linux-stable/Documentation/devicetree/bindings/input/syna,rmi4.yaml

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/input/syna,rmi4.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Synaptics RMI4 compliant devices

maintainers:
  - Jason A. Donenfeld <Jason@zx2c4.com>
  - Matthias Schiffer <matthias.schiffer@ew.tq-group.com
  - Vincent Huang <vincent.huang@tw.synaptics.com>

description: |
  The Synaptics RMI4 (Register Mapped Interface 4) core is able to support RMI4
  devices using different transports (I2C, SPI) and different functions (e.g.
  Function 1, 2D sensors using Function 11 or 12).  

properties:
  compatible:
    enum:
      - syna,rmi4-i2c
      - syna,rmi4-spi

  reg:
    maxItems: 1

  '#address-cells':
    const: 1

  '#size-cells':
    const: 0

  interrupts:
    maxItems: 1

  reset-gpios:
    maxItems: 1
    description: Active low signal

  spi-cpha: true
  spi-cpol: true

  syna,reset-delay-ms:
    description:
      Delay to wait after resetting the device.

  syna,startup-delay-ms:
    description:
      Delay to wait after powering on the device.

  vdd-supply: true
  vio-supply: true

  rmi4-f01@1:
    type: object
    additionalProperties: false
    description:
      Function 1

    properties:
      reg:
        maxItems: 1

      syna,nosleep-mode:
        $ref: /schemas/types.yaml#/definitions/uint32
        enum: [0, 1, 2]
        description:
          If set the device will run at full power without sleeping.  nosleep
          has 3 modes, 0 will not change the default setting, 1 will disable
          nosleep (allow sleeping), and 2 will enable nosleep (disabling
          sleep).

      syna,wakeup-threshold:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Defines the amplitude of the disturbance to the background
          capacitance that will cause the device to wake from dozing.

      syna,doze-holdoff-ms:
        description:
          The delay to wait after the last finger lift and the first doze
          cycle.

      syna,doze-interval-ms:
        description:
          The time period that the device sleeps between finger activity.

    required:
      - reg

patternProperties:
  "^rmi4-f1[12]@1[12]$":
    type: object
    unevaluatedProperties: false
    $ref: /schemas/input/touchscreen/touchscreen.yaml#
    description:
      RMI4 Function 11 and Function 12 are for 2D touch position sensing.

    properties:
      reg:
        maxItems: 1

      syna,clip-x-low:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Minimum value for X.

      syna,clip-y-low:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Minimum value for Y.

      syna,clip-x-high:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Maximum value for X.

      syna,clip-y-high:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Maximum value for Y.

      syna,offset-x:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Add an offset to X.

      syna,offset-y:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Add an offset to Y.

      syna,delta-x-threshold:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Minimum distance on the X axis required to generate an interrupt in
          reduced reporting mode.

      syna,delta-y-threshold:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Minimum distance on the Y axis required to generate an interrupt in
          reduced reporting mode.

      syna,sensor-type:
        $ref: /schemas/types.yaml#/definitions/uint32
        enum: [1, 2]
        description: |
          Sensor type: 1 for touchscreen 2 for touchpad.          

      syna,disable-report-mask:
        $ref: /schemas/types.yaml#/definitions/uint32
        description:
          Mask for disabling posiiton reporting. Used to disable reporing
          absolute position data.

      syna,rezero-wait-ms:
        description:
          Time to wait after issuing a rezero command.

    required:
      - reg

  "^rmi4-f[0-9a-f]+@[0-9a-f]+$":
    type: object
    additionalProperties: true

    description:
      Other functions, not documented yet.

    properties:
      reg:
        maxItems: 1

    required:
      - reg

required:
  - compatible
  - reg

unevaluatedProperties: false

allOf:
  - $ref: /schemas/spi/spi-peripheral-props.yaml#

  - if:
      properties:
        compatible:
          contains:
            const: syna,rmi4-i2c
    then:
      properties:
        spi-rx-delay-us: false
        spi-tx-delay-us: false
    else:
      properties:
        syna,reset-delay-ms: false
        syna,startup-delay-ms: false

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

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

        touchscreen@20 {
            compatible = "syna,rmi4-i2c";
            reg = <0x20>;
            interrupt-parent = <&gpx1>;
            interrupts = <6 IRQ_TYPE_EDGE_FALLING>;

            syna,startup-delay-ms = <100>;
            vdd-supply = <&tsp_vdd>;
            vio-supply = <&ldo32_reg>;

            pinctrl-0 = <&touch_irq>;
            pinctrl-names = "default";
            #address-cells = <1>;
            #size-cells = <0>;

            rmi4-f01@1 {
                reg = <0x1>;
                syna,nosleep-mode = <1>;
            };

            rmi4-f12@12 {
                reg = <0x12>;
                syna,sensor-type = <1>;
            };

            rmi4-f1a@1a {
                reg = <0x1a>;
            };
        };
    };    

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

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

        touchscreen@0 {
            compatible = "syna,rmi4-spi";
            reg = <0x0>;
            interrupt-parent = <&gpx1>;
            interrupts = <6 IRQ_TYPE_EDGE_FALLING>;

            spi-max-frequency = <4000000>;
            spi-rx-delay-us = <30>;
            spi-cpha;
            spi-cpol;

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

            rmi4-f01@1 {
                reg = <0x1>;
                syna,nosleep-mode = <1>;
            };

            rmi4-f11@11 {
                reg = <0x11>;
                touchscreen-inverted-y;
                syna,sensor-type = <2>;
            };
        };
    };