Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1322499 > unrolled thread

3-color led too bright

Back to article view | Back to linux.kernel

Contents

  3-color led too bright Pavel Machek <pavel@ucw.cz> - 2016-01-30 21:10 +0100
    Re: 3-color led too bright Sebastian Reichel <sre@kernel.org> - 2016-01-31 01:30 +0100

#1322499 — 3-color led too bright

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

[toc] | [next] | [standalone]

#1322528

[Multipart message — attachments visible in raw view] — view raw

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

[toc] | [prev] | [standalone]

Back to top | Article view | linux.kernel

csiph-web