I would like to write postmarketOS documentation on how to port U-Boot to new boards, focusing on mobile devices and their quirks. But, because I do not have personal experience with porting U-Boot, I need help.
Thus, does anybody have experience with porting U-Boot to a new board and would be willing to answer some questions about the process? Bonus points if U-Boot was ported without the board having good mainline Linux support.