Re: [PATCH 3/3] arm64: dts: freescale: Add device tree for Emcraft Systems NavQ+ Kit

[Andrew Lunn <andrew@xxxxxxx>]

> +&eqos {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_eqos>;
> +	phy-mode = "rgmii-id";
> +	phy-handle = <&ethphy0>;
> +	status = "okay";
> +
> +	mdio {
> +		compatible = "snps,dwmac-mdio";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		ethphy0: ethernet-phy@0 {
> +			compatible = "ethernet-phy-ieee802.3-c22";
> +			reg = <0>;
> +			reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;
> +			reset-assert-us = <1000>;
> +			reset-deassert-us = <10000>;
> +			qca,disable-smarteee;
> +			qca,disable-hibernation-mode;
> +			vddio-supply = <&vddio>;
> +
> +			vddio: vddio-regulator {
> +				regulator-min-microvolt = <1800000>;
> +				regulator-max-microvolt = <1800000>;
> +			};

Please could you explain what this last node is doing.

       Andrew