1* Synopsys ARC EMAC 10/100 Ethernet driver (EMAC) 2 3Required properties: 4- compatible: Should be "snps,arc-emac" 5- reg: Address and length of the register set for the device 6- interrupts: Should contain the EMAC interrupts 7- max-speed: see ethernet.txt file in the same directory. 8- phy: see ethernet.txt file in the same directory. 9 10Optional properties: 11- phy-reset-gpios : Should specify the gpio for phy reset 12- phy-reset-duration : Reset duration in milliseconds. Should present 13 only if property "phy-reset-gpios" is available. Missing the property 14 will have the duration be 1 millisecond. Numbers greater than 1000 are 15 invalid and 1 millisecond will be used instead. 16 17Clock handling: 18The clock frequency is needed to calculate and set polling period of EMAC. 19It must be provided by one of: 20- clock-frequency: CPU frequency. 21- clocks: reference to the clock supplying the EMAC. 22 23Child nodes of the driver are the individual PHY devices connected to the 24MDIO bus. They must have a "reg" property given the PHY address on the MDIO bus. 25 26Examples: 27 28 ethernet@c0fc2000 { 29 compatible = "snps,arc-emac"; 30 reg = <0xc0fc2000 0x3c>; 31 interrupts = <6>; 32 mac-address = [ 00 11 22 33 44 55 ]; 33 34 clock-frequency = <80000000>; 35 /* or */ 36 clocks = <&emac_clock>; 37 38 max-speed = <100>; 39 phy = <&phy0>; 40 41 #address-cells = <1>; 42 #size-cells = <0>; 43 phy0: ethernet-phy@0 { 44 reg = <1>; 45 }; 46 }; 47