Light sensor on XO-1.75

[Paul Fox]

sascha wrote:
 > 
 > > 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.

yeah, we'll figure out something like that.  work in progress.

paul
=---------------------
 paul fox, pgf at laptop.org