diff --git a/arch/arm/boot/dts/nxp/imx/imx6q-bx50v3.dtsi b/arch/arm/boot/dts/nxp/imx/imx6q-bx50v3.dtsi
index 1e2266a2368b..2c8d2ab8cda1 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6q-bx50v3.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6q-bx50v3.dtsi
@@ -124,24 +124,28 @@
 					reg = <0>;
 					interrupt-parent = <&switch>;
 					interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
+					max-speed = <100>; /* only 100Mbit/s lanes are routed */
 				};
 
 				switchphy1: switchphy@1 {
 					reg = <1>;
 					interrupt-parent = <&switch>;
 					interrupts = <1 IRQ_TYPE_LEVEL_HIGH>;
+					max-speed = <100>; /* only 100Mbit/s lanes are routed */
 				};
 
 				switchphy2: switchphy@2 {
 					reg = <2>;
 					interrupt-parent = <&switch>;
 					interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
+					max-speed = <100>; /* only 100Mbit/s lanes are routed */
 				};
 
 				switchphy3: switchphy@3 {
 					reg = <3>;
 					interrupt-parent = <&switch>;
 					interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
+					max-speed = <100>; /* only 100Mbit/s lanes are routed */
 				};
 
 				switchphy4: switchphy@4 {