reproduce:
        git remote add lee-mfd https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git
        git fetch lee-mfd for-mfd-fixes
        git checkout lee-mfd/for-mfd-fixes
        b4 shazam https://lore.kernel.org/r/20251218-max77759-charger-v2-4-2b259980a686@google.com
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        # pip install -r Documentation/sphinx/requirements.txt
        make htmldocs