RK3588 Bring-Up: U-Boot, Kernel, and Signal Integrity

The RK3588 SoC features a quad-core Arm Cortex-A76/A55 CPU, a Mali-G610 GPU, and a highly flexible I/O architecture that makes it ideal for embedded Linux SBCs like the Radxa Rock 5B+.

I’ve been exploring and documenting board bring-up for this platform, including U-Boot and Linux kernel contributions, device-tree development, and tooling for reproducible builds and signal-integrity validation. Most of this work is still in active development and early upstream preparation.

I’m publishing my notes, measurements, and bring-up artifacts here as the work progresses, while active U-Boot and kernel development including patch iteration, test builds, and branch history are maintained in separate working repositories:

Signal Analysis / Bring-Up Repo: https://github.com/brhinton/signal-analysis

The repository currently includes (with more being added):

• Device-tree sources and Rock 5B+ board enablement 
• UART signal-integrity captures at 1.5 Mbps measured at the SoC pad 
• Build instructions for kernel, bootloader, and debugging setup 
• Early patch workflows and upstream preparation notes

Additional U-Boot and Linux kernel work, including mainline test builds, feature development, rebases, and patch series in progress, is maintained in separate working repositories. This repo serves as the central location for measurements, documentation, and board-level bring-up notes.

This is ongoing, work-in-progress engineering effort, and I’ll be updating the repositories as additional measurements, boards, and upstream-ready changes are prepared.