Documentation/devicetree/bindings/gpio/altr-pio-1.0.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/gpio/altr-pio-1.0.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Altera GPIO controller

maintainers:
  - Dinh Nguyen <dinguyen@kernel.org>
  - Marek Vasut <marex@denx.de>
  - Mathieu Malaterre <malat@debian.org>
  - Tien Hock Loh <thloh@altera.com>

properties:
  compatible:
    const: altr,pio-1.0

  reg:
    maxItems: 1

  gpio-controller: true

  "#gpio-cells":
    const: 2
    description:
      First cell is the GPIO offset number. Second cell is reserved and
      currently unused.

  interrupts:
    maxItems: 1

  interrupt-controller: true

  "#interrupt-cells":
    const: 2

  altr,ngpio:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: Width of the GPIO bank.
    default: 32

  altr,interrupt-type:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: >
      Specifies the interrupt trigger type synthesized by hardware.
      Values defined in <dt-bindings/interrupt-controller/irq.h>.
    enum: [1, 2, 3, 4]

required:
  - compatible
  - reg
  - gpio-controller
  - "#gpio-cells"
  - interrupts
  - interrupt-controller
  - "#interrupt-cells"

additionalProperties: false

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

    gpio@ff200000 {
        compatible = "altr,pio-1.0";
        reg = <0xff200000 0x10>;
        interrupts = <45 4>;
        interrupt-controller;
        #interrupt-cells = <2>;
        gpio-controller;
        #gpio-cells = <2>;
        altr,ngpio = <32>;
        altr,interrupt-type = <IRQ_TYPE_EDGE_RISING>;
    };