git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 3cdbbeeb DM |
1 | Kernel driver isl29003 |
| 2 | ===================== | |
| 3 | ||
| 4 | Supported chips: | |
| 5 | * Intersil ISL29003 | |
| 6 | Prefix: 'isl29003' | |
| 7 | Addresses scanned: none | |
| 8 | Datasheet: | |
| 9 | http://www.intersil.com/data/fn/fn7464.pdf | |
| 10 | ||
| 11 | Author: Daniel Mack <daniel@caiaq.de> | |
| 12 | ||
| 13 | ||
| 14 | Description | |
| 15 | ----------- | |
| 16 | The ISL29003 is an integrated light sensor with a 16-bit integrating type | |
| 17 | ADC, I2C user programmable lux range select for optimized counts/lux, and | |
| 18 | I2C multi-function control and monitoring capabilities. The internal ADC | |
| 19 | provides 16-bit resolution while rejecting 50Hz and 60Hz flicker caused by | |
| 20 | artificial light sources. | |
| 21 | ||
| 22 | The driver allows to set the lux range, the bit resolution, the operational | |
| 23 | mode (see below) and the power state of device and can read the current lux | |
| 24 | value, of course. | |
| 25 | ||
| 26 | ||
| 27 | Detection | |
| 28 | --------- | |
| 29 | ||
| 30 | The ISL29003 does not have an ID register which could be used to identify | |
| 31 | it, so the detection routine will just try to read from the configured I2C | |
| 32 | addess and consider the device to be present as soon as it ACKs the | |
| 33 | transfer. | |
| 34 | ||
| 35 | ||
| 36 | Sysfs entries | |
| 37 | ------------- | |
| 38 | ||
| 39 | range: | |
| 40 | 0: 0 lux to 1000 lux (default) | |
| 41 | 1: 0 lux to 4000 lux | |
| 42 | 2: 0 lux to 16,000 lux | |
| 43 | 3: 0 lux to 64,000 lux | |
| 44 | ||
| 45 | resolution: | |
| 46 | 0: 2^16 cycles (default) | |
| 47 | 1: 2^12 cycles | |
| 48 | 2: 2^8 cycles | |
| 49 | 3: 2^4 cycles | |
| 50 | ||
| 51 | mode: | |
| 52 | 0: diode1's current (unsigned 16bit) (default) | |
| 53 | 1: diode1's current (unsigned 16bit) | |
| 54 | 2: difference between diodes (l1 - l2, signed 15bit) | |
| 55 | ||
| 56 | power_state: | |
| 57 | 0: device is disabled (default) | |
| 58 | 1: device is enabled | |
| 59 | ||
| 60 | lux (read only): | |
| 61 | returns the value from the last sensor reading | |
| 62 |