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-tpiu.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Arm CoreSight Trace Port Interface Unit
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 Trace Port Interface Unit captures trace data from the trace bus
24 and outputs it to an external trace port.
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-tpiu
32 required:
33 - compatible
34
35 allOf:
36 - $ref: /schemas/arm/primecell.yaml#
37
38 properties:
39 compatible:
40 items:
41 - const: arm,coresight-tpiu
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 the 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 tpiu@e3c05000 {
81 compatible = "arm,coresight-tpiu", "arm,primecell";
82 reg = <0xe3c05000 0x1000>;
83
84 clocks = <&clk_375m>;
85 clock-names = "apb_pclk";
86 in-ports {
87 port {
88 tpiu_in_port: endpoint {
89 remote-endpoint = <&funnel4_out_port0>;
90 };
91 };
92 };
93 };
94 ...
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