0001 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/arm/arm,coresight-etb10.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Arm CoreSight Embedded Trace Buffer
0008
0009 maintainers:
0010 - Mathieu Poirier <mathieu.poirier@linaro.org>
0011 - Mike Leach <mike.leach@linaro.org>
0012 - Leo Yan <leo.yan@linaro.org>
0013 - Suzuki K Poulose <suzuki.poulose@arm.com>
0014
0015 description: |
0016 CoreSight components are compliant with the ARM CoreSight architecture
0017 specification and can be connected in various topologies to suit a particular
0018 SoCs tracing needs. These trace components can generally be classified as
0019 sinks, links and sources. Trace data produced by one or more sources flows
0020 through the intermediate links connecting the source to the currently selected
0021 sink.
0022
0023 The CoreSight Embedded Trace Buffer stores traces in a dedicated SRAM that is
0024 used as a circular buffer.
0025
0026 # Need a custom select here or 'arm,primecell' will match on lots of nodes
0027 select:
0028 properties:
0029 compatible:
0030 contains:
0031 const: arm,coresight-etb10
0032 required:
0033 - compatible
0034
0035 allOf:
0036 - $ref: /schemas/arm/primecell.yaml#
0037
0038 properties:
0039 compatible:
0040 items:
0041 - const: arm,coresight-etb10
0042 - const: arm,primecell
0043
0044 reg:
0045 maxItems: 1
0046
0047 clocks:
0048 minItems: 1
0049 maxItems: 2
0050
0051 clock-names:
0052 minItems: 1
0053 items:
0054 - const: apb_pclk
0055 - const: atclk
0056
0057 in-ports:
0058 $ref: /schemas/graph.yaml#/properties/ports
0059 additionalProperties: false
0060
0061 properties:
0062 port:
0063 description: Input connection from CoreSight Trace bus.
0064 $ref: /schemas/graph.yaml#/properties/port
0065
0066 required:
0067 - compatible
0068 - reg
0069 - clocks
0070 - clock-names
0071 - in-ports
0072
0073 unevaluatedProperties: false
0074
0075 examples:
0076 - |
0077 etb@20010000 {
0078 compatible = "arm,coresight-etb10", "arm,primecell";
0079 reg = <0x20010000 0x1000>;
0080
0081 clocks = <&oscclk6a>;
0082 clock-names = "apb_pclk";
0083 in-ports {
0084 port {
0085 etb_in_port: endpoint {
0086 remote-endpoint = <&replicator_out_port0>;
0087 };
0088 };
0089 };
0090 };
0091
0092 ...
