Monthly summary for Zephyr MEC (Zephyr4Microchip/zephyr) in 2026-05 focusing on stability enhancements around PIN assertion timing in the I2C driver. The change increases the PIN assertion timeout from 2000 μs to 10000 μs to ensure reliable hardware response, aligning with previous driver implementations and reducing timeout-related hardware flakiness.

Summary for 2026-02: Focused on strengthening the reliability of the GPIO interrupt path in Zephyr on Microchip hardware. Delivered a fix to ensure the GPIO interrupt aggregator is re-enabled after configuration, preventing interrupts from remaining disabled due to an early return in the configuration function. Implemented in Zephyr4Microchip/zephyr (commit 1d12eb64e3df4951151d3e2dc162163b9df4acfb). Key achievements: - Fixed a bug where IDET equality allowed early exit, ensuring level/edge bookkeeping and interrupt aggregator enable state are updated every time; - Reaffirmed interrupt reliability across reset paths; - Reduced risk of missed interrupts and improved system stability in GPIO handling. Technologies: C, Linux kernel driver development, GPIO/Interrupt handling, repository Zephyr4Microchip/zephyr, debugging hardware-software integration.

January 2026 monthly summary focusing on reliability and correctness in UART TX handling within the Zephyr project. Delivered a targeted bug fix to UART TX complete status reporting in the MCHP XEC driver, ensuring completion is reported only when the hardware actually indicates an empty TX path. This prevents false progress decisions in flush workflows and reduces risk of stalls. Impact highlights: Improved robustness of the TX flush path, reduced flaky behavior in data flushing, and smoother system operation under load. The change is captured in commit 9ae9d167e366111a2c1d37a04c790912549dc364 with full authoring and review by Bernardo Perez Priego. Technologies/skills demonstrated: C, embedded systems debugging, hardware register interaction, rigorous condition validation, code review and maintainability practices, and adherence to Zephyr project coding standards.