* 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>; }; };