reproduce:
        git remote add linusw-pinctrl https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git
        git fetch linusw-pinctrl devel
        git checkout linusw-pinctrl/devel
        b4 shazam https://lore.kernel.org/r/20241113101124.1279648-8-andrei.stefanescu@oss.nxp.com
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        # install Sphinx 2.4.4
        make htmldocs