Issue mounting SPI-NOR Flash in Linux on custom board based on iMX93

Bob_NXP_user — Tue, 03 Jun 2025 07:34:52 GMT

Hello everybody,

I'm tryng to mount a partition of my 256 MB SPI-NOR Flash memory MT25QU02GCBB8E12-0AUT in Linux, in order to see it as a folder of the file system (/mnt) and store data easily.

I already use the first 128 MB of the memory to store the entire OS, and I succesfully boot from there, so I would like to set the remaining part for data storage. I partitioned into the dts file like this:

&flexspi1 {

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_flexspi>;

assigned-clock-rates = <80000000>;

status = "okay";

flash0: flash@0 {

reg = <0>;

#address-cells = <1>;

#size-cells = <1>;

compatible = "jedec,spi-nor";

spi-max-frequency = <10000000>;

spi-tx-bus-width = <4>;

spi-rx-bus-width = <4>;

/* 128 MB partition dedicated to bootloader, device tree, kernel and rootfs */

partition@0 {

label = "system-readonly";

reg = <0x0000000 0x8000000>;

read-only;

};

/* 128 MB partition dedicated to user data (for example: application, logs) */

partition@8000000{

label = "data";

reg = <0x8000000 0x8000000>;

};

enabling the mtd-utils I can see the partitions into /proc/mtd

then if I do the following steps I'm able to save files into the /mnt folder:

flash_erase -j /dev/mtd1 0 0
modprobe mtdblock
mount -t jffs2 /dev/mtdblock1 /mnt
echo 'test' > /mnt/file.txt

but when I reset the board and I try do the mounting step without erasing all the memory it gives me the following error:

Can you tell me what's going on? Is there a way to use this memory as data storage? Thanks.

Best Regards,

Bob

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Issue mounting SPI-NOR Flash in Linux on custom board based on iMX93