linux-kernel - [PATCH v3 11/13] dt-bindings: PCI: qcom,pcie-sm8450: Add 'global' interrupt

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Message-Id: <20240731-pci-qcom-hotplug-v3-11-a1426afdee3b@linaro.org>
Date: Wed, 31 Jul 2024 16:20:14 +0530
From: Manivannan Sadhasivam via B4 Relay <devnull+manivannan.sadhasivam.linaro.org@...nel.org>
To: 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>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH v3 11/13] dt-bindings: PCI: qcom,pcie-sm8450: Add 'global'
 interrupt

From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Qcom PCIe RC controllers are capable of generating 'global' SPI interrupt
to the host CPU. This interrupt can be used by the device driver to
identify events such as PCIe link specific events, safety events, etc...

Hence, document it in the binding along with the existing MSI interrupts.
Though adding a new interrupt will break the ABI, it is required to
accurately describe the hardware.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 Documentation/devicetree/bindings/pci/qcom,pcie-sm8450.yaml | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie-sm8450.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie-sm8450.yaml
index d8c0afaa4b19..46bd59eefadb 100644
--- a/Documentation/devicetree/bindings/pci/qcom,pcie-sm8450.yaml
+++ b/Documentation/devicetree/bindings/pci/qcom,pcie-sm8450.yaml
@@ -55,8 +55,8 @@ properties:
       - const: aggre1 # Aggre NoC PCIe1 AXI clock
 
   interrupts:
-    minItems: 8
-    maxItems: 8
+    minItems: 9
+    maxItems: 9
 
   interrupt-names:
     items:
@@ -68,6 +68,7 @@ properties:
       - const: msi5
       - const: msi6
       - const: msi7
+      - const: global
 
   operating-points-v2: true
   opp-table:
@@ -149,9 +150,10 @@ examples:
                          <GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>,
                          <GIC_SPI 146 IRQ_TYPE_LEVEL_HIGH>,
                          <GIC_SPI 147 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;
+                         <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>;
             interrupt-names = "msi0", "msi1", "msi2", "msi3",
-                              "msi4", "msi5", "msi6", "msi7";
+                              "msi4", "msi5", "msi6", "msi7", "global";
             #interrupt-cells = <1>;
             interrupt-map-mask = <0 0 0 0x7>;
             interrupt-map = <0 0 0 1 &intc 0 0 0 149 IRQ_TYPE_LEVEL_HIGH>, /* int_a */

-- 
2.25.1