U-Boot has a sort of baby device model implementation. :) Simpler and perhaps easier to grok than Linux, but using the identical DT based HW representation Linu

U-Boot has a sort of baby device model implementation. :) Simpler and perhaps easier to grok than Linux, but using the identical DT based HW representation Linux uses later on during boot (it may even modify DTB a bit in memory to pass some information to kernel). OTOH, depending on platform it may mix this device model with some ad-hoc/hardcoded knowledge about the platform and ifdef mess[1], that is otherwise properly described by DT in Linux. So it can be a mixed bag. [1] eg. https://xff.cz/git/u-boot/tree/board/sunxi/board.c https://xff.cz/git/u-boot/tree/board/sunxi/board.c