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No ethernet device found on Zedboard Linux

linux.matthew

I'm building my own linux image form my Avnet Zedboard using the meta-xilinx "zedboard-zynq7" layer for my Yocto environment.  Everything builds smoothly, and I create my SD card according to the BOOT.sdcard instructions.  It boots linux cleanly, but I have no ethernet device:

Populating dev cache
Configuring network interfaces... ifconfig: SIOCGIFFLAGS: No such device

The ethernet works fine under u-boot with the ping test if I manually set the IP.  So I'm guessing the linux build is flaky.  One thing I've noticed is that the BOOT.sdcard says to use the DTB file:

DTB:    devicetree.dtb (uImage-<machine name>.dtb)

but I've noticed that the one created by bitbake

zedboard-zynq7-mmcblk0p2.dtb
zedboard-zynq7-ram.dtb

are considerably smaller than the devicetree.dtb in the 14.5 release. 

Can anyone help me out?  This seems like it should be a simple fix. Thanks

Matt

  • 0

    Hi linux.matthew,

    Sounds like you could have your Ethernet device either missing or incorrectly configured within the device tree.

    In our SpeedWay training, there is an entry for the Gigabit Ethernet Device which looks like this:

    eth@e000b000 {
    compatible = "xlnx,ps7-ethernet-1.00.a";
    reg = <0xe000b000 0x1000>;
    interrupts = <0 22 0>;
    interrupt-parent = <&gic>;
    phy-handle = <&phy0>;
    xlnx,ptp-enet-clock = <111111111>;
    xlnx,slcr-div0-1000Mbps = <8>;
    xlnx,slcr-div0-100Mbps = <8>;
    xlnx,slcr-div0-10Mbps = <8>;
    xlnx,slcr-div1-1000Mbps = <1>;
    xlnx,slcr-div1-100Mbps = <5>;
    xlnx,slcr-div1-10Mbps = <50>;
    #address-cells = <0x1>;
    #size-cells = <0x0>;

    phy0: phy@0 {
      compatible = "marvell,88e1510";
      device_type = "ethernet-phy";
      reg = <0x0>;
      marvell,reg-init=<3 16 0xff00 0x1e 3 17 0xfff0 0x0a>;
    };
    };

    Please take a look in your device tree from bitbake and see if there is a similar entry in there.

    Regards,

    -Kevin