driver and application files porting from SDK to linux kernel

Hi Group, currently working on nRF52840 chipset based EVK and able to flash program. But I need to port the chipset driver and required files from nRF5_SDK_15.2.0 SDK to my current linux kernel build which are having all the other device driver integrated. Please let me know which are all files I need to port for basic communication from external CPU to nRF52480 chipset .

Thanks in advance.