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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 iicbus
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"
In /boot/device.hints:
hint.isl.0.at="iicbus0"
hint.isl.0.addr="0x88"
hint.isl.1.at="iicbus1"
hint.isl.1.addr="0x88"
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.
On a system using device.hints(5), these values are configurable for isl:
hint.isl.%d.at target iicbus(4).
hint.isl.%d.addr isl i2c address on the iicbus(4).
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
ig4(4), iicbus(4)
AUTHORS
The isl driver was written by Michael Gmelin <freebsd@grem.de>. This manual page was written by Michael Gmelin <freebsd@grem.de>.
BUGS
The isl driver detects the device based from the I2C address. This might have unforeseen consequences if
the initialization sequence is sent to an unknown device at that address.