April 2026 monthly summary for Zephyr4Microchip/zephyr: Implemented SDA hold time configuration for DesignWare I2C controllers with nanosecond precision, plus a safe fallback to legacy behavior. This enables deterministic I2C timing across platforms, improves hardware compatibility, and reduces field debugging time.

Concise monthly summary for 2026-03 focusing on features delivered and impact. The primary deliverable this month was adding device tree overlay support for Quadrature Decoder (QDEC) on STM32U0 TIM1-TIM3 within Zephyr. This DT coverage-only enhancement enables boards to opt-in to QDEC functionality via overlays without altering runtime behavior, improving hardware configurability and future-proofing for STM32U0 targets. The patch adds disabled-by-default DT nodes (st,stm32-qdec) under TIM1-TIM3 to support overlay-based enablement and directly addresses a DT coverage gap (Fixes #88902). Impact includes smoother board bring-up, improved test coverage, and clearer DT-driven configuration for QDEC across STM32U0-based boards. Technologies/skills demonstrated include device tree overlays, Zephyr DT bindings, STM32U0 platform familiarity, patch hygiene, and collaboration with maintainers.