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Message-ID: <20231210072633.4243-2-quic_jinlmao@quicinc.com> Date: Sat, 9 Dec 2023 23:26:28 -0800 From: Mao Jinlong <quic_jinlmao@...cinc.com> To: Andy Gross <agross@...nel.org>, Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org> CC: Mao Jinlong <quic_jinlmao@...cinc.com>, <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Tingwei Zhang <quic_tingweiz@...cinc.com>, Yuanfang Zhang <quic_yuanfang@...cinc.com>, "Tao Zhang" <quic_taozha@...cinc.com>, Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> Subject: [PATCH v4 1/4] dt-bindings: arm: Add remote etm dt-binding Remote ETM(Embedded Trace Macrocell) is to capture information of the executed processor instructions of remote processors like modem. Add new coresight-remote-etm.yaml file describing the bindings required to define coresight remote etm in the device trees. Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> Signed-off-by: Mao Jinlong <quic_jinlmao@...cinc.com> --- .../arm/qcom,coresight-remote-etm.yaml | 51 +++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/qcom,coresight-remote-etm.yaml diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-remote-etm.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-remote-etm.yaml new file mode 100644 index 000000000000..4fd5752978cd --- /dev/null +++ b/Documentation/devicetree/bindings/arm/qcom,coresight-remote-etm.yaml @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/arm/qcom,coresight-remote-etm.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm Coresight Remote ETM(Embedded Trace Macrocell) + +maintainers: + - Jinlong Mao <quic_jinlmao@...cinc.com> + - Tao Zhang <quic_taozha@...cinc.com> + +description: + Support for ETM trace collection on remote processor using coresight + framework. Enabling this will allow turning on ETM tracing on remote + processor like modem processor via sysfs and collecting the trace + via coresight TMC sinks. + +properties: + compatible: + const: qcom,coresight-remote-etm + + out-ports: + $ref: /schemas/graph.yaml#/properties/ports + additionalProperties: false + + properties: + port: + description: Output connection to the CoreSight Trace bus. + $ref: /schemas/graph.yaml#/properties/port + +required: + - compatible + - out-ports + +additionalProperties: false + +examples: + - | + etm { + compatible = "qcom,coresight-remote-etm"; + + out-ports { + port { + modem_etm0_out_funnel_modem: endpoint { + remote-endpoint = <&funnel_modem_in_modem_etm0>; + }; + }; + }; + }; +... -- 2.41.0
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