dt-bindings: display: Separate clock item lists by compatible

So far, the binding and driver have relied on the fact that the H6
clocks are both a prefix and a subset of the R40 clocks. This allows
them to share the clocks/clock-names items and the clock-output-names
order between the hardware variants.

However, the D1 hardware has TCON TV0 and DSI, but no TCON TV1. This
cannot be supported by the existing scheme because it puts a gap in the
middle of the item lists. To prepare for adding D1 support, use separate
lists for variants with different combinations of clocks.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220424162633.12369-2-samuel@sholland.org

Documentation/devicetree/bindings/display/allwinner,sun8i-r40-tcon-top.yaml

@@ -48,31 +48,15 @@ properties:
 
   clocks:
     minItems: 2
-    items:
-      - description: The TCON TOP interface clock
-      - description: The TCON TOP TV0 clock
-      - description: The TCON TOP TVE0 clock
-      - description: The TCON TOP TV1 clock
-      - description: The TCON TOP TVE1 clock
-      - description: The TCON TOP MIPI DSI clock
+    maxItems: 6
 
   clock-names:
     minItems: 2
-    items:
-      - const: bus
-      - const: tcon-tv0
-      - const: tve0
-      - const: tcon-tv1
-      - const: tve1
-      - const: dsi
+    maxItems: 6
 
   clock-output-names:
     minItems: 1
     maxItems: 3
-    description: >
-      The first item is the name of the clock created for the TV0
-      channel, the second item is the name of the TCON TV1 channel
-      clock and the third one is the name of the DSI channel clock.
 
   resets:
     maxItems: 1
@@ -129,32 +113,65 @@ required:
 
 additionalProperties: false
 
-if:
-  properties:
-    compatible:
-      contains:
-        const: allwinner,sun50i-h6-tcon-top
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: allwinner,sun8i-r40-tcon-top
 
-then:
-  properties:
-    clocks:
-      maxItems: 2
+    then:
+      properties:
+        clocks:
+          items:
+            - description: The TCON TOP interface clock
+            - description: The TCON TOP TV0 clock
+            - description: The TCON TOP TVE0 clock
+            - description: The TCON TOP TV1 clock
+            - description: The TCON TOP TVE1 clock
+            - description: The TCON TOP MIPI DSI clock
 
-    clock-output-names:
-      maxItems: 1
+        clock-names:
+          items:
+            - const: bus
+            - const: tcon-tv0
+            - const: tve0
+            - const: tcon-tv1
+            - const: tve1
+            - const: dsi
 
-else:
-  properties:
-    clocks:
-      minItems: 6
+        clock-output-names:
+          items:
+            - description: TCON TV0 output clock name
+            - description: TCON TV1 output clock name
+            - description: DSI output clock name
 
-    clock-output-names:
-      minItems: 3
+        ports:
+          required:
+            - port@2
+            - port@3
 
-    ports:
-      required:
-        - port@2
-        - port@3
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: allwinner,sun50i-h6-tcon-top
+
+    then:
+      properties:
+        clocks:
+          items:
+            - description: The TCON TOP interface clock
+            - description: The TCON TOP TV0 clock
+
+        clock-names:
+          items:
+            - const: bus
+            - const: tcon-tv0
+
+        clock-output-names:
+          items:
+            - description: TCON TV0 output clock name
 
 examples:
   - |