linux-kernel - Re: [PATCH] backlight: pm8941-wled: Move PM8941 WLED driver to backlight

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Message-ID: <20150720174532.GA4753@usrtlx11787.corpusers.net>
Date:	Mon, 20 Jul 2015 10:45:32 -0700
From:	Bjorn Andersson <bjorn.andersson@...ymobile.com>
To:	Jingoo Han <jingoohan1@...il.com>
CC:	'Rob Herring' <robh+dt@...nel.org>,
	'Pawel Moll' <pawel.moll@....com>,
	'Mark Rutland' <mark.rutland@....com>,
	'Ian Campbell' <ijc+devicetree@...lion.org.uk>,
	'Kumar Gala' <galak@...eaurora.org>,
	'Bryan Wu' <cooloney@...il.com>,
	'Richard Purdie' <rpurdie@...ys.net>,
	'Jacek Anaszewski' <j.anaszewski@...sung.com>,
	'Lee Jones' <lee.jones@...aro.org>,
	'Jean-Christophe Plagniol-Villard' <plagnioj@...osoft.com>,
	'Tomi Valkeinen' <tomi.valkeinen@...com>,
	'Rob Clark' <robdclark@...il.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH] backlight: pm8941-wled: Move PM8941 WLED driver to
 backlight

On Mon 20 Jul 07:22 PDT 2015, Jingoo Han wrote:

> On Thursday, July 16, 2015 5:02 AM, Bjorn Andersson wrote:
> > 
> > The Qualcomm PM8941 WLED block is used for backlight and should therefor
> > be in the backlight framework and not in the LED framework. This moves
> > the driver and adapts to the backlight api instead.
> > 
> > Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
> > ---
> >  .../devicetree/bindings/leds/leds-pm8941-wled.txt  |  5 +-
> >  drivers/leds/Kconfig                               |  8 ---
> >  drivers/leds/Makefile                              |  1 -
> >  drivers/video/backlight/Kconfig                    |  8 +++
> >  drivers/video/backlight/Makefile                   |  1 +
> >  .../backlight/pm8941-wled.c}                       | 59 ++++++++++------------
> >  6 files changed, 36 insertions(+), 46 deletions(-)
> >  rename drivers/{leds/leds-pm8941-wled.c => video/backlight/pm8941-wled.c} (90%)
> > 
> > diff --git a/Documentation/devicetree/bindings/leds/leds-pm8941-wled.txt
> > b/Documentation/devicetree/bindings/leds/leds-pm8941-wled.txt
> > index a85a964d61f5..424f8444a6cd 100644
> > --- a/Documentation/devicetree/bindings/leds/leds-pm8941-wled.txt
> > +++ b/Documentation/devicetree/bindings/leds/leds-pm8941-wled.txt
> 
> Please move this txt file to 'backlight' directory.
> 

Of course

[..]

> > diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
> > index 0505b796d743..6c67c5430933 100644
> > --- a/drivers/video/backlight/Kconfig
> > +++ b/drivers/video/backlight/Kconfig
> > @@ -299,6 +299,14 @@ config BACKLIGHT_TOSA
> >  	  If you have an Sharp SL-6000 Zaurus say Y to enable a driver
> >  	  for its backlight
> > 
> > +config BACKLIGHT_PM8941_WLED
> > +	tristate "Qualcomm PM8941 WLED Driver"
> > +	depends on LEDS_CLASS
> 
> LEDS_CLASS?
> Please check your patch carefully.
> 

Sorry about that.

> One more thing,
> Did you test this patch with the board?
> If not, I will not accept this patch, unless other people send 'Tested-by'.

I've tested the driver on the Sony Xperia Z3 and it visually behaves as
expected.

I'll send you an updated patch shortly.

Thank you,
Bjorn
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