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 24Optional properties: 25- ti,hwmods : Must be "cpgmac0" 26- dual_emac : Specifies Switch to act as Dual EMAC 27- syscon : Phandle to the system control device node, which is 28 the control module device of the am33x 29- mode-gpios : Should be added if one/multiple gpio lines are 30 required to be driven so that cpsw data lines 31 can be connected to the phy via selective mux. 32 For example in dra72x-evm, pcf gpio has to be 33 driven low so that cpsw slave 0 and phy data 34 lines are connected via mux. 35- cpts_clock_mult : Numerator to convert input clock ticks into nanoseconds 36- cpts_clock_shift : Denominator to convert input clock ticks into nanoseconds 37 Mult and shift will be calculated basing on CPTS 38 rftclk frequency if both cpts_clock_shift and 39 cpts_clock_mult properties are not provided. 40 41Slave Properties: 42Required properties: 43- phy-mode : See ethernet.txt file in the same directory 44 45Optional properties: 46- dual_emac_res_vlan : Specifies VID to be used to segregate the ports 47- mac-address : See ethernet.txt file in the same directory 48- phy_id : Specifies slave phy id (deprecated, use phy-handle) 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 54Note: Exactly one of phy_id, phy-handle, or fixed-link must 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 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 rx_descs = <64>; 101 mac_control = <0x20>; 102 slaves = <2>; 103 active_slave = <0>; 104 cpts_clock_mult = <0x80000000>; 105 cpts_clock_shift = <29>; 106 syscon = <&cm>; 107 cpsw_emac0: slave@0 { 108 phy_id = <&davinci_mdio>, <0>; 109 phy-mode = "rgmii-txid"; 110 /* Filled in by U-Boot */ 111 mac-address = [ 00 00 00 00 00 00 ]; 112 }; 113 cpsw_emac1: slave@1 { 114 phy_id = <&davinci_mdio>, <1>; 115 phy-mode = "rgmii-txid"; 116 /* Filled in by U-Boot */ 117 mac-address = [ 00 00 00 00 00 00 ]; 118 }; 119 }; 120