xref: /openbmc/linux/Documentation/devicetree/bindings/mmc/socionext,uniphier-sd.yaml (revision 388dcd95)

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/mmc/socionext,uniphier-sd.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: UniPhier SD/SDIO/eMMC controller

maintainers:
  - Masahiro Yamada <yamada.masahiro@socionext.com>

properties:
  compatible:
    description: version 2.91, 3.1, 3.1.1, respectively
    enum:
      - socionext,uniphier-sd-v2.91
      - socionext,uniphier-sd-v3.1
      - socionext,uniphier-sd-v3.1.1

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    maxItems: 1

  dmas:
    maxItems: 1

  dma-names:
    const: rx-tx

  reset-names:
    description: |
      There are three reset signals at maximum
        host:   mandatory for all variants
        bridge: exist only for version 2.91
        hw:     optional. exist if eMMC hw reset line is available
    oneOf:
      - const: host
      - items:
          - const: host
          - const: bridge
      - items:
          - const: host
          - const: hw
      - items:
          - const: host
          - const: bridge
          - const: hw

  resets:
    minItems: 1
    maxItems: 3

  socionext,syscon-uhs-mode:
    $ref: /schemas/types.yaml#/definitions/phandle-array
    items:
      - items:
          - description: phandle to syscon that configures UHS mode
          - description: ID of SD instance
    description:
      A phandle to syscon with one argument that configures UHS mode.
      The argument is the ID of SD instance.

allOf:
  - $ref: mmc-controller.yaml

  - if:
      properties:
        compatible:
          contains:
            const: socionext,uniphier-sd-v2.91
    then:
      properties:
        reset-names:
          contains:
            const: bridge
    else:
      properties:
        reset-names:
          not:
            contains:
              const: bridge

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - reset-names
  - resets

unevaluatedProperties: false

examples:
  - |
    sd: mmc@5a400000 {
        compatible = "socionext,uniphier-sd-v2.91";
        reg = <0x5a400000 0x200>;
        interrupts = <0 76 4>;
        pinctrl-names = "default", "uhs";
        pinctrl-0 = <&pinctrl_sd>;
        pinctrl-1 = <&pinctrl_sd_uhs>;
        clocks = <&mio_clk 0>;
        reset-names = "host", "bridge";
        resets = <&mio_rst 0>, <&mio_rst 3>;
        dma-names = "rx-tx";
        dmas = <&dmac 4>;
        bus-width = <4>;
        cap-sd-highspeed;
        sd-uhs-sdr12;
        sd-uhs-sdr25;
        sd-uhs-sdr50;
    };