Commit cdb51323 authored by Alistair Francis's avatar Alistair Francis Committed by Dmitry Torokhov
Browse files

dt-bindings: input: Add Cypress TT21000 touchscreen controller 



Add the Cypress TrueTouch Generation 5 touchscreen device tree bindings
documentation. It can use I2C or SPI bus.
This touchscreen can handle some defined zone that are designed and
sent as button. To be able to customize the keycode sent, the
"linux,code" property in a "button" sub-node can be used.

Signed-off-by: default avatarAlistair Francis <alistair@alistair23.me>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221026114908.191472-3-alistair@alistair23.me


Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 66603243

Documentation/devicetree/bindings/input/touchscreen/cypress,tt21000.yaml

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/input/touchscreen/cypress,tt21000.yaml#

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



title: Cypress TT21000 touchscreen controller



description: The Cypress TT21000 series (also known as "CYTTSP5" after

  the marketing name Cypress TrueTouch Standard Product series 5).



maintainers:

  - Alistair Francis <alistair@alistair23.me>



allOf:

  - $ref: touchscreen.yaml#



properties:

  compatible:

    const: cypress,tt21000



  reg:

    maxItems: 1



  '#address-cells':

    const: 1



  '#size-cells':

    const: 0



  interrupts:

    maxItems: 1



  vdd-supply:

    description: Regulator for voltage.



  reset-gpios:

    maxItems: 1



  linux,keycodes:

    description: EV_ABS specific event code generated by the axis.



patternProperties:

  "^button@[0-9]+$":

    type: object

    $ref: ../input.yaml#

    properties:

      reg:

        maxItems: 1

      linux,keycodes:

        description: Keycode to emit



    required:

      - reg

      - linux,keycodes



    additionalProperties: false



required:

  - compatible

  - reg

  - interrupts

  - vdd-supply



unevaluatedProperties: false



examples:

  - |

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

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

    #include <dt-bindings/input/linux-event-codes.h>



    i2c {

        #address-cells = <1>;

        #size-cells = <0>;



        touchscreen@24 {

            #address-cells = <1>;

            #size-cells = <0>;



            compatible = "cypress,tt21000";

            reg = <0x24>;

            pinctrl-names = "default";

            pinctrl-0 = <&tp_reset_ds203>;

            interrupt-parent = <&pio>;

            interrupts = <1 5 IRQ_TYPE_LEVEL_LOW>;

            reset-gpios = <&pio 7 1 GPIO_ACTIVE_LOW>;

            vdd-supply = <&reg_touch>;



            button@0 {

                reg = <0>;

                linux,keycodes = <KEY_HOMEPAGE>;

            };



            button@1 {

                reg = <1>;

                linux,keycodes = <KEY_MENU>;

            };



            button@2 {

                reg = <2>;

                linux,keycodes = <KEY_BACK>;

            };

        };

    };

...