1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2 # Copyright 2021, Arm Ltd
3 %YAML 1.2
4 ---
5 $id: http://devicetree.org/schemas/arm/arm,trace-buffer-extension.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
7
8 title: ARM Trace Buffer Extensions
9
10 maintainers:
11 - Anshuman Khandual <anshuman.khandual@arm.com>
12
13 description: |
14 Arm Trace Buffer Extension (TRBE) is a per CPU component
15 for storing trace generated on the CPU to memory. It is
16 accessed via CPU system registers. The software can verify
17 if it is permitted to use the component by checking the
18 TRBIDR register.
19
20 properties:
21 $nodename:
22 const: trbe
23
24 compatible:
25 items:
26 - const: arm,trace-buffer-extension
27
28 interrupts:
29 description: |
30 Exactly 1 PPI must be listed. For heterogeneous systems where
31 TRBE is only supported on a subset of the CPUs, please consult
32 the arm,gic-v3 binding for details on describing a PPI partition.
33 maxItems: 1
34
35 required:
36 - compatible
37 - interrupts
38
39 additionalProperties: false
40
41 examples:
42
43 - |
44 #include <dt-bindings/interrupt-controller/arm-gic.h>
45
46 trbe {
47 compatible = "arm,trace-buffer-extension";
48 interrupts = <GIC_PPI 15 IRQ_TYPE_LEVEL_HIGH>;
49 };
50 ...
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