diff --git a/arch/arm/boot/dts/r8a7779-marzen.dts b/arch/arm/boot/dts/r8a7779-marzen.dts
index 541678df90a9829eba1e0f6259c3c3b4dce3b2ee..676151b70185d1a58488342774e8db956dd33f9f 100644
--- a/arch/arm/boot/dts/r8a7779-marzen.dts
+++ b/arch/arm/boot/dts/r8a7779-marzen.dts
@@ -170,7 +170,7 @@
 
 	du_pins: du {
 		du0 {
-			groups = "du0_rgb888", "du0_sync_1", "du0_clk_out_0";
+			groups = "du0_rgb888", "du0_sync_1", "du0_clk_out_0", "du0_clk_in";
 			function = "du0";
 		};
 		du1 {