spi: dt-bindings: axiado,ax3000-spi: Add binding for Axiado SPI DB controller

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/spi/axiado,ax3000-spi.yaml#

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

title: Axiado AX3000 SoC SPI controller

maintainers:

  - Vladimir Moravcevic <vmoravcevic@axiado.com>

  - Tzu-Hao Wei <twei@axiado.com>

  - Swark Yang <syang@axiado.com>

  - Prasad Bolisetty <pbolisetty@axiado.com>

allOf:

  - $ref: spi-controller.yaml#

properties:

  compatible:

    enum:

      - axiado,ax3000-spi

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clock-names:

    items:

      - const: ref

      - const: pclk

  clocks:

    maxItems: 2

  num-cs:

    description: |

      Number of chip selects used.

    $ref: /schemas/types.yaml#/definitions/uint32

    minimum: 1

    maximum: 4

    default: 4

required:

  - compatible

  - reg

  - interrupts

  - clock-names

  - clocks

unevaluatedProperties: false

examples:

  - |

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

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

   soc {

      #address-cells = <2>;

      #size-cells = <2>;

      spi@80510000 {

         compatible = "axiado,ax3000-spi";

         reg = <0x00 0x80510000 0x00 0x1000>;

         clock-names = "ref", "pclk";

         clocks = <&spi_clk>, <&apb_pclk>;

         interrupt-parent = <&gic500>;

         interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;

         num-cs = <4>;

      };

   };

...