[PATCH 1/3] dt-bindings: arm-smmu: Add interconnect for qcom SMMUs

[Parikshit Pareek <quic_ppareek@xxxxxxxxxxx>]

There are certain SMMUs on qcom SoCs, which need to set interconnect-
bandwidth, before accessing any MIMO mapped HW registers, and accessing
RAM during page table walk. Hence introduce the due bindings for
interconnects.

Reported-by: Eric Chanudet <echanude@xxxxxxxxxx>
Signed-off-by: Parikshit Pareek <quic_ppareek@xxxxxxxxxxx>
---
 .../devicetree/bindings/iommu/arm,smmu.yaml   | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
index ba677d401e24..75e00789d8c2 100644
--- a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
+++ b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml
@@ -327,6 +327,28 @@ allOf:
             - description: interface clock required to access smmu's registers
                 through the TCU's programming interface.
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              qcom,sa8775p-smmu-500
+    then:
+      properties:
+        interconnects:
+          minItems: 1
+          maxItems: 1
+
+        interconnect-names:
+          minItems: 1
+          items:
+            - const: tbu_mc
+
+        icc_bw:
+          $ref: /schemas/types.yaml#/definitions/int32
+          description:
+            An integer expressing the interconnect bandwidth(MBps) to be set.
+
   - if:
       properties:
         compatible:
-- 
2.17.1