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+.\" $OpenBSD: pchtemp.4,v 1.4 2020/06/20 21:16:14 jmc Exp $
+.\"
+.\" Copyright (c) 2015 Mark Kettenis <kettenis@openbsd.org>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: June 20 2020 $
+.Dt PCHTEMP 4
+.Os
+.Sh NAME
+.Nm pchtemp
+.Nd Intel PCH temperature sensor
+.Sh SYNOPSIS
+.Cd "pchtemp* at pci?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the temperature sensor in the Intel X99,
+C610 series, 9 series and 100 series platform controller hub (PCH).
+.Pp
+These sensors provide 0.5 degC resolution.
+Sensor values are made available through the
+.Xr sysctl 8
+interface.
+.Sh SEE ALSO
+.Xr intro 4 ,
+.Xr pci 4 ,
+.Xr sensorsd 8 ,
+.Xr sysctl 8
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Ox 5.9 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Mark Kettenis Aq Mt kettenis@openbsd.org .
+.Sh CAVEATS
+The temperature sensor only attached if it has been enabled by the
+BIOS.