xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/input/touchscreen/azoteq,iqs7211.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/input/touchscreen/azoteq,iqs7211.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Azoteq IQS7210A/7211A/E Trackpad/Touchscreen Controller

maintainers:
  - Jeff LaBundy <jeff@labundy.com>

description: |
  The Azoteq IQS7210A, IQS7211A and IQS7211E trackpad and touchscreen control-
  lers employ projected-capacitance sensing and can track two contacts.

  Link to datasheets: https://www.azoteq.com/

properties:
  compatible:
    enum:
      - azoteq,iqs7210a
      - azoteq,iqs7211a
      - azoteq,iqs7211e

  reg:
    maxItems: 1

  irq-gpios:
    maxItems: 1
    description:
      Specifies the GPIO connected to the device's active-low RDY output. The
      pin doubles as the IQS7211E's active-low MCLR input, in which case this
      GPIO must be configured as open-drain.

  reset-gpios:
    maxItems: 1
    description:
      Specifies the GPIO connected to the device's active-low MCLR input. The
      device is temporarily held in hardware reset prior to initialization if
      this property is present.

  azoteq,forced-comms:
    type: boolean
    description:
      Enables forced communication; to be used with host adapters that cannot
      tolerate clock stretching.

  azoteq,forced-comms-default:
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1]
    description:
      Indicates if the device's OTP memory enables (1) or disables (0) forced
      communication by default. Specifying this property can expedite startup
      time if the default value is known.

      If this property is not specified, communication is not initiated until
      the device asserts its RDY pin shortly after exiting hardware reset. At
      that point, forced communication is either enabled or disabled based on
      the presence or absence of the 'azoteq,forced-comms' property.

  azoteq,rate-active-ms:
    minimum: 0
    maximum: 65535
    description: Specifies the report rate (in ms) during active mode.

  azoteq,rate-touch-ms:
    minimum: 0
    maximum: 65535
    description: Specifies the report rate (in ms) during idle-touch mode.

  azoteq,rate-idle-ms:
    minimum: 0
    maximum: 65535
    description: Specifies the report rate (in ms) during idle mode.

  azoteq,rate-lp1-ms:
    minimum: 0
    maximum: 65535
    description: Specifies the report rate (in ms) during low-power mode 1.

  azoteq,rate-lp2-ms:
    minimum: 0
    maximum: 65535
    description: Specifies the report rate (in ms) during low-power mode 2.

  azoteq,timeout-active-ms:
    multipleOf: 1000
    minimum: 0
    maximum: 65535000
    description:
      Specifies the length of time (in ms) to wait for an event before moving
      from active mode to idle or idle-touch modes.

  azoteq,timeout-touch-ms:
    multipleOf: 1000
    minimum: 0
    maximum: 65535000
    description:
      Specifies the length of time (in ms) to wait for an event before moving
      from idle-touch mode to idle mode.

  azoteq,timeout-idle-ms:
    multipleOf: 1000
    minimum: 0
    maximum: 65535000
    description:
      Specifies the length of time (in ms) to wait for an event before moving
      from idle mode to low-power mode 1.

  azoteq,timeout-lp1-ms:
    multipleOf: 1000
    minimum: 0
    maximum: 65535000
    description:
      Specifies the length of time (in ms) to wait for an event before moving
      from low-power mode 1 to low-power mode 2.

  azoteq,timeout-lp2-ms:
    multipleOf: 1000
    minimum: 0
    maximum: 60000
    description:
      Specifies the rate (in ms) at which the trackpad reference values
      are updated during low-power modes 1 and 2.

  azoteq,timeout-ati-ms:
    multipleOf: 1000
    minimum: 0
    maximum: 60000
    description:
      Specifies the delay (in ms) before the automatic tuning implementation
      (ATI) is retried in the event it fails to complete.

  azoteq,timeout-comms-ms:
    minimum: 0
    maximum: 65535
    description:
      Specifies the delay (in ms) before a communication window is closed.

  azoteq,timeout-press-ms:
    multipleOf: 1000
    minimum: 0
    maximum: 60000
    description:
      Specifies the length of time (in ms) to wait before automatically
      releasing a press event. Specify zero to allow the press state to
      persist indefinitely.

  azoteq,fosc-freq:
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [0, 1]
    description: |
      Specifies the device's core clock frequency as follows:
      0: 14 MHz
      1: 18 MHz

  azoteq,fosc-trim:
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 15
    description: Specifies the device's core clock frequency trim.

  azoteq,num-contacts:
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 2
    default: 0
    description: Specifies the number of contacts reported by the device.

  azoteq,contact-split:
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 255
    description: Specifies the contact (finger) split factor.

  azoteq,trim-x:
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 255
    description: Specifies the horizontal trim width.

  azoteq,trim-y:
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 255
    description: Specifies the vertical trim height.

  trackpad:
    type: object
    description: Represents all channels associated with the trackpad.

    properties:
      azoteq,rx-enable:
        $ref: /schemas/types.yaml#/definitions/uint32-array
        minItems: 1
        maxItems: 8
        items:
          minimum: 0
          maximum: 7
        description:
          Specifies the order of the CRx pin(s) associated with the trackpad.

      azoteq,tx-enable:
        $ref: /schemas/types.yaml#/definitions/uint32-array
        minItems: 1
        maxItems: 12
        items:
          minimum: 0
          maximum: 11
        description:
          Specifies the order of the CTx pin(s) associated with the trackpad.

      azoteq,channel-select:
        $ref: /schemas/types.yaml#/definitions/uint32-array
        minItems: 1
        maxItems: 36
        items:
          minimum: 0
          maximum: 255
        description: |
          Specifies the channels mapped to each cycle in the following order:
          Cycle 0, slot 0
          Cycle 0, slot 1
          Cycle 1, slot 0
          Cycle 1, slot 1
          ...and so on. Specify 255 to disable a given slot.

      azoteq,ati-frac-div-fine:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 31
        description: Specifies the trackpad's ATI fine fractional divider.

      azoteq,ati-frac-mult-coarse:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 15
        description: Specifies the trackpad's ATI coarse fractional multiplier.

      azoteq,ati-frac-div-coarse:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 31
        description: Specifies the trackpad's ATI coarse fractional divider.

      azoteq,ati-comp-div:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 31
        description: Specifies the trackpad's ATI compensation divider.

      azoteq,ati-target:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 65535
        description: Specifies the trackpad's ATI target.

      azoteq,touch-enter:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the trackpad's touch entrance factor.

      azoteq,touch-exit:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the trackpad's touch exit factor.

      azoteq,thresh:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the trackpad's stationary touch threshold.

      azoteq,conv-period:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the trackpad's conversion period.

      azoteq,conv-frac:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the trackpad's conversion frequency fraction.

    patternProperties:
      "^event-(tap(-double|-triple)?|hold|palm|swipe-(x|y)-(pos|neg)(-hold)?)$":
        type: object
        $ref: ../input.yaml#
        description:
          Represents a gesture event reported by the trackpad. In the case of
          axial gestures, the duration or distance specified in one direction
          applies to both directions along the same axis.

        properties:
          linux,code: true

          azoteq,gesture-max-ms:
            minimum: 0
            maximum: 65535
            description: Specifies the maximum duration of tap/swipe gestures.

          azoteq,gesture-mid-ms:
            minimum: 0
            maximum: 65535
            description:
              Specifies the maximum duration between subsequent tap gestures
              (IQS7211E only).

          azoteq,gesture-min-ms:
            minimum: 0
            maximum: 65535
            description: Specifies the minimum duration of hold gestures.

          azoteq,gesture-dist:
            $ref: /schemas/types.yaml#/definitions/uint32
            minimum: 0
            maximum: 65535
            description:
              Specifies the minimum (swipe) or maximum (tap and hold) distance
              a finger may travel to be considered a gesture.

          azoteq,gesture-dist-rep:
            $ref: /schemas/types.yaml#/definitions/uint32
            minimum: 0
            maximum: 65535
            description:
              Specifies the minimum distance a finger must travel to elicit a
              repeated swipe gesture (IQS7211E only).

          azoteq,gesture-angle:
            $ref: /schemas/types.yaml#/definitions/uint32
            minimum: 0
            maximum: 75
            description:
              Specifies the maximum angle (in degrees) a finger may travel to
              be considered a swipe gesture.

          azoteq,thresh:
            $ref: /schemas/types.yaml#/definitions/uint32
            minimum: 0
            maximum: 42
            description: Specifies the palm gesture threshold (IQS7211E only).

        additionalProperties: false

    dependencies:
      azoteq,rx-enable: ["azoteq,tx-enable"]
      azoteq,tx-enable: ["azoteq,rx-enable"]
      azoteq,channel-select: ["azoteq,rx-enable"]

    additionalProperties: false

  alp:
    type: object
    $ref: ../input.yaml#
    description: Represents the alternate low-power channel (ALP).

    properties:
      azoteq,rx-enable:
        $ref: /schemas/types.yaml#/definitions/uint32-array
        minItems: 1
        maxItems: 8
        items:
          minimum: 0
          maximum: 7
        description:
          Specifies the CRx pin(s) associated with the ALP in no particular
          order.

      azoteq,tx-enable:
        $ref: /schemas/types.yaml#/definitions/uint32-array
        minItems: 1
        maxItems: 12
        items:
          minimum: 0
          maximum: 11
        description:
          Specifies the CTx pin(s) associated with the ALP in no particular
          order.

      azoteq,ati-frac-div-fine:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 31
        description: Specifies the ALP's ATI fine fractional divider.

      azoteq,ati-frac-mult-coarse:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 15
        description: Specifies the ALP's ATI coarse fractional multiplier.

      azoteq,ati-frac-div-coarse:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 31
        description: Specifies the ALP's ATI coarse fractional divider.

      azoteq,ati-comp-div:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 31
        description: Specifies the ALP's ATI compensation divider.

      azoteq,ati-target:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 65535
        description: Specifies the ALP's ATI target.

      azoteq,ati-base:
        $ref: /schemas/types.yaml#/definitions/uint32
        multipleOf: 8
        minimum: 0
        maximum: 255
        description: Specifies the ALP's ATI base.

      azoteq,ati-mode:
        $ref: /schemas/types.yaml#/definitions/uint32
        enum: [0, 1]
        description: |
          Specifies the ALP's ATI mode as follows:
          0: Partial
          1: Full

      azoteq,sense-mode:
        $ref: /schemas/types.yaml#/definitions/uint32
        enum: [0, 1]
        description: |
          Specifies the ALP's sensing mode as follows:
          0: Self capacitive
          1: Mutual capacitive

      azoteq,debounce-enter:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the ALP's debounce entrance factor.

      azoteq,debounce-exit:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the ALP's debounce exit factor.

      azoteq,thresh:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 65535
        description: Specifies the ALP's proximity or touch threshold.

      azoteq,conv-period:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the ALP's conversion period.

      azoteq,conv-frac:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the ALP's conversion frequency fraction.

      linux,code: true

    additionalProperties: false

  button:
    type: object
    description: Represents the inductive or capacitive button.

    properties:
      azoteq,ati-frac-div-fine:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 31
        description: Specifies the button's ATI fine fractional divider.

      azoteq,ati-frac-mult-coarse:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 15
        description: Specifies the button's ATI coarse fractional multiplier.

      azoteq,ati-frac-div-coarse:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 31
        description: Specifies the button's ATI coarse fractional divider.

      azoteq,ati-comp-div:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 31
        description: Specifies the button's ATI compensation divider.

      azoteq,ati-target:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 65535
        description: Specifies the button's ATI target.

      azoteq,ati-base:
        $ref: /schemas/types.yaml#/definitions/uint32
        multipleOf: 8
        minimum: 0
        maximum: 255
        description: Specifies the button's ATI base.

      azoteq,ati-mode:
        $ref: /schemas/types.yaml#/definitions/uint32
        enum: [0, 1]
        description: |
          Specifies the button's ATI mode as follows:
          0: Partial
          1: Full

      azoteq,sense-mode:
        $ref: /schemas/types.yaml#/definitions/uint32
        enum: [0, 1, 2]
        description: |
          Specifies the button's sensing mode as follows:
          0: Self capacitive
          1: Mutual capacitive
          2: Inductive

      azoteq,touch-enter:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the button's touch entrance factor.

      azoteq,touch-exit:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the button's touch exit factor.

      azoteq,debounce-enter:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the button's debounce entrance factor.

      azoteq,debounce-exit:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the button's debounce exit factor.

      azoteq,thresh:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 65535
        description: Specifies the button's proximity threshold.

      azoteq,conv-period:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the button's conversion period.

      azoteq,conv-frac:
        $ref: /schemas/types.yaml#/definitions/uint32
        minimum: 0
        maximum: 255
        description: Specifies the button's conversion frequency fraction.

    patternProperties:
      "^event-(prox|touch)$":
        type: object
        $ref: ../input.yaml#
        description:
          Represents a proximity or touch event reported by the button.

        properties:
          linux,code: true

        additionalProperties: false

    additionalProperties: false

  wakeup-source: true

  touchscreen-size-x: true
  touchscreen-size-y: true
  touchscreen-inverted-x: true
  touchscreen-inverted-y: true
  touchscreen-swapped-x-y: true

dependencies:
  touchscreen-size-x: ["azoteq,num-contacts"]
  touchscreen-size-y: ["azoteq,num-contacts"]
  touchscreen-inverted-x: ["azoteq,num-contacts"]
  touchscreen-inverted-y: ["azoteq,num-contacts"]
  touchscreen-swapped-x-y: ["azoteq,num-contacts"]

required:
  - compatible
  - reg
  - irq-gpios

additionalProperties: false

allOf:
  - $ref: touchscreen.yaml#

  - if:
      properties:
        compatible:
          contains:
            const: azoteq,iqs7210a

    then:
      properties:
        alp:
          properties:
            azoteq,rx-enable:
              maxItems: 4
              items:
                minimum: 4

    else:
      properties:
        azoteq,timeout-press-ms: false

        alp:
          properties:
            azoteq,ati-mode: false

        button: false

  - if:
      properties:
        compatible:
          contains:
            const: azoteq,iqs7211e

    then:
      properties:
        reset-gpios: false

        trackpad:
          properties:
            azoteq,tx-enable:
              maxItems: 13
              items:
                maximum: 12

        alp:
          properties:
            azoteq,tx-enable:
              maxItems: 13
              items:
                maximum: 12

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>
    #include <dt-bindings/input/input.h>

    i2c {
            #address-cells = <1>;
            #size-cells = <0>;

            touch@56 {
                    compatible = "azoteq,iqs7210a";
                    reg = <0x56>;
                    irq-gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
                    reset-gpios = <&gpio 17 (GPIO_ACTIVE_LOW |
                                             GPIO_PUSH_PULL)>;
                    azoteq,num-contacts = <2>;

                    trackpad {
                            azoteq,rx-enable = <6>, <5>, <4>, <3>, <2>;
                            azoteq,tx-enable = <1>, <7>, <8>, <9>, <10>;
                    };

                    button {
                            azoteq,sense-mode = <2>;
                            azoteq,touch-enter = <40>;
                            azoteq,touch-exit = <36>;

                            event-touch {
                                    linux,code = <KEY_HOME>;
                            };
                    };

                    alp {
                            azoteq,sense-mode = <1>;
                            linux,code = <KEY_POWER>;
                    };
            };
    };

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

    i2c {
            #address-cells = <1>;
            #size-cells = <0>;

            touch@56 {
                    compatible = "azoteq,iqs7211e";
                    reg = <0x56>;
                    irq-gpios = <&gpio 4 (GPIO_ACTIVE_LOW |
                                          GPIO_OPEN_DRAIN)>;

                    trackpad {
                            event-tap {
                                    linux,code = <KEY_PLAYPAUSE>;
                            };

                            event-tap-double {
                                    linux,code = <KEY_SHUFFLE>;
                            };

                            event-tap-triple {
                                    linux,code = <KEY_AGAIN>;
                            };

                            event-hold {
                                    linux,code = <KEY_STOP>;
                            };

                            event-palm {
                                    linux,code = <KEY_EXIT>;
                            };

                            event-swipe-x-pos {
                                    linux,code = <KEY_REWIND>;
                            };

                            event-swipe-x-pos-hold {
                                    linux,code = <KEY_PREVIOUS>;
                            };

                            event-swipe-x-neg {
                                    linux,code = <KEY_FASTFORWARD>;
                            };

                            event-swipe-x-neg-hold {
                                    linux,code = <KEY_NEXT>;
                            };

                            event-swipe-y-pos {
                                    linux,code = <KEY_VOLUMEUP>;
                            };

                            event-swipe-y-pos-hold {
                                    linux,code = <KEY_MUTE>;
                            };

                            event-swipe-y-neg {
                                    linux,code = <KEY_VOLUMEDOWN>;
                            };

                            event-swipe-y-neg-hold {
                                    linux,code = <KEY_MUTE>;
                            };
                    };
            };
    };

...