NCSDK-35479: Preserve boot request values during reboot #25627

tomchy · 2025-11-17T15:46:09Z

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Copilot

Pull Request Overview

This PR implements functionality to preserve bootloader request values across device reboots by introducing a backup mechanism using Zephyr's retention driver.

Updates MCUboot revision to pull/574/head to include the backup functionality
Adds a backup retention area for boot request data in the device tree
Introduces a Kconfig option to enable keeping boot preference values across reboots

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
west.yml	Updates MCUboot revision to pull/574/head for backup support
samples/dfu/ab/sysbuild/nrf54h20dk_nrf54h20_memory_map.dtsi	Adds boot_request_backup retention node and chosen reference
modules/mcuboot/Kconfig	Adds configuration option for preserving boot preferences across reboots

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modules/mcuboot/Kconfig

NordicBuilder · 2025-11-17T15:46:53Z

The following west manifest projects have changed revision in this Pull Request:

Name	Old Revision	New Revision	Diff
mcuboot	nrfconnect/sdk-mcuboot@`66d5c91`	nrfconnect/sdk-mcuboot@`024e7d5` (`main`)	nrfconnect/[email protected]

✅ All manifest checks OK

Note: This message is automatically posted and updated by the Manifest GitHub Action.

github-actions · 2025-11-17T16:27:01Z

You can find the documentation preview for this PR here.

Preview links for modified nRF Connect SDK documents:

https://ncsdoc.z6.web.core.windows.net/PR-25627/nrf/samples/dfu/ab/README.html
https://ncsdoc.z6.web.core.windows.net/PR-25627/nrf/samples/dfu/ab_split/README.html

NordicBuilder · 2025-11-17T20:10:52Z

CI Information

^{To view the history of this post, click the 'edited' button above}
Build number: 23

Inputs:

Sources:

sdk-nrf: PR head: ee07b9a5bfaff83c970ac015fd2b83fa6bc28c6b
mcuboot: PR head: 024e7d58d50e2f3237c8aa4ab20dfc2cd79a8455

more details

sdk-nrf:

PR head: ee07b9a5bfaff83c970ac015fd2b83fa6bc28c6b
merge base: 0e0ccced18a0f8e034202da9e8eee13ef88a50f0
target head (main): aec0909ee18f88c76076aceb2bc10358cbb61f0d
Diff

mcuboot:

PR head: 024e7d58d50e2f3237c8aa4ab20dfc2cd79a8455
merge base: 66d5c91c080c0817b24c2e9586d26b57f8c9baf6
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 (24)

bootloader
│  ├── mcuboot
│  │  ├── boot
│  │  │  ├── bootutil
│  │  │  │  ├── include
│  │  │  │  │  ├── bootutil
│  │  │  │  │  │  │ boot_request.h
│  │  │  │  ├── zephyr
│  │  │  │  │  ├── CMakeLists.txt
│  │  │  │  │  ├── src
│  │  │  │  │  │  ├── boot_request.c
│  │  │  │  │  │  ├── boot_request_flash.c
│  │  │  │  │  │  ├── boot_request_mem.h
│  │  │  │  │  │  │ boot_request_retention.c
modules
│  ├── mcuboot
│  │  │ Kconfig
samples
│  ├── dfu
│  │  ├── ab
│  │  │  ├── Kconfig.sysbuild
│  │  │  ├── README.rst
│  │  │  ├── boards
│  │  │  │  │ nrf54l15dk_nrf54l15_cpuapp.conf
│  │  │  ├── prj.conf
│  │  │  ├── src
│  │  │  │  │ ab_utils.c
│  │  │  ├── sysbuild.conf
│  │  │  ├── sysbuild
│  │  │  │  ├── mcuboot
│  │  │  │  │  ├── boards
│  │  │  │  │  │  │ nrf54l15dk_nrf54l15_cpuapp.conf
│  │  │  │  │  │ prj.conf
│  │  │  │  │ nrf54h20dk_nrf54h20_memory_map.dtsi
│  │  ├── ab_split
│  │  │  ├── README.rst
│  │  │  ├── prj.conf
│  │  │  ├── src
│  │  │  │  │ ab_utils.c
│  │  │  ├── sysbuild
│  │  │  │  ├── mcuboot
│  │  │  │  │  │ prj.conf
│  │  │  │  │ nrf54h20dk_nrf54h20_memory_map.dtsi
│  ├── zephyr
│  │  ├── subsys
│  │  │  ├── mgmt
│  │  │  │  ├── mcumgr
│  │  │  │  │  ├── smp_svr
│  │  │  │  │  │  ├── sysbuild
│  │  │  │  │  │  │  ├── mcuboot_requests.conf
│  │  │  │  │  │  │  │ nrf54h20dk_nrf54h20_memory_map_requests.dtsi
west.yml

Outputs:

Toolchain

Version:
Build docker image:

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

◻️ Toolchain
◻️ Build twister
◻️ Integration tests
- ◻️ test-fw-nrfconnect-chip
- ◻️ test-sdk-find-my
- ◻️ test-sdk-mcuboot
- ◻️ test-sdk-dfu

Disabled integration tests

- 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-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-audio
- test-sdk-wifi
- test-secdom-samples-public

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samples/dfu/ab/src/ab_utils.c

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samples/dfu/ab/README.rst

modules/mcuboot/Kconfig

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samples/dfu/ab_split/src/ab_utils.c

samples/dfu/ab/Kconfig.sysbuild

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samples/dfu/ab_split/src/ab_utils.c

samples/dfu/ab/src/ab_utils.c

samples/dfu/ab/README.rst

samples/dfu/ab_split/README.rst

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samples/dfu/ab_split/src/ab_utils.c

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samples/dfu/ab_split/README.rst

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samples/dfu/ab_split/README.rst

samples/dfu/ab_split/src/ab_utils.c

samples/dfu/ab/README.rst

samples/dfu/ab/src/ab_utils.c

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samples/dfu/ab/README.rst

modules/mcuboot/Kconfig

Add a Kconfig option to keep the boot preference between device resets. Ref: NCSDK-35479 Signed-off-by: Tomasz Chyrowicz <[email protected]>

Add additional region to keep the value of boot preference across reboots. Ref: NCSDK-35479 Signed-off-by: Tomasz Chyrowicz <[email protected]>

Copilot AI review requested due to automatic review settings November 17, 2025 15:46

NordicBuilder added manifest changelog-entry-required Update changelog before merge. Remove label if entry is not needed or already added. labels Nov 17, 2025

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tomchy force-pushed the feature/boot_req/NCSDK-35479_Preserve_boot_request_values branch from 68470ac to 74564fc Compare November 17, 2025 15:49

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tomchy added 4 commits November 27, 2025 08:20

mcuboot: Add a possibility to keep boot preference

5c112d5

Add a Kconfig option to keep the boot preference between device resets. Ref: NCSDK-35479 Signed-off-by: Tomasz Chyrowicz <[email protected]>

ab: Enable boot preference persistance

80cf05a

Add additional region to keep the value of boot preference across reboots. Ref: NCSDK-35479 Signed-off-by: Tomasz Chyrowicz <[email protected]>

ab_split: Enable boot preference persistance

6139eec

Add additional region to keep the value of boot preference across reboots. Ref: NCSDK-35479 Signed-off-by: Tomasz Chyrowicz <[email protected]>

smp_svr: Enable boot preference persistance

ee07b9a

Add additional region to keep the value of boot preference across reboots. Ref: NCSDK-35479 Signed-off-by: Tomasz Chyrowicz <[email protected]>

tomchy force-pushed the feature/boot_req/NCSDK-35479_Preserve_boot_request_values branch from bca2b95 to ee07b9a Compare November 27, 2025 07:20

NordicBuilder removed the DNM label Nov 27, 2025

tomchy mentioned this pull request Nov 27, 2025

manifest: sdk-mcuboot: [nrf noup] zephyr: Keep boot preference after reboot #25620

Closed

tomchy merged commit bc30cfa into nrfconnect:main Nov 27, 2025
20 of 21 checks passed

NCSDK-35479: Preserve boot request values during reboot #25627

NCSDK-35479: Preserve boot request values during reboot #25627

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Inputs:

Sources:

Github labels

Outputs:

Toolchain

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

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