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 23Optional properties: 24- ti,hwmods : Must be "cpgmac0" 25- dual_emac : Specifies Switch to act as Dual EMAC 26- syscon : Phandle to the system control device node, which is 27 the control module device of the am33x 28- mode-gpios : Should be added if one/multiple gpio lines are 29 required to be driven so that cpsw data lines 30 can be connected to the phy via selective mux. 31 For example in dra72x-evm, pcf gpio has to be 32 driven low so that cpsw slave 0 and phy data 33 lines are connected via mux. 34- cpts_clock_mult : Numerator to convert input clock ticks into nanoseconds 35- cpts_clock_shift : Denominator to convert input clock ticks into nanoseconds 36 Mult and shift will be calculated basing on CPTS 37 rftclk frequency if both cpts_clock_shift and 38 cpts_clock_mult properties are not provided. 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 rx_descs = <64>; 72 mac_control = <0x20>; 73 slaves = <2>; 74 active_slave = <0>; 75 cpts_clock_mult = <0x80000000>; 76 cpts_clock_shift = <29>; 77 syscon = <&cm>; 78 cpsw_emac0: slave@0 { 79 phy_id = <&davinci_mdio>, <0>; 80 phy-mode = "rgmii-txid"; 81 /* Filled in by U-Boot */ 82 mac-address = [ 00 00 00 00 00 00 ]; 83 }; 84 cpsw_emac1: slave@1 { 85 phy_id = <&davinci_mdio>, <1>; 86 phy-mode = "rgmii-txid"; 87 /* Filled in by U-Boot */ 88 mac-address = [ 00 00 00 00 00 00 ]; 89 }; 90 }; 91 92(or) 93 mac: ethernet@4a100000 { 94 compatible = "ti,cpsw"; 95 ti,hwmods = "cpgmac0"; 96 cpdma_channels = <8>; 97 ale_entries = <1024>; 98 bd_ram_size = <0x2000>; 99 rx_descs = <64>; 100 mac_control = <0x20>; 101 slaves = <2>; 102 active_slave = <0>; 103 cpts_clock_mult = <0x80000000>; 104 cpts_clock_shift = <29>; 105 syscon = <&cm>; 106 cpsw_emac0: slave@0 { 107 phy_id = <&davinci_mdio>, <0>; 108 phy-mode = "rgmii-txid"; 109 /* Filled in by U-Boot */ 110 mac-address = [ 00 00 00 00 00 00 ]; 111 }; 112 cpsw_emac1: slave@1 { 113 phy_id = <&davinci_mdio>, <1>; 114 phy-mode = "rgmii-txid"; 115 /* Filled in by U-Boot */ 116 mac-address = [ 00 00 00 00 00 00 ]; 117 }; 118 }; 119