Re: [Buildroot] [PATCH v6 1/2] configs/zynqmp_zcu106: bump ATF/U-Boot/Linux to Xilinx 2022

[Peter Korsgaard <peter@korsgaard.com>]

>>>>> "Neal" == Neal Frager <nealf@xilinx.com> writes:

 > Hi Peter,
 >> Hmm, did you test this on a zcu106 board?

 >> I just got access to a zcu106 rev 1.0 board and gave it a try here, and see nothing on either of the serial ports.

 >> Looking at the u-boot configuration I see that xilinx_zynqmp_virt_defconfig sets:

 >> CONFIG_DEFAULT_DEVICE_TREE="zynqmp-zcu100-revC"

 >> Which seems to have a different uart and pinmuxing setup. Changing
 >> that to zynqmp-zcu106-revA it does boot (but complains here and
 >> there).

 >> This is the first time I use a zcu106, so maybe I am missing
 >> something, but I don't understand how it can work for you with the
 >> zcu100 DTB?

 > Thank you for catching this.  I will take care of getting this corrected with a follow up patch.

 > The way zynqmp_virt_defconfig works is described on our wiki page below:
 > https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18841973/Build+U-Boot

 > The reason why this was working for me is because I had the DEVICE_TREE environment variable set when building.

 > make distclean
 > make xilinx_zynqmp_virt_defconfig
 > export DEVICE_TREE="zynqmp-zcu106-revA"
 > make

 > What is the proper way for setting an environment variable with
 > buildroot?  Should I add this as a pre-build script in each defconfig?

Instead of working with an environment variable, I think it would be
nicer to tweak the zynqmp_virt_defconfig file with a configuration
fragment with the

CONFIG_DEFAULT_DEVICE_TREE="zynqmp-zcu106-revA"

Line.

This can be done with the BR2_TARGET_UBOOT_CONFIG_FRAGMENT_FILES option.

-- 
Bye, Peter Korsgaard
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