3-color led too bright

3-color led too bright

[Pavel Machek]

Hi!

The indicator 3-color LED in mainline kernel seem to be a bit too
bright. .. more bright to look at comfortably. I believe it is also
brighter than in original maemo... I believe I've seen note somewhere
that hardware may allow too much current to the 3-color led damaging
hardware... but I can't find the link now.

Does anyone know more?

Thanks,
									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

3-color led too bright

[Sebastian Reichel]

Hi Pavel,

On Sat, Jan 30, 2016 at 09:07:50PM +0100, Pavel Machek wrote:
> The indicator 3-color LED in mainline kernel seem to be a bit too
> bright. .. more bright to look at comfortably. I believe it is also
> brighter than in original maemo... I believe I've seen note somewhere
> that hardware may allow too much current to the 3-color led damaging
> hardware... but I can't find the link now.

Safe current limits for the leds are configured in the DTS
(led-cur and max-cur) and can be checked in sysfs. I remember
testing the safety limits when I added them to DT, but the
driver has changed a bit since then.

-- Sebastian
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