May 2026 (2026-05) focused on stabilizing the Zephyr test suite and ensuring robust test results in the Zephyr4Microchip/zephyr repository. The key action was removing an invalid failing test case that lacked parameter checks, which significantly improved test reliability and reduced false positives in CI.

April 2026: Delivered robustness improvements to the Zephyr Display Driver API with added API-level assertions and expanded test coverage for display callbacks on ST targets with LTDC. The work ensured safer registration of callbacks and stronger validation of display event handling, supporting more reliable hardware integration and fewer runtime issues in production deployments. Key commits include API safety and display callback tests across ST LTDC targets.

March 2026 (2026-03) — Delivered a new LTDC display callback API in the Zephyr RTOS LTDC driver to support VSync and line interrupt events, enabling precise display synchronization and event-driven rendering.

June 2025: Implemented HSPI support with external HSPI flash and GT911 touchscreen driver for STM32U5G9J-DK2 in AmbiqMicro/ambiqzephyr. Enabled external loader flashing via STM32CubeProgrammer and prepared device-tree and I2C/SPI configurations for future peripherals. These changes improve hardware interoperability, testability, and user experience on this board.