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

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

Documentation/devicetree/bindings/spi/spi-gpio.txt

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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 */

	};

Documentation/devicetree/bindings/spi/spi-gpio.yaml

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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



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 */

    };



...