diff --git a/dts/arm/nxp/nxp_k6x.dtsi b/dts/arm/nxp/nxp_k6x.dtsi
index 7cb61147e78..74da9773d84 100644
--- a/dts/arm/nxp/nxp_k6x.dtsi
+++ b/dts/arm/nxp/nxp_k6x.dtsi
@@ -50,7 +50,6 @@
 			compatible = "nxp,kinetis-mcg";
 			reg = <0x40064000 0xd>;
 			label = "MCG";
-			system-clock-frequency = <120000000>;
 			#clock-cells = <1>;
 		};
 
diff --git a/dts/arm/nxp/nxp_kw2xd.dtsi b/dts/arm/nxp/nxp_kw2xd.dtsi
index 88980723432..abeeee67464 100644
--- a/dts/arm/nxp/nxp_kw2xd.dtsi
+++ b/dts/arm/nxp/nxp_kw2xd.dtsi
@@ -29,7 +29,6 @@
 			compatible = "nxp,kinetis-mcg";
 			reg = <0x40064000 0xd>;
 			label = "MCG";
-			system-clock-frequency = <48000000>;
 			#clock-cells = <1>;
 		};
 
diff --git a/dts/arm/nxp/nxp_kw40z.dtsi b/dts/arm/nxp/nxp_kw40z.dtsi
index a40dee83a7e..06a40255f03 100644
--- a/dts/arm/nxp/nxp_kw40z.dtsi
+++ b/dts/arm/nxp/nxp_kw40z.dtsi
@@ -26,7 +26,6 @@
 		mcg: clock-controller@40064000 {
 			compatible = "nxp,kw41z-mcg";
 			reg = <0x40064000 0x13>;
-			system-clock-frequency = <48000000>;
 		};
 
 		clock-controller@40065000 {
diff --git a/dts/arm/nxp/nxp_kw41z.dtsi b/dts/arm/nxp/nxp_kw41z.dtsi
index a217da288eb..9a8df86fc94 100644
--- a/dts/arm/nxp/nxp_kw41z.dtsi
+++ b/dts/arm/nxp/nxp_kw41z.dtsi
@@ -26,7 +26,6 @@
 		mcg: clock-controller@40064000 {
 			compatible = "nxp,kw41z-mcg";
 			reg = <0x40064000 0x13>;
-			system-clock-frequency = <48000000>;
 		};
 
 		clock-controller@40065000 {