1cc60ae8d8
- Inconsistencies in .Dd like abbreviated month names, "th" after numbers, or leading zeros - No line breaks after a sentence stop - Whitespace at the end of the line - Use macros for BSD OS names instead of hardcoded names - CAVEATS instead of CAVEAT in section name No actual content change in terms of additions were made, so no bump of the .Dd for these man pages. All of these issues were found and fixed by Gordon Bergling. Submitted by: gbergling_gmail.com Approved by: bcr Differential Revision: https://reviews.freebsd.org/D24648
118 lines
3.9 KiB
Groff
118 lines
3.9 KiB
Groff
.\"
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.\" Copyright (c) 2020 Takanori Watanabe <takawata@freebsd.org>
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd March 15, 2020
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.Dt pchtherm 4
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.Os
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.Sh NAME
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.Nm pchtherm
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.Nd Intel PCH thermal subsystem
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.Sh SYNOPSIS
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.Cd "device pci"
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.Cd "device pchtherm"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides access to sensor data and configuration
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installed in Intel PCH chipset.
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.Nm
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configuration register.
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.Pp
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The access to
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.Nm
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data is made via the
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.Xr sysctl 8
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interface:
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.Bd -literal
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dev.pchtherm.0.ctt: 115.0C
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dev.pchtherm.0.temperature: 28.5C
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dev.pchtherm.0.t2temp: 91.0C
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dev.pchtherm.0.t1temp: 86.0C
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dev.pchtherm.0.t0temp: 81.0C
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dev.pchtherm.0.tahv: 83.0C
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dev.pchtherm.0.talv: 30.0C
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dev.pchtherm.0.pmtime: 32
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dev.pchtherm.0.pmtemp: 50.0C
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dev.pchtherm.0.%parent: pci0
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dev.pchtherm.0.%pnpinfo: vendor=0x8086 device=0x9d31 subvendor=0x17aa subdevice=0x2256 class=0x118000
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dev.pchtherm.0.%location: slot=20 function=2 dbsf=pci0:0:20:2
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dev.pchtherm.0.%driver: pchtherm
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dev.pchtherm.0.%desc: Skylake PCH Thermal Subsystem
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dev.pchtherm.%parent:
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.Ed
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.Bl -tag -width ".Va dev.pchtherm.%d.pch_hot_level"
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.It Va dev.pchtherm.%d.temperature
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Is the read-only value of the current temperature read by the sensor.
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.It Va dev.pchtherm.%d.ctt
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When the system reaches this temperature, it will shut down.
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This will not appear when this feature is disabled and locked down.
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.It Va dev.pchtherm.%d.t0temp
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When temperature is under this value, system will be in T0 state.
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.It Va dev.pchtherm.%d.t1temp
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When temperature is over
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.Va t0temp
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and under this value, system will be in T1 state.
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.It Va dev.pchtherm.%d.t2temp
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When temperature is over
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.Va t1temp
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and under this value, system will be in T2 state.
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Over this value, system will be in T3 state.
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.It Va dev.pchtherm.%d.talv
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Lower alart value.
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This will not appear when sensor enable bit is locked down and the value is zero(which will show -50.0C).
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.It Va dev.pchtherm.%d.tahv
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High alart value.
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This will not appear when sensor enable bit is locked down and the value is zero(which will show -50.0C).
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.It Va dev.pchtherm.%d.pmtemp
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Sensor Power management temperature.
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Under this temperature, sensor will idle during
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.Va pmtime
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second.
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.It Va dev.pchtherm.%d.pmtime
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Sensor idle duration when low temperature.
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.It Va dev.pchtherm.%d.pch_hot_level
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When temperature is higher than this value, PCHHOT# pin will assert.
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This value is not appear when this feature is disabled and locked down.
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.El
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.Pp
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Please check the PCH datasheets for more details.
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.Pp
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.Sh CAVEATS
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All values are read-only.
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And it do not support event interrupt for now.
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.Sh SEE ALSO
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.Xr sysctl 8
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 13.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver and this manual page were written by
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.An Takanori Watanabe Aq Mt takawata@FreeBSD.org .
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