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     1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/input/cypress,tm2-touchkey.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Samsung TM2 touch key controller
    8 
    9 maintainers:
   10   - Stephan Gerhold <stephan@gerhold.net>
   11 
   12 description: |
   13   Touch key controllers similar to the TM2 can be found in a wide range of
   14   Samsung devices. They are implemented using many different MCUs, but use
   15   a similar I2C protocol.
   16 
   17 allOf:
   18   - $ref: input.yaml#
   19 
   20 properties:
   21   compatible:
   22     enum:
   23       - cypress,tm2-touchkey
   24       - cypress,midas-touchkey
   25       - cypress,aries-touchkey
   26       - coreriver,tc360-touchkey
   27 
   28   reg:
   29     maxItems: 1
   30 
   31   interrupts:
   32     maxItems: 1
   33 
   34   vdd-supply:
   35     description: Optional regulator for LED voltage, 3.3V.
   36 
   37   vcc-supply:
   38     description: Optional regulator for MCU, 1.8V-3.3V (depending on MCU).
   39 
   40   vddio-supply:
   41     description: |
   42       Optional regulator that provides digital I/O voltage,
   43       e.g. for pulling up the interrupt line or the I2C pins.
   44 
   45   linux,keycodes:
   46     minItems: 1
   47     maxItems: 4
   48 
   49 required:
   50   - compatible
   51   - reg
   52   - interrupts
   53 
   54 additionalProperties: false
   55 
   56 examples:
   57   - |
   58     #include <dt-bindings/input/input.h>
   59     #include <dt-bindings/interrupt-controller/irq.h>
   60     i2c {
   61         #address-cells = <1>;
   62         #size-cells = <0>;
   63 
   64         touchkey@20 {
   65             compatible = "cypress,tm2-touchkey";
   66             reg = <0x20>;
   67             interrupt-parent = <&gpa3>;
   68             interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
   69             vcc-supply = <&ldo32_reg>;
   70             vdd-supply = <&ldo33_reg>;
   71             linux,keycodes = <KEY_MENU KEY_BACK>;
   72         };
   73     };
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