Worked on the flipperdevices/u-boot repository to enhance GPIO driver compatibility with live device trees, focusing on the 74x164 GPIO controller. Updated the driver to use dev_read_* APIs, replacing flat-FDT parsing to ensure seamless property reads for both live and flat device trees. This change resolved historical binding issues and enabled full 32-GPIO exposure across a four-chip daisy chain on the stm32mp153d-ssonic board. The work involved C programming and embedded systems expertise, aligning code structure with established DM GPIO driver patterns and removing unused global data, which improved maintainability and consistency across device driver implementations.