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				.\"
				.\" Copyright (c) 2020 Takanori Watanabe <takawata@freebsd.org>
				.\"
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				.\" $FreeBSD$
				.\"
				.Dd March 15, 2020
				.Dt pchtherm 4
				.Os
				.Sh NAME
				.Nm pchtherm
				.Nd Intel PCH thermal subsystem
				.Sh SYNOPSIS
				.Cd "device pci"
				.Cd "device pchtherm"
				.Sh DESCRIPTION
				The
				.Nm
				driver provides access to sensor data and configuration
				installed in Intel PCH chipset.
				.Nm
				configuration register.
				.Pp
				The access to
				.Nm
				data is made via the
				.Xr sysctl 8
				interface:
				.Bd -literal
				dev.pchtherm.0.ctt: 115.0C
				dev.pchtherm.0.templature: 40.0C
				driesmUnsubmitted Not Done Inline Actions templature/s/temperature driesm: templature/s/temperature
				dev.pchtherm.0.t2temp: 91.0C
				dev.pchtherm.0.t1temp: 86.0C
				dev.pchtherm.0.t0temp: 81.0C
				dev.pchtherm.0.tahv: 83.0C
				dev.pchtherm.0.talv: 30.0C
				dev.pchtherm.0.pmtime: 32
				dev.pchtherm.0.pmtemp: 50.0C
				dev.pchtherm.0.%parent: pci0
				dev.pchtherm.0.%pnpinfo: vendor=0x8086 device=0x9d31 subvendor=0x17aa subdevice=0x2256 class=0x118000
				dev.pchtherm.0.%location: slot=20 function=2 dbsf=pci0:0:20:2
				dev.pchtherm.0.%driver: pchtherm
				dev.pchtherm.0.%desc: Skylake PCH Thermal Subsystem
				dev.pchtherm.%parent:
				.Ed
				.Bl -tag -width ".Va dev.pchtherm.%d.pch_hot_level"
				.It Va dev.pchtherm.%d.temperature
				Is the read-only value of the current temperature read by the sensor.
				.It Va dev.pchtherm.%d.ctt
				When temperature reached this value, system will shutdown. This will not appear when this feature is disabled and locked down.
				.It Va dev.pchtherm.%d.t0temp
				danfeUnsubmitted Not Done Inline Actions When reached ... will shutdown — sequence of tenses seems wrong here, suggest getting advice from a native speaker. Also, each sentence should start on a new line (after period). danfe: When //reached// ... //will shutdown// — sequence of tenses seems wrong here, suggest getting…
				When temperature is under this value, system will be in T0 state.
				.It Va dev.pchtherm.%d.t1temp
				When temperature is over t0temp andunder this value, system will be in T1 state.
				.It Va dev.pchtherm.%d.t2temp
				danfeUnsubmitted Not Done Inline Actions Should it be spelled as `.Va t0temp`? danfe: Should it be spelled as `.Va t0temp`?
				When temperature is over t1temp andunder this value, system will be in T2 state.
				Over this value, system will be in T3 state.
				val_packett.coolUnsubmitted Not Done Inline Actions missing space "andunder" val_packett.cool: missing space "andunder"
				danfeUnsubmitted Not Done Inline Actions Should it be spelled as `.Va t1temp`? danfe: Should it be spelled as `.Va t1temp`?
				.It Va dev.pchtherm.%d.talv
				Lower alart value. This will not appear when sensor enable bit is locked down and the value is zero(which will show -50.0C).
				.It Va dev.pchtherm.%d.tahv
				danfeUnsubmitted Not Done Inline Actions Missing newline after dot (end of sentence) and space before opening parenthesis. danfe: Missing newline after dot (end of sentence) and space before opening parenthesis.
				High alart value. This will not appear when sensor enable bit is locked down and the value is zero(which will show -50.0C).
				.It Va dev.pchtherm.%d.pmtemp
				danfeUnsubmitted Not Done Inline Actions Missing newline after dot (end of sentence) and space before opening parenthesis. danfe: Missing newline after dot (end of sentence) and space before opening parenthesis.
				Sensor Power management temperature. Under this temperature, sensor will idle during pmtime.
				.It Va dev.pchtherm.%d.pmtime
				danfeUnsubmitted Not Done Inline Actions Sentence break => new line; should it be spelled as `.Va pmtime` (as this is a reference to adjacent variable)? danfe: Sentence break => new line; should it be spelled as `.Va pmtime` (as this is a reference to…
				Sensor idle duration when low temperature.
				.It Va dev.pchtherm.%d.pch_hot_level
				When temperature is higher than this value, PCHHOT# pin will assert. This value is not appear when this feature is disabled and locked down.
				.El
				.Pp
				Please check the PCH datasheets for more details.
				.Pp
				.Sh CAVEAT
				All values are read only and not support event interrupt for now.
				.Sh SEE ALSO
				danfeUnsubmitted Not Done Inline Actions Perhaps should be: read-only, do not support... danfe: Perhaps should be: //read-only//, //do not// support...
				.Xr sysctl 8
				.Sh HISTORY
				The
				.Nm
				driver first appeared in
				.Fx 13.0 .
				.Sh AUTHORS
				.An -nosplit
				The
				.Nm
				driver and this manual page were written by
				.An Takanori Waanabe Aq Mt takawata@FreeBSD.org .
				danfeUnsubmitted Not Done Inline Actions I think you've also spelled your name wrong. :-) danfe: I think you've also spelled your name wrong. :-)