The spi controller driver can not work on customer's board, any access to spi device will be "FF". If they use the controller driver in wrlinux 7(spi-fsl-dspi.c) to instead of the controller driver in wrlinux 8, it will be okay to access spi device.
there is no spi device on evm board, it's hard to reproduce in VLM. Only can be verified on customer side.