Device Tree U-Boot customization

Hello.
How can I customize device tree for u-boot?
I changed u-boot-toradex/arch/arm/dts/imx6ull-colibri.dts.
I built: make -j3 2>&1 | tee build.log and dd bs=1024 count=1 if=/dev/zero | cat - u-boot.imx > u-boot-nand.imx
I copied files to folder with Distributive for downloading by Tezi: u-boot-nand.imx, u-boot-dtb.imx.
I updated DIstribution by Tezi.

But as I understood my custom device tree was not applied

But as I understood my custom device tree was not applied

Thank you

Can you help me customize device tree for u-boot?

U_boot doesn’t use a Device Tree. Devise tree is used by Linux. On Colibri iMX6ULL device tree is kept on separate UBI partition as a binary.
You can ether update only a device tree using commands ubiupdatevol at Linux or ubi write at U_Boot or by adding or replacing dtb file in TEZI compatible image and re-flashing whole device.

For last case you need to unpack TEZI compatible package to USB stick or SD card. Add your dtb file there and modify json file to include your dtb. Than start TEZI and insert your media.