April 2026 monthly summary for the zephyr project (repository: zephyrproject-rtos/zephyr). Focus this month was enabling NRF7120 PWM support and refining the memory layout to improve hardware compatibility and resource predictability. Delivered an updated Nordic nrf7120 NS YAML to include PWM support and aligned RAM/FLASH sizes to the slot0_ns partition, enabling deterministic PWM behavior and safer memory planning for future features. Impact includes accelerated NRF7120-based board bring-up, reduced memory-overflow risk, and improved maintainability and traceability through explicit configuration and commit history. Technologies demonstrated include YAML-based hardware configuration, memory partitioning for isolation, and disciplined version control practices.

March 2026: Delivered NRF7120 hardware support and platform testing enhancements across nrfconnect/sdk-nrf and Zephyr, aligning initialization with SOC changes, expanding TLS verification, and integrating NRF7120 into TF-M testing overlays and non-secure targets. These changes strengthen hardware validation, security testing coverage, and readiness for new NRF71/NRF7120 platforms.

February 2026: Delivered critical stability and configurability enhancements for Nordic nRF71 on Zephyr-based platforms, with cross-repo alignment across Zephyr and sdk-zephyr. Key improvements include fixing non-secure mode memory partitioning to prevent overlaps with secure RAM and correcting ANTSWC handling for non-secure operation, plus introducing a configurable Wi‑Fi core initialization path to avoid CI failures. The changes were implemented through DTS and SOC driver updates and propagated to the sdk-zephyr tree via cherry-picks to ensure consistent upstream behavior. These efforts reduce CI flakiness, strengthen security and reliability of non-secure samples, and enable safer control of Wi‑Fi boot in ns scenarios.

January 2026 monthly summary focusing on delivering NRF7120 platform capabilities, strengthening security posture, and streamlining cross-repo initialization. Key work includes platform enhancements for NRF7120, TrustZone security integration, and alignment of initialization flows with NRFX 4.0 standards across NRF SDK, Zephyr, and TF-M. The work improves security, reliability, and maintainability, enabling faster, secure deployments for Nordic NRF-based products.

Month: 2025-11. Focused delivery on NRF7120 Wi-Fi functionality within the NRF SDK and security hardening to support secure and non-secure build paths. Key work consolidated in the nrfconnect/sdk-nrf repository, with changes spanning SoC initialization, build configurations, and firmware manifest alignment. Key outcomes: - Enhanced NRF7120 Wi‑Fi support and security hardening in NRF SDK, enabling wifi functionality and hardened setup for non-secure builds. - MPC/SPU configuration alignment across secure and non-secure builds via soc.c updates in the NRF7120 path. - Firmware chain integrity improved by updating the trusted firmware manifest to reflect the Wi‑Fi changes. Why it matters: these changes improve device security posture, memory protection, and Wi‑Fi reliability for NRF7120-based deployments, while reducing maintenance overhead by aligning build paths and firmware references. Commits of record: - 5d65d005239d49592d250c928d94a359e0ccbb7d: soc: nordic: nrf7120: Update wifi for ns build; updates non-secure wifi setup and MPC/SPU configuration separation between secure and non-secure builds. - 34283c19bd979bf5f337142f765054834d35cc7a: manifest: update sdk-trusted-firmware-m; points to nrf7120 wifi support changes. Overall scope: single-repo, targeted feature/bug fix with cross-cutting security improvements and manifest alignment.

October 2025 performance summary focusing on feature delivery and platform improvements for Nordic SoCs.

Month: 2025-09 — Focused on enabling Trusted Firmware-M (TF-M) integration for NRF7120 across the Nordic stack. Delivered native TF-M support in the nRF Connect SDK and established initial NRF7120 TF-M platform support in Trusted Firmware-M, laying groundwork for secure/non-secure build paths and secure application capabilities. This work reduces integration friction between TF-M and NRF7120 boards, aligning Kconfig, startup, and target configurations across repositories and enabling streamlined secure build workflows.

July 2025: Focused on enabling nRF7120 hardware support, aligning MRAM/dt configurations, and optimizing flash cache paths across Nordic and Zephyr components, while improving test coverage and code quality. Key outcomes include: - nRF7120 hardware integration in CRACEN driver: integrates the nRF7120 device into CRACEN, updates device tree and Kconfig to recognize and utilize CRACEN hardware, and adds test coverage for the nRF7120 flash driver in Zephyr, including negative scenarios. - Commits: 879e8c064d7dfb14f6afc19f88723ee026dab7f2; 28d2a81b9ef89626d93107af83426385cb530870 - MRAM controller DT integration and naming alignment for nRF7120: relocates the MRAM controller DT into the secure peripherals section and aligns MRAM node compatible/macro for the nRF7120 configuration, ensuring correct driver association. - Commits: 75430abaf1a5e2f33a25479a22783540cf15c849; 2ae642f063fd1a467a0d20710095efa84d753318 - Cache configuration support for nRF7120 SoC in Zephyr: adds cache configuration options (Kconfig) and enables external cache by default to support cache management features. - Commit: 98cf861d9c7a647393ae24c07192e1f06724575b - Code quality improvements: formatting cleanups in nrf_mramc drivers to improve readability and consistency (no functional changes). - Commits: d1bf6d42716c9e662dd55393c842e83eb5d41f9f; 64131856199342d0cb6507e5c57355c82f24dd69 - Cache invalidation optimization after flash writes: removing unnecessary cache invalidation after flash writes; relies on CPU automatic invalidation and alternate bus to optimize flash operations while preserving correctness. - Commit: 142b7e6a6ba865e99abca1f326a302df7e5647c1 - Cross-repo alignment: NRF nrf_mramc cache invalidation optimization reflected in Zephyr (NRF mramc) to ensure consistent behavior across platforms. - Commit: 5274d6601922d25f6efa67031b1d691678140f6e Overall impact: platform readiness for nRF7120 hardware deployments, improved flash performance through reduced cache invalidation, higher code quality, and broader test coverage reducing risk of regressions. Technologies demonstrated: Zephyr RTOS, device tree (DTS), Kconfig, flash/mramc driver architecture, cache management, and robust testing practices.

June 2025 monthly summary focusing on MRAM storage enablement for Nordic and Ambiq platforms. Delivered MRAM-backed storage option for nRF7120 through a DTS overlay and build-system mapping, and introduced a Nordic MRAM controller driver in Zephyr RTOS with basic operations. These changes establish foundational MRAM storage support, enabling more resilient and higher-performance data storage across Nordic and Ambiq-based devices.

May 2025 performance summary: Delivered key timing, testing, and cross-configuration improvements for NRF7120 and NRF Cache configurations, enhancing hardware emulation fidelity, testability, and reliability across platforms. The work directly supports faster validation cycles, reduced debugging time, and greater stability for production deployments, with a focus on business value through robust timing, test instrumentation, and cross-configuration cache management. Technologies demonstrated include device tree updates for clock sources, Zephyr timer overlays, NRFX core delay tuning, and macro-driven cache handling across NRF variants.