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1TI SoC Ethernet Switch Controller Device Tree Bindings2------------------------------------------------------3 4Required properties:5- compatible : Should be one of the below:-6 "ti,cpsw" for backward compatible7 "ti,am335x-cpsw" for AM335x controllers8 "ti,am4372-cpsw" for AM437x controllers9 "ti,dra7-cpsw" for DRA7x controllers10- reg : physical base address and size of the cpsw11 registers map12- interrupts : property with a value describing the interrupt13 number14- cpdma_channels : Specifies number of channels in CPDMA15- ale_entries : Specifies No of entries ALE can hold16- bd_ram_size : Specifies internal descriptor RAM size17- mac_control : Specifies Default MAC control register content18 for the specific platform19- slaves : Specifies number for slaves20- active_slave : Specifies the slave to use for time stamping,21 ethtool and SIOCGMIIPHY22- cpsw-phy-sel : Specifies the phandle to the CPSW phy mode selection23 device. See also cpsw-phy-sel.txt for its binding.24 Note that in legacy cases cpsw-phy-sel may be25 a child device instead of a phandle26 (DEPRECATED, use phys property instead).27 28Optional properties:29- ti,hwmods : Must be "cpgmac0"30- dual_emac : Specifies Switch to act as Dual EMAC31- syscon : Phandle to the system control device node, which is32 the control module device of the am33x33- mode-gpios : Should be added if one/multiple gpio lines are34 required to be driven so that cpsw data lines35 can be connected to the phy via selective mux.36 For example in dra72x-evm, pcf gpio has to be37 driven low so that cpsw slave 0 and phy data38 lines are connected via mux.39- cpts_clock_mult : Numerator to convert input clock ticks into nanoseconds40- cpts_clock_shift : Denominator to convert input clock ticks into nanoseconds41 Mult and shift will be calculated basing on CPTS42 rftclk frequency if both cpts_clock_shift and43 cpts_clock_mult properties are not provided.44 45Slave Properties:46Required properties:47- phy-mode : See ethernet.txt file in the same directory48- phys : phandle on phy-gmii-sel PHY (see phy/ti-phy-gmii-sel.txt)49 50Optional properties:51- dual_emac_res_vlan : Specifies VID to be used to segregate the ports52- phy_id : Specifies slave phy id (deprecated, use phy-handle)53- phy-handle : See ethernet.txt file in the same directory54 55The MAC address will be determined using the optional properties56defined in ethernet.txt.57 58Slave sub-nodes:59- fixed-link : See fixed-link.txt file in the same directory60 61Note: Exactly one of phy_id, phy-handle, or fixed-link must be specified.62 63Note: "ti,hwmods" field is used to fetch the base address and irq64resources from TI, omap hwmod data base during device registration.65Future plan is to migrate hwmod data base contents into device tree66blob so that, all the required data will be used from device tree dts67file.68 69Examples: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 };133