I am able to kwboot mainline U-Boot on a DS214. I started with the ds414_defconfig and modified the main memory size in the device tree source and the 'CS0 Size' register in ds414.c. I'm a bit stuck on getting all of the hardware to work, especially the SATA ports. I enabled CONFIG_SATA_MV and CONFIG_CMD_SATA, and I checked that the driver uses the correct register offsets for tby Majiir - uBoot