dt-bindings: phy: intel-emmc-phy: Add YAML schema for LGM eMMC PHY

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/phy/intel,lgm-emmc-phy.yaml#

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

title: Intel Lightning Mountain(LGM) eMMC PHY Device Tree Bindings

maintainers:

  - Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>

description: |+

  Bindings for eMMC PHY on Intel's Lightning Mountain SoC, syscon

  node is used to reference the base address of eMMC phy registers.

  The eMMC PHY node should be the child of a syscon node with the

  required property:

  - compatible:         Should be one of the following:

                        "intel,lgm-syscon", "syscon"

  - reg:

      maxItems: 1

properties:

  compatible:

      const: intel,lgm-emmc-phy

  "#phy-cells":

    const: 0

  reg:

    maxItems: 1

  clocks:

    maxItems: 1

required:

  - "#phy-cells"

  - compatible

  - reg

  - clocks

examples:

  - |

    sysconf: chiptop@e0200000 {

      compatible = "intel,lgm-syscon", "syscon";

      reg = <0xe0200000 0x100>;

      emmc-phy: emmc-phy@a8 {

        compatible = "intel,lgm-emmc-phy";

        reg = <0x00a8 0x10>;

        clocks = <&emmc>;

        #phy-cells = <0>;

      };

    };

...