kernel/Documentation/devicetree/bindings/arm/qcom,coresight-remote-etm.yaml at efb5c7e8988808cc89b53fc47d66cb27729d74bd · sgaud-quic/kernel · GitHub

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# 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@quicinc.com>
  - Tao Zhang <quic_taozha@quicinc.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

  qcom,qmi-id:
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      This id is used by qmi API to communicate with remote processor for
      enabling and disabling remote etm. Each processor has its unique instance
      id.

  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
  - qcom,qmi-id

additionalProperties: false

examples:
  - |
    etm {
        compatible = "qcom,coresight-remote-etm";

        qcom,qmi-id = <2>;

        out-ports {
            port {
                modem_etm0_out_funnel_modem: endpoint {
                    remote-endpoint = <&funnel_modem_in_modem_etm0>;
                };
            };
        };
    };
...