I dowlanded T4240RBD honister version the link given by NXP. Then, I compiled it for T4240RDB and I flashed NOR using u-boot-nor.bin and rcw_27_55_1_9_1666MHz.bin files. We changed switches for NOR on the board. But it did not work. Is u-boot-2021.04 version working ?
https://github.com/nxp-qoriq/yocto-sdk
Yocto SDK https://github.com/nxp-qoriq/yocto-sdk/tree/honister only provides support for Layerscape processors, didn't support for T4240RDB.
You could use QorIQ SDK 2.0 1703 release.
Please refer to the following link.