Custom ieee802.25.4 transceiver with nRF52840

Good afternoon,

I have successfully established a 2.4GHz Zigbee network using nrf52540 + Zephyr + ZBOSS. Now I need to switch to sub-1GHz band - suits better my application. For that I need a separate transceiver, such as AT86RF212. Is there a guide on how to implement a custom 802.15.4 transceiver to ZBOSS stack? Searching through ZBOSS file structure I found some custom drivers, so I guess it's possible, but I need more information such as how to include a custom driver to my project and whether any changes need to be made to DTS. 

Kind regards,

pelgrimo

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