linux/Documentation/devicetree/bindings/net/stmmac.txt
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   1* STMicroelectronics 10/100/1000 Ethernet driver (GMAC)
   2
   3Required properties:
   4- compatible: Should be "snps,dwmac-<ip_version>" "snps,dwmac"
   5        For backwards compatibility: "st,spear600-gmac" is also supported.
   6- reg: Address and length of the register set for the device
   7- interrupt-parent: Should be the phandle for the interrupt controller
   8  that services interrupts for this device
   9- interrupts: Should contain the STMMAC interrupts
  10- interrupt-names: Should contain the interrupt names "macirq"
  11  "eth_wake_irq" if this interrupt is supported in the "interrupts"
  12  property
  13- phy-mode: String, operation mode of the PHY interface.
  14  Supported values are: "mii", "rmii", "gmii", "rgmii".
  15
  16Optional properties:
  17- mac-address: 6 bytes, mac address
  18
  19Examples:
  20
  21        gmac0: ethernet@e0800000 {
  22                compatible = "st,spear600-gmac";
  23                reg = <0xe0800000 0x8000>;
  24                interrupt-parent = <&vic1>;
  25                interrupts = <24 23>;
  26                interrupt-names = "macirq", "eth_wake_irq";
  27                mac-address = [000000000000]; /* Filled in by U-Boot */
  28                phy-mode = "gmii";
  29        };
  30