[RFC PATCH] dt-bindings: phy: Add Qualcomm MIPI C-/D-PHY schema for CSIPHY IPs

[Conor Dooley]

On Tue, May 13, 2025 at 05:39:18PM +0300, Vladimir Zapolskiy wrote:
> Add dt-binding schema for the CAMSS CSIPHY IPs, which provides
> MIPI C-/D-PHY interfaces on Qualcomm SoCs.
> 
> Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy at linaro.org>

RFC but nothing here about what in particular is RFC about this patch.
What specifically are you looking for comments about?

> ---
>  .../devicetree/bindings/phy/qcom,csiphy.yaml  | 110 ++++++++++++++++++
>  1 file changed, 110 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/qcom,csiphy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/qcom,csiphy.yaml b/Documentation/devicetree/bindings/phy/qcom,csiphy.yaml
> new file mode 100644
> index 000000000000..ef712c5442ec
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/qcom,csiphy.yaml
> @@ -0,0 +1,110 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/qcom,csiphy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm CSI PHY
> +
> +maintainers:
> +  - Vladimir Zapolskiy <vladimir.zapolskiy at linaro.org>
> +
> +description: |
> +  Qualcomm SoCs equipped with a number of MIPI CSI PHY IPs, which
> +  supports D-PHY or C-PHY interfaces to camera sensors.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,sm8250-csiphy
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 2
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  vdda-csi-0p9-supply:
> +    description: Voltage supply, 0.9V
> +
> +  vdda-csi-1p2-supply:
> +    description: Voltage supply, 1.2V
> +
> +  '#phy-cells':
> +    const: 0
> +
> +  port:
> +    $ref: /schemas/graph.yaml#/$defs/port-base
> +    description: CAMSS CSIPHY input port
> +
> +    patternProperties:
> +      "^endpoint@[0-1]$":
> +        $ref: /schemas/media/video-interfaces.yaml#
> +        unevaluatedProperties: false
> +
> +        properties:
> +          data-lanes:
> +            minItems: 1
> +            maxItems: 4
> +
> +          bus-type:
> +            enum:
> +              - 1 # MEDIA_BUS_TYPE_CSI2_CPHY
> +              - 4 # MEDIA_BUS_TYPE_CSI2_DPHY
> +
> +        required:
> +          - data-lanes
> +
> +    oneOf:
> +      - required:
> +          - endpoint
> +      - required:
> +          - endpoint at 0
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - interrupts
> +  - '#phy-cells'
> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - qcom,sm8250-csiphy
> +    then:
> +      required:
> +        - vdda-csi-0p9-supply
> +        - vdda-csi-1p2-supply
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,camcc-sm8250.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    phy at ac6e000 {
> +      compatible = "qcom,sm8250-csiphy";
> +      reg = <0x0ac6e000 0x1000>;
> +      clocks = <&camcc CAM_CC_CSIPHY2_CLK>,
> +               <&camcc CAM_CC_CSI2PHYTIMER_CLK>;
> +      interrupts = <GIC_SPI 479 IRQ_TYPE_EDGE_RISING>;
> +      vdda-csi-0p9-supply = <&vreg_l5a_0p88>;
> +      vdda-csi-1p2-supply = <&vreg_l9a_1p2>;
> +      #phy-cells = <0>;
> +
> +      port {
> +        csiphy_in: endpoint {
> +          data-lanes = <1 2 3 4>;
> +          remote-endpoint = <&sensor_out>;
> +        };
> +      };
> +    };
> -- 
> 2.45.2
> 
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