Re: [PATCH v9 2/4] dt-bindings: media: document SK Hynix Hi-846 MIPI CSI-2 8M pixel sensor

[Geert Uytterhoeven <geert@linux-m68k.org>]

On Mon, Sep 6, 2021 at 12:30 PM Martin Kepplinger
<martin.kepplinger@puri.sm> wrote:
> Document the bindings used for the SK Hynix Hi-846 CMOS camera driver.
>
> Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> ---
>  .../bindings/media/i2c/hynix,hi846.yaml       | 120 ++++++++++++++++++
>  1 file changed, 120 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/i2c/hynix,hi846.yaml
>
> diff --git a/Documentation/devicetree/bindings/media/i2c/hynix,hi846.yaml b/Documentation/devicetree/bindings/media/i2c/hynix,hi846.yaml
> new file mode 100644
> index 000000000000..85a8877c2f38
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/hynix,hi846.yaml
> @@ -0,0 +1,120 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/i2c/hynix,hi846.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: SK Hynix Hi-846 1/4" 8M Pixel MIPI CSI-2 sensor
> +
> +maintainers:
> +  - Martin Kepplinger <martin.kepplinger@puri.sm>
> +
> +description: |-
> +  The Hi-846 is a raw image sensor with an MIPI CSI-2 image data
> +  interface and CCI (I2C compatible) control bus. The output format
> +  is raw Bayer.
> +
> +properties:
> +  compatible:
> +    const: hynix,hi846
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: Reference to the mclk clock.
> +
> +  assigned-clocks:
> +    maxItems: 1
> +
> +  assigned-clock-rates:
> +    maxItems: 1
> +
> +  reset-gpios:
> +    description: Reference to the GPIO connected to the RESETB pin. Active low.
> +    maxItems: 1
> +
> +  shutdown-gpios:
> +    description: Reference to the GPIO connected to the XSHUTDOWN pin. Active low.
> +    maxItems: 1
> +
> +  vddio-supply:
> +    description: Definition of the regulator used for the VDDIO power supply.
> +
> +  vdda-supply:
> +    description: Definition of the regulator used for the VDDA power supply.
> +
> +  vddd-supply:
> +    description: Definition of the regulator used for the VDDD power supply.
> +
> +  port:
> +    $ref: /schemas/graph.yaml#/properties/port
> +
> +    properties:
> +      endpoint:
> +        $ref: /schemas/media/video-interfaces.yaml#
> +        unevaluatedProperties: false
> +
> +        properties:
> +          data-lanes:
> +            oneOf:
> +              - items:
> +                  - const: 1
> +                  - const: 2
> +                  - const: 3
> +                  - const: 4
> +              - items:
> +                  - const: 1
> +                  - const: 2
> +
> +        required:
> +          - data-lanes
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - assigned-clocks
> +  - assigned-clock-rates
> +  - vddio-supply
> +  - vdda-supply
> +  - vddd-supply
> +  - port
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        hi846: camera@20 {
> +            compatible = "hynix,hi846";
> +            reg = <0x20>;
> +            pinctrl-names = "default";
> +            pinctrl-0 = <&pinctrl_csi1>;
> +            clocks = <&clk 0>;
> +            assigned-clocks = <&clk 0>;
> +            assigned-clock-rates = <25000000>;
> +            vdda-supply = <&reg_camera_vdda>;
> +            vddd-supply = <&reg_camera_vddd>;
> +            vddio-supply = <&reg_camera_vddio>;
> +            reset-gpios = <&gpio1 25 GPIO_ACTIVE_LOW>;
> +            shutdown-gpios = <&gpio5 4 GPIO_ACTIVE_LOW>;
> +
> +            port {
> +                camera_out: endpoint {
> +                    remote-endpoint = <&csi1_ep1>;
> +                    link-frequencies = /bits/ 64
> +                        <80000000 200000000>;
> +                    data-lanes = <1 2>;

"make dt_binding_check":

    Documentation/devicetree/bindings/media/i2c/hynix,hi846.example.dt.yaml:
camera@20: port:endpoint: Unevaluated properties are not allowed
('link-frequencies', 'data-lanes' were unexpected)
    From schema: Documentation/devicetree/bindings/media/i2c/hynix,hi846.yaml

> +                };
> +            };
> +        };
> +    };

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds