TX2 uart1 issue

i use Tx2 software version:R28.1. i want to connect sensor to TX2 uart1 , but in Tegra_Linux_Driver_Package_Software_Features_28.1.pdf say that UART1 (Camera/GPIO Expansion Header): Not Used ,is it right?
what should i edit if i wnat to use uart1? And the uart1 is mapping to /dev/ttyTHS1?

J17 on the dev board is “/dev/ttyTHS2”, and is also routed to the camera module header. Not sure if it is “UART1”.

OK,i will try it. thanks for your help.