1 XILINX AXI ETHERNET Device Tree Bindings
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4 Also called AXI 1G/2.5G Ethernet Subsystem, the xilinx axi ethernet IP core
5 provides connectivity to an external ethernet PHY supporting different
6 interfaces: MII, GMII, RGMII, SGMII, 1000BaseX. It also includes two
7 segments of memory for buffering TX and RX, as well as the capability of
8 offloading TX/RX checksum calculation off the processor.
10 Management configuration is done through the AXI interface, while payload is
11 sent and received through means of an AXI DMA controller. This driver
12 includes the DMA driver code, so this driver is incompatible with AXI DMA
15 For more details about mdio please refer phy.txt file in the same directory.
18 - compatible : Must be one of "xlnx,axi-ethernet-1.00.a",
19 "xlnx,axi-ethernet-1.01.a", "xlnx,axi-ethernet-2.01.a"
20 - reg : Address and length of the IO space, as well as the address
21 and length of the AXI DMA controller IO space, unless
22 axistream-connected is specified, in which case the reg
23 attribute of the node referenced by it is used.
24 - interrupts : Should be a list of 2 or 3 interrupts: TX DMA, RX DMA,
25 and optionally Ethernet core. If axistream-connected is
26 specified, the TX/RX DMA interrupts should be on that node
27 instead, and only the Ethernet core interrupt is optionally
29 - phy-handle : Should point to the external phy device.
30 See ethernet.txt file in the same directory.
31 - xlnx,rxmem : Set to allocated memory buffer for Rx/Tx in the hardware
34 - phy-mode : See ethernet.txt
35 - xlnx,phy-type : Deprecated, do not use, but still accepted in preference
37 - xlnx,txcsum : 0 or empty for disabling TX checksum offload,
38 1 to enable partial TX checksum offload,
39 2 to enable full TX checksum offload
40 - xlnx,rxcsum : Same values as xlnx,txcsum but for RX checksum offload
41 - clocks : AXI bus clock for the device. Refer to common clock bindings.
42 Used to calculate MDIO clock divisor. If not specified, it is
43 auto-detected from the CPU clock (but only on platforms where
44 this is possible). New device trees should specify this - the
45 auto detection is only for backward compatibility.
46 - axistream-connected: Reference to another node which contains the resources
47 for the AXI DMA controller used by this device.
48 If this is specified, the DMA-related resources from that
49 device (DMA registers and DMA TX/RX interrupts) rather
50 than this one will be used.
51 - mdio : Child node for MDIO bus. Must be defined if PHY access is
52 required through the core's MDIO interface (i.e. always,
53 unless the PHY is accessed through a different bus).
56 axi_ethernet_eth: ethernet@40c00000 {
57 compatible = "xlnx,axi-ethernet-1.00.a";
58 device_type = "network";
59 interrupt-parent = <µblaze_0_axi_intc>;
63 reg = <0x40c00000 0x40000 0x50c00000 0x40000>;
68 axi_ethernetlite_0_mdio: mdio {
72 device_type = "ethernet-phy";