March 2026 summary for nxp-upstream/zephyr focusing on feature delivery and reliability improvements. Key features delivered: W25Q256 flash memory support added to the flash_mcux_flexspi_nor driver, enabling correct 4-byte addressing mode and preventing bootROM compatibility issues on selected NXP MCUs. Major bugs fixed: clock-less read avoidance in MCUX FlexComm by adding clock attach verification to prevent reads when clock is missing, eliminating potential infinite loops in transmission. Overall impact: improved hardware compatibility, runtime reliability, and boot stability across NXP targets, enabling smoother deployments and reducing field failures. Technologies demonstrated: embedded C, MCUX FlexSPI/NOR driver development, 4-byte address mode handling, defensive peripheral access patterns, clean commit hygiene.

December 2025: Delivered critical power-management improvements across two Zephyr-based repositories, boosting reliability in low-power operation and reducing post-wake reconfiguration. Key deliverables: - PWM power-management support for pwm_mcux_sctimer (PM actions; save/restore PWM channel configurations after exiting low-power PM3). - UART interrupt settings preserved during power-management transitions to prevent loss of configuration. Commits reference: 726e7b64c24f2fa559f591ed7cbcfcf8372194d0; 9cbc6616c1549369e9ce7af34a47d4ffa88344f1. Impact: improved stability in battery-powered scenarios, lower maintenance costs, and better customer experience. Technologies/skills demonstrated: power-management architecture, interrupt handling, cross-repo collaboration, C/driver development.

November 2025: Feature delivery and stability improvements in UART power management for nrfconnect/sdk-zephyr. Implemented per-instance interrupt state save/restore across power state transitions to support multi-UART configurations.

In Oct 2025, delivered a targeted cross-platform stability improvement for the APS6404L memory driver in nxp-upstream/zephyr by removing the addressShift field, addressing build-time errors observed across platforms and improving driver reliability. The change simplifies configuration, reduces platform-specific failures, and aligns with upstream Zephyr practices.