tree 96df370e65455d91448838caf7206a7e0282a726
parent e3be24d2d4b06420b474b738c49eba865aed2c93
author developer <developer@mediatek.com> 1659455269 +0800
committer developer <developer@mediatek.com> 1659489659 +0800

[][Add Airoha EN8801SC Giga Etherent phy support]

[Description]
Add Airoha EN8801SC Giga Etherent phy support for MT7981.

1. dts example to connect 2nd GMAC and EN8801SC gphy.

gmac1: mac@1 {
    compatible = "mediatek,eth-mac";
    reg = <1>;
    phy-mode = "sgmii";
    phy-handle = <&phy0>;       // add phy handler
};

mdio: mdio-bus {
    #address-cells = <1>;
    #size-cells = <0>;

    phy0: ethernet-phy@0 {
        compatible = "ethernet-phy-id03a2.9471";    // define phy id
        reg = <24>;             // set phy address to 0x18
        phy-mode = "sgmii";
    };
};

2. After bootup, mii_mgr command can be used to access PHY CR.
For example, reading clause 22 PHY ID
mii_mgr -g -p 18 -r 2
mii_mgr -g -p 18 -r 3

[Release-log]
N/A

Change-Id: I3badca2c5d54ef1ebeae459ac6dd240060d84be0
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6325268