linux-kernel - Re: [PATCH v3 6a/7] dt-bindings: Add ANX6345 DP/eDP transmitter binding

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Message-ID: <20190726163601.o32bxqew5xavjgyi@flea>
Date:   Fri, 26 Jul 2019 18:36:01 +0200
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Torsten Duwe <duwe@....de>
Cc:     Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Icenowy Zheng <icenowy@...c.io>,
        Sean Paul <seanpaul@...omium.org>,
        Vasily Khoruzhick <anarsoul@...il.com>,
        Harald Geyer <harald@...ib.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 6a/7] dt-bindings: Add ANX6345 DP/eDP transmitter
 binding

Hi,

On Thu, Jul 25, 2019 at 05:18:29PM +0200, Torsten Duwe wrote:
> The anx6345 is an ultra-low power DisplayPort/eDP transmitter designed
> for portable devices.
>
> Add a binding document for it.
>
> Signed-off-by: Icenowy Zheng <icenowy@...c.io>
> Signed-off-by: Vasily Khoruzhick <anarsoul@...il.com>
> Reviewed-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Torsten Duwe <duwe@...e.de>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> ---
>  .../devicetree/bindings/display/bridge/anx6345.yaml |   90 ++++++++++
>  1 file changed, 90 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/bridge/anx6345.yaml
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/anx6345.yaml b/Documentation/devicetree/bindings/display/bridge/anx6345.yaml
> new file mode 100644
> index 000000000000..0af092d101c5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/anx6345.yaml
> @@ -0,0 +1,90 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/bridge/anx6345.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analogix ANX6345 eDP Transmitter Device Tree Bindings
> +
> +maintainers:
> +  - Torsten Duwe <duwe@....de>
> +
> +description: |
> +  The ANX6345 is an ultra-low power Full-HD eDP transmitter designed for
> +  portable devices.
> +
> +properties:
> +  compatible:
> +    const: analogix,anx6345
> +
> +  reg:
> +    maxItems: 1
> +    description: I2C address of the device
> +
> +  reset-gpios:
> +    maxItems: 1
> +    description: active low GPIO to use for reset
> +
> +  dvdd12-supply:
> +    maxItems: 1
> +    description: Regulator for 1.2V digital core power.
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +
> +  dvdd25-supply:
> +    maxItems: 1
> +    description: Regulator for 2.5V digital core power.
> +    $ref: /schemas/types.yaml#/definitions/phandle

There's no need to specify the type here, all the properties ending in
-supply are already checked for that type

> +  ports:
> +    type: object
> +    minItems: 1
> +    maxItems: 2
> +    description: |
> +      Video port 0 for LVTTL input,
> +      Video port 1 for eDP output (panel or connector)
> +      using the DT bindings defined in
> +      Documentation/devicetree/bindings/media/video-interfaces.txt

You should probably describe the port@0 and port@1 nodes here as
well. It would allow you to express that the port 0 is mandatory and
the port 1 optional, which got dropped in the conversion.

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com