ADRV9009 connected to MPSoC Xilinx FPGA

Hello Charly,

1. We have examples: https://wiki.analog.com/resources/eval/user-guides/adrv9009-zu11eg and https://wiki.analog.com/resources/eval/user-guides/adrv9009 for complete projects. The ADRV9009-ZU11EG SOM is an Zynq Ultrascale+ custom design which has schematic/HDL/software open so they can be used as a starting point. We have https://wiki.analog.com/resources/tools-software/linux-build/generic/petalinux as a guide on how to build petalinux.
2. You can start from our reference design device tree and customize it (https://github.com/analogdevicesinc/linux/blob/master/arch/arm64/boot/dts/xilinx/zynqmp-adrv9009-zu11eg-revb-adrv2crr-fmc-revb.dts). I don’t think we have a specific page or tool to automatically generate device trees. ADRV9009-ZU11EG uses HMC7044, maybe this design is closer to your project.

Regards,

Adrian

Hi, allow me to expand on the questions that Charly posted on our behalf...

1. We have gone through the user guide for the adrv9009 to build the HDL reference design and accompanying Petalinux project for the ZCU102. This process is fairly simple as it's outlined in the links you posted. What we are having trouble with now is, after modifying the HDL reference design to target our custom board, we are not sure how to create a matching Petalinux image.

The 'Building with Petalinux' guide shows how to bring in ADI's yocto layer (meta-adi) and choose the right device tree for the build. While our custom solution is a derivative of the ZCU102 HDL reference design, it isn't exactly the same. Thus, we encounter errors during build using our custom HDL paired with the 'zynqmp-zcu102-rev10-adrv9009' device tree, which is to be expected.

I am not sure how we can modify these device trees, or where to located them because I cannot find them in the meta-adi repo (with the exception of the pl-delete-nodes-*.dtsi files). Any guidance on how to move forward from here?

Thanks!

Hi,

The ADI Linux kernel is built by Petalinux (https://github.com/analogdevicesinc/meta-adi/blob/master/meta-adi-xilinx/recipes-kernel/linux/linux-adi.inc#L8), so the devicetree you are looking for should be: https://github.com/analogdevicesinc/linux/blob/master/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-rev10-adrv9009.dts

For extending the devicetree, I would look at https://github.com/analogdevicesinc/meta-adi/tree/master/meta-adi-xilinx#extending-the-devicetree.

Thanks,
Dragos

Hi Dragos,

Thank you for pointing me to the location of this device tree. Is my understanding correct that this device tree is pulled from the analogdevicesinc/linux repo during the build process?

I am not well versed in Linux as I would like to be, so I would like some clarification on extending the device tree. From the description on the readme you linked, it sounds like we can add new nodes to system-user.dtsi. Is it also possible to direct removal of a node, or re-define a node through system-user.dtsi as well? For example, we have modified the reference HDL design by removing the IP cores for the RX OS channel. How should we go about specifying this in system-user.dtsi?

Thanks,
Dave

Hi Dave,

That's correct: one of the petalinux-build's tasks is to do a git-fetch of the ADI repository:

     Currently 1 running tasks (3375 of 3456) 97%
     0: linux-xlnx-4.19-adi_master+gitAUTOINC+0a023430ca-r0 do_fetch (pid 72115) 67%

Did you try to add:

      /delete-node/ &axi_adrv9009_core_rx_obs;

to system-user.dtsi ?

Thanks,
Dragos

This is very helpful. I will try adding /delete-node/ to my system-user.dtsi. Is the syntax/usage of this directive similar to what's shown in this example?

And just to solidify my understanding, to build a working Petalinux image for a modified HDL design, we just need to add the meta-adi layer and extend the device tree by adding/deleting/changing nodes through system-user.dtsi? Is there anything else that I may be overlooking on the Petalinux side?

Thanks,
Dave

This is very helpful. I will try adding /delete-node/ to my system-user.dtsi. Is the syntax/usage of this directive similar to what's shown in this example?

And just to solidify my understanding, to build a working Petalinux image for a modified HDL design, we just need to add the meta-adi layer and extend the device tree by adding/deleting/changing nodes through system-user.dtsi? Is there anything else that I may be overlooking on the Petalinux side?

Thanks,
Dave