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

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

Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml

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# 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>;

            };

    };

Documentation/devicetree/bindings/gpio/gpio-74x164.txt

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* 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>;

};