On an i.MX7D processor, I would like to use the QuadSPI (qspi) peripheral from the cortex m4 core. The nxp-provided m4 drivers for bare metal and FreeRTOS include an 'ecspi' driver for the ecspi peripheral, but there is not a driver for the quadspi peripheral included.
Is an m4 QuadSPI driver available anywhere?
Note: this is not a question about booting from quadspi or Execute In Place (XIP) from quadspi flash. I am asking about using the quadspi as a peripheral at runtime, from the m4 (and the m4 is executing out of another memory like TCM or DDR).