Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml

# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/spi/renesas,sh-msiof.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Renesas MSIOF SPI controller

maintainers:
  - Geert Uytterhoeven <geert+renesas@glider.be>

allOf:
  - $ref: spi-controller.yaml#

properties:
  compatible:
    oneOf:
      - items:
          - const: renesas,msiof-sh73a0     # SH-Mobile AG5
          - const: renesas,sh-mobile-msiof  # generic SH-Mobile compatible
                                            # device
      - items:
          - enum:
              - renesas,msiof-r8a7743       # RZ/G1M
              - renesas,msiof-r8a7744       # RZ/G1N
              - renesas,msiof-r8a7745       # RZ/G1E
              - renesas,msiof-r8a77470      # RZ/G1C
              - renesas,msiof-r8a7790       # R-Car H2
              - renesas,msiof-r8a7791       # R-Car M2-W
              - renesas,msiof-r8a7792       # R-Car V2H
              - renesas,msiof-r8a7793       # R-Car M2-N
              - renesas,msiof-r8a7794       # R-Car E2
          - const: renesas,rcar-gen2-msiof  # generic R-Car Gen2 and RZ/G1
                                            # compatible device
      - items:
          - enum:
              - renesas,msiof-r8a774a1      # RZ/G2M
              - renesas,msiof-r8a774b1      # RZ/G2N
              - renesas,msiof-r8a774c0      # RZ/G2E
              - renesas,msiof-r8a7795       # R-Car H3
              - renesas,msiof-r8a7796       # R-Car M3-W
              - renesas,msiof-r8a77965      # R-Car M3-N
              - renesas,msiof-r8a77970      # R-Car V3M
              - renesas,msiof-r8a77980      # R-Car V3H
              - renesas,msiof-r8a77990      # R-Car E3
              - renesas,msiof-r8a77995      # R-Car D3
          - const: renesas,rcar-gen3-msiof  # generic R-Car Gen3 and RZ/G2
                                            # compatible device
      - items:
          - const: renesas,sh-msiof  # deprecated

  reg:
    minItems: 1
    maxItems: 2
    oneOf:
      - items:
          - description: CPU and DMA engine registers
      - items:
          - description: CPU registers
          - description: DMA engine registers

  interrupts:
    maxItems: 1

  clocks:
    maxItems: 1

  num-cs:
    description: |
      Total number of chip selects (default is 1).
      Up to 3 native chip selects are supported:
        0: MSIOF_SYNC
        1: MSIOF_SS1
        2: MSIOF_SS2
      Hardware limitations related to chip selects:
        - Native chip selects are always deasserted in between transfers
          that are part of the same message.  Use cs-gpios to work around
          this.
        - All slaves using native chip selects must use the same spi-cs-high
          configuration.  Use cs-gpios to work around this.
        - When using GPIO chip selects, at least one native chip select must
          be left unused, as it will be driven anyway.
    minimum: 1
    maximum: 3
    default: 1

  dmas:
    minItems: 2
    maxItems: 4

  dma-names:
    minItems: 2
    maxItems: 4
    items:
      enum: [ tx, rx ]

  renesas,dtdl:
    description: delay sync signal (setup) in transmit mode.
    allOf:
      - $ref: /schemas/types.yaml#/definitions/uint32
      - enum:
          - 0    # no bit delay
          - 50   # 0.5-clock-cycle delay
          - 100  # 1-clock-cycle delay
          - 150  # 1.5-clock-cycle delay
          - 200  # 2-clock-cycle delay

  renesas,syncdl:
    description: delay sync signal (hold) in transmit mode
    allOf:
      - $ref: /schemas/types.yaml#/definitions/uint32
      - enum:
          - 0    # no bit delay
          - 50   # 0.5-clock-cycle delay
          - 100  # 1-clock-cycle delay
          - 150  # 1.5-clock-cycle delay
          - 200  # 2-clock-cycle delay
          - 300  # 3-clock-cycle delay

  renesas,tx-fifo-size:
    # deprecated for soctype-specific bindings
    description: |
      Override the default TX fifo size.  Unit is words.  Ignored if 0.
    allOf:
      - $ref: /schemas/types.yaml#/definitions/uint32
      - maxItems: 1
    default: 64

  renesas,rx-fifo-size:
    # deprecated for soctype-specific bindings
    description: |
      Override the default RX fifo size.  Unit is words.  Ignored if 0.
    allOf:
      - $ref: /schemas/types.yaml#/definitions/uint32
      - maxItems: 1
    default: 64

required:
  - compatible
  - reg
  - interrupts
  - '#address-cells'
  - '#size-cells'

examples:
  - |
    #include <dt-bindings/clock/r8a7791-clock.h>
    #include <dt-bindings/interrupt-controller/irq.h>

    msiof0: spi@e6e20000 {
        compatible = "renesas,msiof-r8a7791", "renesas,rcar-gen2-msiof";
        reg = <0 0xe6e20000 0 0x0064>;
        interrupts = <0 156 IRQ_TYPE_LEVEL_HIGH>;
        clocks = <&mstp0_clks R8A7791_CLK_MSIOF0>;
        dmas = <&dmac0 0x51>, <&dmac0 0x52>;
        dma-names = "tx", "rx";
        #address-cells = <1>;
        #size-cells = <0>;
    };