Re: [PATCH v3 13/14] dt-bindings: iommu: rockchip: Add Rockchip RK3588

[Heiko Stübner]

Hi Andy,

Am Donnerstag, 30. November 2023, 13:25:00 CET schrieb Andy Yan:
> From: Andy Yan <andy.yan@xxxxxxxxxxxxxx>
> 
> Add a Rockchip RK3588 compatible
> 
> Signed-off-by: Andy Yan <andy.yan@xxxxxxxxxxxxxx>
> ---
> 
> (no changes since v1)
> 
>  Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml b/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml
> index ba9124f721f1..3febf0c3c404 100644
> --- a/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml
> +++ b/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml
> @@ -22,6 +22,7 @@ properties:
>      enum:
>        - rockchip,iommu
>        - rockchip,rk3568-iommu
> +      - rockchip,rk3588-iommu

This enum only allows that the compatible has one element, namely one of
those listed here. In the dts though you declare
	compatible = "rockchip,rk3588-iommu", "rockchip,rk3568-iommu";
meaning that the rk3588-iommu is compatible to the rk3568-iommu

I think you'll need a construct like:

properties:
  compatible:
    oneOf:
      - enum:
          - rockchip,iommu
          - rockchip,rk3568-iommu
      - items:
          - enum:
              - rockchip,rk3588-iommu
          - const: rockchip,rk3568-iommu

to describe both the single-compatibles and the 2-item compatible for the
rk3588. For example pci/rockchip-dw-pcie.yaml does a similar thing already.

Heiko