diff --git a/arch/arm/boot/dts/rk3506.dtsi b/arch/arm/boot/dts/rk3506.dtsi
index d53a62fe5038..b7d1bc9a3078 100644
--- a/arch/arm/boot/dts/rk3506.dtsi
+++ b/arch/arm/boot/dts/rk3506.dtsi
@@ -909,6 +909,7 @@
 		interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cru SCLK_FSPI>, <&cru HCLK_FSPI>;
 		clock-names = "clk_sfc", "hclk_sfc";
+		rockchip,max-dll = <0x17F>;
 		#address-cells = <1>;
 		#size-cells = <0>;
 		status = "disabled";