Light sensor on XO-1.75

Sascha Silbe sascha-ml-reply-to-2011-3 at
Fri Sep 2 08:52:38 EDT 2011

Excerpts from Paul Fox's message of Tue Aug 30 16:38:13 +0200 2011:

> yes, it's a nice trick.  i think it was discussed on this list last year.
> it's not very sensitive, but it can tell us the difference between full
> sun and not, which is really when we'd want to turn off the backlight.

Given that turning off the backlight usually isn't time critical, how
about triggering a measurement cycle only when user space actually reads
from the sysfs file? That would disturb regular operation of the nearby
LED only occasionally.


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