ARM: dts: stm32: Add ethernet support for DH STM32MP13xx DHCOR DHSBC board

Add ethernet support for the DH STM32MP13xx DHCOR DHSBC carrier board.
This carrier board is populated with two gigabit ethernet ports and two
Realtek RTL8211F PHYs, both are described in this DT patch.

Signed-off-by: Marek Vasut <[email protected]>
Signed-off-by: Alexandre Torgue <[email protected]>

Author: Marek Vasut

arch/arm/boot/dts/st/stm32mp135f-dhcor-dhsbc.dts

@@ -22,6 +22,8 @@
 		     "st,stm32mp135";
 
 	aliases {
+		ethernet0 = &ethernet1;
+		ethernet1 = &ethernet2;
 		serial2 = &usart1;
 		serial3 = &usart2;
 	};
@@ -72,6 +74,60 @@
 	};
 };
 
+&ethernet1 {
+	phy-handle = <&ethphy1>;
+	phy-mode = "rgmii-id";
+	pinctrl-0 = <&eth1_rgmii_pins_a>;
+	pinctrl-1 = <&eth1_rgmii_sleep_pins_a>;
+	pinctrl-names = "default", "sleep";
+	st,ext-phyclk;
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "snps,dwmac-mdio";
+
+		ethphy1: ethernet-phy@1 {
+			/* RTL8211F */
+			compatible = "ethernet-phy-id001c.c916";
+			interrupt-parent = <&gpiog>;
+			interrupts = <12 IRQ_TYPE_LEVEL_LOW>;
+			reg = <1>;
+			reset-assert-us = <15000>;
+			reset-deassert-us = <55000>;
+			reset-gpios = <&gpioa 11 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&ethernet2 {
+	phy-handle = <&ethphy2>;
+	phy-mode = "rgmii-id";
+	pinctrl-0 = <&eth2_rgmii_pins_a>;
+	pinctrl-1 = <&eth2_rgmii_sleep_pins_a>;
+	pinctrl-names = "default", "sleep";
+	st,ext-phyclk;
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "snps,dwmac-mdio";
+
+		ethphy2: ethernet-phy@1 {
+			/* RTL8211F */
+			compatible = "ethernet-phy-id001c.c916";
+			interrupt-parent = <&gpiog>;
+			interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
+			reg = <1>;
+			reset-assert-us = <15000>;
+			reset-deassert-us = <55000>;
+			reset-gpios = <&gpiog 8 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
 &gpioa {
 	gpio-line-names = "", "", "", "",
 			  "", "DHSBC_USB_PWR_CC1", "", "",