linux-kernel - Re: [PATCH v4 1/2] ARM64: dts: sun50i-h6-pine-h64: state that the DT supports the modelA

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Date:   Tue, 12 Nov 2019 13:51:59 +0100
From:   LABBE Corentin <clabbe@...libre.com>
To:     Maxime Ripard <mripard@...nel.org>
Cc:     mark.rutland@....com, robh+dt@...nel.org, wens@...e.org,
        jernej.skrabec@...l.net, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH v4 1/2] ARM64: dts: sun50i-h6-pine-h64: state that the DT
 supports the modelA

On Tue, Nov 12, 2019 at 01:02:19PM +0100, Maxime Ripard wrote:
> Hi,
> 
> On Sat, Nov 09, 2019 at 04:20:32PM +0000, Corentin Labbe wrote:
> > The current sun50i-h6-pine-h64 DT does not specify which model (A or B)
> > it supports.
> > When this file was created, only modelA was existing, but now both model
> > exists and with the time, this DT drifted to support the model B since it is
> > the most common one.
> > Furtheremore, some part of the model A does not work with it like ethernet and
> > HDMI connector (as confirmed by Jernej on IRC).
> >
> > So it is time to settle the issue, and the easiest way was to state that
> > this DT is for model B.
> > Easiest since only a small name changes is required.
> > Doing the opposite (stating this file is for model A) will add changes (for
> > ethernet and HDMI) and so, will break too many setup.
> >
> > But as asked by the maintainer this patch state this file is for model A.
> > In the process this patch adds the missing compoments to made it work on
> > model A.
> >
> > Signed-off-by: Corentin Labbe <clabbe@...libre.com>
> > ---
> >  .../devicetree/bindings/arm/sunxi.yaml        |  4 ++--
> >  .../boot/dts/allwinner/sun50i-h6-pine-h64.dts | 19 +++++++++++++++----
> >  2 files changed, 17 insertions(+), 6 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/arm/sunxi.yaml b/Documentation/devicetree/bindings/arm/sunxi.yaml
> > index 8a1e38a1d7ab..b8ec616c2538 100644
> > --- a/Documentation/devicetree/bindings/arm/sunxi.yaml
> > +++ b/Documentation/devicetree/bindings/arm/sunxi.yaml
> > @@ -599,9 +599,9 @@ properties:
> >            - const: pine64,pine64-plus
> >            - const: allwinner,sun50i-a64
> >
> > -      - description: Pine64 PineH64
> > +      - description: Pine64 PineH64 model A
> >          items:
> > -          - const: pine64,pine-h64
> > +          - const: pine64,pine-h64-modelA
> 
> You can change the description to make it more obvious if you want to,
> but changing the compatible is a no-go.
> 
> >            - const: allwinner,sun50i-h6
> >
> >        - description: Pine64 LTS
> > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts b/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts
> > index 74899ede00fb..1d9afde4d3d7 100644
> > --- a/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts
> > +++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts
> > @@ -10,8 +10,8 @@
> >  #include <dt-bindings/gpio/gpio.h>
> >
> >  / {
> > -	model = "Pine H64";
> > -	compatible = "pine64,pine-h64", "allwinner,sun50i-h6";
> > +	model = "Pine H64 model A";
> > +	compatible = "pine64,pine-h64-modelA", "allwinner,sun50i-h6";
> 
> Same thing here, changing the model is fine, the compatible isn't
> 

Hello

I will erase compatible changes in next version.

> >  	aliases {
> >  		ethernet0 = &emac;
> > @@ -22,9 +22,10 @@
> >  		stdout-path = "serial0:115200n8";
> >  	};
> >
> > -	connector {
> > +	hdmi_connector: connector {
> 
> Why do you need to add the label?
> 

For dropping the ddc-en-gpios property in model B.
If you want, I can split this line change in an extra patch.

Regards