Re: [PATCH] backlight: add led-backlight driver
From: Pavel Machek
Date: Wed Feb 19 2020 - 15:53:27 EST
> > 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@xxxxxx>
> > Signed-off-by: Jean-Jacques Hiblot <jjhiblot@xxxxxx>
> > Acked-by: Pavel Machek <pavel@xxxxxx>
> > Reviewed-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx>
> > Acked-by: Lee Jones <lee.jones@xxxxxxxxxx>
> > Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>
> > Tested-by: Tony Lindgren <tony@xxxxxxxxxxx>
> > Signed-off-by: Pavel Machek <pavel@xxxxxx>
> > ---
> > drivers/video/backlight/Kconfig | 7 ++
> > drivers/video/backlight/Makefile | 1 +
> > drivers/video/backlight/led_bl.c | 260 +++++++++++++++++++++++++++++++++++++++
> > 3 files changed, 268 insertions(+)
> > create mode 100644 drivers/video/backlight/led_bl.c
> > Here's the version of the driver I have. AFAICT
> > default-brightness-level handling is ok, so does not need to be
> > changed.
> > Lee, it would be easiest for me if you could apply it to your tree and
> > push, but given enough time I can push it to Linus, too.
> Oh you're using quoted-printable for patches.. Got it applied now,
> and it still works. Below is also the related dts change that
> I tested with.
> Feel free to pick the dts change too, naturally that should
> not be applied before the driver.
> If you guys instead want me to pick these both into my fixes
> branch, just let me know and I'll do the explaining why these
> are needed as fixes. Basically we no longer have a way to enable
> the LCD backlight for droid4 manually starting with v5.6-rc1
> unlike earlier.
If you are willing to do that, it looks like good solution from my
point of view.
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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