dt-bindings: interrupt-controller: Convert stm32-exti to json-schema

STM32 External Interrupt Controller

Required properties:

- compatible: Should be:

    "st,stm32-exti"

    "st,stm32h7-exti"

    "st,stm32mp1-exti"

- reg: Specifies base physical address and size of the registers

- interrupt-controller: Indentifies the node as an interrupt controller

- #interrupt-cells: Specifies the number of cells to encode an interrupt

  specifier, shall be 2

- interrupts: interrupts references to primary interrupt controller

  (only needed for exti controller with multiple exti under

  same parent interrupt: st,stm32-exti and st,stm32h7-exti)

Optional properties:

- hwlocks: reference to a phandle of a hardware spinlock provider node.

Example:

exti: interrupt-controller@40013c00 {

	compatible = "st,stm32-exti";

	interrupt-controller;

	#interrupt-cells = <2>;

	reg = <0x40013C00 0x400>;

	interrupts = <1>, <2>, <3>, <6>, <7>, <8>, <9>, <10>, <23>, <40>, <41>, <42>, <62>, <76>;

};

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/interrupt-controller/st,stm32-exti.yaml#

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

title: STM32 External Interrupt Controller Device Tree Bindings

maintainers:

  - Alexandre Torgue <alexandre.torgue@st.com>

  - Ludovic Barre <ludovic.barre@st.com>

properties:

  compatible:

    oneOf:

      - items:

        - enum:

          - st,stm32-exti

          - st,stm32h7-exti

      - items:

        - enum:

          - st,stm32mp1-exti

        - const: syscon

  "#interrupt-cells":

    const: 2

  reg:

    maxItems: 1

  interrupt-controller: true

  hwlocks:

    maxItems: 1

    description:

      Reference to a phandle of a hardware spinlock provider node.

  interrupts:

    description:

      Interrupts references to primary interrupt controller

required:

  - "#interrupt-cells"

  - compatible

  - reg

  - interrupt-controller

allOf:

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

  - if:

      properties:

        compatible:

          contains:

            enum:

              - st,stm32-exti

    then:

      properties:

        interrupts:

          minItems: 1

          maxItems: 32

      required:

        - interrupts

  - if:

      properties:

        compatible:

          contains:

            enum:

              - st,stm32h7-exti

    then:

      properties:

        interrupts:

          minItems: 1

          maxItems: 96

      required:

        - interrupts

additionalProperties: false

examples:

  - |

    //Example 1

    exti1: interrupt-controller@5000d000 {

        compatible = "st,stm32mp1-exti", "syscon";

        interrupt-controller;

        #interrupt-cells = <2>;

        reg = <0x5000d000 0x400>;

    };

    //Example 2

    exti2: interrupt-controller@40013c00 {

        compatible = "st,stm32-exti";

        interrupt-controller;

        #interrupt-cells = <2>;

        reg = <0x40013C00 0x400>;

        interrupts = <1>, <2>, <3>, <6>, <7>, <8>, <9>, <10>, <23>, <40>, <41>, <42>, <62>, <76>;

    };

...