FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/net/arc_emac.txt

     * Synopsys ARC EMAC 10/100 Ethernet driver (EMAC)
     
     Required properties:
     - compatible: Should be "snps,arc-emac"
     - reg: Address and length of the register set for the device
     - interrupts: Should contain the EMAC interrupts
     - max-speed: see ethernet.txt file in the same directory.
     - phy: see ethernet.txt file in the same directory.
     
    Optional properties:
    - phy-reset-gpios : Should specify the gpio for phy reset
    - phy-reset-duration : Reset duration in milliseconds.  Should present
      only if property "phy-reset-gpios" is available.  Missing the property
      will have the duration be 1 millisecond.  Numbers greater than 1000 are
      invalid and 1 millisecond will be used instead.
    
    Clock handling:
    The clock frequency is needed to calculate and set polling period of EMAC.
    It must be provided by one of:
    - clock-frequency: CPU frequency.
    - clocks: reference to the clock supplying the EMAC.
    
    Child nodes of the driver are the individual PHY devices connected to the
    MDIO bus. They must have a "reg" property given the PHY address on the MDIO bus.
    
    Examples:
    
            ethernet@c0fc2000 {
                    compatible = "snps,arc-emac";
                    reg = <0xc0fc2000 0x3c>;
                    interrupts = <6>;
                    mac-address = [ 00 11 22 33 44 55 ];
    
                    clock-frequency = <80000000>;
                    /* or */
                    clocks = <&emac_clock>;
    
                    max-speed = <100>;
                    phy = <&phy0>;
    
                    #address-cells = <1>;
                    #size-cells = <0>;
                    phy0: ethernet-phy@0 {
                            reg = <1>;
                    };
            };

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