1.\" Copyright (c) 2015 Michael Gmelin <freebsd@grem.de> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd May 30, 2015 28.Dt IG4 4 29.Os 30.Sh NAME 31.Nm ig4 32.Nd Intel(R) fourth generation mobile CPU integrated I2C SMBus driver 33.Sh SYNOPSIS 34To compile this driver into the kernel, place the following lines into 35the kernel configuration file: 36.Bd -ragged -offset indent 37.Cd "device ig4" 38.Cd "device smbus" 39.Ed 40.Pp 41Alternatively, to load the driver as a module at boot time, place the following line in 42.Xr loader.conf 5 : 43.Bd -literal -offset indent 44ig4_load="YES" 45.Ed 46.Sh DESCRIPTION 47The 48.Nm 49driver provides access to peripherals attached to an I2C SMB controller. 50.Nm 51supports the SMBus controller found in fourth generation Intel(R) Core(TM) 52processors based on the mobile U-processor line for intelligent systems. 53This includes the i7-4650U, i5-4300U, i3-4010U, and 2980U. 54.Sh SYSCTL VARIABLES 55These 56.Xr sysctl 8 57variables are available: 58.Bl -tag -width "debug.ig4_dump" 59.It Va debug.ig4_dump 60Setting this to a non-zero value dumps controller registers to console and 61syslog once. 62The sysctl resets to zero immediately. 63.El 64.Sh SEE ALSO 65.Xr smb 4 , 66.Xr smbus 4 67.Sh AUTHORS 68.An -nosplit 69The 70.Nm 71driver was written for DragonFly BSD by 72.An Matthew Dillon 73and subsequently ported to 74.Fx 75by 76.An Michael Gmelin Aq Mt freebsd@grem.de . 77.Pp 78This manual page was written by 79.An Michael Gmelin Aq Mt freebsd@grem.de . 80