70 lines
2.5 KiB
Groff
70 lines
2.5 KiB
Groff
.\" $NetBSD: tda.4,v 1.3 2013/03/14 19:18:32 njoly Exp $
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.\"
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.\" Copyright (c) 2013 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Julian Coleman
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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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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd February 2, 2013
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.Dt TDA 4 sparc64
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.Os
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.Sh NAME
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.Nm tda
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.Nd TDA8444 fan speed controller
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.Sh SYNOPSIS
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.Cd "tda0 at iic1 addr 0x24: fan-control"
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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 TDA8444 DAC used to control the fan speeds
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in Sun Blade 1000 and Blade 2000 systems.
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The speed of the CPU fan and of the system fan are automatically adjusted
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every 60 seconds, based on the currently reported CPU and system
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temperatures, respectively.
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.Pp
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The speed-related values are made available through the
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.Xr envstat 8
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interface.
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The range of the values are:
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.Bl -column -offset indent ".Sy System temperature" ".Sy Minimum" ".Sy Maximum"
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.It Sy Ta Sy Minimum Ta Sy Maximum
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.It Li CPU temperature Ta <=57 Ta >=67
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.It Li System temperature Ta <=20 Ta >=30
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.It Li Speed value Ta 12 Ta 63
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.El
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.Sh SEE ALSO
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.Xr admtemp 4 ,
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.Xr envstat 8
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.Sh BUGS
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The temperatures are reported as
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.Sq internal
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and
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.Sq external
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instead of
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.Sq system
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and
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.Sq CPU ,
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respectively.
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