.\"	$NetBSD: viaenv.4,v 1.7 2007/01/21 22:14:53 wiz Exp $
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.\" Copyright (c) 2000 Johan Danielsson
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.Dd January 20, 2007
.Dt VIAENV 4
.Os
.Sh NAME
.Nm viaenv
.Nd VIA VT82C686A/VT8231 Hardware Monitor and Power Management Timer
.Sh SYNOPSIS
.Cd "viaenv* at pci? dev ? function ?"
.Sh DESCRIPTION
The
.Nm
is an
.Xr envsys 4
compatible driver for the Hardware Monitor and the Power Management
timer in the
.Tn VIA
VT82C686A and VT8231 South Bridges.
.Pp
The device has 10 sensors:
.Bl -column "Sensor" "Units" "Typical" -offset indent
.It Sy "Sensor" Ta Sy "Units" Ta Sy "Typical Use"
.It Li "TSENS1" Ta "uK" Ta "CPU temperature"
.It Li "TSENS2" Ta "uK" Ta "System temperature"
.It Li "TSENS3" Ta "uK" Ta "?"
.It Li "FAN1" Ta "RPM" Ta "CPU fan"
.It Li "FAN2" Ta "RPM" Ta "System fan"
.It Li "VSENS1" Ta "uV DC" Ta "CPU core voltage (2.0V)"
.It Li "VSENS2" Ta "uV DC" Ta "North Bridge core voltage (2.5V)"
.It Li "Vcore" Ta "uV DC" Ta "Internal core voltage (3.3V)"
.It Li "VSENS3" Ta "uV DC" Ta "+5V"
.It Li "VSENS4" Ta "uV DC" Ta "+12V"
.El
.Pp
Sensor data is updated every 1.5 seconds.
.Sh SEE ALSO
.Xr envsys 4 ,
.Xr envstat 8
.Sh HISTORY
The
.Nm
device appeared in
.Nx 1.5 .
.Sh BUGS
Interrupt support is unimplemented, as is support for setting values.