dt-bindings: arm: Add remote etm dt-binding

# 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

  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>;

                };

            };

        };

    };

...