April 2026 monthly summary for the nxp-upstream/zephyr repository. The focus this month was feature delivery for keyboard scanning (kscan) with cross-series enablement on MEC174x/5x/165xb devices, delivering improved power efficiency and broader hardware support. The work emphasizes maintainability and performance while expanding platform coverage.

March 2026: Delivered essential MEC hardware support in Zephyr, standardizing BBRAM access and hardware crypto across Microchip MEC174x/5x/165xb. These updates streamline bring-up, reduce integration risk, and position Zephyr for broader MEC ecosystem adoption. Key work spans two repos with device-tree and macro-driven changes enabling consistent hardware initialization and secure crypto paths.

February 2026 (2026-02) — Focused on delivering a hardware-facing feature in the Zephyr upstream for Microchip MEC EEPROM. Implemented enhancements to the EEPROM driver by updating device tree settings (PCR and GIRQ properties) and configuring pinctrl for internal MEC EEPROM access, preparing MEC5 hardware support. This work improves reliability and hardware compatibility, enabling smoother MEC EEPROM integration in subsequent releases. No explicit major bugs fixed this month.