| # SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause |
| # Copyright 2021, Arm Ltd |
| %YAML 1.2 |
| --- |
| $id: "http://devicetree.org/schemas/arm/trbe.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>; |
| }; |
| ... |
