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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/input/fsl,mpr121-touchkey.yaml
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)

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%YAML 1.2

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---

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$id: http://devicetree.org/schemas/input/fsl,mpr121-touchkey.yaml#

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

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title: Freescale MPR121 capacitive touch sensor controller

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maintainers:

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  - Dmitry Torokhov <dmitry.torokhov@gmail.com>

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description: |

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  The MPR121 supports up to 12 completely independent electrodes/capacitance

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  sensing inputs in which 8 are multifunctional for LED driving and GPIO.

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  https://www.nxp.com/docs/en/data-sheet/MPR121.pdf

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allOf:

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  - $ref: input.yaml#

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anyOf:

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  - required: [ interrupts ]

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  - required: [ poll-interval ]

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properties:

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  compatible:

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    const: fsl,mpr121-touchkey

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  reg:

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    maxItems: 1

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  interrupts:

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    maxItems: 1

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  vdd-supply: true

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  linux,keycodes:

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    minItems: 1

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    maxItems: 12

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  wakeup-source:

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    description: Use any event on keypad as wakeup event.

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    type: boolean

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required:

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  - compatible

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  - reg

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  - vdd-supply

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  - linux,keycodes

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unevaluatedProperties: false

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examples:

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  - |

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    // Example with interrupts

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    #include "dt-bindings/input/input.h"

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    i2c {

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        #address-cells = <1>;

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        #size-cells = <0>;

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        touchkey@5a {

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            compatible = "fsl,mpr121-touchkey";

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            reg = <0x5a>;

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            interrupt-parent = <&gpio1>;

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            interrupts = <28 2>;

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            autorepeat;

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            vdd-supply = <&ldo4_reg>;

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            linux,keycodes = <KEY_0>, <KEY_1>, <KEY_2>, <KEY_3>,

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                             <KEY_4>, <KEY_5>, <KEY_6>, <KEY_7>,

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                             <KEY_8>, <KEY_9>, <KEY_A>, <KEY_B>;

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        };

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    };

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  - |

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    // Example with polling

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    #include "dt-bindings/input/input.h"

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    i2c {

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        #address-cells = <1>;

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        #size-cells = <0>;

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        touchkey@5a {

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            compatible = "fsl,mpr121-touchkey";

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            reg = <0x5a>;

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            poll-interval = <20>;

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            autorepeat;

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            vdd-supply = <&ldo4_reg>;

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            linux,keycodes = <KEY_0>, <KEY_1>, <KEY_2>, <KEY_3>,

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                             <KEY_4>, <KEY_5>, <KEY_6>, <KEY_7>,

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                             <KEY_8>, <KEY_9>, <KEY_A>, <KEY_B>;

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        };

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    };

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