dt-bindings: interrupt-controller: Add Loongson-3 HTPIC

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: "http://devicetree.org/schemas/interrupt-controller/loongson,htpic.yaml#"

$schema: "http://devicetree.org/meta-schemas/core.yaml#"

title: Loongson-3 HyperTransport Interrupt Controller

maintainers:

  - Jiaxun Yang <jiaxun.yang@flygoat.com>

allOf:

  - $ref: /schemas/interrupt-controller.yaml#

description: |

  This interrupt controller is found in the Loongson-3 family of chips to transmit

  interrupts from PCH PIC connected on HyperTransport bus.

properties:

  compatible:

    const: loongson,htpic-1.0

  reg:

    maxItems: 1

  interrupts:

    minItems: 1

    maxItems: 4

    description: |

      Four parent interrupts that receive chained interrupts.

  interrupt-controller: true

  '#interrupt-cells':

    const: 1

required:

  - compatible

  - reg

  - interrupts

  - interrupt-controller

  - '#interrupt-cells'

examples:

  - |

    #include <dt-bindings/interrupt-controller/irq.h>

    htintc: interrupt-controller@1fb000080 {

      compatible = "loongson,htintc-1.0";

      reg = <0xfb000080 0x40>;

      interrupt-controller;

      #interrupt-cells = <1>;

      interrupt-parent = <&liointc>;

      interrupts = <24 IRQ_TYPE_LEVEL_HIGH>,

                    <25 IRQ_TYPE_LEVEL_HIGH>,

                    <26 IRQ_TYPE_LEVEL_HIGH>,

                    <27 IRQ_TYPE_LEVEL_HIGH>;

    };

...