Worked on a major refactor of the Linux I2C driver in the analogdevicesinc/no-OS repository, focusing on enabling combined read and write transactions through the I2C_RDWR interface. The approach involved removing legacy read and write code paths, standardizing function return types from int32_t to int, and enforcing consistent code formatting using AStyle. This update improved the robustness of I2C communication and aligned the driver with current Linux kernel interfaces, reducing the risk of transaction fragmentation. The work was implemented in C and leveraged expertise in driver development, embedded systems, and the I2C protocol to enhance maintainability and future extensibility.