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This 'reg' is only >> used to describe an optional memory-mapped debug-messages region. >> >> Some controllers may not implement this debug region, so it has no 'reg' > Which ones? TDA54 PDM System Controller. I will add this in the commit message in patch revision. > >> and unit address. Therefore, relax the $nodename pattern to allow the >> unit address to be omitted for such controllers. Keep the unit address >> mandatory for the existing ti,k2g-sci and ti,am654-sci controllers. >> >> Signed-off-by: Beleswar Padhi >> --- >> Note: This patch is independent can be applied directly. >> >> Cc: Nishanth Menon >> Cc: Tero Kristo >> Cc: Santosh Shilimkar >> Cc: Rob Herring >> Cc: Krzysztof Kozlowski >> Cc: Conor Dooley >> Cc: linux-arm-kernel@lists.infradead.org >> Cc: devicetree@vger.kernel.org >> Cc: linux-kernel@vger.kernel.org >> >> .../devicetree/bindings/arm/keystone/ti,sci.yaml | 15 ++++++++++++++- >> 1 file changed, 14 insertions(+), 1 deletion(-) >> >> diff --git a/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml b/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml >> index 25a2b42105e54..67acce8a559a1 100644 >> --- a/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml >> +++ b/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml >> @@ -30,7 +30,7 @@ description: | >> >> properties: >> $nodename: >> - pattern: "^system-controller@[0-9a-f]+$" >> + pattern: "^system-controller(@[0-9a-f]+)?$" >> >> compatible: >> oneOf: >> @@ -84,6 +84,19 @@ required: >> - mbox-names >> - mboxes >> >> +allOf: >> + - if: >> + properties: >> + compatible: >> + contains: >> + enum: >> + - ti,k2g-sci >> + - ti,am654-sci >> + then: >> + properties: >> + $nodename: >> + pattern: "^system-controller@[0-9a-f]+$" > Drop, not worth complexity. Why? We want to make sure dt_binding_check catches system controller nodes which have a debug region but omit the unit address. Thanks, Beleswar > > Best regards, > Krzysztof