0001 # SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
0002 # Copyright 2021, Arm Ltd
0003 %YAML 1.2
0004 ---
0005 $id: "http://devicetree.org/schemas/arm/arm,trace-buffer-extension.yaml#"
0006 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
0007
0008 title: ARM Trace Buffer Extensions
0009
0010 maintainers:
0011 - Anshuman Khandual <anshuman.khandual@arm.com>
0012
0013 description: |
0014 Arm Trace Buffer Extension (TRBE) is a per CPU component
0015 for storing trace generated on the CPU to memory. It is
0016 accessed via CPU system registers. The software can verify
0017 if it is permitted to use the component by checking the
0018 TRBIDR register.
0019
0020 properties:
0021 $nodename:
0022 const: "trbe"
0023 compatible:
0024 items:
0025 - const: arm,trace-buffer-extension
0026
0027 interrupts:
0028 description: |
0029 Exactly 1 PPI must be listed. For heterogeneous systems where
0030 TRBE is only supported on a subset of the CPUs, please consult
0031 the arm,gic-v3 binding for details on describing a PPI partition.
0032 maxItems: 1
0033
0034 required:
0035 - compatible
0036 - interrupts
0037
0038 additionalProperties: false
0039
0040 examples:
0041
0042 - |
0043 #include <dt-bindings/interrupt-controller/arm-gic.h>
0044
0045 trbe {
0046 compatible = "arm,trace-buffer-extension";
0047 interrupts = <GIC_PPI 15 IRQ_TYPE_LEVEL_HIGH>;
0048 };
0049 ...
