dt-binding: spi: add bindings for spi-ar934x

# SPDX-License-Identifier: GPL-2.0

%YAML 1.2

---

$id: http://devicetree.org/schemas/spi/qca,ar934x-spi.yaml#

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

title: Qualcomm Atheros AR934x/QCA95xx SoC SPI controller

maintainers:

  - Chuanhong Guo <gch981213@gmail.com>

allOf:

  - $ref: spi-controller.yaml#

properties:

  compatible:

    const: qca,ar934x-spi

  reg:

    maxItems: 1

  clocks:

    maxItems: 1

required:

  - compatible

  - reg

  - clocks

  - '#address-cells'

  - '#size-cells'

examples:

  - |

    #include <dt-bindings/clock/ath79-clk.h>

    spi: spi@1f000000 {

        compatible = "qca,ar934x-spi";

        reg = <0x1f000000 0x1c>;

        clocks = <&pll ATH79_CLK_AHB>;

        #address-cells = <1>;

        #size-cells = <0>;

    };