1.\" $NetBSD: g760a.4,v 1.4 2024/09/07 19:13:27 rillig Exp $ 2.\" 3.\" Copyright (c) 2008 A.Leo. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed for the 17.\" NetBSD Project. See https://www.NetBSD.org/ for 18.\" information about NetBSD. 19.\" 4. The name of the author may not be used to endorse or promote products 20.\" derived from this software without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32.\" 33.Dd April 11, 2008 34.Dt G760A 4 35.Os 36.Sh NAME 37.Nm g760a 38.Nd Global Mixed-mode Technology Inc. G760a fan speed controller driver 39.Sh SYNOPSIS 40.Cd g760a0 at iic? addr 0x3e 41.Sh DESCRIPTION 42The 43.Nm 44driver provides support for the 45.Tn Global Mixed-mode Technology Inc. 46G760a on iicbus fan speed controller to be used with the 47.Xr envsys 4 48API. 49This chip could be found in 50.Tn D-Link's DNS-323 NAS box. 51.Pp 52The following 53.Xr sysctl 8 54variable controls the fan's speed: 55.Bl -tag 56.It Dv machdep.g760a0.rpm 57This value specifies the desired speed for the fan. 58Valid range is 2000..20000 or 0 (the fan is turned off). 59The default value is 0. 60.Pp 61When setting the desired speed the RPM number will be converted 62to the internal representation and truncated. 63For example when you are setting 2000 it will be truncated to 2006, 64and 8000 will be changed to 8057. 65.El 66.Sh SEE ALSO 67.Xr envsys 4 , 68.Xr lm 4 , 69.Xr envstat 8 70.Sh AUTHORS 71The 72.Nm 73driver was written by 74.An A. Leo . 75