[PATCH v3 2/8] dt-bindings: PCI: qcom-ep: describe optional IOMMU

[Dmitry Baryshkov]

Some of Qualcomm platforms have an IOMMU unit between the PCIe IP and
DDR. For example, SA8775P specifies the iommu alththough it is not a
part of bindings. Change the schema in order to require the IOMMU for
SA8775P and forbid it from being used on SDX55 (SM8450 will be handled
in a later patch).

This fixes the following warning:

pcie-ep@1c10000: Unevaluated properties are not allowed ('iommus' was unexpected)

Fixes: 9d3d5e75f31c ("dt-bindings: PCI: qcom-ep: Add support for SA8775P SoC")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
index 0c2ca4cfa3b190b3fb204f0d7142370734fb3534..6075361348352bb8d607acecc76189e28b03dc5b 100644
--- a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
+++ b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
@@ -75,6 +75,9 @@ properties:
       - const: doorbell
       - const: dma
 
+  iommus:
+    maxItems: 1
+
   reset-gpios:
     description: GPIO used as PERST# input signal
     maxItems: 1
@@ -162,6 +165,7 @@ allOf:
           maxItems: 2
         interrupt-names:
           maxItems: 2
+        iommus: false
 
   - if:
       properties:
@@ -234,6 +238,8 @@ allOf:
         interrupt-names:
           minItems: 3
           maxItems: 3
+      required:
+        - iommus
 
 unevaluatedProperties: false
 

-- 
2.39.5