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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/spi/spi-gpio.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: SPI-GPIO devicetree bindings
maintainers:
- Rob Herring <robh@kernel.org>
description:
This represents a group of 3-n GPIO lines used for bit-banged SPI on
dedicated GPIO lines.
allOf:
- $ref: "/schemas/spi/spi-controller.yaml#"
properties:
compatible:
const: spi-gpio
sck-gpios:
description: GPIO spec for the SCK line to use
maxItems: 1
miso-gpios:
description: GPIO spec for the MISO line to use
maxItems: 1
mosi-gpios:
description: GPIO spec for the MOSI line to use
maxItems: 1
cs-gpios:
description: GPIOs to use for chipselect lines.
Not needed if num-chipselects = <0>.
minItems: 1
maxItems: 1024
num-chipselects:
description: Number of chipselect lines. Should be <0> if a single device
with no chip select is connected.
$ref: "/schemas/types.yaml#/definitions/uint32"
# Deprecated properties
gpio-sck: false
gpio-miso: false
gpio-mosi: false
required:
- compatible
- num-chipselects
- sck-gpios
unevaluatedProperties: false
examples:
- |
spi {
compatible = "spi-gpio";
#address-cells = <0x1>;
#size-cells = <0x0>;
sck-gpios = <&gpio 95 0>;
miso-gpios = <&gpio 98 0>;
mosi-gpios = <&gpio 97 0>;
cs-gpios = <&gpio 125 0>;
num-chipselects = <1>;
/* clients */
};
...
|
