Explore the evolution and implementation of the Serial Device Bus in Linux systems through this informative conference talk. Delve into the historical context of UARTs and RS-232, examining their continued relevance in modern embedded systems. Learn about the limitations of traditional kernel infrastructure for UART-attached devices and discover how the Serial Device Bus aims to address these challenges. Gain insights into the design and interfaces of this newly merged bus, its integration with the Linux device model, and potential future enhancements. Benefit from the expertise of Johan Hovold, maintainer of the kernel's USB Serial and Greybus subsystems, as he shares his experience and knowledge on this crucial aspect of embedded Linux development.