2026-03 Monthly Summary for nxp-upstream/zephyr: Implemented Cross-SoC SERCOM UART G1 macro standardization for PIC32CZ_CA by adding a mapping file and integrating it into the build workflow. Commit 630e9edee2dc20526e52dde68610e81b9bffac1e added the mapping file via west.yml to standardize macros across SoCs, improving cross-SOC compatibility and developer experience. No major bugs fixed this month. Impact: reduces maintenance burden and accelerates multi-SOC integration for the SERCOM UART G1 driver; foundation for future macro standardization. Technologies: macro mapping design, West build workflow, Git commit governance, PIC32CZ_CA SERCOM UART G1 driver.

February 2026 performance summary focusing on cross-SoC SERCOM UART G1 development for Microchip and nxp Zephyr upstream, with emphasis on business value, maintainability, and multi-SoC portability. Delivered standardized driver abstractions, board integration, and improved reliability across multiple SoCs; actions span DTS updates, macro mappings, and interrupt handling enhancements.

January 2026: Delivered critical DMA-enabled UART path enhancements and IoT-ready I2C support for Microchip-based platforms, along with reliability fixes and expanded test coverage. Implemented user-configurable DMA for asynchronous UART in the Microchip SERCOM G1 driver, added dedicated test configuration files, and brought I2C support to PIC32CM JH01 CPRO with multi-version SERCOM G1 bindings. Also fixed I2C transfer reliability in both polling and interrupt modes, closing key reliability gaps across platforms. These efforts extend hardware compatibility, improve runtime efficiency, and reduce integration risk for production deployments.

Concise monthly summary for 2025-12 focused on delivering key features, expanding hardware support, and strengthening validation to accelerate value delivery. In nrfconnect/sdk-zephyr, the work this month targeted performance, compatibility, and testing coverage, enabling faster integration and more robust deployments.

In Nov 2025, delivered a comprehensive set of DMA-enabled serial and flash capabilities across two Zephyr repositories, enabling higher efficiency and broader hardware support for Microchip PIC32CX SG and PIC32CZ CA series boards. The work focused on DMA-driven peripherals, robust boot/partitioning, and scalable build support, with concrete changes across device trees, drivers, bindings, and platform configurations.

October 2025 contributions focused on feature-driven hardware integration for Microchip peripherals in Zephyr, delivering I2C SERCOM G1 on sam_e54_xpro and TRNG entropy for Microchip TRNG G1. Implementations include driver code, device-tree bindings, and board configuration for rapid customer adoption. No major bugs fixed this month; emphasis on integration, build readiness, and security enhancements that enable broader Microchip-based deployments.

2025-09 monthly summary for zephyr-testing: Implemented MCUBoot bootloader enablement on SAM E54 XPRO with NVMCTRL bindings, boot partitions, and expanded CI/test coverage. This work increases secure-boot readiness for the board and extends bootloader support in the Zephyr test matrix. Hardware bindings and device-tree updates were added to reflect NVMCTRL flash controller usage and new boot partitions, enabling reliable MCU boot paths. CI/test coverage now validates MCUBoot builds on sam_e54_xpro, broadening test coverage and reducing boot-related regressions. Test harness and platform allowlists were updated to enable MCUBoot tests on the target board.

July 2025 monthly summary focusing on key accomplishments: delivered Microchip NVMCTRL G1 Flash Driver integration with Zephyr, enabling core flash management operations and extended capabilities. The driver adds read/write/erase with user-row access and region locking, integrated into Zephyr flash API for supported Microchip devices. This work lays the foundation for broader Microchip hardware support, improves device initialization and reliability, and positions the project for future security features and testing.