# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright 2021 Arm Ltd.
%YAML 1.2
---
$id: http://devicetree.org/schemas/perf/arm,dsu-pmu.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: ARM DynamIQ Shared Unit (DSU) Performance Monitor Unit (PMU)

maintainers:
  - Suzuki K Poulose <suzuki.poulose@arm.com>
  - Robin Murphy <robin.murphy@arm.com>

description:
  ARM DynamIQ Shared Unit (DSU) integrates one or more CPU cores with a shared
  L3 memory system, control logic and external interfaces to form a multicore
  cluster. The PMU enables gathering various statistics on the operation of the
  DSU. The PMU provides independent 32-bit counters that can count any of the
  supported events, along with a 64-bit cycle counter. The PMU is accessed via
  CPU system registers and has no MMIO component.

properties:
  compatible:
    oneOf:
      - const: arm,dsu-pmu
      - items:
          - const: arm,dsu-110-pmu
          - const: arm,dsu-pmu

  interrupts:
    items:
      - description: nCLUSTERPMUIRQ interrupt

  cpus:
    $ref: /schemas/types.yaml#/definitions/phandle-array
    minItems: 1
    maxItems: 12
    items:
      maxItems: 1
    description: List of phandles for the CPUs connected to this DSU instance.

required:
  - compatible
  - interrupts
  - cpus

additionalProperties: false