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- rx_descs : Specifies number of Rx descriptors 19- mac_control : Specifies Default MAC control register content 20 for the specific platform 21- slaves : Specifies number for slaves 22- active_slave : Specifies the slave to use for time stamping, 23 ethtool and SIOCGMIIPHY 24- cpts_clock_mult : Numerator to convert input clock ticks into nanoseconds 25- cpts_clock_shift : Denominator to convert input clock ticks into nanoseconds 26 27Optional properties: 28- ti,hwmods : Must be "cpgmac0" 29- no_bd_ram : Must be 0 or 1 30- dual_emac : Specifies Switch to act as Dual EMAC 31- syscon : Phandle to the system control device node, which is 32 the control module device of the am33x 33- mode-gpios : Should be added if one/multiple gpio lines are 34 required to be driven so that cpsw data lines 35 can be connected to the phy via selective mux. 36 For example in dra72x-evm, pcf gpio has to be 37 driven low so that cpsw slave 0 and phy data 38 lines are connected via mux. 39 40 41Slave Properties: 42Required properties: 43- phy_id : Specifies slave phy id 44- phy-mode : See ethernet.txt file in the same directory 45 46Optional properties: 47- dual_emac_res_vlan : Specifies VID to be used to segregate the ports 48- mac-address : See ethernet.txt file in the same directory 49- phy-handle : See ethernet.txt file in the same directory 50 51Slave sub-nodes: 52- fixed-link : See fixed-link.txt file in the same directory 53 Either the properties phy_id and phy-mode, 54 or the sub-node fixed-link can be specified 55 56Note: "ti,hwmods" field is used to fetch the base address and irq 57resources from TI, omap hwmod data base during device registration. 58Future plan is to migrate hwmod data base contents into device tree 59blob so that, all the required data will be used from device tree dts 60file. 61 62Examples: 63 64 mac: ethernet@4A100000 { 65 compatible = "ti,cpsw"; 66 reg = <0x4A100000 0x1000>; 67 interrupts = <55 0x4>; 68 interrupt-parent = <&intc>; 69 cpdma_channels = <8>; 70 ale_entries = <1024>; 71 bd_ram_size = <0x2000>; 72 no_bd_ram = <0>; 73 rx_descs = <64>; 74 mac_control = <0x20>; 75 slaves = <2>; 76 active_slave = <0>; 77 cpts_clock_mult = <0x80000000>; 78 cpts_clock_shift = <29>; 79 syscon = <&cm>; 80 cpsw_emac0: slave@0 { 81 phy_id = <&davinci_mdio>, <0>; 82 phy-mode = "rgmii-txid"; 83 /* Filled in by U-Boot */ 84 mac-address = [ 00 00 00 00 00 00 ]; 85 }; 86 cpsw_emac1: slave@1 { 87 phy_id = <&davinci_mdio>, <1>; 88 phy-mode = "rgmii-txid"; 89 /* Filled in by U-Boot */ 90 mac-address = [ 00 00 00 00 00 00 ]; 91 }; 92 }; 93 94(or) 95 mac: ethernet@4A100000 { 96 compatible = "ti,cpsw"; 97 ti,hwmods = "cpgmac0"; 98 cpdma_channels = <8>; 99 ale_entries = <1024>; 100 bd_ram_size = <0x2000>; 101 no_bd_ram = <0>; 102 rx_descs = <64>; 103 mac_control = <0x20>; 104 slaves = <2>; 105 active_slave = <0>; 106 cpts_clock_mult = <0x80000000>; 107 cpts_clock_shift = <29>; 108 syscon = <&cm>; 109 cpsw_emac0: slave@0 { 110 phy_id = <&davinci_mdio>, <0>; 111 phy-mode = "rgmii-txid"; 112 /* Filled in by U-Boot */ 113 mac-address = [ 00 00 00 00 00 00 ]; 114 }; 115 cpsw_emac1: slave@1 { 116 phy_id = <&davinci_mdio>, <1>; 117 phy-mode = "rgmii-txid"; 118 /* Filled in by U-Boot */ 119 mac-address = [ 00 00 00 00 00 00 ]; 120 }; 121 }; 122