January 2026 monthly summary focusing on key accomplishments and business value for the Zephyr project.

December 2025 monthly summary for nrfconnect/sdk-zephyr focusing on reliability improvements in the LPUART driver and overall code quality. The primary work this month centered on fixing initialization reliability by ensuring clock enablement for LPUART, reducing dependence on default settings and stabilizing UART behavior across platforms.

October 2025 monthly summary for zephyrproject-rtos/zephyr-testing. Focused on delivering robust I2S driver improvements with i.MX9 platform support and applying board-level formatting fixes to FRDM-IMX91. The work enhanced driver reliability, broadened platform compatibility, and improved code quality and maintainability, delivering direct business value through reduced integration risk and smoother workflows for developers and testers.

September 2025 monthly summary for zephyr-testing focusing on OpenAMP integration, build stability, and platform support for NXP i.MX. Key accomplishments include delivering OpenAMP resource table integration for i.MX93 multi-core IPC (Cortex-A55 and Cortex-M33) with a new MU1 DT node, correct MU driver selection, and resource table integration through updated linker scripts for M33 and Cortex-A cores. This work enables reliable inter-processor communication and opens the path for Linux interaction on i.MX93 via OpenAMP. Major build and device-tree stability fixes for NXP i.MX: addressed build warnings when no configs are enabled and ensured correct MU driver usage, along with a separate improvement for M7 DT warnings. Top changes were implemented through a series of commits across DT, samples, and linker script updates, including support for imx93evk M33, resource table sections added to linker scripts for Cortex-A and Cortex-M33, and MU driver corrections. Overall impact: strengthened cross-core IPC reliability and platform stability, enabling more robust samples and integration with Linux on i.MX platforms. This improves product readiness for customers relying on i.MX-based MPC/SoC environments and reduces risk in future porting. Technologies/skills demonstrated: OpenAMP/OpenAMP resource tables, device-tree (DT) nodes, linker scripts, MU driver configuration, Cortex-A/Cortex-M IPC considerations, Zephyr build system, CMake/Build reliability, and NXP i.MX platform knowledge.

Month: 2025-07 — Summary: Delivered two significant feature workstreams across Zephyr and related ARM platforms, strengthening multi-core performance, security hardware integration, and test coverage. Key features delivered: - NXP i.MX93 EVK SMP Support for Zephyr RTOS: Enabled symmetric multiprocessing across Cortex-A55 cores on the i.MX93 EVK, improving parallelism and throughput; updates included boards/config, device tree, and YAML board descriptions to define the SMP variant (commit 892520a16f49e1bf2ff2c2b1caa174242185c63c). - TPM support on i.MX943 CA55: Added TPM hardware support with device tree nodes for multiple TPM devices, YAML switch to expose TPM counter, and an EVK-specific test overlay to enable TPM2 on the EVK board (commits a8826adefa4e8b5133d77352f89aa1f15eb08db0; bc0fc4485afef4b5b20e1a7e40a1fa414c1c75da; 266b3aeddc60e94acbbe6575e858b9e15f71cda7). Major bugs fixed: None explicitly reported this month; the focus was on feature enablement and hardware integration to close prior capability gaps. Overall impact and accomplishments: These deliverables extend Zephyr support to more capable i.MX platforms, enabling higher performance (SMP) and enhanced security (TPM) across evaluation boards, with improved test coverage, accelerating customer-ready validation and reducing bring-up time for new SKUs. Technologies/skills demonstrated: Zephyr RTOS development, SMP enablement, device tree and YAML board modeling, TPM 2.0 hardware integration, EVK bring-up, cross-repo collaboration and patch discipline, test overlay design.

June 2025 monthly summary for AmbiqMicro/ambiqzephyr. Delivered LPI2C Device Tree support for the NXP imx91 platform and enabled LPI2C peripherals on the imx91_evk board. This work establishes DT-based hardware integration for LPI2C controllers, enabling faster feature delivery and consistent configuration across boards, while keeping controllers disabled by default for safe initialization. No major bugs fixed this month; focus was on feature delivery and platform readiness.

January 2025: Cross-repo NXP i.MX/MCUX/Zephyr platform enablement and tooling improvements. Delivered new device support, security/performance-related configuration, and build/integration enhancements across MCUX SDK, Zephyr, and West configurations. Result: expanded hardware coverage, improved build reliability, and faster time-to-market for i.MX/NXP platforms with stronger security posture and clearer integration paths.

December 2024 monthly summary for telink-semi/zephyr: Delivered critical platform enhancements and improved build stability through targeted SoC support and dependency pinning. Key features and fixes focused on expanding hardware compatibility and ensuring reproducible builds across environments.

November 2024 performance summary for telink-semi/zephyr. Delivered TPM counter support for i.MX 95 CA55 boards by updating YAML configurations and feature lists; prepared both CA55 and SMP CA55 variants for TPM counter integration. No major bugs fixed this month; focus remained on feature delivery and foreseeing TPM-related compatibility across platforms.

October 2024: Delivered a focused HAL improvement for TPM interrupt handling on CA55-based devices. Implemented TPM_IRQS definition for CA55 header to define interrupt vectors for the TPM peripheral, enabling more reliable and scalable interrupt management for MIMX9596 platforms.

Concise monthly summary for 2022-01 focusing on a single feature/bug fix in nxp-upstream/hal_nxp.