dt-bindings: net: Convert Calxeda Ethernet binding to json-schema

* Calxeda Highbank 10Gb XGMAC Ethernet

Required properties:

- compatible : Should be "calxeda,hb-xgmac"

- reg : Address and length of the register set for the device

- interrupts : Should contain 3 xgmac interrupts. The 1st is main interrupt.

  The 2nd is pwr mgt interrupt. The 3rd is low power state interrupt.

Optional properties:

- dma-coherent      : Present if dma operations are coherent

Example:

ethernet@fff50000 {

        compatible = "calxeda,hb-xgmac";

        reg = <0xfff50000 0x1000>;

        interrupts = <0 77 4  0 78 4  0 79 4>;

};

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/net/calxeda-xgmac.yaml#

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

title: Calxeda Highbank 10Gb XGMAC Ethernet controller

description: |

  The Calxeda XGMAC Ethernet controllers are directly connected to the

  internal machine "network fabric", which is set up, initialised and

  managed by the firmware. So there are no PHY properties in this

  binding. Switches in the fabric take care of routing and mapping the

  traffic to external network ports.

maintainers:

  - Andre Przywara <andre.przywara@arm.com>

properties:

  compatible:

    const: calxeda,hb-xgmac

  reg:

    maxItems: 1

  interrupts:

    description: |

      Can point to at most 3 xgmac interrupts. The 1st one is the main

      interrupt, the 2nd one is used for power management. The optional

      3rd one is the low power state interrupt.

    minItems: 2

    maxItems: 3

  dma-coherent: true

required:

  - compatible

  - reg

  - interrupts

additionalProperties: false

examples:

  - |

    ethernet@fff50000 {

        compatible = "calxeda,hb-xgmac";

        reg = <0xfff50000 0x1000>;

        interrupts = <0 77 4>, <0 78 4>, <0 79 4>;

    };