When I build the images for my custom board based on the imx6ul, I still get a imx6ul-14x14-evk.dtb file generated. I'd like to change the target to create a imx6ul-customboard.dtb and be able to modify the source files to match my board layout. I think I should create a copy of all the imx6ul-14x14-*.dts files and rename them imx6ul-customboard-*.dts and then modify those to meet my needs. However, I'm unsure where in the build configs I should be specifying which device tree source to build into the image. Do I just set the BR2_LINUX_KERNEL_INTREE_DTS_NAME?
Is there any device tree customization guide available, or can anyone point me in the right direction?