Best Practices for Board Ports
In addition to the regular best practices such as using Checkpatch and following the Documentation Style and the U-Boot Coding Style there are some things which are specific to creating a new board port.
Implement Standard Boot to ensure that most operating systems will be supported by the platform.
The platform defconfig file must be generated via make savedefconfig.
The Kconfig and Kbuild infrastructure supports using “fragments” that can be used to apply changes on top of a defconfig file. These can be useful for many things such as:
Supporting different firmware locations (e.g. eMMC, SD, QSPI).
Multiple board variants when runtime detection is not desired.
Supporting different build types such as production and development.
Kconfig fragments should reside in the board directory itself rather than in the top-level configs/ directory.