I have an issue with using partitions created by PM in external flash. I can create a partition in my prj.conf file and use that and everything works. But I need to put some data into the external NOR memory. PM creates the partitions correctly as far as I can see. But I have not found a way to make the FatFS driver correctly find those partitions. Basically I have the exact same issue as in this ticket: How to reference PM generated partitions from device tree?
I need to create a disk like this for FatFS driver to find.
/ {
msc_disk0 {
compatible = "zephyr,flash-disk";
partition = <&external_flash>;
disk-name = "NAND";
cache-size = <4096>;
};
};
If I have the partition in internal memory I can at least make this compile (the partition is tiny so it won't work for my application)
&flash0 {
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
boot_partition: partition@0 {
label = "mcuboot";
reg = <0x0 0xc000>;
};
slot0_partition: partition@c000 {
label = "image-0";
reg = <0xc000 0x72000>;
};
slot1_partition: partition@7e000 {
label = "image-1";
reg = <0x7e000 0x72000>;
};
scratch_partition: partition@f0000 {
label = "image-scratch";
reg = <0xf0000 0xa000>;
};
storage_partition: partition@fa000 {
label = "storage";
reg = <0xfa000 0x5f00>;
};
external_flash: partition@fff00 {
label = "external_flash";
reg = <0xfff00 0x100>;
};
};
};
The external memory itself is fine and I can read/write it with flash_area_read() and flash_area_write() functions.
Is there a way to reference the PM created partitions from within the devicetree file of my main application?
