.\"	$NetBSD: envctrl.4,v 1.5 2014/03/18 18:20:40 riastradh Exp $
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.Dd April 14, 2007
.Dt ENVCTRL 4 sparc64
.Os
.Sh NAME
.Nm envctrl
.Nd
.Tn Sun
Ultra Enterprise 450 environmental monitoring
.Sh SYNOPSIS
.Cd "envctrl*	at ebus?"
.Sh DESCRIPTION
The
.Nm
driver provides thermal monitoring of processors and power supplies, as well as
automatic fan regulation. The driver attaches to the SUNW,envctrl subsystem
found on Ultra Enterprise 450 systems.
.Pp
The following sensors can be queried with
.Xr envstat 8 :
.Bl -column "xxxxxxxxxxxxx" "Unit" "Description" -offset indent
.It Sy "Sensor" Ta Sy "Units" Ta Sy "Description"
.It Li "CPU0" Ta "degC" Ta "Processor 0 temperature"
.It Li "CPU1" Ta "degC" Ta "Processor 1 temperature"
.It Li "CPU2" Ta "degC" Ta "Processor 2 temperature"
.It Li "CPU3" Ta "degC" Ta "Processor 3 temperature"
.It Li "PS0" Ta "degC" Ta "Power supply 0 temperature"
.It Li "PS1" Ta "degC" Ta "Power supply 1 temperature"
.It Li "PS2" Ta "degC" Ta "Power supply 2 temperature"
.It Li "ambient" Ta "degC" Ta "Ambient temperature"
.It Li "cpufan voltage" Ta "V" Ta "Voltage used to drive processor fans"
.It Li "psfan voltage" Ta "V" Ta "Voltage used to drive power supply fans"
.It Li "ps failed" Ta "count" Ta "number of failed power supplies"
.It Li "fans failed" Ta "count" Ta "number of failed fans"
.El
.Sh SEE ALSO
.Xr envsys 4 ,
.Xr envstat 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Nx 5.0 .
.Sh AUTHORS
.An Tobias Nygren Aq Mt tnn@NetBSD.org
.Sh BUGS
The driver doesn't support SUNW,envctrltwo found on the Ultra Enterprise 250.
.Pp
Environmental interrupts are not supported.