diff --git a/arch/arm/boot/dts/r8a7790.dtsi b/arch/arm/boot/dts/r8a7790.dtsi
index d3c6ab806616..e2c530c330a8 100644
--- a/arch/arm/boot/dts/r8a7790.dtsi
+++ b/arch/arm/boot/dts/r8a7790.dtsi
@@ -320,8 +320,6 @@ cmt0: timer@ffca0000 {
 		power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
 		resets = <&cpg 124>;
 
-		renesas,channels-mask = <0x60>;
-
 		status = "disabled";
 	};
 
@@ -341,8 +339,6 @@ cmt1: timer@e6130000 {
 		power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
 		resets = <&cpg 329>;
 
-		renesas,channels-mask = <0xff>;
-
 		status = "disabled";
 	};