1.\" $NetBSD: tda.4,v 1.3 2013/03/14 19:18:32 njoly Exp $ 2.\" 3.\" Copyright (c) 2013 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Julian Coleman 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd February 2, 2013 31.Dt TDA 4 sparc64 32.Os 33.Sh NAME 34.Nm tda 35.Nd TDA8444 fan speed controller 36.Sh SYNOPSIS 37.Cd "tda0 at iic1 addr 0x24: fan-control" 38.Sh DESCRIPTION 39The 40.Nm 41driver provides support for the TDA8444 DAC used to control the fan speeds 42in Sun Blade 1000 and Blade 2000 systems. 43The speed of the CPU fan and of the system fan are automatically adjusted 44every 60 seconds, based on the currently reported CPU and system 45temperatures, respectively. 46.Pp 47The speed-related values are made available through the 48.Xr envstat 8 49interface. 50The range of the values are: 51.Bl -column -offset indent ".Sy System temperature" ".Sy Minimum" ".Sy Maximum" 52.It Sy Ta Sy Minimum Ta Sy Maximum 53.It Li CPU temperature Ta <=57 Ta >=67 54.It Li System temperature Ta <=20 Ta >=30 55.It Li Speed value Ta 12 Ta 63 56.El 57.Sh SEE ALSO 58.Xr admtemp 4 , 59.Xr envstat 8 60.Sh BUGS 61The temperatures are reported as 62.Sq internal 63and 64.Sq external 65instead of 66.Sq system 67and 68.Sq CPU , 69respectively. 70