2010-10-02 13:18:57 +04:00
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.\" $NetBSD: g760a.4,v 1.2 2010/10/02 09:18:57 wiz Exp $
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2010-10-02 10:22:00 +04:00
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.\"
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.\" Copyright (c) 2008 A.Leo.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed for the
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.\" NetBSD Project. See http://www.NetBSD.org/ for
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.\" information about NetBSD.
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.\" 4. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd April 11, 2008
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.Dt G760A 4
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.Os
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.Sh NAME
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.Nm g760a
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.Nd Global Mixed-mode Technology Inc. G760a fan speed controller driver
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.Sh SYNOPSIS
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.Cd g760a0 at iic? addr 0x3e
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the
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2010-10-02 13:18:57 +04:00
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.Tn Global Mixed-mode Technology Inc.
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2010-10-02 10:22:00 +04:00
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G760a on iicbus fan speed controller to be used with the
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.Xr envsys 4
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2010-10-02 13:18:57 +04:00
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API.
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This chip could be found in
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2010-10-02 10:22:00 +04:00
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.Tn D-Link's DNS-323 NAS box.
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.Pp
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The following
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.Xr sysctl 8
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2010-10-02 13:18:57 +04:00
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variable controls the fan's speed:
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2010-10-02 10:22:00 +04:00
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.Bl -tag
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.It Dv machdep.g760a0.rpm
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This value specifies the desired speed for the fan.
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Valid range is 2000..20000 or 0 (the fan is turned off).
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The default value is 0.
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.Pp
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When setting the desired speed the RPM number will be converted
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2010-10-02 13:18:57 +04:00
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to the internal represenation and truncated.
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For example when you are setting 2000 it will be truncated to 2006,
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and 8000 will be changed to 8057.
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2010-10-02 10:22:00 +04:00
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.El
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.Sh SEE ALSO
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.Xr envsys 4 ,
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.Xr lm 4 ,
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.Xr envstat 8
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2010-10-02 10:22:00 +04:00
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.Sh AUTHORS
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The
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.Nm
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2010-10-02 13:18:57 +04:00
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driver was written by
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.An A. Leo .
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