Kernel-4.18.0-80.el8_meson-dwmac

• Amlogic Meson DWMAC Ethernet controller

The device inherits all the properties of the dwmac/stmmac devices
described in the file stmmac.txt in the current directory with the
following changes.

Required properties on all platforms:

• compatible: Depending on the platform this should be one of:

        - "amlogic,meson6-dwmac"
        - "amlogic,meson8b-dwmac"
        - "amlogic,meson8m2-dwmac"
        - "amlogic,meson-gxbb-dwmac"
        - "amlogic,meson-axg-dwmac"
    Additionally "snps,dwmac" and any applicable more
    detailed version number described in net/stmmac.txt
    should be used.
  

• reg: The first register range should be the one of the DWMAC
  controller. The second range is is for the Amlogic specific
  configuration (for example the PRG_ETHERNET register range
  on Meson8b and newer)

Required properties on Meson8b, Meson8m2, GXBB and newer:

• clock-names: Should contain the following:

    - "stmmaceth" - see stmmac.txt
    - "clkin0" - first parent clock of the internal mux
    - "clkin1" - second parent clock of the internal mux
  

Optional properties on Meson8b, Meson8m2, GXBB and newer:

• amlogic,tx-delay-ns: The internal RGMII TX clock delay (provided

        by this driver) in nanoseconds. Allowed values
        are: 0ns, 2ns, 4ns, 6ns.
        When phy-mode is set to "rgmii" then the TX
        delay should be explicitly configured. When
        not configured a fallback of 2ns is used.
        When the phy-mode is set to either "rgmii-id"
        or "rgmii-txid" the TX clock delay is already
        provided by the PHY. In that case this
        property should be set to 0ns (which disables
        the TX clock delay in the MAC to prevent the
        clock from going off because both PHY and MAC
        are adding a delay).
        Any configuration is ignored when the phy-mode
        is set to "rmii".
  

Example for Meson6:

ethmac: ethernet@c9410000 {
    compatible = "amlogic,meson6-dwmac", "snps,dwmac";
    reg = <0xc9410000 0x10000
           0xc1108108 0x4>;
    interrupts = <0 8 1>;
    interrupt-names = "macirq";
    clocks = <&clk81>;
    clock-names = "stmmaceth";
}

Example for GXBB:
ethmac: ethernet@c9410000 {
compatible = “amlogic,meson-gxbb-dwmac”, “snps,dwmac”;
reg = <0x0 0xc9410000 0x0 0x10000>,
<0x0 0xc8834540 0x0 0x8>;
interrupts = <0 8 1>;
interrupt-names = “macirq”;
clocks = <&clkc CLKID_ETH>,
<&clkc CLKID_FCLK_DIV2>,
<&clkc CLKID_MPLL2>;
clock-names = “stmmaceth”, “clkin0”, “clkin1”;
phy-mode = “rgmii”;
};