[PATCH v2 3/4] arm64: dts: st: enable ethernet1 controller on stm32mp257f-ev1

From: Gatien Chevallier
Date: Thu Sep 04 2025 - 03:41:22 EST


ethernet1 controller is connected to the RTL8211F-CG Realtek PHY in
RGMII mode. It can either be used as a standalone Ethernet controller
or be connected to the internal TSN capable switch. For this board,
keep the standalone setup. Also enable this peripheral on the
stm32mp257f-ev1 board.

Signed-off-by: Gatien Chevallier <gatien.chevallier@xxxxxxxxxxx>
---
arch/arm64/boot/dts/st/stm32mp257f-ev1.dts | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
index 4ff334563599b46e987474076798337e75e16ef7..1135826c011ef40c3b16ac5cd888ede85e54165d 100644
--- a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
+++ b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
@@ -19,6 +19,7 @@ / {

aliases {
ethernet0 = &ethernet2;
+ ethernet1 = &ethernet1;
serial0 = &usart2;
serial1 = &usart6;
};
@@ -133,6 +134,29 @@ dcmipp_0: endpoint {
};
};

+&ethernet1 {
+ pinctrl-0 = <&eth1_rgmii_pins_a &eth1_mdio_pins_a>;
+ pinctrl-1 = <&eth1_rgmii_sleep_pins_a &eth1_mdio_sleep_pins_a>;
+ pinctrl-names = "default", "sleep";
+ phy-handle = <&phy1_eth1>;
+ phy-mode = "rgmii-id";
+ st,ext-phyclk;
+ status = "okay";
+
+ mdio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "snps,dwmac-mdio";
+ phy1_eth1: ethernet-phy@4 {
+ compatible = "ethernet-phy-id001c.c916";
+ reg = <4>;
+ reset-gpios = <&gpioj 9 GPIO_ACTIVE_LOW>;
+ reset-assert-us = <10000>;
+ reset-deassert-us = <80000>;
+ };
+ };
+};
+
&ethernet2 {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&eth2_rgmii_pins_a>;

--
2.25.1