Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/net/cpsw.txt
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1 TI SoC Ethernet Switch Controller Device Tree Bindings 2 ------------------------------------------------------ 3 4 Required 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 its binding. 24 Note that in legacy cases cpsw-phy-sel may be 25 a child device instead of a phandle 26 (DEPRECATED, use phys property instead). 27 28 Optional properties: 29 - ti,hwmods : Must be "cpgmac0" 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 - cpts_clock_mult : Numerator to convert input clock ticks into nanoseconds 40 - cpts_clock_shift : Denominator to convert input clock ticks into nanoseconds 41 Mult and shift will be calculated basing on CPTS 42 rftclk frequency if both cpts_clock_shift and 43 cpts_clock_mult properties are not provided. 44 45 Slave Properties: 46 Required properties: 47 - phy-mode : See ethernet.txt file in the same directory 48 - phys : phandle on phy-gmii-sel PHY (see phy/ti-phy-gmii-sel.txt) 49 50 Optional properties: 51 - dual_emac_res_vlan : Specifies VID to be used to segregate the ports 52 - phy_id : Specifies slave phy id (deprecated, use phy-handle) 53 - phy-handle : See ethernet.txt file in the same directory 54 55 The MAC address will be determined using the optional properties 56 defined in ethernet.txt. 57 58 Slave sub-nodes: 59 - fixed-link : See fixed-link.txt file in the same directory 60 61 Note: Exactly one of phy_id, phy-handle, or fixed-link must be specified. 62 63 Note: "ti,hwmods" field is used to fetch the base address and irq 64 resources from TI, omap hwmod data base during device registration. 65 Future plan is to migrate hwmod data base contents into device tree 66 blob so that, all the required data will be used from device tree dts 67 file. 68 69 Examples: 70 71 mac: ethernet@4a100000 { 72 compatible = "ti,cpsw"; 73 reg = <0x4A100000 0x1000>; 74 interrupts = <55 0x4>; 75 interrupt-parent = <&intc>; 76 cpdma_channels = <8>; 77 ale_entries = <1024>; 78 bd_ram_size = <0x2000>; 79 rx_descs = <64>; 80 mac_control = <0x20>; 81 slaves = <2>; 82 active_slave = <0>; 83 cpts_clock_mult = <0x80000000>; 84 cpts_clock_shift = <29>; 85 syscon = <&cm>; 86 cpsw-phy-sel = <&phy_sel>; 87 cpsw_emac0: slave@0 { 88 phy_id = <&davinci_mdio>, <0>; 89 phy-mode = "rgmii-txid"; 90 /* Filled in by U-Boot */ 91 mac-address = [ 00 00 00 00 00 00 ]; 92 phys = <&phy_gmii_sel 1 0>; 93 }; 94 cpsw_emac1: slave@1 { 95 phy_id = <&davinci_mdio>, <1>; 96 phy-mode = "rgmii-txid"; 97 /* Filled in by U-Boot */ 98 mac-address = [ 00 00 00 00 00 00 ]; 99 phys = <&phy_gmii_sel 2 0>; 100 }; 101 }; 102 103 (or) 104 mac: ethernet@4a100000 { 105 compatible = "ti,cpsw"; 106 ti,hwmods = "cpgmac0"; 107 cpdma_channels = <8>; 108 ale_entries = <1024>; 109 bd_ram_size = <0x2000>; 110 rx_descs = <64>; 111 mac_control = <0x20>; 112 slaves = <2>; 113 active_slave = <0>; 114 cpts_clock_mult = <0x80000000>; 115 cpts_clock_shift = <29>; 116 syscon = <&cm>; 117 cpsw-phy-sel = <&phy_sel>; 118 cpsw_emac0: slave@0 { 119 phy_id = <&davinci_mdio>, <0>; 120 phy-mode = "rgmii-txid"; 121 /* Filled in by U-Boot */ 122 mac-address = [ 00 00 00 00 00 00 ]; 123 phys = <&phy_gmii_sel 1 0>; 124 }; 125 cpsw_emac1: slave@1 { 126 phy_id = <&davinci_mdio>, <1>; 127 phy-mode = "rgmii-txid"; 128 /* Filled in by U-Boot */ 129 mac-address = [ 00 00 00 00 00 00 ]; 130 phys = <&phy_gmii_sel 2 0>; 131 }; 132 };
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