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ISL(4) FreeBSD 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 Inter- sil(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 lap- tops using a supported Intel(R) GPU. $ pkg install intel-backlight $ sh /usr/local/share/examples/intel-backlight/isl_backlight.sh SEE ALSO ig4(4), smbus(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 on its I2C address (0x44). This might have unforeseen consequences if the initialization sequence is sent to an unknown device at that address. FreeBSD 11.1 July 25, 2015 FreeBSD 11.1
NAME | SYNOPSIS | DESCRIPTION | SYSCTL VARIABLES | EXAMPLES | SEE ALSO | AUTHORS | BUGS
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