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SYSCON(4) Device Drivers Manual SYSCON(4)

sysconSystem controller

syscon* at fdt?

The syscon driver provides access to a set of miscellaneous hardware registers to other device drivers. The driver may also provide system reset and power off functionality if such functionality is provided through hardware registers in such a set.


The syscon driver first appeared in OpenBSD 6.1.

The syscon driver was written by Mark Kettenis <>.

April 1, 2018 OpenBSD-current