ca2e4ecd73
Differential Revision: https://reviews.freebsd.org/D2811 Reviewed by: adrian, wblock Approved by: adrian, wblock Relnotes: yes
105 lines
3.2 KiB
Groff
105 lines
3.2 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 July 25, 2015
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.Dt ISL 4
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.Os
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.Sh NAME
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.Nm isl
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.Nd Intersil(TM) I2C ISL29018 sensor 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 isl"
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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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isl_load="YES"
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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 sensor data provided by the Intersil(TM) I2C
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ISL29018 Digital Ambient Light Sensor and Proximity Sensor with Interrupt
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Function.
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Functionality is basic and provided through the
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.Xr sysctl 8
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interface.
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.Sh SYSCTL VARIABLES
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The following
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.Xr sysctl 8
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variables are available:
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.Bl -tag -width "dev.isl.X.resolution"
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.It Va dev.isl.X.als
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Current ALS (Ambient Light Sensor) readout.
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.It Va dev.isl.X.ir
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Current IR (InfraRed) sensor readout.
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.It Va dev.isl.X.prox
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Current proximity sensor readout.
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.It Va dev.isl.X.resolution
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Current sensor resolution.
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.It Va dev.isl.X.range
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Current sensor range.
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.El
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.Sh EXAMPLES
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.Ss Ambient light sensor read out
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.Bd -literal
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$ sysctl dev.isl.0.als
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dev.isl.0.als: 64
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.Ed
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.Ss Automatically adjust brightness
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This requires the port
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.Pa graphics/intel-backlight
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and only works with laptops using a supported Intel(R) GPU.
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.Bd -literal
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$ pkg install intel-backlight
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$ sh /usr/local/share/examples/intel-backlight/isl_backlight.sh
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.Ed
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.Sh SEE ALSO
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.Xr ig4 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 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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.Sh BUGS
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The
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.Nm
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driver detects the device based on its I2C address (0x44).
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This might have unforeseen consequences if the initialization sequence
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is sent to an unknown device at that address.
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