March 2026 monthly summary for nxp-upstream/zephyr: Focused on expanding hardware support via device tree bindings for MX25U Octal SPI NOR flash. Upstreamed a new devicetree binding for Macronix MX25U series, enabling reliable hardware description and faster board bring-up across platforms. No major bugs fixed in this period; all work targeted upstream compatibility and stability. Key outcomes include stronger hardware coverage and reduced integration risk.

February 2026 monthly summary for nxp-upstream/zephyr: OSPI/XSPI flash driver improvements with new memory overlay support on STM32 Zephyr. Implemented driver configuration simplification and expanded hardware compatibility by enabling MXIC (mxicy) and MX25U flash support via STM32 board overlays and flash_quirks. No major bug fixes reported this month; focus was on refactoring for maintainability and platform readiness. Commit trail highlights code simplification and overlay-based memory configuration, enabling broader support without altering driver logic.

January 2026 (nrfconnect/sdk-zephyr): Delivered device-tree clock-frequency support for STM32 MSPI/OSPI/QSPI and streamlined frequency management. Implemented clock-frequency as a required devicetree binding property and refactored frequency handling to rely on DT instead of Kconfig, improving configurability, traceability, and startup reliability. Additionally, removed an unused OSPI driver function to simplify the codebase and strengthen maintainability. The work enhances SPI peripheral configurability, reduces risk of misconfiguration, and supports more predictable performance across boards. Technologies demonstrated include Devicetree bindings, STM32 SPI drivers, Zephyr DT bindings, and C-based kernel driver development.

June 2025 monthly summary: Delivered SDHC/SDIO support with Wi-Fi enablement on STM32-based Arduino boards (Giga R1, Nicla Vision, Portenta H7) in nrfconnect/sdk-zephyr. Implemented via device tree overlays; configured pinctrl, bus width, and frequency for reliable SDIO operation. Integrated associated Wi-Fi functionality to enable combined storage and wireless usage on target boards. Result: expanded edge device capabilities, improved prototyping speed, and a more complete IoT stack.

May 2025 deliverables focused on SDIO across STM32: Implemented DTS for STM32 SDHI Host Controller enabling 1.8V signaling, GPIOs for SDHI enable/card detect, and detailed clocking/memory mapping and bus width. Added SDIO subsystem write test and Arduino overlays to extend test coverage for WiFi network management. Fixed SDIO_Init failures when card identification is skipped across STM32H7, STM32U5, STM32H5, STM32H7RS, and STM32N6 drivers by relocating init steps and adjusting write sequences, increasing reliability across multiple platforms. These changes improve hardware interoperability, test resilience, and deployment confidence for SDIO-based features.

April 2025 monthly summary focusing on key accomplishments in AmbiqMicro/ambiqzephyr. Delivered STM32 SDHC SDIO driver support, enabling SDHC host controller functionality on STM32 platforms. Implemented necessary configurations, driver files, and APIs, backed by a focused commit. Increased hardware compatibility and platform versatility for SD card integrations.

December 2024 monthly summary for telink-semi/zephyr: Board-level enhancements on the Nucleo U083RC to strengthen ADC and I2C test paths. Delivered DMA-based ADC1 acceleration and I2C2 test enablement, enabling faster and more reliable test runs and broader board support. Implemented DMA controller and DMAMUX configuration for ADC, configured I2C2 pins, and used a fast-mode clock to ensure reliable i2c_target_api tests. Test status was set to 'okay' to reflect stable test outcomes. This work reduces test iteration time, increases coverage for hardware peripherals, and improves overall test reliability on the Zephyr platform. Commits: fb5c4c904266dab31d790b78b269e4c4d91a40f3; d7034e041c37014cfa26f2e4178dc70bba170f3e.

November 2024 (2024-11) monthly summary for telink-semi/zephyr focusing on STM32 platform enablement and peripheral support. Delivered key hardware platform capabilities across STM32 families, enabling broader sensor and peripheral integration with improved performance and maintainability.