[PATCH/RFC] dt-bindings: pci: rcar-pci-ep: Document missing interrupts property

[Geert Uytterhoeven]

The R-Car PCIe controller does not use interrupts when configured
for endpoint mode, hence the bindings do not document the interrupt
property.  However, all DTS files provide interrupts properties, and
thus fail to validate.

Fix this by documenting the interrupts property.

Fixes: 5be478f9c24fbdf8 ("dt-bindings: Another round of adding missing 'additionalProperties'")
Fixes: 4c0f80920923f103 ("dt-bindings: PCI: rcar: Add bindings for R-Car PCIe endpoint controller")
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
Alternatively, the interrupts properties should be removed from the
corresponding device nodes in the DTS files.  Obviously they should be
retained in the device nodes representing PCIe controllers configured in
host mode, which describe the same hardware...
---
 Documentation/devicetree/bindings/pci/rcar-pci-ep.yaml | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/rcar-pci-ep.yaml b/Documentation/devicetree/bindings/pci/rcar-pci-ep.yaml
index fb97f4ea0e63682b..32a3b7665ff5473c 100644
--- a/Documentation/devicetree/bindings/pci/rcar-pci-ep.yaml
+++ b/Documentation/devicetree/bindings/pci/rcar-pci-ep.yaml
@@ -33,6 +33,10 @@ properties:
       - const: memory2
       - const: memory3
 
+  interrupts:
+    minItems: 3
+    maxItems: 3
+
   power-domains:
     maxItems: 1
 
@@ -54,6 +58,7 @@ required:
   - compatible
   - reg
   - reg-names
+  - interrupts
   - resets
   - power-domains
   - clocks
@@ -65,6 +70,7 @@ additionalProperties: false
 examples:
   - |
     #include <dt-bindings/clock/r8a774c0-cpg-mssr.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
     #include <dt-bindings/power/r8a774c0-sysc.h>
 
      pcie0_ep: pcie-ep@fe000000 {
@@ -76,6 +82,9 @@ examples:
                   <0x30000000 0x8000000>,
                   <0x38000000 0x8000000>;
             reg-names = "apb-base", "memory0", "memory1", "memory2", "memory3";
+            interrupts = <GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>;
             resets = <&cpg 319>;
             power-domains = <&sysc R8A774C0_PD_ALWAYS_ON>;
             clocks = <&cpg CPG_MOD 319>;
-- 
2.25.1