dt-bindings: usb: ci-hdrc-usb2: allow up to 3 clocks for qcom,ci-hdrc

Some Qualcomm SoCs such as apq8064 and msm8960 require a third "fs"
clock in addition to "iface" and "core", needed to propagate resets
through the controller and wrapper logic. Later SoCs such as msm8974
dropped this requirement and only use two clocks.

Note that the existing apq8064 and msm8960 DTS files currently specify
the "iface" and "core" clocks in reverse order compared to most newer
SoCs DTS, which causes dtbs_check warnings for these older SoCs. The
dependent patch series will fix that clock ordering.

Signed-off-by: Antony Kurniawan Soemardi <linux@smankusors.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260516-qcom-ci-hdrc-clock-fix-v2-1-aaec8d33d0aa@smankusors.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml

@@ -45,11 +45,11 @@ properties:
 
   clocks:
     minItems: 1
-    maxItems: 2
+    maxItems: 3
 
   clock-names:
     minItems: 1
-    maxItems: 2
+    maxItems: 3
 
   operating-points-v2:
     description: A phandle to the OPP table containing the performance states.
@@ -91,6 +91,27 @@ allOf:
   - $ref: chipidea,usb2-common.yaml#
   - $ref: usb-hcd.yaml#
   - $ref: usb-drd.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,ci-hdrc
+    then:
+      properties:
+        clocks:
+          minItems: 2
+        clock-names:
+          minItems: 2
+          items:
+            - const: iface
+            - const: core
+            - const: fs
+    else:
+      properties:
+        clocks:
+          maxItems: 2
+        clock-names:
+          maxItems: 2
 
 unevaluatedProperties: false