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APLCPU(4) Device Drivers Manual (arm64) APLCPU(4)

aplcpuApple CPU power states

aplcpu* at fdt?

The aplcpu driver provides support for managing the CPU power states on Apple SoCs. These power states can be set to reduce power usage and extend battery life through the hw.setperf sysctl(2) mechanism.

sysctl(2), intro(4), apmd(8), sysctl(8)

The aplcpu driver first appeared in OpenBSD 7.1.

The aplcpu driver was written by Mark Kettenis <>.

February 20, 2022 OpenBSD-current