BMD-341 Host Interface & Linux Support

I am considering using U-Blox p/n BMD-341 on a new design.

The primary use case model is to have BMD-341 connected to a Linux-based SoM via one of the standard interfaces (UART, SPI, or USB). In this use case model, BMD-341 is configured to operate as a 802.15.4 Thread radio.

What is the Linux support available to implement a 802.15.4 Thread radio?
What is the default host interface defined in the Linux Driver?