isl4
Intersil(tm) i2c isl29018 sensor driver
Usage
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"
On many Chromebook models this driver can be automatically configured with the help of the chromebook_platform(4) driver. Alternatively, the
isl driver can be manually configured in /boot/device.hints: hint.isl.0.at="iicbus0" hint.isl.0.addr="0x88" hint.isl.1.at="iicbus1" hint.isl.1.addr="0x88"
Overview
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:
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
Releases
25 releases since FreeBSD 11.0-RELEASE; the text changed 11 times.