Bindings/pinctrl/pincfg-node.yaml

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/pinctrl/pincfg-node.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Generic Pin Configuration Node
   8
   9 maintainers:
  10   - Linus Walleij <linus.walleij@linaro.org>
  11
  12 description:
  13   Many data items that are represented in a pin configuration node are common
  14   and generic. Pin control bindings should use the properties defined below
  15   where they are applicable; not all of these properties are relevant or useful
  16   for all hardware or binding structures. Each individual binding document
  17   should state which of these generic properties, if any, are used, and the
  18   structure of the DT nodes that contain these properties.
  19
  20 properties:
  21   bias-disable:
  22     type: boolean
  23     description: disable any pin bias
  24
  25   bias-high-impedance:
  26     type: boolean
  27     description: high impedance mode ("third-state", "floating")
  28
  29   bias-bus-hold:
  30     type: boolean
  31     description: latch weakly
  32
  33   bias-pull-up:
  34     oneOf:
  35       - type: boolean
  36       - $ref: /schemas/types.yaml#/definitions/uint32
  37     description: pull up the pin. Takes as optional argument on hardware
  38       supporting it the pull strength in Ohm.
  39
  40   bias-pull-down:
  41     oneOf:
  42       - type: boolean
  43       - $ref: /schemas/types.yaml#/definitions/uint32
  44     description: pull down the pin. Takes as optional argument on hardware
  45       supporting it the pull strength in Ohm.
  46
  47   bias-pull-pin-default:
  48     oneOf:
  49       - type: boolean
  50       - $ref: /schemas/types.yaml#/definitions/uint32
  51     description: use pin-default pull state. Takes as optional argument on
  52       hardware supporting it the pull strength in Ohm.
  53
  54   drive-push-pull:
  55     oneOf:
  56       - type: boolean
  57       - $ref: /schemas/types.yaml#/definitions/uint32
  58         enum: [ 0, 1 ]
  59         deprecated: true
  60     description: drive actively high and low
  61
  62   drive-open-drain:
  63     oneOf:
  64       - type: boolean
  65       - $ref: /schemas/types.yaml#/definitions/uint32
  66         const: 1    # No known cases of 0
  67         deprecated: true
  68     description: drive with open drain
  69
  70   drive-open-source:
  71     type: boolean
  72     description: drive with open source
  73
  74   drive-strength:
  75     $ref: /schemas/types.yaml#/definitions/uint32
  76     description: sink or source at most X mA
  77
  78   drive-strength-microamp:
  79     description: sink or source at most X uA
  80
  81   input-enable:
  82     type: boolean
  83     description: enable input on pin (no effect on output, such as
  84       enabling an input buffer)
  85
  86   input-disable:
  87     type: boolean
  88     description: disable input on pin (no effect on output, such as
  89       disabling an input buffer)
  90
  91   input-schmitt-enable:
  92     type: boolean
  93     description: enable schmitt-trigger mode
  94
  95   input-schmitt-disable:
  96     type: boolean
  97     description: disable schmitt-trigger mode
  98
  99   input-debounce:
 100     $ref: /schemas/types.yaml#/definitions/uint32
 101     description: Takes the debounce time in usec as argument or 0 to disable
 102       debouncing
 103
 104   power-source:
 105     $ref: /schemas/types.yaml#/definitions/uint32
 106     description: select between different power supplies
 107
 108   low-power-enable:
 109     type: boolean
 110     description: enable low power mode
 111
 112   low-power-disable:
 113     type: boolean
 114     description: disable low power mode
 115
 116   output-disable:
 117     type: boolean
 118     description: disable output on a pin (such as disable an output buffer)
 119
 120   output-enable:
 121     type: boolean
 122     description: enable output on a pin without actively driving it
 123       (such as enabling an output buffer)
 124
 125   output-impedance-ohms:
 126     description: set the output impedance of a pin to at most X ohms
 127
 128   output-low:
 129     type: boolean
 130     description: set the pin to output mode with low level
 131
 132   output-high:
 133     type: boolean
 134     description: set the pin to output mode with high level
 135
 136   sleep-hardware-state:
 137     type: boolean
 138     description: indicate this is sleep related state which will be
 139       programmed into the registers for the sleep state.
 140
 141   slew-rate:
 142     $ref: /schemas/types.yaml#/definitions/uint32
 143     description: set the slew rate
 144
 145   skew-delay:
 146     $ref: /schemas/types.yaml#/definitions/uint32
 147     description:
 148       this affects the expected clock skew on input pins
 149       and the delay before latching a value to an output
 150       pin. Typically indicates how many double-inverters are
 151       used to delay the signal.
 152
 153 additionalProperties: true