dt-bindings: phy: qcom,ipq8074-qmp-pcie: document IPQ9650 QMP PCIe PHYs

Document the single-lane and dual-lane QMP PCIe PHYs found on the
IPQ9650 SoC.

Unlike the PHYs in the other supported IPQ SoCs, the IPQ9650 PHYs require
the on-chip refgen supply to power up. Add the refgen-supply property
and require it only for the IPQ9650 compatibles.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
Link: https://patch.msgid.link/20260710-ipq9650_pcie_phy-v3-1-ef6018818d33@oss.qualcomm.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/qcom,ipq8074-qmp-pcie-phy.yaml

@@ -23,6 +23,8 @@ properties:
           - qcom,ipq8074-qmp-pcie-phy
           - qcom,ipq9574-qmp-gen3x1-pcie-phy
           - qcom,ipq9574-qmp-gen3x2-pcie-phy
+          - qcom,ipq9650-qmp-gen3x1-pcie-phy
+          - qcom,ipq9650-qmp-gen3x2-pcie-phy
       - items:
           - enum:
               - qcom,ipq5424-qmp-gen3x1-pcie-phy
@@ -63,6 +65,8 @@ properties:
   "#phy-cells":
     const: 0
 
+  refgen-supply: true
+
 required:
   - compatible
   - reg
@@ -74,6 +78,21 @@ required:
   - clock-output-names
   - "#phy-cells"
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,ipq9650-qmp-gen3x1-pcie-phy
+              - qcom,ipq9650-qmp-gen3x2-pcie-phy
+    then:
+      required:
+        - refgen-supply
+    else:
+      properties:
+        refgen-supply: false
+
 additionalProperties: false
 
 examples: