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Diffstat (limited to 'dts/Bindings/net/marvell-orion-net.txt')
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diff --git a/dts/Bindings/net/marvell-orion-net.txt b/dts/Bindings/net/marvell-orion-net.txt new file mode 100644 index 0000000000..bce52b2ec5 --- /dev/null +++ b/dts/Bindings/net/marvell-orion-net.txt @@ -0,0 +1,82 @@ +Marvell Orion/Discovery ethernet controller +============================================= + +The Marvell Discovery ethernet controller can be found on Marvell Orion SoCs +(Kirkwood, Dove, Orion5x, and Discovery Innovation) and as part of Marvell +Discovery system controller chips (mv64[345]60). + +The Discovery ethernet controller is described with two levels of nodes. The +first level describes the ethernet controller itself and the second level +describes up to 3 ethernet port nodes within that controller. The reason for +the multiple levels is that the port registers are interleaved within a single +set of controller registers. Each port node describes port-specific properties. + +Note: The above separation is only true for Discovery system controllers. +For Orion SoCs we stick to the separation, although there each controller has +only one port associated. Multiple ports are implemented as multiple single-port +controllers. As Kirkwood has some issues with proper initialization after reset, +an extra compatible string is added for it. + +* Ethernet controller node + +Required controller properties: + - #address-cells: shall be 1. + - #size-cells: shall be 0. + - compatible: shall be one of "marvell,orion-eth", "marvell,kirkwood-eth". + - reg: address and length of the controller registers. + +Optional controller properties: + - clocks: phandle reference to the controller clock. + - marvell,tx-checksum-limit: max tx packet size for hardware checksum. + +* Ethernet port node + +Required port properties: + - compatible: shall be one of "marvell,orion-eth-port", + "marvell,kirkwood-eth-port". + - reg: port number relative to ethernet controller, shall be 0, 1, or 2. + - interrupts: port interrupt. + - local-mac-address: See ethernet.txt file in the same directory. + +Optional port properties: + - marvell,tx-queue-size: size of the transmit ring buffer. + - marvell,tx-sram-addr: address of transmit descriptor buffer located in SRAM. + - marvell,tx-sram-size: size of transmit descriptor buffer located in SRAM. + - marvell,rx-queue-size: size of the receive ring buffer. + - marvell,rx-sram-addr: address of receive descriptor buffer located in SRAM. + - marvell,rx-sram-size: size of receive descriptor buffer located in SRAM. + +and + + - phy-handle: See ethernet.txt file in the same directory. + +or + + - speed: port speed if no PHY connected. + - duplex: port mode if no PHY connected. + +* Node example: + +mdio-bus { + ... + ethphy: ethernet-phy@8 { + ... + }; +}; + +eth: ethernet-controller@72000 { + compatible = "marvell,orion-eth"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x72000 0x2000>; + clocks = <&gate_clk 2>; + marvell,tx-checksum-limit = <1600>; + + ethernet@0 { + compatible = "marvell,orion-eth-port"; + reg = <0>; + interrupts = <29>; + phy-handle = <ðphy>; + local-mac-address = [00 00 00 00 00 00]; + }; +}; |