[PATCH v2 03/15] 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.

Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Signed-off-by: Koichiro Den <den@valinux.co.jp>
---
Changes in v2:
  - Add Marek's Reviewed-by tag. No code changes.

 .../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 30e244fda56b..aa5876f32121 100644
--- a/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
+++ b/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
@@ -26,14 +26,17 @@ properties:
           - const: renesas,rcar-gen5-pcie4 # R-Car Gen5 PCIe4
 
   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
@@ -140,8 +143,9 @@ 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