interfacing MT29F4G01ABAFDWB nand flash.

i have to interface MT29F4G01ABAFDWB in zephyr rtos but i need help how create overlay file for it(i want to interface it using spi), i already have bare metal drivers for mt29f4g01abafdwb now those i have to move it to zephyr.
i'm using zephyr 2.6
and my controller is nrf52840dk board