[PATCH 03/11] dt-bindings: PCI: rcar-gen4: Add optional "aer" interrupt

[Koichiro Den <den@valinux.co.jp>]

The intreq_pcim_lperr interrupt carries Root Port AER notifications,
separately from the integrated MSI receiver interrupt. Describe it with
the "aer" name so the controller driver can use it for Root Port error
reporting.

Keep the fifth interrupt optional so existing device trees remain
valid. Extend the example accordingly.

Signed-off-by: Koichiro Den <den@valinux.co.jp>
---
 .../devicetree/bindings/pci/rcar-gen4-pci-host.yaml    | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml b/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
index 64f456c6a75a..b0f4e6e6a662 100644
--- a/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
+++ b/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
@@ -36,14 +36,17 @@ properties:
       - const: config
 
   interrupts:
-    maxItems: 4
+    minItems: 4
+    maxItems: 5
 
   interrupt-names:
+    minItems: 4
     items:
       - const: msi
       - const: dma
       - const: sft_ce
       - const: app
+      - const: aer
 
   clocks:
     maxItems: 2
@@ -106,8 +109,9 @@ examples:
             interrupts = <GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>,
                          <GIC_SPI 417 IRQ_TYPE_LEVEL_HIGH>,
                          <GIC_SPI 418 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 422 IRQ_TYPE_LEVEL_HIGH>;
-            interrupt-names = "msi", "dma", "sft_ce", "app";
+                         <GIC_SPI 422 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 421 IRQ_TYPE_LEVEL_HIGH>;
+            interrupt-names = "msi", "dma", "sft_ce", "app", "aer";
             clocks = <&cpg CPG_MOD 624>, <&pcie0_clkref>;
             clock-names = "core", "ref";
             power-domains = <&sysc R8A779F0_PD_ALWAYS_ON>;
-- 
2.51.0