Commit d8a3c488 authored by Jeff LaBundy's avatar Jeff LaBundy Committed by Lee Jones
Browse files

dt-bindings: Add bindings for Azoteq IQS620A/621/622/624/625 



This patch adds device tree bindings for the Azoteq IQS620A, IQS621,
IQS622, IQS624 and IQS625 multi-function sensors.

A total of three bindings are presented (one MFD and two child nodes);
they are submitted as a single patch because the child node bindings
have no meaning in the absence of the MFD binding.

Signed-off-by: default avatarJeff LaBundy <jeff@labundy.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent bb6d3fb3

Documentation/devicetree/bindings/input/iqs62x-keys.yaml

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/input/iqs62x-keys.yaml#

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



title: Azoteq IQS620A/621/622/624/625 Keys and Switches



maintainers:

  - Jeff LaBundy <jeff@labundy.com>



description: |

  The Azoteq IQS620A, IQS621, IQS622, IQS624 and IQS625 multi-function sensors

  feature a variety of self-capacitive, mutual-inductive and Hall-effect sens-

  ing capabilities that can facilitate a variety of contactless key and switch

  applications.



  These functions are collectively represented by a "keys" child node from the

  parent MFD driver. See Documentation/devicetree/bindings/mfd/iqs62x.yaml for

  further details and examples. Sensor hardware configuration (self-capacitive

  vs. mutual-inductive, etc.) is selected based on the device's firmware.



properties:

  compatible:

    enum:

      - azoteq,iqs620a-keys

      - azoteq,iqs621-keys

      - azoteq,iqs622-keys

      - azoteq,iqs624-keys

      - azoteq,iqs625-keys



  linux,keycodes:

    allOf:

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

      - minItems: 1

        maxItems: 16

    description: |

      Specifies the numeric keycodes associated with each available touch or

      proximity event according to the following table. An 'x' indicates the

      event is supported for a given device. Specify 0 for unused events.



      -------------------------------------------------------------------------

      | #  | Event              | IQS620A | IQS621 | IQS622 | IQS624 | IQS625 |

      -------------------------------------------------------------------------

      | 0  | CH0 Touch          |    x    |    x   |    x   |    x   |    x   |

      |    | Antenna 1 Touch*   |    x    |        |        |        |        |

      -------------------------------------------------------------------------

      | 1  | CH0 Proximity      |    x    |    x   |    x   |    x   |    x   |

      |    | Antenna 1 Prox.*   |    x    |        |        |        |        |

      -------------------------------------------------------------------------

      | 2  | CH1 Touch          |    x    |    x   |    x   |    x   |    x   |

      |    | Ant. 1 Deep Touch* |    x    |        |        |        |        |

      -------------------------------------------------------------------------

      | 3  | CH1 Proximity      |    x    |    x   |    x   |    x   |    x   |

      -------------------------------------------------------------------------

      | 4  | CH2 Touch          |    x    |        |        |        |        |

      -------------------------------------------------------------------------

      | 5  | CH2 Proximity      |    x    |        |        |        |        |

      |    | Antenna 2 Prox.*   |    x    |        |        |        |        |

      -------------------------------------------------------------------------

      | 6  | Metal (+) Touch**  |    x    |    x   |        |        |        |

      |    | Ant. 2 Deep Touch* |    x    |        |        |        |        |

      -------------------------------------------------------------------------

      | 7  | Metal (+) Prox.**  |    x    |    x   |        |        |        |

      |    | Antenna 2 Touch*   |    x    |        |        |        |        |

      -------------------------------------------------------------------------

      | 8  | Metal (-) Touch**  |    x    |    x   |        |        |        |

      -------------------------------------------------------------------------

      | 9  | Metal (-) Prox.**  |    x    |    x   |        |        |        |

      -------------------------------------------------------------------------

      | 10 | SAR Active***      |    x    |        |    x   |        |        |

      -------------------------------------------------------------------------

      | 11 | SAR Quick Rel.***  |    x    |        |    x   |        |        |

      -------------------------------------------------------------------------

      | 12 | SAR Movement***    |    x    |        |    x   |        |        |

      -------------------------------------------------------------------------

      | 13 | SAR Filter Halt*** |    x    |        |    x   |        |        |

      -------------------------------------------------------------------------

      | 14 | Wheel Up           |         |        |        |    x   |        |

      -------------------------------------------------------------------------

      | 15 | Wheel Down         |         |        |        |    x   |        |

      -------------------------------------------------------------------------

      *   Two-channel SAR. Replaces CH0-2 plus metal touch and proximity events

          if enabled via firmware.

      **  "+" and "-" refer to the polarity of a channel's delta (LTA - counts),

          where "LTA" is defined as the channel's long-term average.

      *** One-channel SAR. Replaces CH0-2 touch and proximity events if enabled

          via firmware.



patternProperties:

  "^hall-switch-(north|south)$":

    type: object

    description:

      Represents north/south-field Hall-effect sensor touch or proximity

      events. Note that north/south-field orientation is reversed on the

      IQS620AXzCSR device due to its flip-chip package.



    properties:

      linux,code:

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

        description: Numeric switch code associated with the event.



      azoteq,use-prox:

        $ref: /schemas/types.yaml#/definitions/flag

        description:

          If present, specifies that Hall-effect sensor reporting should

          use the device's wide-range proximity threshold instead of its

          close-range touch threshold (default).



    required:

      - linux,code



    additionalProperties: false



if:

  properties:

    compatible:

      contains:

        enum:

          - azoteq,iqs624-keys

          - azoteq,iqs625-keys

then:

  patternProperties:

    "^hall-switch-(north|south)$": false



required:

  - compatible

  - linux,keycodes



additionalProperties: false



...

Documentation/devicetree/bindings/mfd/iqs62x.yaml

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/mfd/iqs62x.yaml#

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



title: Azoteq IQS620A/621/622/624/625 Multi-Function Sensors



maintainers:

  - Jeff LaBundy <jeff@labundy.com>



description: |

  The Azoteq IQS620A, IQS621, IQS622, IQS624 and IQS625 multi-function sensors

  integrate multiple sensing technologies in a single package.



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



properties:

  compatible:

    enum:

      - azoteq,iqs620a

      - azoteq,iqs621

      - azoteq,iqs622

      - azoteq,iqs624

      - azoteq,iqs625



  reg:

    maxItems: 1



  interrupts:

    maxItems: 1



  firmware-name:

    $ref: /schemas/types.yaml#/definitions/string

    description:

      Specifies the name of the calibration and configuration file selected by

      the driver. If this property is omitted, the name is chosen based on the

      device name with ".bin" as the extension (e.g. iqs620a.bin for IQS620A).



  keys:

    $ref: ../input/iqs62x-keys.yaml



  pwm:

    $ref: ../pwm/iqs620a-pwm.yaml



required:

  - compatible

  - reg

  - interrupts



additionalProperties: false



examples:

  - |

    /*

     * Dual capacitive buttons with proximity-activated function, unipolar lid

     * switch and panel-mounted LED.

     */

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

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



    i2c {

            #address-cells = <1>;

            #size-cells = <0>;



            iqs620a@44 {

                    compatible = "azoteq,iqs620a";

                    reg = <0x44>;

                    interrupt-parent = <&gpio>;

                    interrupts = <17 IRQ_TYPE_LEVEL_LOW>;



                    keys {

                            compatible = "azoteq,iqs620a-keys";



                            linux,keycodes = <KEY_SELECT>,

                                             <KEY_MENU>,

                                             <KEY_OK>,

                                             <KEY_MENU>;



                            hall-switch-south {

                                    linux,code = <SW_LID>;

                                    azoteq,use-prox;

                            };

                    };



                    iqs620a_pwm: pwm {

                            compatible = "azoteq,iqs620a-pwm";

                            #pwm-cells = <2>;

                    };

            };

    };



    pwmleds {

            compatible = "pwm-leds";



            panel {

                    pwms = <&iqs620a_pwm 0 1000000>;

                    max-brightness = <255>;

            };

    };



  - |

    /* Single inductive button with bipolar dock/tablet-mode switch. */

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

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



    i2c {

            #address-cells = <1>;

            #size-cells = <0>;



            iqs620a@44 {

                    compatible = "azoteq,iqs620a";

                    reg = <0x44>;

                    interrupt-parent = <&gpio>;

                    interrupts = <17 IRQ_TYPE_LEVEL_LOW>;



                    firmware-name = "iqs620a_coil.bin";



                    keys {

                            compatible = "azoteq,iqs620a-keys";



                            linux,keycodes = <0>,

                                             <0>,

                                             <0>,

                                             <0>,

                                             <0>,

                                             <0>,

                                             <KEY_MUTE>;



                            hall-switch-north {

                                    linux,code = <SW_DOCK>;

                            };



                            hall-switch-south {

                                    linux,code = <SW_TABLET_MODE>;

                            };

                    };

            };

    };



  - |

    /* Dual capacitive buttons with volume knob. */

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

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



    i2c {

            #address-cells = <1>;

            #size-cells = <0>;



            iqs624@44 {

                    compatible = "azoteq,iqs624";

                    reg = <0x44>;

                    interrupt-parent = <&gpio>;

                    interrupts = <17 IRQ_TYPE_LEVEL_LOW>;



                    keys {

                            compatible = "azoteq,iqs624-keys";



                            linux,keycodes = <BTN_0>,

                                             <0>,

                                             <BTN_1>,

                                             <0>,

                                             <0>,

                                             <0>,

                                             <0>,

                                             <0>,

                                             <0>,

                                             <0>,

                                             <0>,

                                             <0>,

                                             <0>,

                                             <0>,

                                             <KEY_VOLUMEUP>,

                                             <KEY_VOLUMEDOWN>;

                    };

            };

    };



...

Documentation/devicetree/bindings/pwm/iqs620a-pwm.yaml

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/pwm/iqs620a-pwm.yaml#

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



title: Azoteq IQS620A PWM Generator



maintainers:

  - Jeff LaBundy <jeff@labundy.com>



description: |

  The Azoteq IQS620A multi-function sensor generates a fixed-frequency PWM

  output represented by a "pwm" child node from the parent MFD driver. See

  Documentation/devicetree/bindings/mfd/iqs62x.yaml for further details as

  well as an example.



properties:

  compatible:

    enum:

      - azoteq,iqs620a-pwm



  "#pwm-cells":

    const: 2



required:

  - compatible

  - "#pwm-cells"



additionalProperties: false



...

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