linux-kernel - [PATCH v2 1/6] dt-bindings: PCI: qcom-ep: describe optional IOMMU

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Message-Id: <20250221-sar2130p-pci-v2-1-cc87590ffbeb@linaro.org>
Date: Fri, 21 Feb 2025 05:06:00 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kw@...ux.com>, 
 Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Mrinmay Sarkar <quic_msarkar@...cinc.com>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>
Cc: Krzysztof Wilczyński <kwilczynski@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, 
 linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/6] dt-bindings: PCI: qcom-ep: describe optional IOMMU

Some of Qualcomm platforms have an IOMMU unit between the PCIe IP and
DDR. Changethe 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@...aro.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