1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/input/fsl,mpr121-touchkey.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Freescale MPR121 capacitive touch sensor controller
8
9 maintainers:
10 - Dmitry Torokhov <dmitry.torokhov@gmail.com>
11
12 description: |
13 The MPR121 supports up to 12 completely independent electrodes/capacitance
14 sensing inputs in which 8 are multifunctional for LED driving and GPIO.
15 https://www.nxp.com/docs/en/data-sheet/MPR121.pdf
16
17 allOf:
18 - $ref: input.yaml#
19
20 anyOf:
21 - required: [ interrupts ]
22 - required: [ poll-interval ]
23
24 properties:
25 compatible:
26 const: fsl,mpr121-touchkey
27
28 reg:
29 maxItems: 1
30
31 interrupts:
32 maxItems: 1
33
34 vdd-supply: true
35
36 linux,keycodes:
37 minItems: 1
38 maxItems: 12
39
40 wakeup-source:
41 description: Use any event on keypad as wakeup event.
42 type: boolean
43
44 required:
45 - compatible
46 - reg
47 - vdd-supply
48 - linux,keycodes
49
50 unevaluatedProperties: false
51
52 examples:
53 - |
54 // Example with interrupts
55 #include "dt-bindings/input/input.h"
56 i2c {
57 #address-cells = <1>;
58 #size-cells = <0>;
59
60 touchkey@5a {
61 compatible = "fsl,mpr121-touchkey";
62 reg = <0x5a>;
63 interrupt-parent = <&gpio1>;
64 interrupts = <28 2>;
65 autorepeat;
66 vdd-supply = <&ldo4_reg>;
67 linux,keycodes = <KEY_0>, <KEY_1>, <KEY_2>, <KEY_3>,
68 <KEY_4>, <KEY_5>, <KEY_6>, <KEY_7>,
69 <KEY_8>, <KEY_9>, <KEY_A>, <KEY_B>;
70 };
71 };
72
73 - |
74 // Example with polling
75 #include "dt-bindings/input/input.h"
76 i2c {
77 #address-cells = <1>;
78 #size-cells = <0>;
79
80 touchkey@5a {
81 compatible = "fsl,mpr121-touchkey";
82 reg = <0x5a>;
83 poll-interval = <20>;
84 autorepeat;
85 vdd-supply = <&ldo4_reg>;
86 linux,keycodes = <KEY_0>, <KEY_1>, <KEY_2>, <KEY_3>,
87 <KEY_4>, <KEY_5>, <KEY_6>, <KEY_7>,
88 <KEY_8>, <KEY_9>, <KEY_A>, <KEY_B>;
89 };
90 };
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