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. Signed-off-by: Mao Jinlong <quic_jinlmao@xxxxxxxxxxx> --- .../arm/qcom,coresight-remote-etm.yaml | 60 +++++++++++++++++++ 1 file changed, 60 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..bc76cda33620 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/qcom,coresight-remote-etm.yaml @@ -0,0 +1,60 @@ +# 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@xxxxxxxxxxx> + - Tao Zhang <quic_taozha@xxxxxxxxxxx> + +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 + + qcom,inst-id: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Each kind of remote ETM has its unique instance id. The remote etm will + be enabled/disabled on remote processor based on the id send from + ap processor. + + 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 + - qcom,inst-id + - out-ports + +additionalProperties: false + +examples: + - | + modem-etm0 { + compatible = "qcom,coresight-remote-etm"; + qcom,inst-id = <2>; + + out-ports { + port { + modem_etm0_out_funnel_modem: endpoint { + remote-endpoint = <&funnel_modem_in_modem_etm0>; + }; + }; + }; + }; +... -- 2.41.0
