QSPI automatically read sfdp-bdp

[BDA]

I have a project that is reading an external flash chip via qspi.  Everything is working well, and I haven't defined the sfdp-bdp field in the overlay file that defines the pins for the qspi device.  The zephyr documentation says there's a CONFIG_SPI_NOR_SFDP_RUNTIME that will tell the code to automatically read the values at runtime.  Does that work for QSPI?  Is defining that symbol in prj.conf and deleting the sfdp-bdp section of the overlay sufficient to have the code read/use the flash chip's SFDP data at runtime?

[Håkon Alseth]

Hi,

 

Here's the function that reads the parameters:

https://github.com/nrfconnect/sdk-zephyr/blob/v2.7.0-ncs1/drivers/flash/nrf_qspi_nor.c#L752

 

And this requires CONFIG_FLASH_JESD216 and CONFIG_FLASH_JESD216_API to read it out from the flash itself.

If the latter one is not set, it shall be provided by your device tree declaration.

 

Kind regards,

Håkon