Re: [PATCH v3 05/14] dt-bindings: fsi: Document the IBM SBEFIFO engine

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On 4/26/24 01:20, Krzysztof Kozlowski wrote:
On 25/04/2024 23:36, Eddie James wrote:
The SBEFIFO engine provides an interface to the POWER processor
Self Boot Engine (SBE).

Signed-off-by: Eddie James <eajames@xxxxxxxxxxxxx>
Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Reviewed-by: Andrew Jeffery <andrew@xxxxxxxxxxxxxxxxxxxx>
---

+description:
+  The SBEFIFO is an FSI CFAM engine that provides an interface to the
+  POWER processor Self Boot Engine (SBE). This node will always be a child
+  of an FSI CFAM node; see fsi.txt for details on FSI slave and CFAM
+  nodes.
+
+properties:
+  compatible:
+    enum:
+      - ibm,p9-sbefifo
+      - ibm,odyssey-sbefifo
+
+  reg:
+    items:
+      - description: FSI slave address
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^occ(@.*)?":
Why unit address is optional?


In this case, it's because we use the reg property (reflecting the unit address) to indicate the processor index of the occ node. However I think I should drop the unit address here, it's meaningless, there is no addressing for the OCC from the SBEFIFO.





Best regards,
Krzysztof





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