rockchip/rk3588/rp-eth-gmac0.dtsi

&mdio0 {
    rgmii_phy0: phy@1 {
        compatible = "ethernet-phy-ieee802.3-c22";
        reg = <0x1>;
    };
};

&gmac0 {
    // Use rgmii-rxid mode to disable rx delay inside Soc
    phy-mode = "rgmii-rxid";
    clock_in_out = "input";

    snps,reset-gpio = <&gpio2 RK_PC4 GPIO_ACTIVE_LOW>;
    snps,reset-active-low;
    // Reset time is 20ms, 100ms for rtl8211f 
    snps,reset-delays-us = <0 20000 100000>;

    pinctrl-names = "default";
    pinctrl-0 = <&gmac0_miim
             &gmac0_tx_bus2
             &gmac0_rx_bus2
             &gmac0_rgmii_clk
             &gmac0_rgmii_bus
            &gmac0_clkinout
            &eth0_pins>;

    tx_delay = <0x44>;
    // rx_delay = <0x4f>; 

    phy-handle = <&rgmii_phy0>;
    status = "okay";
};