0001 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/input/fsl,mpr121-touchkey.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Freescale MPR121 capacitive touch sensor controller
0008
0009 maintainers:
0010 - Dmitry Torokhov <dmitry.torokhov@gmail.com>
0011
0012 description: |
0013 The MPR121 supports up to 12 completely independent electrodes/capacitance
0014 sensing inputs in which 8 are multifunctional for LED driving and GPIO.
0015 https://www.nxp.com/docs/en/data-sheet/MPR121.pdf
0016
0017 allOf:
0018 - $ref: input.yaml#
0019
0020 anyOf:
0021 - required: [ interrupts ]
0022 - required: [ poll-interval ]
0023
0024 properties:
0025 compatible:
0026 const: fsl,mpr121-touchkey
0027
0028 reg:
0029 maxItems: 1
0030
0031 interrupts:
0032 maxItems: 1
0033
0034 vdd-supply: true
0035
0036 linux,keycodes:
0037 minItems: 1
0038 maxItems: 12
0039
0040 wakeup-source:
0041 description: Use any event on keypad as wakeup event.
0042 type: boolean
0043
0044 required:
0045 - compatible
0046 - reg
0047 - vdd-supply
0048 - linux,keycodes
0049
0050 unevaluatedProperties: false
0051
0052 examples:
0053 - |
0054 // Example with interrupts
0055 #include "dt-bindings/input/input.h"
0056 i2c {
0057 #address-cells = <1>;
0058 #size-cells = <0>;
0059
0060 touchkey@5a {
0061 compatible = "fsl,mpr121-touchkey";
0062 reg = <0x5a>;
0063 interrupt-parent = <&gpio1>;
0064 interrupts = <28 2>;
0065 autorepeat;
0066 vdd-supply = <&ldo4_reg>;
0067 linux,keycodes = <KEY_0>, <KEY_1>, <KEY_2>, <KEY_3>,
0068 <KEY_4>, <KEY_5>, <KEY_6>, <KEY_7>,
0069 <KEY_8>, <KEY_9>, <KEY_A>, <KEY_B>;
0070 };
0071 };
0072
0073 - |
0074 // Example with polling
0075 #include "dt-bindings/input/input.h"
0076 i2c {
0077 #address-cells = <1>;
0078 #size-cells = <0>;
0079
0080 touchkey@5a {
0081 compatible = "fsl,mpr121-touchkey";
0082 reg = <0x5a>;
0083 poll-interval = <20>;
0084 autorepeat;
0085 vdd-supply = <&ldo4_reg>;
0086 linux,keycodes = <KEY_0>, <KEY_1>, <KEY_2>, <KEY_3>,
0087 <KEY_4>, <KEY_5>, <KEY_6>, <KEY_7>,
0088 <KEY_8>, <KEY_9>, <KEY_A>, <KEY_B>;
0089 };
0090 };
