linux-kernel - [PATCH v2 01/12] dt-bindings: arm: coresight: Add 'qcom,cpu-bound-components' property

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Message-Id: <20251218-cpu_cluster_component_pm-v2-1-2335a6ae62a0@oss.qualcomm.com>
Date: Thu, 18 Dec 2025 00:09:41 -0800
From: Yuanfang Zhang <yuanfang.zhang@....qualcomm.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>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: kernel@....qualcomm.com, coresight@...ts.linaro.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Yuanfang Zhang <yuanfang.zhang@....qualcomm.com>,
        maulik.shah@....qualcomm.com
Subject: [PATCH v2 01/12] dt-bindings: arm: coresight: Add
 'qcom,cpu-bound-components' property

Introduce the `qcom,cpu-bound-components` boolean property for CoreSight
components (TMC, Funnel, and Replicator).

This property indicates that the component is physically located within a
CPU cluster power domain. Such components share the power state of the
cluster and may require special handling (e.g., cross-CPU register
access) compared to system-wide components.

Signed-off-by: Yuanfang Zhang <yuanfang.zhang@....qualcomm.com>
---
 .../devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml        | 5 +++++
 .../devicetree/bindings/arm/arm,coresight-dynamic-replicator.yaml    | 5 +++++
 Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml         | 5 +++++
 3 files changed, 15 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml
index b74db15e5f8af2226b817f6af5f533b1bfc74736..a4c7333e8359da9035a9fed999ec99159e00a1d9 100644
--- a/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml
+++ b/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml
@@ -57,6 +57,11 @@ properties:
   power-domains:
     maxItems: 1
 
+  qcom,cpu-bound-components:
+    type: boolean
+    description:
+      Indicates whether the funnel is located physically within cpu cluster.
+
   label:
     description:
       Description of a coresight device.
diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-replicator.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-replicator.yaml
index 17ea936b796fd42bb885e539201276a11e91028c..2c6e78f02ed84d95bb4366e4c4bbd1b3953efa32 100644
--- a/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-replicator.yaml
+++ b/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-replicator.yaml
@@ -67,6 +67,11 @@ properties:
       Indicates that the replicator will lose register context when AMBA clock
       is removed which is observed in some replicator designs.
 
+  qcom,cpu-bound-components:
+    type: boolean
+    description:
+      Indicates whether the replicator is located physically within cpu cluster.
+
   in-ports:
     $ref: /schemas/graph.yaml#/properties/ports
     additionalProperties: false
diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
index 96dd5b5f771a39138df9adde0c9c9a6f5583d9da..8c4f2244a5c74dc8654892305025a4e6bccbce07 100644
--- a/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
+++ b/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
@@ -86,6 +86,11 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint32
     maximum: 15
 
+  qcom,cpu-bound-components:
+    type: boolean
+    description:
+      indicates whether the TMC-ETF is located physically within cpu cluster.
+
   in-ports:
     $ref: /schemas/graph.yaml#/properties/ports
     additionalProperties: false

-- 
2.34.1