Cathy Xu developed hardware-level GPIO and pin control support for the MT8189 and MT8196 platforms, focusing on stability and ease of integration. Working in the zephyrproject-rtos/trusted-firmware-a and geerlingguy/linux repositories, she implemented GPIO drivers and device tree bindings, enabling reliable pin configuration and reducing manual setup for downstream users. Her work involved C and YAML, leveraging skills in embedded systems, driver development, and Linux kernel internals. By updating register mappings and creating comprehensive documentation, Cathy addressed platform compatibility and streamlined bring-up processes. The depth of her contributions reflects a strong understanding of hardware interaction and kernel-level software design.