[meta-xilinx] Problems with Ethernet on ZC706

[Stephen Mossom]

Hi there,

I am trying to use the meta-xilinx layer to get the ZC706 dev board booting with kernel version 3.10.


Initially I proved that the default 3.8 version worked by checking out the dora branch of poky along with the dora branch of meta-xilinx.


Using this branch I was able to boot the board successfully from both a partitioned SD card and using an NFS sysroot.?


There are features which our project requires that are only available in kernel versions 3.10 onwards.


I initially edited the zc706-zynq7.conf? file to set PREFERRED_VERSION_linux-xlnx to 3.10.


The kernel was successfully fetched and built but when I try to boot it I get an error from the ethernet driver:-


libphy: XEMACPS mii bus: probed
mdio_bus e000b000: cannot get PHY at address 7
xemacps e000b000.ps7-ethernet: pdev->id -1, baseaddr 0xe000b000, irq 54

I have since tried the master branch of poky and meta-xilinx and I get the same error. I have also tried building version 3.12 and 3.14 of the kernel with the same results.

Address 7 is the correct address for the Ethernet PHY on the zc706.

I had a read through some of the posts on this mailing lists and found some discussion on the device trees for the Zynq being in flux so I have also tried using the device tree from the kernel tree instead of the meta-xilinx layer version. The error still persists.

I have noticed that the e1000e ethernet driver version has changed - 2.1.4-k in 3.8 and  2.3.2-k in later versions of the kernel. I'm not sure how relevant this is.

Has anyone managed to get a version of the kernel working with ethernet using YOCTO beyond version 3.8? Is there a recommended 'known good' configuration of kernel and device tree for this board which uses a kernel which is at version 3.10 or newer?

Thanks in advance for any assistance.

Stephen





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