SPI configuration for TX2

Hello

I had followed these instructions and successfully run SPI on my TX2 board (Kernel L4T 28.2.1). Quite grateful to all your assist and help.

Problem:
Now, need to install Tensorflow and cuDNN, which requires me to re-flash the board. But I’m not sure to try Jetpack 3.3, because SPI is extremely critical for my applications.

Question:
Should I stick to these instructions, and Kernel L4T 28.2.1; or Jetpack 3.3 will enable me to use SPI too?

Thank you for all the help