If we do not use UUU to upgrade the Uboot, kernel, and file system that we obtained from the supplier, is there any other way to OTA upgrade the program, which can be upgraded to the latest version or rolled back to the original version? If the upgrade fails, an error message will be reported.
Please refer this document.
https://www.nxp.com/webapp/sps/download/preDownload.jsp?render=true