regulator: dt-bindings: describe the PMU module of the WCN7850 package

The WCN7850 package contains discrete modules for WLAN and Bluetooth. They
are powered by the Power Management Unit (PMU) that takes inputs from the
host and provides LDO outputs. Extend the bindings for QCA6390 to also
document this model.

Acked-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://msgid.link/r/20240605121450.23697-3-brgl@bgdev.pl
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/qcom,qca6390-pmu.yaml

@@ -16,20 +16,37 @@ description:
 
 properties:
   compatible:
-    const: qcom,qca6390-pmu
+    enum:
+      - qcom,qca6390-pmu
+      - qcom,wcn7850-pmu
+
+  vdd-supply:
+    description: VDD supply regulator handle
 
   vddaon-supply:
     description: VDD_AON supply regulator handle
 
+  vdddig-supply:
+    description: VDD_DIG supply regulator handle
+
   vddpmu-supply:
     description: VDD_PMU supply regulator handle
 
+  vddio1p2-supply:
+    description: VDD_IO_1P2 supply regulator handle
+
   vddrfa0p95-supply:
     description: VDD_RFA_0P95 supply regulator handle
 
+  vddrfa1p2-supply:
+    description: VDD_RFA_1P2 supply regulator handle
+
   vddrfa1p3-supply:
     description: VDD_RFA_1P3 supply regulator handle
 
+  vddrfa1p8-supply:
+    description: VDD_RFA_1P8 supply regulator handle
+
   vddrfa1p9-supply:
     description: VDD_RFA_1P9 supply regulator handle
 
@@ -50,6 +67,10 @@ properties:
     maxItems: 1
     description: GPIO line enabling the ATH11K Bluetooth module supplied by the PMU
 
+  clocks:
+    maxItems: 1
+    description: Reference clock handle
+
   regulators:
     type: object
     description:
@@ -83,6 +104,19 @@ allOf:
         - vddpcie1p3-supply
         - vddpcie1p9-supply
         - vddio-supply
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,wcn7850-pmu
+    then:
+      required:
+        - vdd-supply
+        - vddio-supply
+        - vddaon-supply
+        - vdddig-supply
+        - vddrfa1p2-supply
+        - vddrfa1p8-supply
 
 additionalProperties: false