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Intersil(TM) I2C ISL29018 sensor driver.

October 03, 2016
ISL(4) BSD Kernel Interfaces Manual ISL(4)


isl — Intersil(TM) I2C ISL29018 sensor driver


To compile this driver into the kernel, place the following lines into the kernel configura‐ tion 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:"iicbus0" hint.isl.0.addr="0x88""iicbus1" hint.isl.1.addr="0x88"


The isl driver provides access to sensor data provided by the Intersil(TM) I2C ISL29018 Dig‐ ital 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: target iicbus(4). hint.isl.%d.addr isl i2c address on the iicbus(4).


The following sysctl(8) variables are available: dev.isl.X.als Current ALS (Ambient Light Sensor) readout. 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.


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 sup‐ ported Intel(R) GPU. $ pkg install intel-backlight $ sh /usr/local/share/examples/intel-backlight/


ig4(4), iicbus(4)


The isl driver was written by Michael Gmelin <>. This manual page was written by Michael Gmelin <>.


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.
BSD October 03, 2016 BSD
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isl(4freebsd) referred by chromebook_platform(4freebsd)
refer to ig4(4freebsd) | iicbus(4freebsd) | sysctl(8)
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