Re: [RFC v2 2/8] dt-bindings: display: add ingenic-jz4780-hdmi DT Schema

[Paul Cercueil <paul@crapouillou.net>]

Hi Nikolaus,


Le ven., févr. 28, 2020 at 19:19, H. Nikolaus Schaller 
<hns@goldelico.com> a écrit :
> From: Sam Ravnborg <sam@ravnborg.org>
> 
> Add DT bindings for the hdmi driver for the Ingenic JZ4780 SoC.
> Based on .txt binding from Zubair Lutfullah Kakakhel
> 
> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
> Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
> Cc: H. Nikolaus Schaller <hns@goldelico.com>
> Cc: Rob Herring <robh@kernel.org>
> Cc: devicetree@vger.kernel.org
> ---
>  .../bindings/display/ingenic-jz4780-hdmi.yaml | 83 
> +++++++++++++++++++
>  1 file changed, 83 insertions(+)
>  create mode 100644 
> Documentation/devicetree/bindings/display/ingenic-jz4780-hdmi.yaml
> 
> diff --git 
> a/Documentation/devicetree/bindings/display/ingenic-jz4780-hdmi.yaml 
> b/Documentation/devicetree/bindings/display/ingenic-jz4780-hdmi.yaml
> new file mode 100644
> index 000000000000..9b71c427bd69
> --- /dev/null
> +++ 
> b/Documentation/devicetree/bindings/display/ingenic-jz4780-hdmi.yaml
> @@ -0,0 +1,83 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/ingenic-jz4780-hdmi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Bindings for Ingenic JZ4780 HDMI Transmitter
> +
> +maintainers:
> +  - Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
> +  - H. Nikolaus Schaller <hns@goldelico.com>

Did Zubair write this glue driver? He's been MIA for a while, doesn't 
work at ImgTec anymore, and this email doesn't work.

> +
> +description: |
> +  The HDMI Transmitter in the Ingenic JZ4780 is a Synopsys 
> DesignWare HDMI 1.4
> +  TX controller IP with accompanying PHY IP.
> +
> +allOf:
> +  - $ref: panel/panel-common.yaml#
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: ingenic,jz4780-hdmi
> +
> +  reg:
> +    maxItems: 1
> +    description: the address & size of the LCD controller registers

Remove the description here,

> +
> +  reg-io-width:
> +    const: 4
> +
> +  interrupts:
> +    maxItems: 1
> +    description: Specifies the interrupt provided by parent

and here.

The rule is that if there is only one "reg", "interrupts" or "clocks" 
entry then a description is not needed as it's pretty obvious what it's 
for.

> +
> +  clocks:
> +    maxItems: 2
> +    description: Clock specifiers for isrf and iahb clocks

You need two 'description:' like this:

clocks:
  items:
    - description: ISRF clock
    - description: IAHB clock

Cheers,
-Paul

> +
> +  clock-names:
> +    items:
> +      - const: isfr
> +      - const: iahb
> +
> +  ddc-i2c-bus: true
> +  ports: true
> +
> +required:
> +    - compatible
> +    - clocks
> +    - clock-names
> +    - ports
> +    - reg-io-width
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/jz4780-cgu.h>
> +
> +    hdmi: hdmi@10180000 {
> +        compatible = "ingenic,jz4780-hdmi";
> +        reg = <0x10180000 0x8000>;
> +        reg-io-width = <4>;
> +        ddc-i2c-bus = <&i2c4>;
> +        interrupt-parent = <&intc>;
> +        interrupts = <3>;
> +        clocks = <&cgu JZ4780_CLK_HDMI>, <&cgu JZ4780_CLK_AHB0>;
> +        clock-names = "isfr", "iahb";
> +
> +        ports {
> +            hdmi_in: port {
> +                #address-cells = <1>;
> +                #size-cells = <0>;
> +                hdmi_in_lcd: endpoint@0 {
> +                    reg = <0>;
> +                    remote-endpoint = <&jz4780_out_hdmi>;
> +                };
> +            };
> +        };
> +    };
> +
> +...
> --
> 2.23.0
>