[PATCH v2 1/5] dt-bindings: dma: ti: k3-bcdma: Add bindings for BCDMA CSI RX

[Krzysztof Kozlowski]

On 12/12/2022 11:54, Vignesh Raghavendra wrote:
> AM62A SoC has a dedicated BCDMA that serves Camera Serial Interface
> (CSI) IP. Add new compatible for the same. Unlike system
> BCDMA, this instance only has RX DMA channels and lack TX or block copy
> channel. Thus make those properties optional. Additionally CSI RX has
> independent power domain, add the binding for the same.
> 
> Signed-off-by: Vignesh Raghavendra <vigneshr at ti.com>
> ---
> 
> v2:
> reorder compatibles alphabetically
> Fix reg defintion to min 3 and max 5
> Keep top level constraints as is  and further restrict
> variants within "if-else" blocks
> 
>  .../devicetree/bindings/dma/ti/k3-bcdma.yaml  | 67 ++++++++++++++-----
>  1 file changed, 49 insertions(+), 18 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml b/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
> index 08627d91e607..86e8bebce3f2 100644
> --- a/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
> +++ b/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
> @@ -28,13 +28,15 @@ description: |
>    PDMAs can be configured via BCDMA split channel's peer registers to match with
>    the configuration of the legacy peripheral.
>  
> -allOf:
> -  - $ref: /schemas/dma/dma-controller.yaml#
> -  - $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml#
> -
>  properties:
>    compatible:
> -    const: ti,am64-dmss-bcdma
> +    enum:
> +      - ti,am62a-dmss-bcdma-csirx
> +      - ti,am64-dmss-bcdma
> +
> +  reg:
> +    minItems: 3
> +    maxItems: 5
>  
>    "#dma-cells":
>      const: 3
> @@ -65,19 +67,13 @@ properties:
>  
>        cell 3: ASEL value for the channel
>  
> -  reg:
> -    maxItems: 5
> -
> -  reg-names:
> -    items:

reg-names with min/max items should also stay.

> -      - const: gcfg
> -      - const: bchanrt
> -      - const: rchanrt
> -      - const: tchanrt
> -      - const: ringrt
> -
>    msi-parent: true
>  
> +  power-domains:
> +    description:
> +      Power domain if available
> +    maxItems: 1
> +
>    ti,asel:
>      $ref: /schemas/types.yaml#/definitions/uint32
>      description: ASEL value for non slave channels
> @@ -123,10 +119,45 @@ required:
>    - msi-parent
>    - ti,sci
>    - ti,sci-dev-id
> -  - ti,sci-rm-range-bchan
> -  - ti,sci-rm-range-tchan
>    - ti,sci-rm-range-rchan
>  
> +allOf:
> +  - $ref: /schemas/dma/dma-controller.yaml#
> +  - $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml#
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: ti,am62a-dmss-bcdma-csirx
> +    then:
> +      properties:
> +        ti,sci-rm-range-bchan: false
> +        ti,sci-rm-range-tchan: false
> +

missing constraints for reg

> +        reg-names:
> +          items:
> +            - const: gcfg
> +            - const: rchanrt
> +            - const: ringrt
> +
> +      required:
> +        - power-domains
> +
> +    else:
> +      properties:

missing constraints for reg

> +        reg-names:
> +          items:
> +            - const: gcfg
> +            - const: bchanrt
> +            - const: rchanrt
> +            - const: tchanrt
> +            - const: ringrt
> +
> +      required:
> +        - ti,sci-rm-range-bchan
> +        - ti,sci-rm-range-tchan
> +
>  unevaluatedProperties: false
>  
>  examples:

Best regards,
Krzysztof