How to update cfg file separately on custom board

Hi,
How to update BCT/cfg file separately on custom board?

There is no way to update it “separately” but you can update them all at once by using the bl_payload_updater.

https://docs.nvidia.com/jetson/l4t/index.html#page/Tegra%20Linux%20Driver%20Package%20Development%20Guide/bootloader_update.html#