Commit 71b66001 authored by Rob Herring (Arm)'s avatar Rob Herring (Arm) Committed by Bartosz Golaszewski
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dt-bindings: gpio: Convert lantiq,gpio-mm-lantiq to DT schema 



Convert the Lantiq SoC External Bus memory mapped GPIO binding to DT
schema format. It's a straight forward conversion.

Signed-off-by: default avatarRob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250714202837.3011521-1-robh@kernel.org


Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@linaro.org>
parent aff0a170

Documentation/devicetree/bindings/gpio/gpio-mm-lantiq.txt

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Lantiq SoC External Bus memory mapped GPIO controller



By attaching hardware latches to the EBU it is possible to create output

only gpios. This driver configures a special memory address, which when

written to outputs 16 bit to the latches.



The node describing the memory mapped GPIOs needs to be a child of the node

describing the "lantiq,localbus".



Required properties:

- compatible : Should be "lantiq,gpio-mm-lantiq"

- reg : Address and length of the register set for the device

- #gpio-cells : Should be two.  The first cell is the pin number and

  the second cell is used to specify optional parameters (currently

  unused).

- gpio-controller : Marks the device node as a gpio controller.



Optional properties:

- lantiq,shadow : The default value that we shall assume as already set on the

  shift register cascade.



Example:



localbus@0 {

	#address-cells = <2>;

	#size-cells = <1>;

	ranges = <0 0 0x0 0x3ffffff /* addrsel0 */

		1 0 0x4000000 0x4000010>; /* addsel1 */

	compatible = "lantiq,localbus", "simple-bus";



	gpio_mm0: gpio@4000000 {

		compatible = "lantiq,gpio-mm";

		reg = <1 0x0 0x10>;

		gpio-controller;

		#gpio-cells = <2>;

		lantiq,shadow = <0x77f>

	};

}

Documentation/devicetree/bindings/gpio/lantiq,gpio-mm-lantiq.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/lantiq,gpio-mm-lantiq.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: Lantiq SoC External Bus memory mapped GPIO controller



maintainers:

  - John Crispin <john@phrozen.org>



description: |

  By attaching hardware latches to the EBU it is possible to create output

  only gpios. This driver configures a special memory address, which when

  written to outputs 16 bit to the latches.



  The node describing the memory mapped GPIOs needs to be a child of the node

  describing the "lantiq,localbus".



properties:

  compatible:

    enum:

      - lantiq,gpio-mm-lantiq

      - lantiq,gpio-mm



  reg:

    maxItems: 1



  '#gpio-cells':

    const: 2



  gpio-controller: true



  lantiq,shadow:

    description: The default value that we shall assume as already set on the shift register cascade.

    $ref: /schemas/types.yaml#/definitions/uint32



required:

  - compatible

  - reg

  - '#gpio-cells'

  - gpio-controller



additionalProperties: false



examples:

  - |

    gpio@4000000 {

        compatible = "lantiq,gpio-mm-lantiq";

        reg = <0x4000000 0x10>;

        gpio-controller;

        #gpio-cells = <2>;

        lantiq,shadow = <0x77f>;

    };