I have submitted an initial FreeBSD/arm64 review for MediaTek MT7622 / Banana Pi R64 support: https://reviews.freebsd.org/D57732 This change adds the initial MediaTek platform configuration, a MediaTek-specific kernel config, integration with the arm64 GENERIC build, common MediaTek clock helper code, and MT7622 clock-controller support for topckgen, infracfg, audsys, ethsys, sgmiisys, ssusbsys, pciesys, and pericfg. It also includes initial pinctrl support, UART support, and the required DTB/build glue. UART console bring-up has been tested, while the rest of the platform support will continue in follow-up changes. Feedback and review are welcome.