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 compatible: 24 items: 25 - const: arm,trace-buffer-extension 26 27 interrupts: 28 description: | 29 Exactly 1 PPI must be listed. For heterogeneous systems where 30 TRBE is only supported on a subset of the CPUs, please consult 31 the arm,gic-v3 binding for details on describing a PPI partition. 32 maxItems: 1 33 34required: 35 - compatible 36 - interrupts 37 38additionalProperties: false 39 40examples: 41 42 - | 43 #include <dt-bindings/interrupt-controller/arm-gic.h> 44 45 trbe { 46 compatible = "arm,trace-buffer-extension"; 47 interrupts = <GIC_PPI 15 IRQ_TYPE_LEVEL_HIGH>; 48 }; 49... 50