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ACPIFAN(4) NetBSD Kernel Interfaces Manual ACPIFAN(4)
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by Kimmo Suominen.
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acpifan -- ACPI Fan
acpifan* at acpi?
The acpifan device driver supports fans possibly exposed by the BIOS.
Even if a system contains only one physical fan, multiple acpifan
instances may be present. In such cases each acpifan typically repre-
sents an acpitz(4) thermal zone, and the combined state of all instances
reveals the speed of the fan.
The acpifan driver does not support controlling the fan. The current
state (on or off) is made available through the envsys(4) API and the
The acpifan device driver appeared in NetBSD 6.0.
Jukka Ruohonen <email@example.com>
The acpifan driver does not yet support additional functionality intro-
duced in the ACPI 4.0 specification.
NetBSD 7.1.2 January 9, 2011 NetBSD 7.1.2