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- cpdma_channels : Specifies number of channels in CPDMA 15- ale_entries : Specifies No of entries ALE can hold 16- bd_ram_size : Specifies internal descriptor RAM size 17- mac_control : Specifies Default MAC control register content 18 for the specific platform 19- slaves : Specifies number for slaves 20- active_slave : Specifies the slave to use for time stamping, 21 ethtool and SIOCGMIIPHY 22- cpsw-phy-sel : Specifies the phandle to the CPSW phy mode selection 23 device. See also cpsw-phy-sel.txt for it's binding. 24 Note that in legacy cases cpsw-phy-sel may be 25 a child device instead of a phandle. 26 27Optional properties: 28- ti,hwmods : Must be "cpgmac0" 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- cpts_clock_mult : Numerator to convert input clock ticks into nanoseconds 39- cpts_clock_shift : Denominator to convert input clock ticks into nanoseconds 40 Mult and shift will be calculated basing on CPTS 41 rftclk frequency if both cpts_clock_shift and 42 cpts_clock_mult properties are not provided. 43 44Slave Properties: 45Required properties: 46- phy-mode : See ethernet.txt file in the same directory 47 48Optional properties: 49- dual_emac_res_vlan : Specifies VID to be used to segregate the ports 50- mac-address : See ethernet.txt file in the same directory 51- phy_id : Specifies slave phy id (deprecated, use phy-handle) 52- phy-handle : See ethernet.txt file in the same directory 53 54Slave sub-nodes: 55- fixed-link : See fixed-link.txt file in the same directory 56 57Note: Exactly one of phy_id, phy-handle, or fixed-link must be specified. 58 59Note: "ti,hwmods" field is used to fetch the base address and irq 60resources from TI, omap hwmod data base during device registration. 61Future plan is to migrate hwmod data base contents into device tree 62blob so that, all the required data will be used from device tree dts 63file. 64 65Examples: 66 67 mac: ethernet@4a100000 { 68 compatible = "ti,cpsw"; 69 reg = <0x4A100000 0x1000>; 70 interrupts = <55 0x4>; 71 interrupt-parent = <&intc>; 72 cpdma_channels = <8>; 73 ale_entries = <1024>; 74 bd_ram_size = <0x2000>; 75 rx_descs = <64>; 76 mac_control = <0x20>; 77 slaves = <2>; 78 active_slave = <0>; 79 cpts_clock_mult = <0x80000000>; 80 cpts_clock_shift = <29>; 81 syscon = <&cm>; 82 cpsw-phy-sel = <&phy_sel>; 83 cpsw_emac0: slave@0 { 84 phy_id = <&davinci_mdio>, <0>; 85 phy-mode = "rgmii-txid"; 86 /* Filled in by U-Boot */ 87 mac-address = [ 00 00 00 00 00 00 ]; 88 }; 89 cpsw_emac1: slave@1 { 90 phy_id = <&davinci_mdio>, <1>; 91 phy-mode = "rgmii-txid"; 92 /* Filled in by U-Boot */ 93 mac-address = [ 00 00 00 00 00 00 ]; 94 }; 95 }; 96 97(or) 98 mac: ethernet@4a100000 { 99 compatible = "ti,cpsw"; 100 ti,hwmods = "cpgmac0"; 101 cpdma_channels = <8>; 102 ale_entries = <1024>; 103 bd_ram_size = <0x2000>; 104 rx_descs = <64>; 105 mac_control = <0x20>; 106 slaves = <2>; 107 active_slave = <0>; 108 cpts_clock_mult = <0x80000000>; 109 cpts_clock_shift = <29>; 110 syscon = <&cm>; 111 cpsw-phy-sel = <&phy_sel>; 112 cpsw_emac0: slave@0 { 113 phy_id = <&davinci_mdio>, <0>; 114 phy-mode = "rgmii-txid"; 115 /* Filled in by U-Boot */ 116 mac-address = [ 00 00 00 00 00 00 ]; 117 }; 118 cpsw_emac1: slave@1 { 119 phy_id = <&davinci_mdio>, <1>; 120 phy-mode = "rgmii-txid"; 121 /* Filled in by U-Boot */ 122 mac-address = [ 00 00 00 00 00 00 ]; 123 }; 124 }; 125