[PATCH v3 1/3] dt-bindings: PCI: imx6q-pcie: Add intr, aer and pme interrupts

[Richard Zhu <hongxing.zhu@nxp.com>]

Add 'intr', 'aer', and 'pme' interrupt entries to the i.MX6Q PCIe binding
to support PCIe event-based interrupts for general controller events,
Advanced Error Reporting, and Power Management Events respectively.

These interrupts are optional for existing variants (imx6q, imx6sx, imx6qp,
imx7d, imx8mq, imx8mm, imx8mp) to maintain backward compatibility with
existing device trees.

For fsl,imx95-pcie, all 5 interrupts (msi, dma, intr, aer, pme) are
mandatory due to hardware requirements.

This introduces an ABI requirement for fsl,imx95-pcie. The i.MX95 hardware
requires dedicated interrupt lines for AER, PME, and general controller
events due to its redesigned interrupt architecture. i.MX95 cannot
function correctly without explicit interrupt routing for error handling,
power management and link event detection.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
---
 .../bindings/pci/fsl,imx6q-pcie.yaml          | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
index 9d1349855b422..97bbfc5238a20 100644
--- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
@@ -58,12 +58,18 @@ properties:
     items:
       - description: builtin MSI controller.
       - description: builtin DMA controller.
+      - description: PCIe event interrupt.
+      - description: builtin AER SPI standalone interrupt line.
+      - description: builtin PME SPI standalone interrupt line.
 
   interrupt-names:
     minItems: 1
     items:
       - const: msi
       - const: dma
+      - const: intr
+      - const: aer
+      - const: pme
 
   reset-gpio:
     description: Should specify the GPIO for controlling the PCI bus device
@@ -231,6 +237,30 @@ allOf:
             - const: ref
             - const: extref  # Optional
 
+        interrupts:
+          minItems: 5
+        interrupt-names:
+          minItems: 5
+
+  - if:
+      properties:
+        compatible:
+          enum:
+            - fsl,imx6q-pcie
+            - fsl,imx6sx-pcie
+            - fsl,imx6qp-pcie
+            - fsl,imx7d-pcie
+            - fsl,imx8mm-pcie
+            - fsl,imx8mp-pcie
+            - fsl,imx8mq-pcie
+            - fsl,imx8q-pcie
+    then:
+      properties:
+        interrupts:
+          maxItems: 2
+        interrupt-names:
+          maxItems: 2
+
 unevaluatedProperties: false
 
 examples:
-- 
2.37.1