1TI SoC Ethernet Switch Controller Device Tree Bindings 2------------------------------------------------------ 3 4Required properties: 5- compatible : Should be one of the below:- 6 "ti,cpsw" for backward compatible 7 "ti,am335x-cpsw" for AM335x controllers 8 "ti,am4372-cpsw" for AM437x controllers 9 "ti,dra7-cpsw" for DRA7x controllers 10- reg : physical base address and size of the cpsw 11 registers map 12- interrupts : property with a value describing the interrupt 13 number 14- interrupt-parent : The parent interrupt controller 15- cpdma_channels : Specifies number of channels in CPDMA 16- ale_entries : Specifies No of entries ALE can hold 17- bd_ram_size : Specifies internal descriptor RAM size 18- mac_control : Specifies Default MAC control register content 19 for the specific platform 20- slaves : Specifies number for slaves 21- active_slave : Specifies the slave to use for time stamping, 22 ethtool and SIOCGMIIPHY 23- cpts_clock_mult : Numerator to convert input clock ticks into nanoseconds 24- cpts_clock_shift : Denominator to convert input clock ticks into nanoseconds 25 26Optional properties: 27- ti,hwmods : Must be "cpgmac0" 28- no_bd_ram : Must be 0 or 1 29- dual_emac : Specifies Switch to act as Dual EMAC 30- syscon : Phandle to the system control device node, which is 31 the control module device of the am33x 32- mode-gpios : Should be added if one/multiple gpio lines are 33 required to be driven so that cpsw data lines 34 can be connected to the phy via selective mux. 35 For example in dra72x-evm, pcf gpio has to be 36 driven low so that cpsw slave 0 and phy data 37 lines are connected via mux. 38 39 40Slave Properties: 41Required properties: 42- phy-mode : See ethernet.txt file in the same directory 43 44Optional properties: 45- dual_emac_res_vlan : Specifies VID to be used to segregate the ports 46- mac-address : See ethernet.txt file in the same directory 47- phy_id : Specifies slave phy id (deprecated, use phy-handle) 48- phy-handle : See ethernet.txt file in the same directory 49 50Slave sub-nodes: 51- fixed-link : See fixed-link.txt file in the same directory 52 53Note: Exactly one of phy_id, phy-handle, or fixed-link must be specified. 54 55Note: "ti,hwmods" field is used to fetch the base address and irq 56resources from TI, omap hwmod data base during device registration. 57Future plan is to migrate hwmod data base contents into device tree 58blob so that, all the required data will be used from device tree dts 59file. 60 61Examples: 62 63 mac: ethernet@4A100000 { 64 compatible = "ti,cpsw"; 65 reg = <0x4A100000 0x1000>; 66 interrupts = <55 0x4>; 67 interrupt-parent = <&intc>; 68 cpdma_channels = <8>; 69 ale_entries = <1024>; 70 bd_ram_size = <0x2000>; 71 no_bd_ram = <0>; 72 rx_descs = <64>; 73 mac_control = <0x20>; 74 slaves = <2>; 75 active_slave = <0>; 76 cpts_clock_mult = <0x80000000>; 77 cpts_clock_shift = <29>; 78 syscon = <&cm>; 79 cpsw_emac0: slave@0 { 80 phy_id = <&davinci_mdio>, <0>; 81 phy-mode = "rgmii-txid"; 82 /* Filled in by U-Boot */ 83 mac-address = [ 00 00 00 00 00 00 ]; 84 }; 85 cpsw_emac1: slave@1 { 86 phy_id = <&davinci_mdio>, <1>; 87 phy-mode = "rgmii-txid"; 88 /* Filled in by U-Boot */ 89 mac-address = [ 00 00 00 00 00 00 ]; 90 }; 91 }; 92 93(or) 94 mac: ethernet@4A100000 { 95 compatible = "ti,cpsw"; 96 ti,hwmods = "cpgmac0"; 97 cpdma_channels = <8>; 98 ale_entries = <1024>; 99 bd_ram_size = <0x2000>; 100 no_bd_ram = <0>; 101 rx_descs = <64>; 102 mac_control = <0x20>; 103 slaves = <2>; 104 active_slave = <0>; 105 cpts_clock_mult = <0x80000000>; 106 cpts_clock_shift = <29>; 107 syscon = <&cm>; 108 cpsw_emac0: slave@0 { 109 phy_id = <&davinci_mdio>, <0>; 110 phy-mode = "rgmii-txid"; 111 /* Filled in by U-Boot */ 112 mac-address = [ 00 00 00 00 00 00 ]; 113 }; 114 cpsw_emac1: slave@1 { 115 phy_id = <&davinci_mdio>, <1>; 116 phy-mode = "rgmii-txid"; 117 /* Filled in by U-Boot */ 118 mac-address = [ 00 00 00 00 00 00 ]; 119 }; 120 }; 121