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 8title: ARM Trace Buffer Extensions 9 10maintainers: 11 - Anshuman Khandual <anshuman.khandual@arm.com> 12 13description: | 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 20properties: 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 35required: 36 - compatible 37 - interrupts 38 39additionalProperties: false 40 41examples: 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... 51