mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 00:48:50 +00:00
7388fa8acf
On RZ/G2L SoC for Group-B pins, output impedance can be configured. This patch documents "output-impedance-ohms" property in pincfg-node.yaml so that other platforms requiring such feature can make use of this property. Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com> Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20211027134509.5036-2-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
145 lines
4 KiB
YAML
145 lines
4 KiB
YAML
# 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 schema
|
|
|
|
maintainers:
|
|
- Linus Walleij <linus.walleij@linaro.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:
|
|
type: boolean
|
|
description: drive actively high and low
|
|
|
|
drive-open-drain:
|
|
type: boolean
|
|
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-debounce:
|
|
$ref: /schemas/types.yaml#/definitions/uint32
|
|
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.
|
|
|
|
additionalProperties: true
|