linux-kernel - [PATCH v3 1/8] dt-bindings: PCI: qcom-ep: describe optional dma-coherent property

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Message-Id: <20250221-sar2130p-pci-v3-1-61a0fdfb75b4@linaro.org>
Date: Fri, 21 Feb 2025 17:51:59 +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 v3 1/8] dt-bindings: PCI: qcom-ep: describe optional
 dma-coherent property

Qualcomm SA8775P supports cache coherency on the PCIe EP controller.
Allow 'dma-coherent' property to be used for this device. This fixes
a part of the following error (the second part is fixed in the next
commit):

pcie-ep@...0000: Unevaluated properties are not allowed ('dma-coherent', 'iommus' were unexpected)

Fixes: 4b220c6fa9f3 ("arm64: dts: qcom: sa8775p: Mark PCIe EP controller as cache coherent")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
index 1226ee5d08d1ae909b07b0d78014618c4c74e9a8..0c2ca4cfa3b190b3fb204f0d7142370734fb3534 100644
--- a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
+++ b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
@@ -91,6 +91,8 @@ properties:
       - const: pcie-mem
       - const: cpu-pcie
 
+  dma-coherent: true
+
   resets:
     maxItems: 1
 

-- 
2.39.5