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.\" $OpenBSD: pcfadc.4,v 1.5 2007/05/31 19:19:51 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: May 31 2007 $
.Dt PCFADC 4
.Os
.Sh NAME
.Nm pcfadc
.Nd Philips PCF8591 temperature sensor
.Sh SYNOPSIS
.Cd "pcfadc* at iic?"
.Sh DESCRIPTION
The
.Nm
driver supports the PCF8591 I2C Analogue to Digital Converter, making
its readings available through a
.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 sensorsd 8 ,
.Xr sysctl 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 3.9 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Damien Miller Aq djm@openbsd.org .
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