Worked on stabilizing the cross-SoC I2S MCUX SAI driver within the renesas/zephyr repository, focusing on improving compile-time robustness and compatibility across NXP platforms. Addressed a compilation bug by introducing feature macro guards around bit clock swap usage, ensuring the driver builds correctly when certain hardware features are absent or undefined. This defensive coding approach reduced integration risk for MCX E-series and other NXP SoCs, supporting broader hardware coverage. The work demonstrated careful attention to cross-platform driver development in C, with an emphasis on embedded systems and macro-level compatibility patterns, resulting in enhanced build stability and maintainability for Zephyr-based projects.