dt-bindings: bus: aspeed: Require syscon for AST2600 AHB controller

The AST2600's ACRY (eliptic curve and RSA crypto engine) requires access
to configuration exposed by the AHB controller. The devicetree already
describes the AHB controller node as a syscon, so require this in the
binding to satisfy the ACRY relationship.

Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Link: https://patch.msgid.link/20251211-dev-dt-warnings-all-v1-9-21b18b9ada77@codeconstruct.com.au
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml b/Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml
index 2894256c976dbe9f3ff4f53a48cff190724b7fb5..77e60b32d52e693e2b8237dae8574acd13253308 100644 (file)
--- a/Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml
+++ b/Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml
@@ -17,8 +17,10 @@ description: |
 
 properties:
   compatible:
-    enum:
-      - aspeed,ast2600-ahbc
+    items:
+      - enum:
+          - aspeed,ast2600-ahbc
+      - const: syscon
 
   reg:
     maxItems: 1
@@ -32,6 +34,6 @@ additionalProperties: false
 examples:
   - |
     ahbc@1e600000 {
-        compatible = "aspeed,ast2600-ahbc";
+        compatible = "aspeed,ast2600-ahbc", "syscon";
         reg = <0x1e600000 0x100>;
     };