Hi,
I am wanting to talk to this external 1Mbit RAM chip through an SPI interface: https://www.microchip.com/en-us/product/23lc1024 with the nRF5340 device. Preferably, I would like for this external RAM to be memory mapped. I was wondering, is there an SPI controlled RAM driver already implemented in the sdk that is compatible with this chip? If not, what is the best way to write a driver for this SPI controlled RAM chip? I am not too familiar with how zephyr's devicetree system works, but would I need to create my own compatible zephyr devicetree device type? Or is there a better way?
Thank you in advance for the help.