Powering Up Discoverable Bus-Attached Devices on DT-Based Platforms

Explore the challenges and potential solutions for powering up "discoverable bus-attached" devices on Device Tree (DT) based platforms in this Linux Plumbers Conference talk. Delve into the current limitations where discoverable buses cannot power up devices before discovery occurs, and examine various approaches to address this issue. Consider the implications of modifying bus implementations, making changes at the driver core level, or implementing device-specific workarounds. Investigate the possibility of leveraging Device Tree descriptions to set up device resources prior to bus discovery, potentially offering a more elegant and standardized solution. Gain insights into the complexities of hardware initialization and resource management in Linux-based systems.