Documentation/devicetree/bindings/perf/arm,cmn.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright 2020 Arm Ltd.
%YAML 1.2
---
$id: http://devicetree.org/schemas/perf/arm,cmn.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Arm CMN (Coherent Mesh Network) Performance Monitors

maintainers:
  - Robin Murphy <robin.murphy@arm.com>

properties:
  compatible:
    enum:
      - arm,cmn-600
      - arm,ci-700

  reg:
    items:
      - description: Physical address of the base (PERIPHBASE) and
          size of the configuration address space.

  interrupts:
    minItems: 1
    items:
      - description: Overflow interrupt for DTC0
      - description: Overflow interrupt for DTC1
      - description: Overflow interrupt for DTC2
      - description: Overflow interrupt for DTC3
    description: One interrupt for each DTC domain implemented must
      be specified, in order. DTC0 is always present.

  arm,root-node:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: Offset from PERIPHBASE of CMN-600's configuration
      discovery node (see TRM definition of ROOTNODEBASE). Not
      relevant for newer CMN/CI products.

required:
  - compatible
  - reg
  - interrupts

if:
  properties:
    compatible:
      contains:
        const: arm,cmn-600
then:
  required:
    - arm,root-node

additionalProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/interrupt-controller/irq.h>
    pmu@50000000 {
        compatible = "arm,cmn-600";
        reg = <0x50000000 0x4000000>;
        /* 4x2 mesh with one DTC, and CFG node at 0,1,1,0 */
        interrupts = <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>;
        arm,root-node = <0x104000>;
    };
...