diff --git a/external/patch/kernel/rockchip-rk3588-legacy/board_orangepicm5/0001-rk3588s-orangepi-cm5-gmac1-RMII-for-YT8522C.patch b/external/patch/kernel/rockchip-rk3588-legacy/board_orangepicm5/0001-rk3588s-orangepi-cm5-gmac1-RMII-for-YT8522C.patch
index 1a5b12557527..ca65bad64a65 100644
--- a/external/patch/kernel/rockchip-rk3588-legacy/board_orangepicm5/0001-rk3588s-orangepi-cm5-gmac1-RMII-for-YT8522C.patch
+++ b/external/patch/kernel/rockchip-rk3588-legacy/board_orangepicm5/0001-rk3588s-orangepi-cm5-gmac1-RMII-for-YT8522C.patch
@@ -1,29 +1,41 @@
-From ede9ed9d5582f744ed108c544316b90f7db678b3 Mon Sep 17 00:00:00 2001
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: yuquanjun <yuquanjun@lookzn.cn>
-Date: Tue, 12 May 2026 18:44:11 +0800
-Subject: [PATCH] rk3588s: orangepi-cm5: gmac1 RMII for YT8522C
+Date: Tue, 13 May 2026 00:00:00 +0800
+Subject: [PATCH] rk3588s: orangepi-cm5: gmac1 RMII for YT8522C on custom board
+
+Configure GMAC1 for RMII mode with Motorcomm YT8522C PHY:
+- Switch from RGMII to RMII mode
+- SOC outputs 25MHz refclk (REFCLKO25M_ETH1_OUT) to PHY via GMAC_MCLK pin
+- PHY address: 0x1 (PHYAD[1:0] = 2'b01 per schematic)
+- PHY reset: GPIO1_C1 (active-low, per MR3588S_MB_BASE_V1.0 schematic)
+- Remove RGMII-specific pinmux, tx/rx delay settings
+- Add RMII clock pinmux (gmac1_clkinout)
 
 ---
- .../boot/dts/rockchip/rk3588s-orangepi-cm5.dts     | 14 ++++----------
- 1 file changed, 4 insertions(+), 10 deletions(-)
+ arch/arm64/boot/dts/rockchip/rk3588s-orangepi-cm5.dts | 17 +++++-----------
+ 1 file changed, 6 insertions(+), 11 deletions(-)
 
 diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-orangepi-cm5.dts b/arch/arm64/boot/dts/rockchip/rk3588s-orangepi-cm5.dts
-index b9e4af46e..79c14ad02 100755
+index b9e4af46e..49b96e821 100755
 --- a/arch/arm64/boot/dts/rockchip/rk3588s-orangepi-cm5.dts
 +++ b/arch/arm64/boot/dts/rockchip/rk3588s-orangepi-cm5.dts
-@@ -123,31 +123,25 @@ ext_cam_ov5647_clk: external-camera-ov5647-clock {
+@@ -123,33 +123,30 @@ ext_cam_ov5647_clk: external-camera-ov5647-clock {
  };
  
  &gmac1 {
 -	/* Use rgmii-rxid mode to disable rx delay inside Soc */
 -	phy-mode = "rgmii-rxid";
++	phy-supply = <&vcc3v3_sys>;
 +	phy-mode = "rmii";
++	max-speed = <100>;
  	clock_in_out = "output";
  
- 	snps,reset-gpio = <&gpio3 RK_PB2 GPIO_ACTIVE_LOW>;
+-	snps,reset-gpio = <&gpio3 RK_PB2 GPIO_ACTIVE_LOW>;
++	snps,reset-gpios = <&gpio1 RK_PC1 GPIO_ACTIVE_LOW>; /* YT8522C PHY reset */
  	snps,reset-active-low;
 -	/* Reset time is 20ms, 100ms for rtl8211f */
- 	snps,reset-delays-us = <0 20000 100000>;
+-	snps,reset-delays-us = <0 20000 100000>;
++	snps,reset-delays-us = <0 20000 50000>;
  
  	pinctrl-names = "default";
  	pinctrl-0 = <&gmac1_miim
@@ -46,7 +58,6 @@ index b9e4af46e..79c14ad02 100755
 +	rmii_phy1: phy@1 {
  		compatible = "ethernet-phy-ieee802.3-c22";
  		reg = <0x1>;
++		clocks = <&cru REFCLKO25M_ETH1_OUT>;
  	};
--- 
-2.34.1
-
+ };