iMX8QM-MEK board cannot see mt35xu512

[lorenzo_sarchi]

I have flashed an sdcard with Yocto, Sumo, 4.14.98.

imx8qm-mek.dts is correctly filled with

&flexspi0 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_flexspi0>;
status = "okay";

flash0: mt35xu512aba@0 {

......

even with added partitions 

              partition@0 {
....

I boot from sdcard but the kernel doesn't probe it (no messages about mt35) and of course mtd partitions are not present at all.

I would expect to see all the partitions, so to be able to write as needed; nevertheless this is not the case.

What could be the reason?

Thanks in advance & best regards,

Lorenzo

[AldoG · Accepted solution]

Hello,

This may be caused because by SCFW configuration, it reserves the FlexSPI for use by Cortex-M4.

You'll need to rebuild your SCFW using the porting kit and remove the FlexSPI from the M4 resources, then rebuild the Linux image with the modified SCFW.

Best regards,
Aldo.

[lorenzo_sarchi]

Thanks Aldo,

Properly modifying the board.c and remaking the scfw_tcm.bin, it does work indeed !

Have a nice day,

Lorenzo