N900 light meter
The light meter lets the software on the N900 sense ambient light levels.
The device is a TAOS TSL2563.
It is handled by the kernel module tsl2563.
The kernel driver exposes the lux value in the sysfs file
cat /sys/class/i2c-adapter/i2c-2/2-0029/lux 21
Under MeeGo it's available as
The sensor is also used to modulate the backlight in response to ambient light, although this behaviour can be disabled.
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