[U-Boot] FIT image and modify device-tree

Hi! We are using U-Boot and FIT images, but also want to modify the FDT during boot, today we just do: bootm 0xe8000000#config@1 which contains, linux, romfs and fdt. But I want to include additional nodes in the FDT to pass to linux (or pass an extra device tree if possible, just want to pass more information to linux). Is this possible when using FIT image. If not, what is the recommended way to send information from U-Boot to Linux?

Regards Mattias