//modified the device tree file in kernel

   ethernet0: ethernet@5800a000 {
       compatible = "st,stm32mp1-dwmac", "snps,dwmac-4.20a";
       reg = <0x5800a000 0x2000>;
       reg-names = "stmmaceth";
       interrupts-extended = <&intc GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>,
                                          <&intc GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>,
                                          <&exti 70 1>;
       interrupt-names = "macirq",
                                    "eth_wake_irq",
                                    "stm32_pwr_wakeup";
       clock-names = "stmmaceth",
                               "mac-clk-tx",
                               "mac-clk-rx",
                              "ethstp";
       clocks = <&rcc ETHMAC>,
                     <&rcc ETHTX>,
                     <&rcc ETHRX>,
                     <&rcc ETHSTP>;
       st,syscon = <&syscfg 0x4>;
       snps,mixed-burst;
       snps,pbl = <2>;
       snps,en-tx-lpi-clockgating;
       snps,axi-config = <&stmmac_axi_config_0>;
       snps,tso;
       power-domains = <&pd_core>;
       status = "disabled";
};

&ethernet0 {
	status = "okay";
	pinctrl-0 = <&ethernet0_rmii_pins_a>;
	pinctrl-1 = <&ethernet0_rmii_sleep_pins_a>;
	pinctrl-names = "default", "sleep";
	phy-mode = "rmii";
	max-speed = <100>;
	phy-handle = <&phy0>;
	nvmem-cells = <&ethernet_mac_address>;
	nvmem-cell-names = "mac-address";	
	snps,reset-gpio = <&gpiog 2 GPIO_ACTIVE_LOW>;
	snps,reset-active-low;
	snps,reset-delays-us = <0 10000 1000000>;
	mdio0 {
			 #address-cells = <1>;
			 #size-cells = <0>;
			 compatible = "snps,dwmac-mdio";
			 phy0: ethernet-phy@0 {
												reg = <0>;
											interrupt-parent = <&gpiog>;
											interrupts = <12 IRQ_TYPE_LEVEL_LOW>;
											pinctrl-names = "default";	
		 };
	};
};