb2d8f3 100644
--- a/src/mainboard/lenovo/x1_carbon_gen1/devicetree.cb
+++ b/src/mainboard/lenovo/x1_carbon_gen1/devicetree.cb
@@ -155,6 +155,10 @@
 					register "eventc_enable" = "0xff"
 					register "eventd_enable" = "0xff"
 					register "evente_enable" = "0x0d"
+
+					register "has_bdc_detection" = "1"
+					register "bdc_gpio_num" = "54"
+					register "bdc_gpio_lvl" = "0"
 				end
 			end # LPC bridge
 			device pci 1f.2 on