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[Portia Stephens <2021962@xxxxxxxxxxxxxxxxxx>]

The device trees comes directly from the Xilinx kernel
(https://github.com/Xilinx/linux-xlnx) . It seems like in the focal
kernel the overlay for the KV260 SOM did not set a compatible string so
the it fell back to the compatible string defined by the baseboard
(zynqmp-smk-k26-revA.dts) . When a device tree for rev B of the board
was added the compatible string was added to the rev A device tree as
well.

The change was added here:
https://github.com/Xilinx/linux-xlnx/commit/70604467dc949d3b77eabaa1288365cb25b2ec23#diff-f19b970e083cc67c8063c7698b0bb6554d69d43190d355adc20945526eda5831

I agree with Masahiro that Jammy is correct. Since the device trees are
not in the kernel build and are provided by Xilinx I don't think this is
something we can backport to Focal.

** Changed in: linux-xilinx-zynqmp (Ubuntu)
       Status: New => Won't Fix

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https://bugs.launchpad.net/bugs/2021962

Title:
  F/xilinx and J/xilinx uses different keyword in /proc/device-
  tree/compatible

Status in ubuntu-kernel-tests:
  New
Status in linux-xilinx-zynqmp package in Ubuntu:
  Won't Fix

Bug description:
  While testing J/xilinx, I noticed that the keyword we use to grep from
  /proc/device-tree/compatible has to be changed into kv26 instead of
  k26 that we used for F/xilinx

  J/xilinx:
  $ cat /proc/device-tree/compatible
  xlnx,zynqmp-sk-kv260-rev1xlnx,zynqmp-sk-kv260-revBxlnx,zynqmp-sk-kv260xlnx,zynqmp

  F/xilinx:
  $ cat /proc/device-tree/compatible
  xlnx,zynqmp-smk-k26-rev1xlnx,zynqmp-smk-k26-revBxlnx,zynqmp-smk-k26-revAxlnx,zynqmp-smk-k26xlnx,zynqmp

  From what I can found on the Internet, KV260 is "a vision application
  development platform for Kria K26 SOMs (system-on-module)". But it's
  better to let the kernel maintainer (Portia) to answer that if this
  difference is expected.

  
  Related change for tests:
  https://code.launchpad.net/~canonical-kernel-team/+git/autotest-client-tests/+merge/443543

  ---
  External link: https://warthogs.atlassian.net/browse/PEL-439

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