Commit 56b01acc authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Bartosz Golaszewski

dt-bindings: gpio: fairchild,74hc595: Convert to json-schema

Convert the Generic 8-bit shift register Device Tree binding
documentation to json-schema.

Rename from gpio-74x164 to fairchild,74hc595, as the former refers to
the Linux driver, and not to a hardware name.
Add the missing hog description.
Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarBartosz Golaszewski <bgolaszewski@baylibre.com>
parent 5fe70673
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/gpio/fairchild,74hc595.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Generic 8-bit shift register
maintainers:
- Maxime Ripard <mripard@kernel.org>
properties:
compatible:
enum:
- fairchild,74hc595
- nxp,74lvc594
reg:
maxItems: 1
gpio-controller: true
'#gpio-cells':
description:
The second cell is only used to specify the GPIO polarity.
const: 2
registers-number:
description: Number of daisy-chained shift registers
enable-gpios:
description: GPIO connected to the OE (Output Enable) pin.
maxItems: 1
spi-max-frequency: true
patternProperties:
"^(hog-[0-9]+|.+-hog(-[0-9]+)?)$":
type: object
properties:
gpio-hog: true
gpios: true
output-high: true
output-low: true
line-name: true
required:
- gpio-hog
- gpios
additionalProperties: false
required:
- compatible
- reg
- gpio-controller
- '#gpio-cells'
- registers-number
additionalProperties: false
examples:
- |
spi {
#address-cells = <1>;
#size-cells = <0>;
gpio5: gpio5@0 {
compatible = "fairchild,74hc595";
reg = <0>;
gpio-controller;
#gpio-cells = <2>;
registers-number = <4>;
spi-max-frequency = <100000>;
};
};
* Generic 8-bits shift register GPIO driver
Required properties:
- compatible: Should contain one of the following:
"fairchild,74hc595"
"nxp,74lvc594"
- reg : chip select number
- gpio-controller : Marks the device node as a gpio controller.
- #gpio-cells : Should be two. The first cell is the pin number and
the second cell is used to specify the gpio polarity:
0 = active high
1 = active low
- registers-number: Number of daisy-chained shift registers
Optional properties:
- enable-gpios: GPIO connected to the OE (Output Enable) pin.
Example:
gpio5: gpio5@0 {
compatible = "fairchild,74hc595";
reg = <0>;
gpio-controller;
#gpio-cells = <2>;
registers-number = <4>;
spi-max-frequency = <100000>;
};
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