ISL(4) BSD Kernel Interfaces Manual ISL(4)
NAME
isl — Intersil(TM) I2C ISL29018 sensor driver
SYNOPSIS
To compile this driver into the kernel, place the following lines into the kernel configuration file:
device isl
device ig4
device smbus
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
isl_load="YES"
ig4_load="YES"
DESCRIPTION
The isl driver provides access to sensor data provided by the Intersil(TM) I2C ISL29018 Digital Ambient Light Sensor and Proximity Sensor with Interrupt Function. Functionality is basic and provided through the sysctl(8) interface.
SYSCTL VARIABLES
The following sysctl(8) variables are available:
dev.isl.X.als
Current ALS (Ambient Light Sensor) readout.
dev.isl.X.ir
Current IR (InfraRed) sensor readout.
dev.isl.X.prox
Current proximity sensor readout.
dev.isl.X.resolution
Current sensor resolution.
dev.isl.X.range
Current sensor range.
EXAMPLES
Ambient light sensor read out
$ sysctl dev.isl.0.als
dev.isl.0.als: 64
Automatically adjust brightness
This requires the port graphics/intel-backlight and only works with laptops using a supported Intel(R) GPU.
$ pkg install intel-backlight
$ sh /usr/local/share/examples/intel-backlight/isl_backlight.sh
SEE ALSO
AUTHORS
The isl driver was written by Michael Gmelin 〈freebsd AT grem DOT de〉.
This manual page was written by Michael Gmelin 〈freebsd AT grem DOT de〉.
BUGS
The isl driver detects the device based on its I2C address (0x44). This might have unforeseen consequences if the initialization sequence is sent to an unknown device at that address.
BSD July 25, 2015 BSD