| # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause | |
| # Copyright 2021, Arm Ltd | |
| %YAML 1.2 | |
| --- | |
| $id: http://devicetree.org/schemas/arm/arm,trace-buffer-extension.yaml# | |
| $schema: http://devicetree.org/meta-schemas/core.yaml# | |
| title: ARM Trace Buffer Extensions | |
| maintainers: | |
| - Anshuman Khandual <anshuman.khandual@arm.com> | |
| description: | | |
| Arm Trace Buffer Extension (TRBE) is a per CPU component | |
| for storing trace generated on the CPU to memory. It is | |
| accessed via CPU system registers. The software can verify | |
| if it is permitted to use the component by checking the | |
| TRBIDR register. | |
| properties: | |
| $nodename: | |
| const: trbe | |
| compatible: | |
| items: | |
| - const: arm,trace-buffer-extension | |
| interrupts: | |
| description: | | |
| Exactly 1 PPI must be listed. For heterogeneous systems where | |
| TRBE is only supported on a subset of the CPUs, please consult | |
| the arm,gic-v3 binding for details on describing a PPI partition. | |
| maxItems: 1 | |
| required: | |
| - compatible | |
| - interrupts | |
| additionalProperties: false | |
| examples: | |
| - | | |
| #include <dt-bindings/interrupt-controller/arm-gic.h> | |
| trbe { | |
| compatible = "arm,trace-buffer-extension"; | |
| interrupts = <GIC_PPI 15 IRQ_TYPE_LEVEL_HIGH>; | |
| }; | |
| ... |