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OPPO Kernel Craftsman

Apr 17, 2020 · Fundamentals

Linux Kernel devfreq Framework: Architecture, Interfaces, and Workflow

Linux’s devfreq framework provides a generic DVFS subsystem for non‑CPU devices, defining standardized kernel‑space structures (devfreq_profile, devfreq_governor, devfreq_device) and sysfs user‑space interfaces, and managing device initialization, frequency scaling via governors, and clean removal, enabling flexible power‑performance optimization across heterogeneous SoC components.