boards: st: nucleo_h7s3l8: Add ethernet

Enable support for ethernet on nucleo_h7s3l8 board.

Signed-off-by: Thomas Decker <decker@jb-lighting.de>

Author: TD-JBL

boards/st/nucleo_h7s3l8/doc/index.rst

@@ -162,6 +162,7 @@ and a ST morpho connector. Board is configured as follows:
 - I2C : PB8, PB9
 - SPI1 NSS/SCK/MISO/MOSI : PD14PA5/PA6/PB5 (Arduino SPI)
 - FDCAN1 RX/TX : PD0, PD1
+- ETH : A2, A7, B6, G4, G5, G6, G11, G12, G13
 
 System Clock
 ------------

boards/st/nucleo_h7s3l8/nucleo_h7s3l8.dts

@@ -175,6 +175,31 @@
 	status = "okay";
 };
 
+&mac {
+	pinctrl-0 = <&eth_rmii_rxd0_pg4
+		     &eth_rmii_rxd1_pg5
+		     &eth_rmii_ref_clk_pb6
+		     &eth_rmii_crs_dv_pa7
+		     &eth_rmii_tx_en_pg11
+		     &eth_rmii_txd0_pg13
+		     &eth_rmii_txd1_pg12>;
+	pinctrl-names = "default";
+	phy-connection-type = "rmii";
+	phy-handle = <&eth_phy>;
+	status = "okay";
+};
+
+&mdio {
+	pinctrl-0 = <&eth_mdio_pa2 &eth_mdc_pg6>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	eth_phy: ethernet-phy@0 {
+		compatible = "ethernet-phy";
+		reg = <0x00>;
+	};
+};
+
 &flash0 {
 	partitions {
 		compatible = "fixed-partitions";

boards/st/nucleo_h7s3l8/nucleo_h7s3l8.yaml

@@ -15,4 +15,5 @@ supported:
   - octospi
   - can
   - canfd
+  - netif:eth
 vendor: st