[PATCH v6 1/5] dt-bindings: arm: coresight-tnoc: Bind on platform bus instead of AMBA
From: Jie Gan <hidden>
Date: 2026-07-10 02:40:12
Also in:
linux-arm-msm, linux-devicetree, lkml
Subsystem:
arm/coresight framework and drivers, arm/qualcomm mailing list, open firmware and flattened device tree bindings, the rest · Maintainers:
Suzuki K Poulose, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
The Aggregator TraceNoC hardware exposes CID registers, but the Component ID value returned by the hardware is 0x00000000 instead of a valid AMBA Component ID. As a result, the device cannot be identified on the AMBA bus. Describe the Aggregator TraceNoC with a dedicated single "qcom,coresight-tnoc" compatible instead of the two-string AMBA form "qcom,coresight-tnoc", "arm,primecell". This creates the device on the platform bus so it is bound by the platform driver through its compatible string rather than as an AMBA device. Signed-off-by: Jie Gan <redacted> --- .../devicetree/bindings/arm/qcom,coresight-tnoc.yaml | 16 ++-------------- 1 file changed, 2 insertions(+), 14 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-tnoc.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-tnoc.yaml
index ef648a15b806..72fb1210e22e 100644
--- a/Documentation/devicetree/bindings/arm/qcom,coresight-tnoc.yaml
+++ b/Documentation/devicetree/bindings/arm/qcom,coresight-tnoc.yaml@@ -22,24 +22,12 @@ description: > Note this binding is specifically intended for Aggregator TNOC instances. -# Need a custom select here or 'arm,primecell' will match on lots of nodes -select: - properties: - compatible: - contains: - enum: - - qcom,coresight-tnoc - required: - - compatible - properties: $nodename: pattern: "^tn(@[0-9a-f]+)$" compatible: - items: - - const: qcom,coresight-tnoc - - const: arm,primecell + const: qcom,coresight-tnoc reg: maxItems: 1
@@ -83,7 +71,7 @@ additionalProperties: false examples: - | tn@109ab000 { - compatible = "qcom,coresight-tnoc", "arm,primecell"; + compatible = "qcom,coresight-tnoc"; reg = <0x109ab000 0x4200>; clocks = <&aoss_qmp>;
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2.34.1