551209395d
Differential Revision: https://reviews.freebsd.org/D2372 Reviewed by: jhb, wblock, adrian Approved by: jhb, wblock Relnotes: yes
80 lines
2.7 KiB
Groff
80 lines
2.7 KiB
Groff
.\" Copyright (c) 2015 Michael Gmelin <freebsd@grem.de>
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.\" All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd May 30, 2015
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.Dt IG4 4
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.Os
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.Sh NAME
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.Nm ig4
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.Nd Intel(R) fourth generation mobile CPU integrated I2C SMBus driver
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.Sh SYNOPSIS
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To compile this driver into the kernel, place the following lines into
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the kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device ig4"
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.Cd "device smbus"
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.Ed
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.Pp
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Alternatively, to load the driver as a module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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ig4_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver provides access to peripherals attached to an I2C SMB controller.
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.Nm
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supports the SMBus controller found in fourth generation Intel(R) Core(TM)
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processors based on the mobile U-processor line for intelligent systems.
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This includes the i7-4650U, i5-4300U, i3-4010U, and 2980U.
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.Sh SYSCTL VARIABLES
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These
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.Xr sysctl 8
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variables are available:
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.Bl -tag -width "debug.ig4_dump"
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.It Va debug.ig4_dump
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Setting this to a non-zero value dumps controller registers to console and
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syslog once.
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The sysctl resets to zero immediately.
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.El
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.Sh SEE ALSO
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.Xr smb 4 ,
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.Xr smbus 4
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written for DragonFly BSD by
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.An Matthew Dillon
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and subsequently ported to
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.Fx
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by
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.An Michael Gmelin Aq Mt freebsd@grem.de .
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.Pp
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This manual page was written by
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.An Michael Gmelin Aq Mt freebsd@grem.de .
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