dt-bindings: mmc: Add bindings for LiteSDCard

# SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause

%YAML 1.2

---

$id: http://devicetree.org/schemas/mmc/litex,mmc.yaml#

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

title: LiteX LiteSDCard device

maintainers:

  - Gabriel Somlo <gsomlo@gmail.com>

description: |

  LiteSDCard is a small footprint, configurable SDCard core for FPGA based

  system on chips.

  The hardware source is Open Source and can be found on at

  https://github.com/enjoy-digital/litesdcard/.

allOf:

  - $ref: mmc-controller.yaml#

properties:

  compatible:

    const: litex,mmc

  reg:

    items:

      - description: PHY registers

      - description: CORE registers

      - description: DMA Reader buffer

      - description: DMA Writer buffer

      - description: IRQ registers

    minItems: 4

  reg-names:

    items:

      - const: phy

      - const: core

      - const: reader

      - const: writer

      - const: irq

    minItems: 4

  clocks:

    maxItems: 1

    description:

      Handle to reference clock.

  vmmc-supply:

    description:

      Handle to fixed-voltage supply for the card power.

  interrupts:

    maxItems: 1

required:

  - compatible

  - reg

  - reg-names

  - clocks

  - vmmc-supply

additionalProperties: false

examples:

  - |

    mmc: mmc@12005000 {

        compatible = "litex,mmc";

        reg = <0x12005000 0x100>,

              <0x12003800 0x100>,

              <0x12003000 0x100>,

              <0x12004800 0x100>,

              <0x12004000 0x100>;

        reg-names = "phy", "core", "reader", "writer", "irq";

        clocks = <&reference_clk>;

        vmmc-supply = <&vreg_mmc>;

        interrupts = <4>;

    };