Commit 4fff78dc authored by Konrad Dybcio's avatar Konrad Dybcio Committed by Will Deacon
Browse files

dt-bindings: arm-smmu: Document SM8[45]50 GPU SMMU 



SM8450 and SM8550 both use a Qualcomm-modified MMU500 for their GPU.
In both cases, it requires a set of clocks to be enabled. Describe that.

Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: default avatarKonrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20231127-topic-a7xx_dt-v2-1-2a437588e563@linaro.org


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent fa27b35c

Documentation/devicetree/bindings/iommu/arm,smmu.yaml

+46 −2
Original line number Diff line number Diff line
@@ -91,6 +91,8 @@ properties: 
              - qcom,sm8150-smmu-500

              - qcom,sm8250-smmu-500

              - qcom,sm8350-smmu-500

              - qcom,sm8450-smmu-500

              - qcom,sm8550-smmu-500

          - const: qcom,adreno-smmu

          - const: qcom,smmu-500

          - const: arm,mmu-500
@@ -479,6 +481,50 @@ allOf: 
            - description: Voter clock required for HLOS SMMU access

            - description: Interface clock required for register access



  - if:

      properties:

        compatible:

          const: qcom,sm8450-smmu-500

    then:

      properties:

        clock-names:

          items:

            - const: gmu

            - const: hub

            - const: hlos

            - const: bus

            - const: iface

            - const: ahb



        clocks:

          items:

            - description: GMU clock

            - description: GPU HUB clock

            - description: HLOS vote clock

            - description: GPU memory bus clock

            - description: GPU SNoC bus clock

            - description: GPU AHB clock



  - if:

      properties:

        compatible:

          const: qcom,sm8550-smmu-500

    then:

      properties:

        clock-names:

          items:

            - const: hlos

            - const: bus

            - const: iface

            - const: ahb



        clocks:

          items:

            - description: HLOS vote clock

            - description: GPU memory bus clock

            - description: GPU SNoC bus clock

            - description: GPU AHB clock



  # Disallow clocks for all other platforms with specific compatibles

  - if:

      properties:
@@ -498,8 +544,6 @@ allOf: 
              - qcom,sdx65-smmu-500

              - qcom,sm6350-smmu-500

              - qcom,sm6375-smmu-500

              - qcom,sm8450-smmu-500

              - qcom,sm8550-smmu-500

              - qcom,sm8650-smmu-500

              - qcom,x1e80100-smmu-500

    then: