I searched around the forum some more and found this thread:
https://devtalk.nvidia.com/default/topic/1023121/jetson-tx1/tx1-jetpack-3-1-dev-ttyths1-reliable-hard-lockup-/
So essentially adding this to my DTS file allowed access to /dev/ttyTHS1, which was connected to UART2:
serial@70006040 {
resets = <0x41 0x7>;
};