ethernet1 controller is connected to the RTL8211F-CG Realtek PHY in
RGMII mode. Enable this peripheral on the stm32mp257f-dk board.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
---
 arch/arm64/boot/dts/st/stm32mp257f-dk.dts | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
index a278a1e3ce03aa379d40ef807d268bbf31a04546..e718d888ce21b6f124331543c09c1e66e6304964 100644
--- a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
+++ b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
@@ -19,6 +19,7 @@ / {
 	compatible = "st,stm32mp257f-dk", "st,stm32mp257";
 
 	aliases {
+		ethernet0 = &ethernet1;
 		serial0 = &usart2;
 	};
 
@@ -77,6 +78,28 @@ &arm_wdt {
 	status = "okay";
 };
 
+&ethernet1 {
+	pinctrl-0 = <&eth1_rgmii_pins_b>;
+	pinctrl-1 = <&eth1_rgmii_sleep_pins_b>;
+	pinctrl-names = "default", "sleep";
+	phy-handle = <&phy1_eth1>;
+	phy-mode = "rgmii-id";
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "snps,dwmac-mdio";
+		phy1_eth1: ethernet-phy@1 {
+			compatible = "ethernet-phy-id001c.c916";
+			reg = <1>;
+			reset-gpios =  <&gpioa 2 GPIO_ACTIVE_LOW>;
+			reset-assert-us = <10000>;
+			reset-deassert-us = <80000>;
+		};
+	};
+};
+
 &scmi_regu {
 	scmi_vddio1: regulator@0 {
 		regulator-min-microvolt = <1800000>;

-- 
2.25.1