March 2026 (2026-03) monthly summary for nxp-upstream/zephyr focused on stabilizing STM32WBA power management build paths. Key outcome: a critical build issue was resolved by guarding the mpu_state with CONFIG_ARM_MPU, enabling correct builds when CONFIG_PM=y and CONFIG_ARM_MPU=n. This change was implemented in commit 2f18cf906b1f6158e58a86f6f574ae50bf2972d4. The work reduces cross-configuration build failures and improves maintainability for PM-enabled scenarios on STM32WBA.

February 2026 monthly summary for nxp-upstream/zephyr focusing on delivering STM32WB VREFBUF Regulator Support. This period delivered a targeted feature enabling internal reference buffer functionality on STM32WB devices by extending the regulator driver, adding device-tree bindings, and wiring the new node in the STM32WB SoC dtsi. No major bugs fixed this month. Impact includes improved hardware compatibility, faster enablement of applications using internal reference buffers, and a foundation for further STM32WB platform enhancements. Technologies demonstrated include Linux kernel regulator subsystem extension, device-tree bindings, and SoC dtsi integration, with changes committed in 0147f357c68043594072cfcc726ed22c6b0d837c.

February 2025 monthly summary for telink-semi/zephyr focusing on feature delivery and platform improvements for the Nucleo WBA55CG. Key achievements were delivered across PWM LED control, MCO clock output, and UART compatibility, enabling faster hardware bring-up and broader usage scenarios for STM32WBA devices.