* Re: LED backlight on Droid 4 and others
[not found] ` <20200105202449.GC5885@atomide.com>
@ 2020-01-05 23:55 ` Pavel Machek
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From: Pavel Machek @ 2020-01-05 23:55 UTC (permalink / raw)
To: Tony Lindgren, linux-leds
Cc: kernel list, linux-arm-kernel, linux-omap, sre, nekit1000,
mpartap, merlijn, martin_rysavy, agx, lee.jones, daniel.thompson,
jingoohan1, dri-devel, tomi.valkeinen, jjhiblot
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Hi!
> > It would be good to get LED backlight to work in clean way for 5.6
> > kernel.
>
> I agree, this is badly needed for many devices.
>
> > [If you have an idea what else is needed, it would be welcome; it
> > works for me in development tree but not in tree I'd like to
> > upstream.]
>
> I have some version of these patches working with modified dts in my
> droid4-pending-v5.4 branch git branch, maybe try to diff against that.
So.. backlight now works for me, and I put the LED parts of the
patches to
gitolite.kernel.org:pub/scm/linux/kernel/git/pavel/linux-leds.git for-next
tree. [I guess I could try to sneak them into 5.5 if that helps.]
Could we somehow get this to the backlight tree?
commit d457d0c97d6d55fe3e62633791ac05d289a37d2e
Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Thu Oct 3 10:28:12 2019 +0200
backlight: add led-backlight driver
This patch adds a led-backlight driver (led_bl), which is similar
to pwm_bl except the driver uses a LED class driver to adjust the
brightness in the HW. Multiple LEDs can be used for a single
backlight.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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