drivers: flash_sync_mpsl: Reduce timeout for low priority attempt

[rugeGerritsen]

This commit reduces the time it takes to elevate the priority of a flash operation from 30 ms to 10 ms.

In applications where the radio is heavily used, this improves the responsiveness. Examples of such application types:

• Bluetooth applications using relatively low connection intervals
• Bluetooth applications perfoming background scanning
• 802.15.4 applications
• Bluetooth LE audio applications

For applications where this is not the case, it is unlikely that any behavior change will be seen.

This change also prepares the driver for fixing a bug in the scheduler where the timeslot request timed out before the specified timeout.

[Copilot]

Pull Request Overview

This PR reduces the default timeout for normal priority MPSL flash operations from 30ms to 10ms to improve responsiveness in radio-intensive applications. The change affects applications using low connection intervals, background scanning, 802.15.4, or Bluetooth LE audio by reducing the time before flash operations are elevated to higher priority.

Key Changes

• Reduced default timeout from 30000µs to 10000µs in the flash sync MPSL Kconfig
• Updated release notes to document the default timeout change

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
drivers/mpsl/flash_sync/Kconfig	Changed default timeout value from 30ms to 10ms
doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst	Added release note documenting the timeout reduction

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[NordicBuilder]

CI Information

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Build number: 1

Inputs:

Sources:

sdk-nrf: PR head: 1bddc4a899472791a23bbd6e3db04214b36f9e63

more details

sdk-nrf:

PR head: 1bddc4a899472791a23bbd6e3db04214b36f9e63
merge base: d8494e3b06d938e6eeac65fb1508c27691512908
target head (main): 892fa5af165bfd21430ac04d91fdec731fa893d2
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)

doc
│  ├── nrf
│  │  ├── releases_and_maturity
│  │  │  ├── releases
│  │  │  │  │ release-notes-changelog.rst
drivers
│  ├── mpsl
│  │  ├── flash_sync
│  │  │  │ Kconfig

Outputs:

Toolchain

Version: df3cc9d822
Build docker image: docker-dtr.nordicsemi.no/sw-production/ncs-build:df3cc9d822_e595b21c39

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

• ◻️ Toolchain - Skipped: existing toolchain is used
• ✅ Build twister
  • sdk-nrf test count: 1087
• ✅ Integration tests
  • ✅ test_ble_nrf_config
  • ✅ test-fw-nrfconnect-ble_samples
  • ✅ test-fw-nrfconnect-chip
  • ✅ test-fw-nrfconnect-rs
  • ✅ test-fw-nrfconnect-fem
  • ✅ test-fw-nrfconnect-thread-main
  • ✅ test-sdk-find-my

Disabled integration tests

• • test-fw-nrfconnect-nrf_lrcs_positioning
  • desktop52_verification
  • test-fw-nrfconnect-apps
  • test-fw-nrfconnect-ble_mesh
  • 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-tfm
  • test-low-level
  • test-sdk-audio
  • test-sdk-dfu
  • test-sdk-mcuboot
  • test-sdk-wifi
  • test-secdom-samples-public

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

[github-actions]

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-25569/nrf/releases_and_maturity/releases/release-notes-changelog.html