diff --git a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
index b26c5a709777..a2ad79ddf73d 100644
--- a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
+++ b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
@@ -113,6 +113,8 @@ phy0: ethernet-phy@0 {
 		reg = <0>;
 		interrupts-extended = <&gpio1 17 IRQ_TYPE_LEVEL_LOW>;
 		reset-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
+		reset-assert-us = <10000>;
+		reset-deassert-us = <300>;
 	};
 };