hello venkatraman.bhat,
you’ll need to download the latest release sources package.
please check https://developer.nvidia.com/embedded/linux-tegra, it’s l4t-r32.5.1 to add developer preview support for Jetson TX2 NX module.
for example,
here’s path for TX2 NX’s device tree sources. please include your changes and build the device tree blob.
$L4T_Sources/r32.5.1/Linux_for_Tegra/source/public/hardware/nvidia/platform/t18x/lanai/kernel-dts/