Eliminate warnings for AST2500 and AST2600 EVB devicetrees

[PATCH RFC 09/16] dt-bindings: bus: aspeed: Require syscon for AST2600 AHB controller

Posted by Andrew Jeffery 5 days, 7 hours ago

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>
---
 Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml b/Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml
index 2894256c976d..77e60b32d52e 100644
--- 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>;
     };

-- 
2.47.3

Re: [PATCH RFC 09/16] dt-bindings: bus: aspeed: Require syscon for AST2600 AHB controller

Posted by Rob Herring (Arm) 4 days, 20 hours ago

On Thu, 11 Dec 2025 17:45:51 +0900, Andrew Jeffery wrote:
> 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>
> ---
>  Documentation/devicetree/bindings/bus/aspeed,ast2600-ahbc.yaml | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 

Applied, thanks!