diff --git a/arch/arm/dts/uniphier-ph1-ld6b-ref.dts b/arch/arm/dts/uniphier-ph1-ld6b-ref.dts
index 13a29fd..e2a2a8c 100644
--- a/arch/arm/dts/uniphier-ph1-ld6b-ref.dts
+++ b/arch/arm/dts/uniphier-ph1-ld6b-ref.dts
@@ -9,6 +9,7 @@
 /dts-v1/;
 /include/ "uniphier-ph1-ld6b.dtsi"
 /include/ "uniphier-ref-daughter.dtsi"
+/include/ "uniphier-support-card.dtsi"
 
 / {
 	model = "UniPhier PH1-LD6b Reference Board";
@@ -37,6 +38,10 @@
 	};
 };
 
+&ethsc {
+	interrupts = <0 52 4>;
+};
+
 &serial0 {
 	status = "okay";
 };