Input: atmel_mxt_ts - convert bindings to YAML and extend

Atmel maXTouch touchscreen/touchpad

Required properties:

- compatible:

    atmel,maxtouch

    The following compatibles have been used in various products but are

    deprecated:

	atmel,qt602240_ts

	atmel,atmel_mxt_ts

	atmel,atmel_mxt_tp

	atmel,mXT224

- reg: The I2C address of the device

- interrupts: The sink for the touchpad's IRQ output

    See ../interrupt-controller/interrupts.txt

Optional properties for main touchpad device:

- linux,gpio-keymap: When enabled, the SPT_GPIOPWN_T19 object sends messages

    on GPIO bit changes. An array of up to 8 entries can be provided

    indicating the Linux keycode mapped to each bit of the status byte,

    starting at the LSB. Linux keycodes are defined in

    <dt-bindings/input/input.h>.

    Note: the numbering of the GPIOs and the bit they start at varies between

    maXTouch devices. You must either refer to the documentation, or

    experiment to determine which bit corresponds to which input. Use

    KEY_RESERVED for unused padding values.

- reset-gpios: GPIO specifier for the touchscreen's reset pin (active low)

Example:

	touch@4b {

		compatible = "atmel,maxtouch";

		reg = <0x4b>;

		interrupt-parent = <&gpio>;

		interrupts = <TEGRA_GPIO(W, 3) IRQ_TYPE_LEVEL_LOW>;

	};

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/input/atmel,maxtouch.yaml#

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

title: Atmel maXTouch touchscreen/touchpad

maintainers:

  - Nick Dyer <nick@shmanahar.org>

  - Linus Walleij <linus.walleij@linaro.org>

description: |

  Atmel maXTouch touchscreen or touchpads such as the mXT244

  and similar devices.

properties:

  compatible:

    const: atmel,maxtouch

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  vdda-supply:

    description:

      Optional regulator for the AVDD analog voltage.

  vdd-supply:

    description:

      Optional regulator for the VDD digital voltage.

  reset-gpios:

    maxItems: 1

    description:

      Optional GPIO specifier for the touchscreen's reset pin

      (active low). The line must be flagged with

      GPIO_ACTIVE_LOW.

  linux,gpio-keymap:

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

    description: |

      When enabled, the SPT_GPIOPWN_T19 object sends messages

      on GPIO bit changes. An array of up to 8 entries can be provided

      indicating the Linux keycode mapped to each bit of the status byte,

      starting at the LSB. Linux keycodes are defined in

      <dt-bindings/input/input.h>.

      Note: the numbering of the GPIOs and the bit they start at varies

      between maXTouch devices. You must either refer to the documentation,

      or experiment to determine which bit corresponds to which input. Use

      KEY_RESERVED for unused padding values.

required:

  - compatible

  - reg

  - interrupts

additionalProperties: false

examples:

  - |

    #include <dt-bindings/interrupt-controller/irq.h>

    #include <dt-bindings/gpio/gpio.h>

    i2c {

      #address-cells = <1>;

      #size-cells = <0>;

      touchscreen@4a {

        compatible = "atmel,maxtouch";

        reg = <0x4a>;

        interrupt-parent = <&gpio>;

        interrupts = <26 IRQ_TYPE_EDGE_FALLING>;

        reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>;

        vdda-supply = <&ab8500_ldo_aux2_reg>;

        vdd-supply = <&ab8500_ldo_aux5_reg>;

      };

    };

...

M:	Nick Dyer <nick@shmanahar.org>

S:	Maintained

T:	git git://github.com/ndyer/linux.git

F:	Documentation/devicetree/bindings/input/atmel,maxtouch.txt

F:	Documentation/devicetree/bindings/input/atmel,maxtouch.yaml

F:	drivers/input/touchscreen/atmel_mxt_ts.c

ATMEL WIRELESS DRIVER