Dear all:
I am trying to change the partition table
from the default as defined in the board file inside Zephyr to
a slightly different configuration. Obviously I could do this
by editing the file in the zephyr tree but this has the
disadvantage that I have to redo the change each time I
upgrade the kernel. Hence I would like to make the change in
the overlay. Here is what I did in the overlay:
&flash0
{
/*
* For more information, see:
*
http://docs.zephyrproject.org/latest/guides/dts/index.html#flash-partitions
*/
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
boot_partition: partition@0 {
label = "mcuboot";
reg = <0x000000000 0x0000C000>;
};
/*
slot0_partition: partition@c000 {
label = "image-0";
reg = <0x0000C000 0x000067000>;
};
slot1_partition: partition@73000 {
label = "image-1";
reg = <0x00073000 0x000067000>;
};
scratch_partition: partition@da000 {
label = "image-scratch";
reg = <0x000da000 0x0001c000>;
};
*/
slot0_partition: partition@c000 {
label = "image-0";
reg = <0x0000C000 0x000075800>;
};
slot1_partition: partition@81800 {
label = "image-1";
reg = <0x00081800 0x000075800>;
};
/*
* The flash starting at 0x000f8000 and ending at (32kB)
* 0x000fffff is reserved for use by the application.
*/
/* Storage partition will be used by FCB/NFFS/NVS if
enabled. */
storage_partition: partition@f8000 {
label = "storage";
reg = <0x000f8000 0x00008000>;
};
};
};
As you can see I commented out the
definitions of slot0, slot1 and scratch, then I added in new
definitions for slot0 and slot1. When I attempt to compile
this I get a fatal error:
nrf52840_mdk.dts.pre.tmp:546.50-549.19:
ERROR (duplicate_label):
/soc/flash-controller@4001e000/flash@0/partitions/partition@81800:
Duplicate label 'slot1_partition' on
/soc/flash-controller@4001e000/flash@0/partitions/partition@81800
and
/soc/flash-controller@4001e000/flash@0/partitions/partition@73000
ERROR:
Input tree has errors, aborting (use -f to force output)
The device tree compile didn’t mind
changing the size of the slot0 partition, but it hated
changing the base address of the slot1 partition.
I tried leaving the partition address at
73000, it compiles, but the device tree compiler complains
“warning: unit-address and first reg (0x81800) don't match for
partition@73000” and mcuboot complains “<wrn> mcuboot:
Cannot upgrade: slots don't have same amount of sectors”.
I also tried many variations on adding
/delete-node/ and /delete-property/ in front of the
definitions but this just gave me other errors.
Obviously I am going about this
incorrectly. What is the right way to change the partition
table in a device tree overlay?
Lawrence King
Principal Developer
Connected Transport Market Unit
https://www.Irdeto.com
+1(416)627-7302
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