xref: /freebsd/sys/contrib/device-tree/Bindings/input/elan,ekth6915.yaml (revision b2d2a78ad80ec68d4a17f5aef97d21686cb1e29b)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/input/elan,ekth6915.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Elan eKTH6915 touchscreen controller

maintainers:
  - Douglas Anderson <dianders@chromium.org>

description:
  Supports the Elan eKTH6915 touchscreen controller.
  This touchscreen controller uses the i2c-hid protocol with a reset GPIO.

allOf:
  - $ref: /schemas/input/touchscreen/touchscreen.yaml#

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - elan,ekth5015m
          - const: elan,ekth6915
      - enum:
          - elan,ekth6915
          - elan,ekth6a12nay

  reg:
    const: 0x10

  interrupts:
    maxItems: 1

  panel: true

  reset-gpios:
    description: Reset GPIO; not all touchscreens using eKTH6915 hook this up.

  no-reset-on-power-off:
    type: boolean
    description:
      Reset line is wired so that it can (and should) be left deasserted when
      the power supply is off.

  vcc33-supply:
    description: The 3.3V supply to the touchscreen.

  vccio-supply:
    description:
      The IO supply to the touchscreen. Need not be specified if this is the
      same as the 3.3V supply.

required:
  - compatible
  - reg
  - interrupts
  - vcc33-supply

additionalProperties: false

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

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

      touchscreen@10 {
        compatible = "elan,ekth5015m", "elan,ekth6915";
        reg = <0x10>;

        interrupt-parent = <&tlmm>;
        interrupts = <9 IRQ_TYPE_LEVEL_LOW>;

        reset-gpios = <&tlmm 8 GPIO_ACTIVE_LOW>;
        vcc33-supply = <&pp3300_ts>;
      };
    };