I try to use devtool to make some patch for u-boot-fslc.
When I make the menuconfig for u-boot-fslc where is placed the .config file?
Check if you have 'workspace/sources/u-boot-fslc/oe-workdir/u-boot-fslc-v2022.04+git999/<board-name>_defconfig/.config'. I think this is the .config used when enabled devtool for u-boot-fslc.
