linux-kernel - Re: [PATCH 4/5] ARM: dts: tx53: add simple-panel support

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Date:	Tue, 25 Mar 2014 14:14:07 +0100
From:	Lothar Waßmann <LW@...O-electronics.de>
To:	Shawn Guo <shawn.guo@...escale.com>
Cc:	Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org,
	Russell King <linux@....linux.org.uk>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
	Sascha Hauer <kernel@...gutronix.de>,
	Kumar Gala <galak@...eaurora.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 4/5] ARM: dts: tx53: add simple-panel support

Hi,

Shawn Guo wrote:
> On Wed, Mar 19, 2014 at 02:28:40PM +0100, Lothar Waßmann wrote:
> > 
> > Signed-off-by: Lothar Waßmann <LW@...O-electronics.de>
> > ---
> >  arch/arm/boot/dts/imx53-tx53-x13x.dts |   12 ++++++++++++
> >  1 file changed, 12 insertions(+)
> > 
> > diff --git a/arch/arm/boot/dts/imx53-tx53-x13x.dts b/arch/arm/boot/dts/imx53-tx53-x13x.dts
> > index 26b918e..86a964d 100644
> > --- a/arch/arm/boot/dts/imx53-tx53-x13x.dts
> > +++ b/arch/arm/boot/dts/imx53-tx53-x13x.dts
> > @@ -63,6 +63,18 @@
> >  		default-brightness-level = <50>;
> >  	};
> >  
> > +	panel0 {
> > +		compatible = "simple-panel";
> 
> From what I can see, "simple-panel" is not a documented compatible.
> 
There is Documentation/devicetree/bindings/panel/simple-panel.txt
which describes the bindings for drivers/gpu/drm/panel/panel-simple.c.
"simple-panel" is the common compatible for all panels that the driver
supports. If no compatible for a specific panel is given, the
driver supports a generic panel with an ENABLE GPIO, an attached
backlight and a regulator. This is what's being used here. 


Lothar Waßmann
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