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.\" $NetBSD: g760a.4,v 1.2 2010/10/02 09:18:57 wiz Exp $
.\"
.\" Copyright (c) 2008 A.Leo.
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.Dd April 11, 2008
.Dt G760A 4
.Os
.Sh NAME
.Nm g760a
.Nd Global Mixed-mode Technology Inc. G760a fan speed controller driver
.Sh SYNOPSIS
.Cd g760a0 at iic? addr 0x3e
.Sh DESCRIPTION
The
.Nm
driver provides support for the
.Tn Global Mixed-mode Technology Inc.
G760a on iicbus fan speed controller to be used with the
.Xr envsys 4
API.
This chip could be found in
.Tn D-Link's DNS-323 NAS box.
.Pp
The following
.Xr sysctl 8
variable controls the fan's speed:
.Bl -tag
.It Dv machdep.g760a0.rpm
This value specifies the desired speed for the fan.
Valid range is 2000..20000 or 0 (the fan is turned off).
The default value is 0.
.Pp
When setting the desired speed the RPM number will be converted
to the internal represenation and truncated.
For example when you are setting 2000 it will be truncated to 2006,
and 8000 will be changed to 8057.
.El
.Sh SEE ALSO
.Xr envsys 4 ,
.Xr lm 4 ,
.Xr envstat 8
.Sh AUTHORS
The
.Nm
driver was written by
.An A. Leo .