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
7 title: Arm CoreSight Embedded Trace Buffer
8
9 maintainers:
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
15 description: |
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
27 select:
28 properties:
29 compatible:
30 contains:
31 const: arm,coresight-etb10
32 required:
33 - compatible
34
35 allOf:
36 - $ref: /schemas/arm/primecell.yaml#
37
38 properties:
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
69 required:
70 - compatible
71 - reg
72 - clocks
73 - clock-names
74 - in-ports
75
76 unevaluatedProperties: false
77
78 examples:
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 ...
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.