[PATCH v3 2/4] dt-bindings: PCI: mediatek,mt7621: add missing child node reg

[Krzysztof Kozlowski]

MT7621 PCI host bridge has children which are PCI root ports.  The
children have "reg" property, but do not explicitly define it.  Instead
they rely on pci-bus.yaml schema, but that one has "reg" without any
constraints.

Define the "reg" for the children, so the binding will be more specific
and later will allow dropping reference to deprecated pci-bus.yaml
schema.

Acked-by: Sergio Paracuellos <sergio.paracuellos at gmail.com>
Acked-by: Rob Herring <robh at kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>

---

Changes in v3:
1. Correct commit msg (root port).

Changes in v2:
1. Add tags.
---
 .../devicetree/bindings/pci/mediatek,mt7621-pcie.yaml          | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml b/Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml
index e63e6458cea8..61d027239910 100644
--- a/Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml
@@ -36,6 +36,9 @@ patternProperties:
     $ref: /schemas/pci/pci-bus.yaml#
 
     properties:
+      reg:
+        maxItems: 1
+
       resets:
         maxItems: 1
 
-- 
2.34.1