154 lines
4.3 KiB
YAML
154 lines
4.3 KiB
YAML
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# SPDX-License-Identifier: GPL-2.0-only
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/pinctrl/pincfg-node.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Generic pin configuration node schema
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maintainers:
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- Linus Walleij <linus.walleij@linaro.org>
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description:
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Many data items that are represented in a pin configuration node are common
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and generic. Pin control bindings should use the properties defined below
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where they are applicable; not all of these properties are relevant or useful
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for all hardware or binding structures. Each individual binding document
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should state which of these generic properties, if any, are used, and the
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structure of the DT nodes that contain these properties.
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properties:
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bias-disable:
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type: boolean
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description: disable any pin bias
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bias-high-impedance:
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type: boolean
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description: high impedance mode ("third-state", "floating")
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bias-bus-hold:
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type: boolean
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description: latch weakly
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bias-pull-up:
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oneOf:
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- type: boolean
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- $ref: /schemas/types.yaml#/definitions/uint32
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description: pull up the pin. Takes as optional argument on hardware
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supporting it the pull strength in Ohm.
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bias-pull-down:
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oneOf:
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- type: boolean
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- $ref: /schemas/types.yaml#/definitions/uint32
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description: pull down the pin. Takes as optional argument on hardware
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supporting it the pull strength in Ohm.
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bias-pull-pin-default:
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oneOf:
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- type: boolean
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- $ref: /schemas/types.yaml#/definitions/uint32
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description: use pin-default pull state. Takes as optional argument on
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hardware supporting it the pull strength in Ohm.
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drive-push-pull:
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oneOf:
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- type: boolean
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- $ref: /schemas/types.yaml#/definitions/uint32
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enum: [ 0, 1 ]
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deprecated: true
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description: drive actively high and low
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drive-open-drain:
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oneOf:
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- type: boolean
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- $ref: /schemas/types.yaml#/definitions/uint32
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const: 1 # No known cases of 0
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deprecated: true
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description: drive with open drain
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drive-open-source:
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type: boolean
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description: drive with open source
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drive-strength:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: sink or source at most X mA
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drive-strength-microamp:
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description: sink or source at most X uA
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input-enable:
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type: boolean
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description: enable input on pin (no effect on output, such as
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enabling an input buffer)
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input-disable:
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type: boolean
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description: disable input on pin (no effect on output, such as
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disabling an input buffer)
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input-schmitt-enable:
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type: boolean
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description: enable schmitt-trigger mode
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input-schmitt-disable:
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type: boolean
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description: disable schmitt-trigger mode
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input-debounce:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: Takes the debounce time in usec as argument or 0 to disable
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debouncing
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power-source:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: select between different power supplies
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low-power-enable:
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type: boolean
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description: enable low power mode
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low-power-disable:
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type: boolean
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description: disable low power mode
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output-disable:
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type: boolean
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description: disable output on a pin (such as disable an output buffer)
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output-enable:
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type: boolean
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description: enable output on a pin without actively driving it
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(such as enabling an output buffer)
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output-impedance-ohms:
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description: set the output impedance of a pin to at most X ohms
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output-low:
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type: boolean
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description: set the pin to output mode with low level
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output-high:
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type: boolean
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description: set the pin to output mode with high level
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sleep-hardware-state:
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type: boolean
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description: indicate this is sleep related state which will be
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programmed into the registers for the sleep state.
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slew-rate:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: set the slew rate
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skew-delay:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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this affects the expected clock skew on input pins
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and the delay before latching a value to an output
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pin. Typically indicates how many double-inverters are
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used to delay the signal.
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additionalProperties: true
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