linux-kernel - Re: [PATCH v2 1/5] dt-bindings: display: sitronix,st7735r: Convert to DT schema

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Message-ID: <20200115210104.GA28904@ravnborg.org>
Date:   Wed, 15 Jan 2020 22:01:04 +0100
From:   Sam Ravnborg <sam@...nborg.org>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Noralf Trønnes <noralf@...nnes.org>,
        David Lechner <david@...hnology.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Chris Brandt <chris.brandt@...esas.com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/5] dt-bindings: display: sitronix,st7735r: Convert
 to DT schema

Hi Geert.

Thanks for doing the conversion to meta-schema.

On Wed, Jan 15, 2020 at 01:45:44PM +0100, Geert Uytterhoeven wrote:
> Convert the DT binding documentation for Sitronix ST7735R displays to DT
> schema.
> 
> Add a reference to the Adafruit 1.8" LCD while at it.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---

> diff --git a/Documentation/devicetree/bindings/display/sitronix,st7735r.yaml b/Documentation/devicetree/bindings/display/sitronix,st7735r.yaml
> new file mode 100644
> index 0000000000000000..21bccc91f74255e1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/sitronix,st7735r.yaml
> @@ -0,0 +1,65 @@
> +# SPDX-License-Identifier: GPL-2.0-only
Use (GPL-2.0-only OR BSD-2-Clause) for new binding files.

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/sitronix,st7735r.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sitronix ST7735R Display Panels Device Tree Bindings
> +
> +maintainers:
> +  - David Lechner <david@...hnology.com>
> +
> +description:
> +  This binding is for display panels using a Sitronix ST7735R controller in
> +  SPI mode.
> +
> +allOf:
> +  - $ref: panel/panel-common.yaml#

I am no binding expert so I do not know how to add it.
But the old binding described that this MUST be a child of spi.
This is missing here.

Other panels using spi does not have it - so it is probarly OK.

So with the license fixed:
Reviewed-by: Sam Ravnborg <sam@...nborg.org>

> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - description:
> +          Adafruit 1.8" 160x128 Color TFT LCD (Product ID 358 or 618)
> +        items:
> +          - enum:
> +              - jianda,jd-t18003-t01
> +          - const: sitronix,st7735r
> +
> +  spi-max-frequency:
> +    maximum: 32000000
> +
> +  dc-gpios:
> +    maxItems: 1
> +    description: Display data/command selection (D/CX)
> +
> +required:
> +  - compatible
> +  - reg
> +  - dc-gpios
> +  - reset-gpios
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    backlight: backlight {
> +            compatible = "gpio-backlight";
> +            gpios = <&gpio 44 GPIO_ACTIVE_HIGH>;
> +    };
> +
> +    spi {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            display@0{
> +                    compatible = "jianda,jd-t18003-t01", "sitronix,st7735r";
> +                    reg = <0>;
> +                    spi-max-frequency = <32000000>;
> +                    dc-gpios = <&gpio 43 GPIO_ACTIVE_HIGH>;
> +                    reset-gpios = <&gpio 80 GPIO_ACTIVE_HIGH>;
> +                    rotation = <270>;
> +            };
> +    };
> +
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index ea8262509bdd21ac..3007f83bd504194a 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -5382,7 +5382,7 @@ M:	David Lechner <david@...hnology.com>
>  T:	git git://anongit.freedesktop.org/drm/drm-misc
>  S:	Maintained
>  F:	drivers/gpu/drm/tiny/st7735r.c
> -F:	Documentation/devicetree/bindings/display/sitronix,st7735r.txt
> +F:	Documentation/devicetree/bindings/display/sitronix,st7735r.yaml
>  
>  DRM DRIVER FOR SONY ACX424AKP PANELS
>  M:	Linus Walleij <linus.walleij@...aro.org>
> -- 
> 2.17.1