xref: /linux/Documentation/devicetree/bindings/arm/arm,coresight-etb10.yaml (revision 9f2c9170934eace462499ba0bfe042cc72900173) 
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  power-domains:
58    maxItems: 1
59
60  in-ports:
61    $ref: /schemas/graph.yaml#/properties/ports
62    additionalProperties: false
63
64    properties:
65      port:
66        description: Input connection from CoreSight Trace bus.
67        $ref: /schemas/graph.yaml#/properties/port
68
69required:
70  - compatible
71  - reg
72  - clocks
73  - clock-names
74  - in-ports
75
76unevaluatedProperties: false
77
78examples:
79  - |
80    etb@20010000 {
81        compatible = "arm,coresight-etb10", "arm,primecell";
82        reg = <0x20010000 0x1000>;
83
84        clocks = <&oscclk6a>;
85        clock-names = "apb_pclk";
86        in-ports {
87            port {
88                etb_in_port: endpoint {
89                    remote-endpoint = <&replicator_out_port0>;
90                };
91            };
92        };
93    };
94
95...
96