linux-kernel - Re: [PATCH 2/3] dt-bindings: display: panel: Add panels based on ILITEK ILI9806E

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Message-ID: <20230724143152.GA3430423-robh@kernel.org>
Date:   Mon, 24 Jul 2023 08:31:52 -0600
From:   Rob Herring <robh@...nel.org>
To:     Luca Ceresoli <luca.ceresoli@...tlin.com>
Cc:     Neil Armstrong <neil.armstrong@...aro.org>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Subject: Re: [PATCH 2/3] dt-bindings: display: panel: Add panels based on
 ILITEK ILI9806E

On Thu, Jul 20, 2023 at 03:52:38PM +0200, Luca Ceresoli wrote:
> Hello Rob,
> 
> thanks for reviewing.
> 
> On Wed, 19 Jul 2023 13:02:54 -0600
> Rob Herring <robh@...nel.org> wrote:
> 
> > On Wed, Jul 19, 2023 at 05:21:46PM +0200, Luca Ceresoli wrote:
> > > Add bindings for LCD panels based on the ILITEK ILI9806E RGB controller
> > > connected over SPI and the "ShenZhen New Display Co NDS040480800-V3"
> > > 480x800 panel based on it.
> > > 
> > > Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
> > > ---
> > >  .../display/panel/ilitek,ili9806e.yaml        | 69 +++++++++++++++++++
> > >  MAINTAINERS                                   |  6 ++
> > >  2 files changed, 75 insertions(+)
> > >  create mode 100644 Documentation/devicetree/bindings/display/panel/ilitek,ili9806e.yaml
> > > 
> > > diff --git a/Documentation/devicetree/bindings/display/panel/ilitek,ili9806e.yaml b/Documentation/devicetree/bindings/display/panel/ilitek,ili9806e.yaml
> > > new file mode 100644
> > > index 000000000000..42abc6923065
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/display/panel/ilitek,ili9806e.yaml
> > > @@ -0,0 +1,69 @@
> > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/display/panel/ilitek,ili9806e.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Ilitek ILI9806E display panels
> > > +
> > > +maintainers:
> > > +  - Luca Ceresoli <luca.ceresoli@...tlin.com>
> > > +
> > > +description:
> > > +  This binding is for display panels using an Ilitek ILI9806E controller in
> > > +  SPI mode.
> > > +
> > > +allOf:
> > > +  - $ref: panel-common.yaml#  
> > 
> > A SPI device should reference spi-peripheral-props.yaml as well.
> > 
> > > +
> > > +properties:
> > > +  compatible:
> > > +    items:
> > > +      - enum:
> > > +          # ShenZhen New Display Co 3.97" 480x800 RGB a-SI TFT LCD
> > > +          - newdisplay,nds040480800-v3
> > > +      - const: ilitek,ili9806e
> > > +
> > > +  reg: true  
> > 
> > maxItems: 1
> > 
> > > +  spi-max-frequency: true
> > > +  reset-gpios: true
> > > +  backlight: true
> > > +  port: true  
> > 
> > Drop all these and ...
> > 
> > > +
> > > +required:
> > > +  - compatible
> > > +  - reg
> > > +  - port
> > > +
> > > +additionalProperties: false  
> > 
> > ... use "unevaluatedProperties" instead.
> > 
> > > +
> > > +examples:
> > > +  - |
> > > +    #include <dt-bindings/gpio/gpio.h>
> > > +
> > > +    backlight: backlight {
> > > +        compatible = "gpio-backlight";
> > > +        gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
> > > +    };  
> > 
> > The exact backlight is outside the scope of this binding and should be 
> > dropped from the example.
> 
> As this comes from copy-pasting from the bindings yaml for another
> panel, would it be useful if I send a patch to remove it?

Yes.

Rob