dt-bindings: fsi: Add FSI2SPI bindings

# SPDX-License-Identifier: (GPL-2.0-or-later)

%YAML 1.2

---

$id: http://devicetree.org/schemas/fsi/ibm,fsi2spi.yaml#

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

title: IBM FSI-attached SPI controllers

maintainers:

 - Eddie James <eajames@linux.ibm.com>

description: |

  This binding describes an FSI CFAM engine called the FSI2SPI. Therefore this

  node will always be a child of an FSI CFAM node; see fsi.txt for details on

  FSI slave and CFAM nodes. This FSI2SPI engine provides access to a number of

  SPI controllers.

properties:

  compatible:

    enum:

      - ibm,fsi2spi

  reg:

    items:

      - description: FSI slave address

required:

  - compatible

  - reg

examples:

  - |

    fsi2spi@1c00 {

        compatible = "ibm,fsi2spi";

        reg = <0x1c00 0x400>;

    };