.\"	$OpenBSD: ecadc.4,v 1.2 2007/10/21 09:33:39 jmc Exp $
.\"
.\" Copyright (c) 2006 Damien Miller <djm@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: October 21 2007 $
.Dt ECADC 4 sparc64
.Os
.Sh NAME
.Nm ecadc
.Nd Environmental Monitoring Subsystem temperature sensor
.Sh SYNOPSIS
.Cd "ecadc* at iic?"
.Sh DESCRIPTION
The
.Nm
driver supports the PCF8591 I2C Analogue to Digital Converter that is
part of the environmental monitoring subsystem found on the Sun
Enterprise 250 and Sun Enterprise 450 systems.
The temperature readings are made available through the
.Xr sysctl 8
interface.
.Pp
The driver reads up to four A/D lines configured as temperature inputs.
Sensor names, type and calibration information are read from OpenFirmware.
.Sh SEE ALSO
.Xr iic 4 ,
.Xr intro 4 ,
.Xr pcfadc 8 ,
.Xr sensorsd 8 ,
.Xr sysctl 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 4.3 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Mark Kettenis Aq kettenis@openbsd.org
based on the
.Xr pcfadc 4
driver written by
.An Damien Miller Aq djm@openbsd.org .