Hi! > >> Generally I came to a conclusion that it will be best to register > >> additional LED RGB class device in an addition to three LED class > >> devices representing each color. In order to avoid hard to solve > >> locking problems I propose to allow for simultaneous access to LED > >> class devices and LED RGB class device gathering them. > >> > >> All in all, currently we also don't give an exclusive access to > >> a particular LED class device, which always can lead to overwriting > >> current brightness by another process. These issues must be arbitrated > >> by user space. > >> > >> I propose that LED RGB class device exposed following files: > >> > >> - red_brightness > >> - green_brightness > >> - blue_brightness > >> - latch_color > > > > Actually, I'd just do single file, "rgb_brightness" with 3 > > values. Overhead of writing 3 values is pretty much 0. > > You've always been strongly in favor of one-value-per-file > sysfs rule of thumb, but I'm OK with this approach as well :-) Being values of same type (etc), this is actually permitted. And it is better than hack with latch_color :-). Good. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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