Documentation/devicetree/bindings/spi/arm,pl022-peripheral-props.yaml


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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/spi/arm,pl022-peripheral-props.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Peripheral-specific properties for Arm PL022 SPI controller

maintainers:
  - Linus Walleij <linus.walleij@linaro.org>

select: false

properties:
  pl022,interface:
    description: SPI interface type
    $ref: /schemas/types.yaml#/definitions/uint32
    enum:
      - 0      # SPI
      - 1      # Texas Instruments Synchronous Serial Frame Format
      - 2      # Microwire (Half Duplex)

  pl022,com-mode:
    description: Specifies the transfer mode
    $ref: /schemas/types.yaml#/definitions/uint32
    enum:
      - 0      # interrupt mode
      - 1      # polling mode
      - 2      # DMA mode
    default: 1

  pl022,rx-level-trig:
    description: Rx FIFO watermark level
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 4

  pl022,tx-level-trig:
    description: Tx FIFO watermark level
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 4

  pl022,ctrl-len:
    description: Microwire interface - Control length
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0x03
    maximum: 0x1f

  pl022,wait-state:
    description: Microwire interface - Wait state
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1]

  pl022,duplex:
    description: Microwire interface - Full/Half duplex
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1]

additionalProperties: true
...