linux-kernel - [PATCH 01/11] dt-bindings: document access-controllers property for coresight peripherals

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Message-ID: <20260109-debug_bus-v1-1-8f2142b5a738@foss.st.com>
Date: Fri, 9 Jan 2026 11:55:01 +0100
From: Gatien Chevallier <gatien.chevallier@...s.st.com>
To: Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach
	<mike.leach@...aro.org>,
        James Clark <james.clark@...aro.org>, Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan
	<leo.yan@...ux.dev>,
        Clément Le Goffic
	<legoffic.clement@...il.com>,
        Linus Walleij <linusw@...nel.org>,
        "Maxime
 Coquelin" <mcoquelin.stm32@...il.com>,
        Alexandre Torgue
	<alexandre.torgue@...s.st.com>
CC: <coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-gpio@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        Gatien Chevallier <gatien.chevallier@...s.st.com>
Subject: [PATCH 01/11] dt-bindings: document access-controllers property
 for coresight peripherals

Document the access-controllers for coresight peripherals in case some
access checks need to be performed to use them.

Signed-off-by: Gatien Chevallier <gatien.chevallier@...s.st.com>
---
 Documentation/devicetree/bindings/arm/arm,coresight-cti.yaml  | 3 +++
 Documentation/devicetree/bindings/arm/arm,coresight-etm.yaml  | 3 +++
 Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml  | 3 +++
 Documentation/devicetree/bindings/arm/arm,coresight-tpiu.yaml | 3 +++
 4 files changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-cti.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-cti.yaml
index 2a91670ccb8c..949444aba1f8 100644
--- a/Documentation/devicetree/bindings/arm/arm,coresight-cti.yaml
+++ b/Documentation/devicetree/bindings/arm/arm,coresight-cti.yaml
@@ -128,6 +128,9 @@ properties:
   "#address-cells":
     const: 1
 
+  access-controllers:
+    maxItems: 1
+
 patternProperties:
   '^trig-conns@([0-9]+)$':
     type: object
diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-etm.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-etm.yaml
index 71f2e1ed27e5..10ebbbeadf93 100644
--- a/Documentation/devicetree/bindings/arm/arm,coresight-etm.yaml
+++ b/Documentation/devicetree/bindings/arm/arm,coresight-etm.yaml
@@ -118,6 +118,9 @@ properties:
         description: Output connection from the ETM to CoreSight Trace bus.
         $ref: /schemas/graph.yaml#/properties/port
 
+  access-controllers:
+    maxItems: 1
+
 required:
   - compatible
   - clocks
diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
index 96dd5b5f771a..9dc096698c65 100644
--- a/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
+++ b/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
@@ -128,6 +128,9 @@ properties:
       - const: tracedata
       - const: metadata
 
+  access-controllers:
+    maxItems: 1
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-tpiu.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-tpiu.yaml
index a207f6899e67..29bbc3961fdf 100644
--- a/Documentation/devicetree/bindings/arm/arm,coresight-tpiu.yaml
+++ b/Documentation/devicetree/bindings/arm/arm,coresight-tpiu.yaml
@@ -70,6 +70,9 @@ properties:
         description: Input connection from the CoreSight Trace bus.
         $ref: /schemas/graph.yaml#/properties/port
 
+  access-controllers:
+    maxItems: 1
+
 required:
   - compatible
   - reg

-- 
2.43.0