diff --git a/arch/arm/boot/dts/rv1108.dtsi b/arch/arm/boot/dts/rv1108.dtsi
index fda16f97605a..d12f035d59c2 100644
--- a/arch/arm/boot/dts/rv1108.dtsi
+++ b/arch/arm/boot/dts/rv1108.dtsi
@@ -366,7 +366,6 @@ adc: adc@1038c000 {
 		reg = <0x1038c000 0x100>;
 		interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
 		#io-channel-cells = <1>;
-		clock-frequency = <1000000>;
 		clocks = <&cru SCLK_SARADC>, <&cru PCLK_SARADC>;
 		clock-names = "saradc", "apb_pclk";
 		status = "disabled";