Documentation/devicetree/bindings/timer/sifive,clint.yaml

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

title: SiFive Core Local Interruptor

maintainers:
  - Palmer Dabbelt <palmer@dabbelt.com>
  - Anup Patel <anup.patel@wdc.com>

description:
  SiFive (and other RISC-V) SOCs include an implementation of the SiFive
  Core Local Interruptor (CLINT) for M-mode timer and M-mode inter-processor
  interrupts. It directly connects to the timer and inter-processor interrupt
  lines of various HARTs (or CPUs) so RISC-V per-HART (or per-CPU) local
  interrupt controller is the parent interrupt controller for CLINT device.
  The clock frequency of CLINT is specified via "timebase-frequency" DT
  property of "/cpus" DT node. The "timebase-frequency" DT property is
  described in Documentation/devicetree/bindings/riscv/cpus.yaml

properties:
  compatible:
    items:
      - const: sifive,fu540-c000-clint
      - const: sifive,clint0

    description:
      Should be "sifive,<chip>-clint" and "sifive,clint<version>".
      Supported compatible strings are -
      "sifive,fu540-c000-clint" for the SiFive CLINT v0 as integrated
      onto the SiFive FU540 chip, and "sifive,clint0" for the SiFive
      CLINT v0 IP block with no chip integration tweaks.
      Please refer to sifive-blocks-ip-versioning.txt for details

  reg:
    maxItems: 1

  interrupts-extended:
    minItems: 1

additionalProperties: false

required:
  - compatible
  - reg
  - interrupts-extended

examples:
  - |
    timer@2000000 {
      compatible = "sifive,fu540-c000-clint", "sifive,clint0";
      interrupts-extended = <&cpu1intc 3 &cpu1intc 7
                             &cpu2intc 3 &cpu2intc 7
                             &cpu3intc 3 &cpu3intc 7
                             &cpu4intc 3 &cpu4intc 7>;
       reg = <0x2000000 0x10000>;
    };
...