xref: /linux/Documentation/devicetree/bindings/arm/arm,coresight-etb10.yaml (revision db4a3f0fbedb0398f77b9047e8b8bb2b49f355bb) 
1# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/arm/arm,coresight-etb10.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Arm CoreSight Embedded Trace Buffer
8
9maintainers:
10  - Mathieu Poirier <mathieu.poirier@linaro.org>
11  - Mike Leach <mike.leach@linaro.org>
12  - Leo Yan <leo.yan@linaro.org>
13  - Suzuki K Poulose <suzuki.poulose@arm.com>
14
15description: |
16  CoreSight components are compliant with the ARM CoreSight architecture
17  specification and can be connected in various topologies to suit a particular
18  SoCs tracing needs. These trace components can generally be classified as
19  sinks, links and sources. Trace data produced by one or more sources flows
20  through the intermediate links connecting the source to the currently selected
21  sink.
22
23  The CoreSight Embedded Trace Buffer stores traces in a dedicated SRAM that is
24  used as a circular buffer.
25
26# Need a custom select here or 'arm,primecell' will match on lots of nodes
27select:
28  properties:
29    compatible:
30      contains:
31        const: arm,coresight-etb10
32  required:
33    - compatible
34
35allOf:
36  - $ref: /schemas/arm/primecell.yaml#
37
38properties:
39  compatible:
40    items:
41      - const: arm,coresight-etb10
42      - const: arm,primecell
43
44  reg:
45    maxItems: 1
46
47  clocks:
48    minItems: 1
49    maxItems: 2
50
51  clock-names:
52    minItems: 1
53    items:
54      - const: apb_pclk
55      - const: atclk
56
57  label:
58    description:
59      Description of a coresight device.
60
61  power-domains:
62    maxItems: 1
63
64  in-ports:
65    $ref: /schemas/graph.yaml#/properties/ports
66    additionalProperties: false
67
68    properties:
69      port:
70        description: Input connection from CoreSight Trace bus.
71        $ref: /schemas/graph.yaml#/properties/port
72
73required:
74  - compatible
75  - reg
76  - clocks
77  - clock-names
78  - in-ports
79
80unevaluatedProperties: false
81
82examples:
83  - |
84    etb@20010000 {
85        compatible = "arm,coresight-etb10", "arm,primecell";
86        reg = <0x20010000 0x1000>;
87
88        clocks = <&oscclk6a>;
89        clock-names = "apb_pclk";
90        in-ports {
91            port {
92                etb_in_port: endpoint {
93                    remote-endpoint = <&replicator_out_port0>;
94                };
95            };
96        };
97    };
98
99...
100