Using Zephyr flash driver with custom SPI driver

[Bartosz22]

Hi,

I am using an external flash on the NRF52840DK via SPI and have established working communication with the flash memory. However, I need to disable CONFIG_SPI and CONFIG_GPIO in the current project because we use input capture, which requires disabling CONFIG_GPIO. Additionally, we need to use a custom SPI driver. How can I integrate my custom SPI driver with the Zephyr flash driver?

[Amanda Hsieh]

Hi, 

May I know your intention for using external flash? To use external flash for mcuboot or develop it as this driver?

You can refer to this tutorial to write a custom device driver in Zephyr or check this post which explains how to add an out of tree custom driver to zephyr/drivers/flash (no patching of Zephyr).  

Regards,
Amanda H.