dt-bindings: clock: stm32mp1: describes clocks if "st,stm32mp1-rcc-secure"

In case of "st,stm32mp1-rcc-secure" (stm32mp1 clock driver with RCC
security support hardened), "clocks" and "clock-names" describe oscillators
and are required.

Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
Reviewed-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/clock/st,stm32mp1-rcc.yaml

@@ -58,14 +58,8 @@ properties:
           - st,stm32mp1-rcc-secure
           - st,stm32mp1-rcc
       - const: syscon
-
-  clocks:
-    description:
-      Specifies the external RX clock for ethernet MAC.
-    maxItems: 1
-
-  clock-names:
-    const: ETH_RX_CLK/ETH_REF_CLK
+  clocks: true
+  clock-names: true
 
   reg:
     maxItems: 1
@@ -76,6 +70,38 @@ required:
   - compatible
   - reg
 
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - st,stm32mp1-rcc-secure
+then:
+  properties:
+    clocks:
+      description: Specifies oscillators.
+      maxItems: 5
+
+    clock-names:
+      items:
+        - const: hse
+        - const: hsi
+        - const: csi
+        - const: lse
+        - const: lsi
+  required:
+    - clocks
+    - clock-names
+else:
+  properties:
+    clocks:
+      description:
+        Specifies the external RX clock for ethernet MAC.
+      maxItems: 1
+
+    clock-names:
+      const: ETH_RX_CLK/ETH_REF_CLK
+
 additionalProperties: false
 
 examples: