linux-kernel - Re: [PATCH v6 5/6] media: dt-bindings: mt9p031: Convert bindings to yaml

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Date:   Fri, 16 Jul 2021 13:23:31 -0600
From:   Rob Herring <robh@...nel.org>
To:     Stefan Riedmueller <s.riedmueller@...tec.de>
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 5/6] media: dt-bindings: mt9p031: Convert bindings to
 yaml

On Wed, Jul 14, 2021 at 03:38:48PM +0200, Stefan Riedmueller wrote:
> Convert mt9p031 sensor bindings to yaml schema. Also update the
> MAINTAINERS entry.
> 
> Although input-clock-frequency and pixel-clock-frequency have not been
> definded as endpoint propierties in the textual bindings, the sensor
> does parse them from the endpoint. Thus move these properties to the
> endpoint in the new yaml bindings.
> 
> Signed-off-by: Stefan Riedmueller <s.riedmueller@...tec.de>
> ---
>  .../bindings/media/i2c/aptina,mt9p031.yaml    | 92 +++++++++++++++++++
>  .../devicetree/bindings/media/i2c/mt9p031.txt | 40 --------
>  MAINTAINERS                                   |  1 +
>  3 files changed, 93 insertions(+), 40 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/media/i2c/aptina,mt9p031.yaml
>  delete mode 100644 Documentation/devicetree/bindings/media/i2c/mt9p031.txt
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/aptina,mt9p031.yaml b/Documentation/devicetree/bindings/media/i2c/aptina,mt9p031.yaml
> new file mode 100644
> index 000000000000..1531ecd1ed95
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/aptina,mt9p031.yaml
> @@ -0,0 +1,92 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/i2c/aptina,mt9p031.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Aptina 1/2.5-Inch 5Mp CMOS Digital Image Sensor
> +
> +maintainers:
> +  - Laurent Pinchart <laurent.pinchart@...asonboard.com>
> +
> +description: |
> +  The Aptina MT9P031 is a 1/2.5-inch CMOS active pixel digital image sensor
> +  with an active array size of 2592H x 1944V. It is programmable through a
> +  simple two-wire serial interface.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - aptina,mt9p031
> +      - aptina,mt9p031m
> +
> +  reg:
> +    description: I2C device address
> +    maxItems: 1
> +
> +  reset-gpios:
> +    maxItems: 1
> +    description: Chip reset GPIO
> +
> +  port:
> +    $ref: /schemas/graph.yaml#/$defs/port-base
> +    additionalProperties: false
> +
> +    properties:
> +      endpoint:
> +        $ref: /schemas/media/video-interfaces.yaml#
> +        unevaluatedProperties: false
> +
> +        properties:
> +          input-clock-frequency:
> +            $ref: /schemas/types.yaml#/definitions/uint32
> +            minimum: 6000000
> +            maximum: 96000000
> +            description: Input clock frequency
> +
> +          pixel-clock-frequency:
> +            $ref: /schemas/types.yaml#/definitions/uint32
> +            maximum: 96000000
> +            description: Target pixel clock frequency
> +
> +          bus-type:
> +            const: 5
> +
> +          bus-width:
> +            const: 12

If there's only 1 possible setting for both of these, why do they need 
to be in DT?

Rob