Re: [PATCH] dt-bindings: staging: media: i2c: Add bindings for Maxim Integrated MAX96712

[Kieran Bingham <kieran.bingham@ideasonboard.com>]

Quoting Niklas Söderlund (2021-11-23 21:49:22)
> Add bindings for Maxim Integrated MAX96712 deserializer. The MAX96712
> deserializer converts GMSL2 or GMSL1 serial inputs into MIPI CSI-2 D-PHY
> or C-PHY formatted outputs.
> 
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> ---
>  .../staging/media/i2c/maxim,max96712.yaml     | 111 ++++++++++++++++++
>  1 file changed, 111 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/staging/media/i2c/maxim,max96712.yaml
> 
> diff --git a/Documentation/devicetree/bindings/staging/media/i2c/maxim,max96712.yaml b/Documentation/devicetree/bindings/staging/media/i2c/maxim,max96712.yaml
> new file mode 100644
> index 0000000000000000..978f2c0e5caef567
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/staging/media/i2c/maxim,max96712.yaml
> @@ -0,0 +1,111 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) 2021 Renesas Electronics Corp.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/staging/media/i2c/maxim,max96712.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Quad GMSL2 to CSI-2 Deserializer with GMSL1 Compatibility
> +
> +maintainers:
> +  - Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> +
> +description: |
> +  The MAX96712 deserializer converts GMSL2 or GMSL1 serial inputs into MIPI
> +  CSI-2 D-PHY or C-PHY formatted outputs. The device allows each link to
> +  simultaneously transmit bidirectional control-channel data while forward
> +  video transmissions are in progress. The MAX96712 can accommodate as many as
> +  four remotely located sensors using industry-standard coax or STP
> +  interconnects.
> +
> +  Each GMSL2 serial link operates at a fixed rate of 3Gbps or 6Gbps in the
> +  forward direction and 187.5Mbps in the re- verse direction. In GMSL1 mode, the

/re- verse/reverse/


Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>

> +  MAX96712 can be paired with first-generation 3.12Gbps or 1.5Gbps GMSL1
> +  serializers or operate up to 3.12Gbps with GMSL2 serializers in GMSL1 mode.
> +
> +properties:
> +  compatible:
> +    const: maxim,max96712
> +
> +  reg:
> +    description: I2C device address
> +    maxItems: 1
> +
> +  enable-gpios: true
> +
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: GMSL Input 0
> +
> +      port@1:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: GMSL Input 1
> +
> +      port@2:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: GMSL Input 2
> +
> +      port@3:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: GMSL Input 3
> +
> +      port@4:
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
> +        description: CSI-2 Output
> +
> +        properties:
> +          endpoint:
> +            $ref: /schemas/media/video-interfaces.yaml#
> +            unevaluatedProperties: false
> +
> +            properties:
> +              data-lanes: true
> +
> +            required:
> +              - data-lanes
> +
> +    required:
> +      - port@4
> +
> +required:
> +  - compatible
> +  - reg
> +  - ports
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    i2c@e6508000 {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            reg = <0 0xe6508000>;
> +
> +            gmsl0: gmsl-deserializer@49 {
> +                    compatible = "maxim,max96712";
> +                    reg = <0x49>;
> +                    enable-gpios = <&pca9654_a 0 GPIO_ACTIVE_HIGH>;
> +
> +                    ports {
> +                            #address-cells = <1>;
> +                            #size-cells = <0>;
> +
> +                            port@4 {
> +                                    reg = <4>;
> +                                    max96712_out0: endpoint {
> +                                            clock-lanes = <0>;
> +                                            data-lanes = <1 2 3 4>;
> +                                            remote-endpoint = <&csi40_in>;
> +                                    };
> +                            };
> +                    };
> +            };
> +    };
> -- 
> 2.34.0
>