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

   1 # SPDX-License-Identifier: GPL-2.0
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/spi/arm,pl022-peripheral-props.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Peripheral-specific properties for Arm PL022 SPI controller
   8
   9 maintainers:
  10   - Linus Walleij <linus.walleij@linaro.org>
  11
  12 select: false
  13
  14 properties:
  15   pl022,interface:
  16     description: SPI interface type
  17     $ref: /schemas/types.yaml#/definitions/uint32
  18     enum:
  19       - 0      # SPI
  20       - 1      # Texas Instruments Synchronous Serial Frame Format
  21       - 2      # Microwire (Half Duplex)
  22
  23   pl022,com-mode:
  24     description: Specifies the transfer mode
  25     $ref: /schemas/types.yaml#/definitions/uint32
  26     enum:
  27       - 0      # interrupt mode
  28       - 1      # polling mode
  29       - 2      # DMA mode
  30     default: 1
  31
  32   pl022,rx-level-trig:
  33     description: Rx FIFO watermark level
  34     $ref: /schemas/types.yaml#/definitions/uint32
  35     minimum: 0
  36     maximum: 4
  37
  38   pl022,tx-level-trig:
  39     description: Tx FIFO watermark level
  40     $ref: /schemas/types.yaml#/definitions/uint32
  41     minimum: 0
  42     maximum: 4
  43
  44   pl022,ctrl-len:
  45     description: Microwire interface - Control length
  46     $ref: /schemas/types.yaml#/definitions/uint32
  47     minimum: 0x03
  48     maximum: 0x1f
  49
  50   pl022,wait-state:
  51     description: Microwire interface - Wait state
  52     $ref: /schemas/types.yaml#/definitions/uint32
  53     enum: [0, 1]
  54
  55   pl022,duplex:
  56     description: Microwire interface - Full/Half duplex
  57     $ref: /schemas/types.yaml#/definitions/uint32
  58     enum: [0, 1]
  59
  60 additionalProperties: true
  61 ...