[PATCH v4 1/3] dt-bindings: phy: sc8280xp-qmp-pcie: Add vdda-refgen supply for Glymur

[Qiang Yu <qiang.yu@oss.qualcomm.com>]

The PCIe QMP PHYs require a stable reference voltage provided by REFGEN,
which in turn requires two separate LDOs to operate. Without these
supplies, the PCIe PHY cannot work properly.

Add vdda-refgen0p9-supply and vdda-refgen1p2-supply properties. Mark them
as required for the Glymur PCIe QMP PHYs for now, even though it breaks
ABI; other platforms having the same requirement can be added later.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Qiang Yu <qiang.yu@oss.qualcomm.com>
---
 .../bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml         | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml
index c0a3e1f160ad..f827abaf22ef 100644
--- a/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml
@@ -104,6 +104,10 @@ properties:
 
   vdda-qref-supply: true
 
+  vdda-refgen0p9-supply: true
+
+  vdda-refgen1p2-supply: true
+
   qcom,4ln-config-sel:
     description: PCIe 4-lane configuration
     $ref: /schemas/types.yaml#/definitions/phandle-array
@@ -280,6 +284,18 @@ allOf:
         "#clock-cells":
           const: 0
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,glymur-qmp-gen4x2-pcie-phy
+              - qcom,glymur-qmp-gen5x4-pcie-phy
+    then:
+      required:
+        - vdda-refgen0p9-supply
+        - vdda-refgen1p2-supply
+
 examples:
   - |
     #include <dt-bindings/clock/qcom,gcc-sc8280xp.h>

-- 
2.34.1