linux-kernel - Re: [PATCH 1/2] dt-bindings: media: i2c: add galaxycore,gc2145 dt-bindings

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Message-ID: <20230926-skyline-absolute-a563a42b1220@spud>
Date:   Tue, 26 Sep 2023 14:32:12 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Alain Volmat <alain.volmat@...s.st.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Andrey Skvortsov <andrej.skvortzov@...il.com>,
        Rob Herring <robh@...nel.org>, linux-media@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: media: i2c: add galaxycore,gc2145
 dt-bindings

Hey Alain,

On Tue, Sep 26, 2023 at 11:28:19AM +0200, Alain Volmat wrote:
> Introduction of the Galaxy Core GC2145 XVGA CMOS camera sensor.
> 
> Signed-off-by: Alain Volmat <alain.volmat@...s.st.com>
> ---
>  .../bindings/media/i2c/galaxycore,gc2145.yaml | 108 ++++++++++++++++++
>  .../devicetree/bindings/vendor-prefixes.yaml  |   2 +

AFAIU, changes to the vendor-prefixes file are done as standalone
patches.

>  2 files changed, 110 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/i2c/galaxycore,gc2145.yaml
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/galaxycore,gc2145.yaml b/Documentation/devicetree/bindings/media/i2c/galaxycore,gc2145.yaml
> new file mode 100644
> index 000000000000..e80b581498fc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/galaxycore,gc2145.yaml
> @@ -0,0 +1,108 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/i2c/galaxycore,gc2145.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Galaxy Core 1/5'' UXGA CMOS Image Sensor
> +
> +maintainers:
> +  - Alain Volmat <alain.volmat@...s.st.com>
> +
> +description: |

This | seems unneeded as you have no formatting to preserve.

> +  The Galaxy Core GC2145 is a high quality 2 Mega CMOS image sensor, for mobile
> +  phone camera applications and digital camera products. GC2145 incorporates a
> +  1616V x 1232H active pixel array, on-chip 10-bit ADC, and image signal
> +  processor. It is programmable through an I2C interface. Image data is sent
> +  either through a parallel interface or through MIPI CSI-2.
> +
> +allOf:
> +  - $ref: ../video-interface-devices.yaml#
> +
> +properties:
> +  compatible:
> +    const: galaxycore,gc2145
> +
> +  reg:
> +    enum:
> +      - 0x3c

If this is the only permitted address, this should be a const, rather
than an enum, no? Are you expecting the list to grow?

> +
> +  clocks:
> +    description: Reference to the xclk clock.
> +    maxItems: 1
> +
> +  powerdown-gpios:
> +    description: GPIO descriptor for the powerdown pin.
> +    maxItems: 1
> +
> +  reset-gpios:
> +    description: GPIO descriptor for the reset pin.
> +    maxItems: 1

Where you only have a single entry, a lot of these descriptions are
superfluous.

Generally, this looks pretty good to me.

Thanks,
Conor.

> +
> +  IOVDD-supply:
> +    description: Power Supply for I/O circuits (1.7 - 3V).
> +
> +  AVDD-supply:
> +    description: Power for analog circuit/sensor array (2.7 - 3V).
> +
> +  DVDD-supply:
> +    description: Power for digital core (1.7 - 1.9V).
> +
> +  orientation: true
> +
> +  rotation: true
> +
> +  port:
> +    $ref: /schemas/graph.yaml#/$defs/port-base
> +
> +    properties:
> +      endpoint:
> +        $ref: /schemas/media/video-interfaces.yaml#
> +        unevaluatedProperties: false
> +
> +    required:
> +      - endpoint
> +
> +    additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - powerdown-gpios
> +  - reset-gpios
> +  - IOVDD-supply
> +  - AVDD-supply
> +  - DVDD-supply
> +  - port
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    i2c5 {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        gc2145@3c {
> +            compatible = "galaxycore,gc2145";
> +            reg = <0x3c>;
> +            clocks = <&clk_ext_camera>;
> +            IOVDD-supply = <&scmi_v3v3_sw>;
> +            AVDD-supply = <&scmi_v3v3_sw>;
> +            DVDD-supply = <&scmi_v3v3_sw>;
> +            powerdown-gpios = <&mcp23017 3 (GPIO_ACTIVE_LOW | GPIO_PUSH_PULL)>;
> +            reset-gpios = <&mcp23017 4 (GPIO_ACTIVE_LOW | GPIO_PUSH_PULL)>;
> +
> +            port {
> +                endpoint {
> +                    remote-endpoint = <&mipid02_0>;
> +                    data-lanes = <1 2>;
> +                };
> +            };
> +        };
> +    };
> +
> +...
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> index 573578db9509..d9df03bba5bb 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> @@ -494,6 +494,8 @@ patternProperties:
>      description: Fujitsu Ltd.
>    "^fxtec,.*":
>      description: FX Technology Ltd.
> +  "^galaxycore,.*":
> +    description: Galaxy Core Inc.
>    "^gardena,.*":
>      description: GARDENA GmbH
>    "^gateworks,.*":
> -- 
> 2.25.1
> 

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