diff --git a/arch/arm64/boot/dts/renesas/r8a779a0-falcon.dts b/arch/arm64/boot/dts/renesas/r8a779a0-falcon.dts
index 6bd580737f25..ea5dcee73658 100644
--- a/arch/arm64/boot/dts/renesas/r8a779a0-falcon.dts
+++ b/arch/arm64/boot/dts/renesas/r8a779a0-falcon.dts
@@ -33,6 +33,8 @@ phy0: ethernet-phy@0 {
 		reg = <0>;
 		interrupts-extended = <&gpio4 16 IRQ_TYPE_LEVEL_LOW>;
 		reset-gpios = <&gpio4 15 GPIO_ACTIVE_LOW>;
+		reset-assert-us = <10000>;
+		reset-deassert-us = <300>;
 	};
 };