Hello,
I would like to build an image for a custom board that is based on Beaglebone Black but has some small differences, e.g. different power management chip, an external RTC, etc. How do I change the device tree files for U-Boot and kernel in Yocto workflow? Where do I start?
use BBB u-boot as a reference, look for the PMIC configuration for BBB. then adjust for the PMIC you are using. with out providing part numbers of the parts your using, it’s hard to give further info. the RTC will be the easiest part. just use other dts files as a reference
also, what build environment ?? yocto, buildroot, etc.