March 2026: Delivered GPIO support for the nRF54H20 FLPR core in Zephyr with Twister-ready overlays; extended GPIO test overlays in SDK-NRF to enable FLPR core tests under Twister. No major bugs fixed were documented in this period; emphasis was on feature delivery, testing readiness, and cross-repo alignment. Impact: faster validation of GPIO functionality on Nordic hardware, improved test automation, and stronger cross-repo consistency. Technologies: Zephyr GPIO subsystem, Nordic FLPR core, Twister testing framework, test overlays, DCO-compliant commits.

February 2026 highlights two cross-repo feature optimizations for NRF54H20 PPR core with XIP: (1) performance improvement by adjusting max shortest ticks, and (2) sleep optimization for XIP configuration. These changes, validated through kernel sleep tests, reduce wake/sleep latency and improve power efficiency on NRF54H20-based devices. Commits include 802a7d44bc205b4d5bcac11e7a04f724ba645649 and 125afecddd055341bb064102bfae795fc7aadfcd, with sign-offs by Paweł Pelikan.

Monthly summary for 2025-12: HAL Nordic module upgrade to latest revision in nrfconnect/sdk-zephyr with manifest updates to reflect the new hal_nordic revision, ensuring hardware abstraction layer aligns with latest Nordic changes. Two commits were applied (one direct update and one from-tree cherry-pick) with signed-off provenance. No major bugs fixed this month; focus was on integration and stabilization of the HAL upgrade.

Month 2025-11: NRF54H20 test stability and performance improvements for nrfconnect/sdk-zephyr. Focused on tuning the system clock and sleep timings to improve test performance and reliability on slower NRF54 platforms. Result: more deterministic CI results and faster feedback loops.

September 2025 monthly summary for zephyrproject-rtos/zephyr-testing focused on delivering a critical sleep-duration accuracy fix for the NRF54H20 PPR core and reinforcing kernel timing reliability. The changes align with our hardware-specific configurations and high tick-rate scenarios, improving predictability of sleep periods in time-sensitive workloads.

November 2024 | Telink Semiconductor (telink-semi/zephyr): Delivered Global Domain Frequency Scaling (GDFS) service integration for Nordic Semiconductor HAL, enabling smarter power and performance management. Added configuration options and build-system integration (Kconfig and CMakeLists.txt) to enable and utilize the new service. Implemented under commit 630f716c2f4b1cf630af8d34f2ac2a76da27f92f, establishing a foundation for dynamic domain scaling.