Commit 97266c4d authored by Rob Herring's avatar Rob Herring Committed by Mark Brown

spi: dt-bindings: Convert spi-gpio binding to json-schema

Convert the spi-gpio binding to DT schema format.

Cc: Mark Brown <broonie@kernel.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-spi@vger.kernel.org
Signed-off-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 101e6fce
SPI-GPIO devicetree bindings
This represents a group of 3-n GPIO lines used for bit-banged SPI on dedicated
GPIO lines.
Required properties:
- compatible: should be set to "spi-gpio"
- #address-cells: should be set to <0x1>
- ranges
- sck-gpios: GPIO spec for the SCK line to use
- miso-gpios: GPIO spec for the MISO line to use
- mosi-gpios: GPIO spec for the MOSI line to use
- cs-gpios: GPIOs to use for chipselect lines.
Not needed if num-chipselects = <0>.
- num-chipselects: Number of chipselect lines. Should be <0> if a single device
with no chip select is connected.
Deprecated bindings:
These legacy GPIO line bindings can alternatively be used to define the
GPIO lines used, they should not be used in new device trees.
- gpio-sck: GPIO spec for the SCK line to use
- gpio-miso: GPIO spec for the MISO line to use
- gpio-mosi: GPIO spec for the MOSI line to use
Example:
spi {
compatible = "spi-gpio";
#address-cells = <0x1>;
ranges;
sck-gpios = <&gpio 95 0>;
miso-gpios = <&gpio 98 0>;
mosi-gpios = <&gpio 97 0>;
cs-gpios = <&gpio 125 0>;
num-chipselects = <1>;
/* clients */
};
# 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
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 */
};
...
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