linux-kernel - Re: [PATCH v2 2/2] dt-bindings: media: Add OV5642

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Date:   Wed, 2 Aug 2023 16:25:13 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Fabio Estevam <festevam@...x.de>
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] dt-bindings: media: Add OV5642

Hey, 

On Tue, Aug 01, 2023 at 08:40:47PM -0300, Fabio Estevam wrote:
> Add DT bindings for OmniVision OV5642 Image Sensor.
> 
> Signed-off-by: Fabio Estevam <festevam@...x.de>

Thanks for doing this. It looks good to me, although I got a complaint
from git while applying it locally:
Applying: dt-bindings: trivial-devices: Remove the OV5642 entry
Applying: dt-bindings: media: Add OV5642
/stuff/linux/.git/worktrees/linux-dt/rebase-apply/patch:119: trailing whitespace.
  
warning: 1 line adds whitespace errors.

I think you can probably squash both patches and add a
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
I have one minor comment below.

I also think it'd be good to CC the media folks though on this.

> ---
> Changes since v1:
> - Introduce ov5642.yaml (Conor).
> 
>  .../bindings/media/i2c/ovti,ov5642.yaml       | 118 ++++++++++++++++++
>  1 file changed, 118 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/i2c/ovti,ov5642.yaml
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/ovti,ov5642.yaml b/Documentation/devicetree/bindings/media/i2c/ovti,ov5642.yaml
> new file mode 100644
> index 000000000000..585b4fcf01b3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/ovti,ov5642.yaml
> @@ -0,0 +1,118 @@
> +# SPDX-License-Identifier: GPL-2.0-only

Bindings are usually dual licensed. Is there a reason not to do so here?

Thanks,
Conor.

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/i2c/ovti,ov5642.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: OmniVision OV5642 Image Sensor
> +
> +maintainers:
> +  - Fabio Estevam <festevam@...il.com>
> +
> +allOf:
> +  - $ref: /schemas/media/video-interface-devices.yaml#
> +
> +properties:
> +  compatible:
> +    const: ovti,ov5642
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    description: XCLK Input Clock
> +
> +  clock-names:
> +    const: xclk
> +
> +  AVDD-supply:
> +    description: Analog voltage supply, 2.8V.
> +
> +  DVDD-supply:
> +    description: Digital core voltage supply, 1.5V.
> +
> +  DOVDD-supply:
> +    description: Digital I/O voltage supply, 1.8V.
> +
> +  powerdown-gpios:
> +    maxItems: 1
> +    description: Reference to the GPIO connected to the powerdown pin, if any.
> +
> +  reset-gpios:
> +    maxItems: 1
> +    description: Reference to the GPIO connected to the reset pin, if any.
> +
> +  rotation:
> +    enum:
> +      - 0
> +      - 180
> +
> +  port:
> +    description: Digital Output Port
> +    $ref: /schemas/graph.yaml#/$defs/port-base
> +    additionalProperties: false
> +
> +    properties:
> +      endpoint:
> +        $ref: /schemas/media/video-interfaces.yaml#
> +        unevaluatedProperties: false
> +
> +        properties:
> +          clock-lanes:
> +            const: 0
> +
> +          data-lanes:
> +            minItems: 1
> +            maxItems: 2
> +            items:
> +              enum: [1, 2]
> +
> +          bus-width:
> +            enum: [8, 10]
> +
> +          data-shift:
> +            enum: [0, 2]
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - port
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +      #include <dt-bindings/gpio/gpio.h>
> +
> +      i2c {
> +          #address-cells = <1>;
> +          #size-cells = <0>;
> +
> +          camera@3c {
> +              compatible = "ovti,ov5642";
> +              pinctrl-names = "default";
> +              pinctrl-0 = <&pinctrl_ov5642>;
> +              reg = <0x3c>;
> +              clocks = <&clk_ext_camera>;
> +              clock-names = "xclk";
> +              DOVDD-supply = <&vgen4_reg>;
> +              AVDD-supply = <&vgen3_reg>;
> +              DVDD-supply = <&vgen2_reg>;
> +              powerdown-gpios = <&gpio1 19 GPIO_ACTIVE_HIGH>;
> +              reset-gpios = <&gpio1 20 GPIO_ACTIVE_LOW>;
> +  
> +              port {
> +                  /* Parallel bus endpoint */
> +                  ov5642_to_parallel: endpoint {
> +                      remote-endpoint = <&parallel_from_ov5642>;
> +                      bus-width = <8>;
> +                      data-shift = <2>; /* lines 9:2 are used */
> +                      hsync-active = <0>;
> +                      vsync-active = <0>;
> +                      pclk-sample = <1>;
> +                  };
> +              };
> +          };
> +      };
> -- 
> 2.34.1
> 

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