Re: [PATCH v9 03/15] dt-bindings: spi: cdns: Add compatible for AMD Pensando Elba SoC

[Brad Larson <blarson@amd.com>]

On 19/01/2023 7:53 UTC, Krzysztof Kozlowski wrote:
>On 19/01/2023 04:51, Brad Larson wrote:
>> Document the cadence qspi controller compatible for AMD Pensando
>> Elba SoC boards.  The Elba qspi fifo size is 1024.
>> 
...
>> diff --git a/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml b/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml
>> index 4707294d8f59..a6556854234f 100644
>> --- a/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml
>> +++ b/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml
>> @@ -20,11 +20,23 @@ allOf:
>>        required:
>>          - power-domains
>>  
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          enum:
>> +            - amd,pensando-elba-qspi
>> +    then:
>> +      properties:
>> +        cdns,fifo-depth:
>> +          enum: [ 128, 256, 1024 ]
>> +          default: 1024
>
>This won't work either... did you test it? Is 1024 really allowed?

Removing enum/default from the cdns,fifo-depth property definition
and using if/then/else in the allOf block fixed the problem.

Yes the Cadence IP 1024 fifo-size is supported and is in production.
The below passes the dtbs_check/dt_binding_check and leaves all
other implemenations with max 256 fifo-depth.

Do you want to move the allOf block to the bottom as was requested
for cdns,sdhci.yaml?  This is the updated diff:

--- a/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml
+++ b/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml
@@ -20,11 +20,28 @@ allOf:
       required:
         - power-domains
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: amd,pensando-elba-qspi
+    then:
+      properties:
+        cdns,fifo-depth:
+          enum: [ 128, 256, 1024 ]
+          default: 1024
+    else:
+      properties:
+        cdns,fifo-depth:
+          enum: [ 128, 256 ]
+          default: 128
+
 properties:
   compatible:
     oneOf:
       - items:
           - enum:
+              - amd,pensando-elba-qspi
               - ti,k2g-qspi
               - ti,am654-ospi
               - intel,lgm-qspi
@@ -48,8 +65,6 @@ properties:
     description:
       Size of the data FIFO in words.
     $ref: "/schemas/types.yaml#/definitions/uint32"
-    enum: [ 128, 256 ]
-    default: 128
 
   cdns,fifo-width:
     $ref: /schemas/types.yaml#/definitions/uint32

Regards,
Brad