dt-bindings: gpio: Convert mxs to json-schema

* Freescale MXS GPIO controller

The Freescale MXS GPIO controller is part of MXS PIN controller.  The

GPIOs are organized in port/bank.  Each port consists of 32 GPIOs.

As the GPIO controller is embedded in the PIN controller and all the

GPIO ports share the same IO space with PIN controller, the GPIO node

will be represented as sub-nodes of MXS pinctrl node.

Required properties for GPIO node:

- compatible : Should be "fsl,<soc>-gpio".  The supported SoCs include

  imx23 and imx28.

- interrupts : Should be the port interrupt shared by all 32 pins.

- 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

- interrupt-controller: Marks the device node as an interrupt controller.

- #interrupt-cells : Should be 2.  The first cell is the GPIO number.

  The second cell bits[3:0] is used to specify trigger type and level flags:

      1 = low-to-high edge triggered.

      2 = high-to-low edge triggered.

      4 = active high level-sensitive.

      8 = active low level-sensitive.

Note: Each GPIO port should have an alias correctly numbered in "aliases"

node.

Examples:

aliases {

	gpio0 = &gpio0;

	gpio1 = &gpio1;

	gpio2 = &gpio2;

	gpio3 = &gpio3;

	gpio4 = &gpio4;

};

pinctrl@80018000 {

	compatible = "fsl,imx28-pinctrl", "simple-bus";

	reg = <0x80018000 2000>;

	gpio0: gpio@0 {

		compatible = "fsl,imx28-gpio";

		interrupts = <127>;

		gpio-controller;

		#gpio-cells = <2>;

		interrupt-controller;

		#interrupt-cells = <2>;

	};

	gpio1: gpio@1 {

		compatible = "fsl,imx28-gpio";

		interrupts = <126>;

		gpio-controller;

		#gpio-cells = <2>;

		interrupt-controller;

		#interrupt-cells = <2>;

	};

	gpio2: gpio@2 {

		compatible = "fsl,imx28-gpio";

		interrupts = <125>;

		gpio-controller;

		#gpio-cells = <2>;

		interrupt-controller;

		#interrupt-cells = <2>;

	};

	gpio3: gpio@3 {

		compatible = "fsl,imx28-gpio";

		interrupts = <124>;

		gpio-controller;

		#gpio-cells = <2>;

		interrupt-controller;

		#interrupt-cells = <2>;

	};

	gpio4: gpio@4 {

		compatible = "fsl,imx28-gpio";

		interrupts = <123>;

		gpio-controller;

		#gpio-cells = <2>;

		interrupt-controller;

		#interrupt-cells = <2>;

	};

};

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/gpio/gpio-mxs.yaml#

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

title: Freescale MXS GPIO controller

maintainers:

  - Shawn Guo <shawn.guo@linaro.org>

  - Anson Huang <Anson.Huang@nxp.com>

description: |

  The Freescale MXS GPIO controller is part of MXS PIN controller.

  The GPIOs are organized in port/bank, each port consists of 32 GPIOs.

  As the GPIO controller is embedded in the PIN controller and all the

  GPIO ports share the same IO space with PIN controller, the GPIO node

  will be represented as sub-nodes of MXS pinctrl node.

properties:

  compatible:

    enum:

      - fsl,imx23-pinctrl

      - fsl,imx28-pinctrl

  '#address-cells':

    const: 1

  '#size-cells':

    const: 0

  reg:

    maxItems: 1

patternProperties:

  "gpio@[0-9]+$":

    type: object

    properties:

      compatible:

        enum:

          - fsl,imx23-gpio

          - fsl,imx28-gpio

      reg:

        maxItems: 1

      interrupts:

        description: Should be the port interrupt shared by all 32 pins.

        maxItems: 1

      interrupt-controller: true

      "#interrupt-cells":

        const: 2

      "#gpio-cells":

        const: 2

      gpio-controller: true

    required:

      - compatible

      - reg

      - interrupts

      - interrupt-controller

      - "#interrupt-cells"

      - "#gpio-cells"

      - gpio-controller

    additionalProperties: false

required:

  - compatible

  - reg

  - '#address-cells'

  - '#size-cells'

additionalProperties: false

examples:

  - |

    pinctrl@80018000 {

        #address-cells = <1>;

        #size-cells = <0>;

        compatible = "fsl,imx28-pinctrl";

        reg = <0x80018000 0x2000>;

        gpio@0 {

                compatible = "fsl,imx28-gpio";

                reg = <0>;

                interrupts = <127>;

                gpio-controller;

                #gpio-cells = <2>;

                interrupt-controller;

                #interrupt-cells = <2>;

        };

        gpio@1 {

                compatible = "fsl,imx28-gpio";

                reg = <1>;

                interrupts = <126>;

                gpio-controller;

                #gpio-cells = <2>;

                interrupt-controller;

                #interrupt-cells = <2>;

        };

        gpio@2 {

                compatible = "fsl,imx28-gpio";

                reg = <2>;

                interrupts = <125>;

                gpio-controller;

                #gpio-cells = <2>;

                interrupt-controller;

                #interrupt-cells = <2>;

        };

        gpio@3 {

                compatible = "fsl,imx28-gpio";

                reg = <3>;

                interrupts = <124>;

                gpio-controller;

                #gpio-cells = <2>;

                interrupt-controller;

                #interrupt-cells = <2>;

        };

        gpio@4 {

                compatible = "fsl,imx28-gpio";

                reg = <4>;

                interrupts = <123>;

                gpio-controller;

                #gpio-cells = <2>;

                interrupt-controller;

                #interrupt-cells = <2>;

        };

    };