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 July 25, 2015 28.Dt ISL 4 29.Os 30.Sh NAME 31.Nm isl 32.Nd Intersil(TM) I2C ISL29018 sensor 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 isl" 38.Cd "device ig4" 39.Cd "device smbus" 40.Ed 41.Pp 42Alternatively, to load the driver as a module at boot time, place the following line in 43.Xr loader.conf 5 : 44.Bd -literal -offset indent 45isl_load="YES" 46ig4_load="YES" 47.Ed 48.Sh DESCRIPTION 49The 50.Nm 51driver provides access to sensor data provided by the Intersil(TM) I2C 52ISL29018 Digital Ambient Light Sensor and Proximity Sensor with Interrupt 53Function. 54Functionality is basic and provided through the 55.Xr sysctl 8 56interface. 57.Sh SYSCTL VARIABLES 58The following 59.Xr sysctl 8 60variables are available: 61.Bl -tag -width "dev.isl.X.resolution" 62.It Va dev.isl.X.als 63Current ALS (Ambient Light Sensor) readout. 64.It Va dev.isl.X.ir 65Current IR (InfraRed) sensor readout. 66.It Va dev.isl.X.prox 67Current proximity sensor readout. 68.It Va dev.isl.X.resolution 69Current sensor resolution. 70.It Va dev.isl.X.range 71Current sensor range. 72.El 73.Sh EXAMPLES 74.Ss Ambient light sensor read out 75.Bd -literal 76$ sysctl dev.isl.0.als 77dev.isl.0.als: 64 78.Ed 79.Ss Automatically adjust brightness 80This requires the port 81.Pa graphics/intel-backlight 82and only works with laptops using a supported Intel(R) GPU. 83.Bd -literal 84$ pkg install intel-backlight 85$ sh /usr/local/share/examples/intel-backlight/isl_backlight.sh 86.Ed 87.Sh SEE ALSO 88.Xr ig4 4 , 89.Xr smbus 4 90.Sh AUTHORS 91.An -nosplit 92The 93.Nm 94driver was written by 95.An Michael Gmelin Aq Mt freebsd@grem.de . 96.Pp 97This manual page was written by 98.An Michael Gmelin Aq Mt freebsd@grem.de . 99.Sh BUGS 100The 101.Nm 102driver detects the device based on its I2C address (0x44). 103This might have unforeseen consequences if the initialization sequence 104is sent to an unknown device at that address. 105