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