diff --git a/arch/arm/dts/zynqmp-sck-kr-g-revA.dts b/arch/arm/dts/zynqmp-sck-kr-g-revA.dts
index caaf71d729..d318773bd9 100644
--- a/arch/arm/dts/zynqmp-sck-kr-g-revA.dts
+++ b/arch/arm/dts/zynqmp-sck-kr-g-revA.dts
@@ -210,7 +210,7 @@
 			ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_75_NS>;
 			ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
 			ti,dp83867-rxctrl-strap-quirk;
-			reset-assert-us = <100>;
+			reset-assert-us = <300>;
 			reset-deassert-us = <280>;
 			reset-gpios = <&slg7xl45106 5 GPIO_ACTIVE_LOW>;
 		};
diff --git a/arch/arm/dts/zynqmp-sck-kr-g-revB.dts b/arch/arm/dts/zynqmp-sck-kr-g-revB.dts
index f9d87559a7..69dba0761b 100644
--- a/arch/arm/dts/zynqmp-sck-kr-g-revB.dts
+++ b/arch/arm/dts/zynqmp-sck-kr-g-revB.dts
@@ -210,7 +210,7 @@
 			ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_75_NS>;
 			ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
 			ti,dp83867-rxctrl-strap-quirk;
-			reset-assert-us = <100>;
+			reset-assert-us = <300>;
 			reset-deassert-us = <280>;
 			reset-gpios = <&slg7xl45106 5 GPIO_ACTIVE_LOW>;
 		};