I’m happy to announce that a couple days ago, support for the CALAO SBC35-A9G20, TNY-A9260 and TNY-A9G20 boards made its way into the U-Boot git repository. Sadly, it’s not possible to boot from an MMC/SD card with the SBC35 yet, but it’s something I’m currently working on.
Support for all these cards will be available in the next U-Boot release, due in November.