[PATCH 1/6] dt-bindings: PCI: qcom-ep: describe optional IOMMU

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

Platforms which use eDMA for PCIe EP transfers (like SA8775P) also use
IOMMU in order to setup transfer windows. Fix the schema in order to
allow specifying the IOMMU.

Fixes: 9d3d5e75f31c ("dt-bindings: PCI: qcom-ep: Add support for SA8775P SoC")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
index 1226ee5d08d1ae909b07b0d78014618c4c74e9a8..800accdf5947e7178ad80f0759cf53111be1a814 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
@@ -233,6 +236,20 @@ allOf:
           minItems: 3
           maxItems: 3
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,sdx55-pcie-ep
+    then:
+      properties:
+        iommus:
+          false
+
+    else:
+      required:
+        - iommus
+
 unevaluatedProperties: false
 
 examples:

-- 
2.39.5