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

[Krzysztof Kozlowski]

On 13/05/2025 16:39, 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>
> ---
>  .../devicetree/bindings/phy/qcom,csiphy.yaml  | 110 ++++++++++++++++++
>  1 file changed, 110 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/qcom,csiphy.yaml


Looks like not tested, so limited review follows.

Filename matching compatible.

> 
> 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

Please post the driver or any other user. Or explain why this is RFC or
what you expect here from us.


> @@ -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

SM8250 ?

> +
> +maintainers:
> +  - Vladimir Zapolskiy <vladimir.zapolskiy at linaro.org>
> +
> +description: |

Do not need '|' unless you need to preserve formatting.

> +  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

Need to list the items instead

> +
> +  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]$":

Keep consistent quotes, either " or '

> +        $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

This makes no sense - it is only sm8250 - so this if is always true.


Best regards,
Krzysztof