Note that flashing signs the content prior to the flash. A signed partition on one Jetson will probably fail on another even if the non-signature part is correct. If you are interested in the topic, here are some URLs:
- https://devtalk.nvidia.com/default/topic/1042852/jetson-tx2/request-for-a-tool-to-update-device-tree-locally-/post/5389408/#5389408
- https://forums.developer.nvidia.com/t/kernel-dtb-loading-error-on-r32-3-1/120778/11
- https://forums.developer.nvidia.com/t/how-to-load-dtb-instead-of-flashing-to-emmc/122019/21
- https://forums.developer.nvidia.com/t/generating-signature-for-initrd-and-verifying-using-cboot/124967/3