[PATCH] dt-bindings: pci: brcmstb: Add rp1-nexus node to fix DTC warning

[Andrea della Porta]

The devicetree compiler is complaining as follows:

arch/arm64/boot/dts/broadcom/rp1-nexus.dtsi:3.11-14.3: Warning (unit_address_vs_reg): /axi/pcie at 1000120000/rp1_nexus: node has a reg or ranges property, but no unit name
/home/andrea/linux-torvalds/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dtb: pcie at 1000120000: Unevaluated properties are not allowed ('rp1_nexus' was unexpected)

Add the optional node that fix this to the DT binding.

Reported-by: kernel test robot <lkp at intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202506041952.baJDYBT4-lkp@intel.com/
Signed-off-by: Andrea della Porta <andrea.porta at suse.com>
---
 Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
index 812ef5957cfc..7d8ba920b652 100644
--- a/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
@@ -126,6 +126,15 @@ required:
 allOf:
   - $ref: /schemas/pci/pci-host-bridge.yaml#
   - $ref: /schemas/interrupt-controller/msi-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: brcm,bcm2712-pcie
+    then:
+      properties:
+        rp1_nexus:
+          $ref: /schemas/misc/pci1de4,1.yaml
   - if:
       properties:
         compatible:
-- 
2.35.3