bpi m2z / eth0

bananapi-m2-zero-eth0.dts

/dts-v1/;
/plugin/;

/ {
    model = "Banana Pi BPI-M2-Zero";
    compatible = "sinovoip,bpi-m2-zero", "allwinner,sun8i-h2-plus";

    fragment@0 {
        target-path = "/aliases";
        __overlay__ {
            ethernet0 = "/soc/ethernet@1c30000";
        };
    };

    fragment@1 {
        target = <&emac>;
        __overlay__ {
            status = "okay";
            phy-handle = <&int_mii_phy>;
            phy-mode = "mii";
            allwinner,leds-active-low;
        };
    };
};

dtc-compile.sh

#!/bin/sh -e

DIR="$PWD"
export GIT_SSL_NO_VERIFY=1

check_dpkg () {
  LC_ALL=C dpkg --list | awk '{print $2}' | grep "^${pkg}" >/dev/null || deb_pkgs="${deb_pkgs}${pkg} "
}

dtc_git_build () {
  project="dtc"
  server="https://git.kernel.org/pub/scm/utils/dtc/dtc.git"

  if [ ! -d ${HOME}/git/ ] ; then
    mkdir -p ${HOME}/git/ || true
  fi

  if [ ! -f ${HOME}/git/${project}/.git/config ] ; then
    git clone ${server} ${HOME}/git/${project}/
  fi

  cd ${HOME}/git/${project}/
  make clean
  git checkout master -f
  git pull || true

  if [ ! "x${git_tag}" = "x" ] ; then
    test_for_branch=$(git branch --list ${git_tag}-build)
    if [ "x${test_for_branch}" != "x" ] ; then
      git branch ${git_tag}-build -D
    fi

    git checkout ${git_tag} -b ${git_tag}-build
  fi

  make clean
  make PREFIX=/usr/local/ CC=gcc CROSS_COMPILE= all
  echo "Installing into: /usr/local/bin/"
  sudo make PREFIX=/usr/local/ install
  sudo ln -sf /usr/local/bin/dtc /usr/bin/dtc
  echo "dtc: `/usr/bin/dtc --version`"
}

unset deb_pkgs
pkg="bison"
check_dpkg
pkg="build-essential"
check_dpkg
pkg="flex"
check_dpkg
pkg="git"
check_dpkg

if [ "${deb_pkgs}" ] ; then
  echo "Installing: ${deb_pkgs}"
  sudo apt-get update
  sudo apt-get -y install ${deb_pkgs}
  sudo apt-get clean
fi

git_tag="v1.4.7"
dtc_git_build

RUN.md

sudo apt-get -f install --yes

cd /tmp
chmod a+x dtc-compile.sh
./dtc-compile.sh
dtc -I dts -O dtb -o bananapi-m2-zero-eth0.dtbo bananapi-m2-zero-eth0.dts 
sudo mkdir -p /boot/overlay-user
sudo cp /tmp/bananapi-m2-zero-eth0.dtbo /boot/overlay-user
echo "user_overlays=bananapi-m2-zero-eth0" | sudo tee -a /boot/armbianEnv.txt

ls -l /sys/firmware/devicetree/base/soc/eth*

ethtool -s eth0 speed 100 duplex half autoneg off

script.fex

[gmac0]
gmac_used = 1
gmac_rxd3 = port:PD00<2><default><3><default>
gmac_rxd2 = port:PD01<2><default><3><default>
gmac_rxd1 = port:PD02<2><default><3><default>
gmac_rxd0 = port:PD03<2><default><3><default>
gmac_rxclk = port:PD04<2><default><3><default>
gmac_rxdv = port:PD05<2><default><3><default>
gmac_txd3 = port:PD07<2><default><3><default>
gmac_txd2 = port:PD08<2><default><3><default>
gmac_txd1 = port:PD09<2><default><3><default>
gmac_txd0 = port:PD10<2><default><3><default>
gmac_txclk = port:PD12<2><default><3><default>
gmac_txen = port:PD13<2><default><3><default>
gmac_col = port:PD15<2><default><3><default>
gmac_mdc = port:PD16<2><default><3><default>
gmac_mdio = port:PD17<2><default><3><default>
gmac_power1 =

[gmac_phy_power]
gmac_phy_power_en = port:PD06<1><default><default><0>

REFERENCES

• https://lisy.dev/banana-pi-m2-zero.html