3cdbbeebb7
Add a driver for Intersil's ISL29003 ambient light sensor device plus some documentation. Inspired by tsl2550.c, a driver for a similar device. It is put in drivers/misc for now until the industrial I/O framework gets merged. Signed-off-by: Daniel Mack <daniel@caiaq.de> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
62 lines
1.5 KiB
Text
62 lines
1.5 KiB
Text
Kernel driver isl29003
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=====================
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Supported chips:
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* Intersil ISL29003
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Prefix: 'isl29003'
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Addresses scanned: none
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Datasheet:
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http://www.intersil.com/data/fn/fn7464.pdf
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Author: Daniel Mack <daniel@caiaq.de>
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Description
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-----------
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The ISL29003 is an integrated light sensor with a 16-bit integrating type
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ADC, I2C user programmable lux range select for optimized counts/lux, and
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I2C multi-function control and monitoring capabilities. The internal ADC
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provides 16-bit resolution while rejecting 50Hz and 60Hz flicker caused by
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artificial light sources.
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The driver allows to set the lux range, the bit resolution, the operational
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mode (see below) and the power state of device and can read the current lux
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value, of course.
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Detection
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---------
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The ISL29003 does not have an ID register which could be used to identify
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it, so the detection routine will just try to read from the configured I2C
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addess and consider the device to be present as soon as it ACKs the
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transfer.
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Sysfs entries
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-------------
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range:
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0: 0 lux to 1000 lux (default)
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1: 0 lux to 4000 lux
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2: 0 lux to 16,000 lux
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3: 0 lux to 64,000 lux
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resolution:
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0: 2^16 cycles (default)
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1: 2^12 cycles
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2: 2^8 cycles
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3: 2^4 cycles
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mode:
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0: diode1's current (unsigned 16bit) (default)
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1: diode1's current (unsigned 16bit)
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2: difference between diodes (l1 - l2, signed 15bit)
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power_state:
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0: device is disabled (default)
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1: device is enabled
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lux (read only):
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returns the value from the last sensor reading
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