March 2026 monthly wrap-up for nxp-upstream/zephyr: Strengthened Power Management reliability and observability, with targeted changes to device processing order, error visibility, and maintainability. Delivered governance enhancements to support ongoing PM development and collaboration.

February 2026: Focused on stabilizing the test environment and enhancing timer driver capabilities. Key deliverables include removing obsolete test configuration to resolve Twister build issues, and adding prescaler bypass support to the mcux_lptmr timer driver via devicetree, aligning with the counter driver. These efforts reduced test failures, accelerated feedback loops, and expanded timer configurability for downstream features. Technologies demonstrated include devicetree integration, driver development, and CI/test optimization. Business value: improved reliability, faster iteration, and better platform stability.

January 2026 monthly summary for nrfconnect/sdk-zephyr: Delivered power management enhancements for i.MX95 M7 enabling scalable, SCMI-based control across NETC and core power domains, with device-tree support to simplify integration and deployment. This work improves energy efficiency, platform reliability, and readiness for PM_DEVICE-driven power governance.

December 2025 monthly summary for nrfconnect/sdk-zephyr: Delivered key business and technical outcomes focusing on collaboration, energy efficiency, and reliability. Onboarding and governance: Added Yongxu Wang as Firmware collaborator for the firmware drivers subsystem to sustain SCMI protocol development and maintenance, enabling faster review, testing, and feature delivery. Power management: Implemented PM device support for the LPI2C peripheral, including clock gating during suspend/resume and automatic runtime PM, with DTS adjustments to enable runtime PM auto for all LPI2C instances on i.MX943; supports interrupt-driven suspend/resume via SCMI firmware. Concurrency fix: Introduced mutex protection for SCMI polling mode to prevent concurrent access during interrupt-driven transfers; reduces risk of shared channel state corruption and prevents hangs during I2C initialization on i.MX943.

November 2025 monthly summary for nrfconnect/sdk-zephyr: Delivered SCMI-based system power management and platform readiness for NXP i.MX platforms, with robust cross-component power control and reboot support. Completed device-tree updates and security hardening to enable SCMI on new hardware while maintaining CI quality and backward compatibility.

October 2025: Strengthened Zephyr's power management robustness and timer reliability for the imx943 platform. Delivered critical fixes preventing out-of-bounds access in the pm_mcore loop and corrected prescaler bypass handling in MCUX LPTMR timer driver, improving system stability, power efficiency, and hardware compatibility.

September 2025 (2025-09) — Zephyr project: Delivered core power management enhancements for i.MX943 Cortex-M (M33/M7), refined SCMI driver error handling for reliability, and improved sample quality and configuration stability. Key outcomes include initial PM flow integration, DTS-defined CPU power states, and utilities to aid debugging and configuration; simplified SCMI error handling with direct status conversions; and documentation/sampling fixes to prevent confusion and runtime issues. These changes drive better energy efficiency, system reliability, and developer experience, enabling easier integration of power-aware designs and smoother SCMI-based communications in embedded deployments.

August 2025 (zephyrproject-rtos/zephyr): Implemented CPU power-management enhancements and fixed wake-mask behavior to improve power efficiency and sleep reliability. Delivered a shell interface for power state management, added an SCMI CPU wake-mask API for the NXp driver, and resolved a wake-up interrupt mask bug on i.MX95 M7 to prevent premature wakeups and ensure correct mask restoration. This work reduces wake events, improves low-power timing integrity, and demonstrates strong Linux kernel PM, SCMI, and vendor-driver integration skills.

July 2025 performance summary: Delivered critical boot, power-management, security, and hardware-enablement features across multiple Zephyr-based repositories, with targeted bug fixes to improve reliability and scheduling. These efforts significantly reduce boot dependencies, enhance low-power behavior, strengthen security posture, and improve hardware-timed control capabilities across i.MX platforms.

In 2025-06, delivered a targeted bug fix for the SCMI driver in the nrfconnect/sdk-zephyr repository to improve polling-mode interrupt handling. Introduced scmi_interrupt_enable to control interrupt state, ensuring interrupts are disabled before sending a message and re-enabled after in polling mode. This prevents unintended interrupts and related performance issues, leading to more stable SCMI communication in polling configurations and better power efficiency.

May 2025 monthly summary for development across nxp-upstream/hal_nxp and AmbiqMicro/ambiqzephyr. Key deliverables include memory mapping bug fix for EDMA on M7, platform build groundwork for IMX95 CM7, and DMA enhancements including LPUART5 DMA and EDMA v5 compatibility. These efforts improved EDMA memory mapping reliability, prepared the IMX95 CM7 platform path in SDK NG, and delivered higher-throughput DMA capabilities with improved TCD handling. The work strengthens product reliability, accelerates platform readiness, and demonstrates cross-repo collaboration, system-level optimization, and modernization of the EDMA driver stack.

Month 2025-04 — AmbiqMicro/ambiqzephyr: Delivered LPTMR2 timekeeping peripheral support on the imx95_m7 board, enabling timekeeping and time-based scheduling via counter_basic_api. Introduced a device-tree node (disabled by default) and added DTS/YAML enablement for imx95_evk_mimx9596_m7. Commits include adding the lptmr2 node and enabling the interface. This work lays the groundwork for precise timing, improved scheduling reliability, and future power-management enhancements.