A Linux Kernel Engineer who enjoys poking at hardware until it works. By day, I wrangle the kernel for Tizen smart devices at Samsung. Before that, I was at Intel taming 100G networking drivers.
This blog is my field notebook for low level adventures in drivers, performance tuning, eBPF, and bringing safe Rust to the kernel.
Introduction: Why Rust for PWM? For the past few months, I’ve been on a mission to introduce a basic set of safe Rust abstractions to the Linux kernel’s PWM subsystem. If you’ve ever controlled the brightness of an LED or the speed of a fan, you’ve used PWM. It’s a fundamental part of how software interacts with hardware. The primary goal was to see if I could build an API that lets developers write PWM drivers in 100% safe Rust, gaining all the benefits of the language’s memory safety and powerful type system. As a practical demonstration, I also wrote a functional PWM driver for the T-HEAD TH1520 SoC, which is found on the popular Sipeed Lichee Pi 4A board. ...