[PATCH] backlight: add led-backlight driver

[Lee Jones]

On Wed, 19 Feb 2020, Tony Lindgren wrote:

> * Pavel Machek <pavel at ucw.cz> [200219 19:15]:
> > From: Tomi Valkeinen <tomi.valkeinen at ti.com>
> > 
> > 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 at ti.com>
> > Signed-off-by: Jean-Jacques Hiblot <jjhiblot at ti.com>
> > Acked-by: Pavel Machek <pavel at ucw.cz>
> > Reviewed-by: Daniel Thompson <daniel.thompson at linaro.org>
> > Acked-by: Lee Jones <lee.jones at linaro.org>
> > Acked-by: Tony Lindgren <tony at atomide.com>
> > Tested-by: Tony Lindgren <tony at atomide.com>
> > Signed-off-by: Pavel Machek <pavel at ucw.cz>
> > ---
> >  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
> > 
> > Hi!
> > 
> > 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.

Please do.  You already have my Ack.

--
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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