Documentation/devicetree/bindings/arm/arm,coresight-dynamic-replicator.yaml

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/arm/arm,coresight-dynamic-replicator.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Arm Coresight Programmable Trace Bus Replicator

maintainers:
  - Mathieu Poirier <mathieu.poirier@linaro.org>
  - Mike Leach <mike.leach@linaro.org>
  - Leo Yan <leo.yan@linaro.org>
  - Suzuki K Poulose <suzuki.poulose@arm.com>

description: |
  CoreSight components are compliant with the ARM CoreSight architecture
  specification and can be connected in various topologies to suit a particular
  SoCs tracing needs. These trace components can generally be classified as
  sinks, links and sources. Trace data produced by one or more sources flows
  through the intermediate links connecting the source to the currently selected
  sink.

  The Coresight replicator splits a single trace stream into two trace streams
  for systems that have more than one trace sink component.

# Need a custom select here or 'arm,primecell' will match on lots of nodes
select:
  properties:
    compatible:
      contains:
        const: arm,coresight-dynamic-replicator
  required:
    - compatible

allOf:
  - $ref: /schemas/arm/primecell.yaml#

properties:
  compatible:
    items:
      - const: arm,coresight-dynamic-replicator
      - const: arm,primecell

  reg:
    maxItems: 1

  clocks:
    minItems: 1
    maxItems: 2

  clock-names:
    minItems: 1
    items:
      - const: apb_pclk
      - const: atclk

  power-domains:
    maxItems: 1

  qcom,replicator-loses-context:
    type: boolean
    description:
      Indicates that the replicator will lose register context when AMBA clock
      is removed which is observed in some replicator designs.

  in-ports:
    $ref: /schemas/graph.yaml#/properties/ports
    additionalProperties: false

    properties:
      port:
        description: Input connection from CoreSight Trace bus
        $ref: /schemas/graph.yaml#/properties/port

  out-ports:
    $ref: /schemas/graph.yaml#/properties/ports

    patternProperties:
      '^port(@[01])?$':
        description: Output connections to CoreSight Trace bus
        $ref: /schemas/graph.yaml#/properties/port

required:
  - compatible
  - reg
  - clocks
  - clock-names
  - in-ports
  - out-ports

unevaluatedProperties: false

examples:
  - |
    replicator@20120000 {
        compatible = "arm,coresight-dynamic-replicator", "arm,primecell";
        reg = <0x20120000 0x1000>;

        clocks = <&soc_smc50mhz>;
        clock-names = "apb_pclk";

        out-ports {
            #address-cells = <1>;
            #size-cells = <0>;

            /* replicator output ports */
            port@0 {
                reg = <0>;
                replicator_out_port0: endpoint {
                    remote-endpoint = <&tpiu_in_port>;
                };
            };

            port@1 {
                reg = <1>;
                replicator_out_port1: endpoint {
                    remote-endpoint = <&etr_in_port>;
                };
            };
        };
        in-ports {
            port {
                replicator_in_port0: endpoint {
                    remote-endpoint = <&csys2_funnel_out_port>;
                };
            };
        };
    };
...