samples/dfu/firmware_loader: common partitioning of nrf54lm20dongle by nvlsianpu · Pull Request #28154 · nrfconnect/sdk-nrf

nvlsianpu · 2026-04-14T17:43:24Z

Added DTS overlay for partitions on nRF54LM20dongle.
This is for firmware loader - slot0_parttion spans till end of RRAM.
MCUboot Is (and must use same partitioning).
An application build must keep the same start address but
can downsize the partition.

NordicBuilder · 2026-04-14T17:46:11Z

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^{To view the history of this post, click the 'edited' button above}
Build number: 5

Inputs:

Sources:

sdk-nrf: PR head: d46f27a764efe0e3327a220dba0d23b4d3928bba

more details

sdk-nrf:

PR head: d46f27a764efe0e3327a220dba0d23b4d3928bba
merge base: 2f84e6146f57ef6227f9edc068ecab6867c23273
target head (main): c8ec6dd3723bb32ed04747fb4dff697577742179
Diff

Github labels

Enabled	Name	Description
	ci-disabled	Disable the ci execution
	ci-all-test	Run all of ci, no test spec filtering will be done
	ci-force-downstream	Force execution of downstream even if twister fails
	ci-run-twister	Force run twister
	ci-run-zephyr-twister	Force run zephyr twister

List of changed files detected by CI (2)

samples
│  ├── dfu
│  │  ├── fw_loader
│  │  │  ├── ble_mcumgr
│  │  │  │  ├── boards
│  │  │  │  │  │ nrf54lm20dongle_nrf54lm20b_cpuapp.overlay
│  │  │  ├── usb_mcumgr
│  │  │  │  ├── boards
│  │  │  │  │  │ nrf54lm20dongle_nrf54lm20b_cpuapp.overlay

Outputs:

Toolchain

Version: 53ac68dd62
Build docker image: docker-dtr.nordicsemi.no/sw-production/ncs-build:53ac68dd62_5ea73affbf

Test Spec & Results: ✅ Success; ❌ Failure; 🟠 Queued; 🟡 Progress; ◻️ Skipped; ⚠️ Quarantine

◻️ Toolchain - Skipped: existing toolchain is used
✅ Build twister
- sdk-nrf test count: 4
✅ Integration tests
- ✅ test-sdk-mcuboot
- ✅ test-sdk-dfu

Disabled integration tests

- test-fw-nrfconnect-nrf_lrcs_mosh
- test-fw-nrfconnect-nrf_lrcs_positioning
- desktop52_verification
- test_ble_nrf_config
- test-fw-nrfconnect-apps
- test-fw-nrfconnect-ble_mesh
- test-fw-nrfconnect-ble_samples
- test-fw-nrfconnect-chip
- test-fw-nrfconnect-fem
- test-fw-nrfconnect-nfc
- test-fw-nrfconnect-nrf-iot_libmodem-nrf
- test-fw-nrfconnect-nrf-iot_lwm2m
- test-fw-nrfconnect-nrf-iot_samples
- test-fw-nrfconnect-nrf-iot_thingy91
- test-fw-nrfconnect-nrf-iot_zephyr_lwm2m
- test-fw-nrfconnect-nrf_crypto
- test-fw-nrfconnect-ps-main
- test-fw-nrfconnect-rpc
- test-fw-nrfconnect-rs
- test-fw-nrfconnect-tfm
- test-fw-nrfconnect-thread-main
- test-low-level
- test-sdk-find-my
- test-sdk-wifi

Note: This message is automatically posted and updated by the CI

nordicjm · 2026-04-15T06:07:33Z

+/delete-node/ &boot_partition;
+/delete-node/ &slot0_partition;


Suggested change

/delete-node/ &boot_partition;

/delete-node/ &slot0_partition;

nordicjm · 2026-04-15T06:07:41Z

+	reg = <0x0 DT_SIZE_K(2036)>;
+	ranges = <0x0 0x0 DT_SIZE_K(2036)>;
+


Suggested change

reg = <0x0 DT_SIZE_K(2036)>;

ranges = <0x0 0x0 DT_SIZE_K(2036)>;

nordicjm · 2026-04-15T06:07:57Z

+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		/* Matches board layout */
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x0 DT_SIZE_K(24)>;
+		};
+
+		/* Matches board layout */
+		slot1_partition: partition@6000 {
+			label = "image-1";
+			reg = <0x6000 DT_SIZE_K(116)>;
+		};
+
+		/* Start matches board layout */


Suggested change

compatible = "fixed-partitions";

#address-cells = <1>;

#size-cells = <1>;

/* Matches board layout */

boot_partition: partition@0 {

label = "mcuboot";

reg = <0x0 DT_SIZE_K(24)>;

};

/* Matches board layout */

slot1_partition: partition@6000 {

label = "image-1";

reg = <0x6000 DT_SIZE_K(116)>;

};

/* Start matches board layout */

I guess it can be simplified even more as I did in https://github.com/nrfconnect/sdk-nrf/pull/27984/changes#diff-3cbd7af71ec3cb38da7c96430337355519d1064223bc20b549f4d359f24acfe8.

nordicjm · 2026-04-15T06:09:07Z

+/delete-node/ &boot_partition;
+/delete-node/ &slot0_partition;
+/delete-node/ &slot1_partition;
+/delete-node/ &storage_partition;


this file needs to be in the boards folder of both samples, samples must be self contained and allow copying out for vscode usability

Ok, duplicated and moved accordingly.

Damian-Nordic

Found a few minor spelling and grammar issues but LGTM overall.

Damian-Nordic · 2026-04-23T12:06:48Z

+/* This is nRF54lm20dongle_nrf54lm20b_cpuapp peculiar partitioning for MCUboot and firmware loader
+ * slot0_partition spans RRAM with can be update by the firmware loader and booted by MCUboot.
+ * beginning of the slot0_partition must match with the beginning of the slot0_partition of the user
+ * application. Althought Application can be build for smaler partition and live some space for
+ * other purposes like a storage partition.


Suggested change

/* This is nRF54lm20dongle_nrf54lm20b_cpuapp peculiar partitioning for MCUboot and firmware loader

* slot0_partition spans RRAM with can be update by the firmware loader and booted by MCUboot.

* beginning of the slot0_partition must match with the beginning of the slot0_partition of the user

* application. Althought Application can be build for smaler partition and live some space for

* other purposes like a storage partition.

/* This is nRF54lm20dongle_nrf54lm20b_cpuapp-specific partitioning for MCUboot and firmware loader.

* slot0_partition defines RRAM region which can be updated by the firmware loader and booted by MCUboot.

* Beginning of the slot0_partition must match the beginning of the slot0_partition of the user

* application, but the application can use a smaller partition and leave some space for

* other purposes like a storage partition.

Added DTS overlay for partitions on nRF54LM20dongle. This is for firmware loader - slot0_parttion spans till end of RRAM. MCUboot Is (and must use same partitioning). An application build must keep the same start address but can downsize the partition. Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

nordicjm reviewed Apr 15, 2026

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nvlsianpu force-pushed the nrf54lm20dongle_comon_part branch from 87b9564 to 4a4fdfa Compare April 22, 2026 13:58

nvlsianpu added the no-changelog label Apr 22, 2026

nvlsianpu marked this pull request as ready for review April 22, 2026 14:01

nvlsianpu requested a review from a team as a code owner April 22, 2026 14:01

nvlsianpu mentioned this pull request Apr 22, 2026

[nrf noup] boot/zephyr/boards: DTS partitioning for nrf54lm20dongle nrfconnect/sdk-mcuboot#648

Merged

nvlsianpu added this to the 3.3.1 milestone Apr 22, 2026

nvlsianpu added the backport v3.3-branch label Apr 22, 2026

nvlsianpu requested review from Damian-Nordic and nordicjm April 23, 2026 05:27

Damian-Nordic approved these changes Apr 23, 2026

View reviewed changes

nvlsianpu force-pushed the nrf54lm20dongle_comon_part branch from 4a4fdfa to b6204f7 Compare April 24, 2026 09:30

michalek-no approved these changes Apr 24, 2026

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de-nordic requested changes Apr 24, 2026

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Comment thread samples/dfu/fw_loader/ble_mcumgr/boards/nrf54lm20dongle_nrf54lm20b_cpuapp.overlay

nvlsianpu force-pushed the nrf54lm20dongle_comon_part branch from b6204f7 to d9bf481 Compare April 24, 2026 09:34

de-nordic approved these changes Apr 24, 2026

View reviewed changes

nvlsianpu force-pushed the nrf54lm20dongle_comon_part branch from d9bf481 to d46f27a Compare April 24, 2026 09:39

adsz-nordic approved these changes Apr 24, 2026

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nvlsianpu merged commit ca38e00 into nrfconnect:main Apr 24, 2026
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NordicBuilder mentioned this pull request Apr 24, 2026

[Backport v3.3-branch] samples/dfu/firmware_loader: common partitioning of nrf54lm20dongle #28382

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		/delete-node/ &boot_partition;
		/delete-node/ &slot0_partition;

		reg = <0x0 DT_SIZE_K(2036)>;
		ranges = <0x0 0x0 DT_SIZE_K(2036)>;

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Test Spec & Results: ✅ Success; ❌ Failure; 🟠 Queued; 🟡 Progress; ◻️ Skipped; ⚠️ Quarantine

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nvlsianpu commented Apr 14, 2026 •

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