dt-bindings: fpga: add binding doc for microchip-spi fpga mgr

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/fpga/microchip,mpf-spi-fpga-mgr.yaml#

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

title: Microchip Polarfire FPGA manager.

maintainers:

  - Ivan Bornyakov <i.bornyakov@metrotek.ru>

description:

  Device Tree Bindings for Microchip Polarfire FPGA Manager using slave SPI to

  load the bitstream in .dat format.

properties:

  compatible:

    enum:

      - microchip,mpf-spi-fpga-mgr

  reg:

    description: SPI chip select

    maxItems: 1

  spi-max-frequency: true

required:

  - compatible

  - reg

additionalProperties: false

examples:

  - |

    spi {

            #address-cells = <1>;

            #size-cells = <0>;

            fpga_mgr@0 {

                    compatible = "microchip,mpf-spi-fpga-mgr";

                    spi-max-frequency = <20000000>;

                    reg = <0>;

            };

    };