dt-bindings: arm-smmu: add special case for Google Cheza platform

Cheza fw does not properly program the GPU aperture to allow the
GPU to update the SMMU pagetables for context switches. The board file
works around this by dropping the "qcom,adreno-smmu" compat string.
Add this usecase to arm,smmu.yaml schema.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20221114170635.1406534-4-dmitry.baryshkov@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
index 99f34a40cfe2058f16df8c27456c98cae27c5358..29a8b3ff8fa002595682531e6ecb8aeea4eb9a3d 100644 (file)
--- a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
+++ b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
@@ -69,6 +69,10 @@ properties:
               - qcom,sdm845-smmu-v2
           - const: qcom,adreno-smmu
           - const: qcom,smmu-v2
+      - description: Qcom Adreno GPUs on Google Cheza platform
+        items:
+          - const: qcom,sdm845-smmu-v2
+          - const: qcom,smmu-v2
       - description: Marvell SoCs implementing "arm,mmu-500"
         items:
           - const: marvell,ap806-smmu-500