xref: /freebsd/sys/contrib/device-tree/Bindings/timer/andestech,plmt0.yaml (revision 833e5d42ab135b0238e61c5b3c19b8619677cbfa)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/timer/andestech,plmt0.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Andes machine-level timer

description:
  The Andes machine-level timer device (PLMT0) provides machine-level timer
  functionality for a set of HARTs on a RISC-V platform. It has a single
  fixed-frequency monotonic time counter (MTIME) register and a time compare
  register (MTIMECMP) for each HART connected to the PLMT0. A timer interrupt is
  generated if MTIME >= MTIMECMP.

maintainers:
  - Ben Zong-You Xie <ben717@andestech.com>

properties:
  compatible:
    items:
      - enum:
          - andestech,qilai-plmt
      - const: andestech,plmt0

  reg:
    maxItems: 1

  interrupts-extended:
    minItems: 1
    maxItems: 32
    description:
      Specifies which harts are connected to the PLMT0. Each item must points
      to a riscv,cpu-intc node, which has a riscv cpu node as parent. The
      PLMT0 supports 1 hart up to 32 harts.

additionalProperties: false

required:
  - compatible
  - reg
  - interrupts-extended

examples:
  - |
    interrupt-controller@100000 {
      compatible = "andestech,qilai-plmt", "andestech,plmt0";
      reg = <0x100000 0x100000>;
      interrupts-extended = <&cpu0intc 7>,
                            <&cpu1intc 7>,
                            <&cpu2intc 7>,
                            <&cpu3intc 7>;
    };