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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/input/cypress,tm2-touchkey.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Samsung TM2 touch key controller
maintainers:
- Stephan Gerhold <stephan@gerhold.net>
description: |
Touch key controllers similar to the TM2 can be found in a wide range of
Samsung devices. They are implemented using many different MCUs, but use
a similar I2C protocol.
allOf:
- $ref: input.yaml#
properties:
compatible:
enum:
- cypress,tm2-touchkey
- cypress,midas-touchkey
- cypress,aries-touchkey
- coreriver,tc360-touchkey
reg:
maxItems: 1
interrupts:
maxItems: 1
vdd-supply:
description: Optional regulator for LED voltage, 3.3V.
vcc-supply:
description: Optional regulator for MCU, 1.8V-3.3V (depending on MCU).
vddio-supply:
description: |
Optional regulator that provides digital I/O voltage,
e.g. for pulling up the interrupt line or the I2C pins.
linux,keycodes:
minItems: 1
maxItems: 4
required:
- compatible
- reg
- interrupts
additionalProperties: false
examples:
- |
#include <dt-bindings/input/input.h>
#include <dt-bindings/interrupt-controller/irq.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
touchkey@20 {
compatible = "cypress,tm2-touchkey";
reg = <0x20>;
interrupt-parent = <&gpa3>;
interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
vcc-supply = <&ldo32_reg>;
vdd-supply = <&ldo33_reg>;
linux,keycodes = <KEY_MENU KEY_BACK>;
};
};
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