summaryrefslogtreecommitdiffstats
path: root/dts/Bindings/input/microchip,cap11xx.yaml
blob: d5d6bced3148fff30f765c8f6847d8b9b980dde6 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: "http://devicetree.org/schemas/input/microchip,cap11xx.yaml#"
$schema: "http://devicetree.org/meta-schemas/core.yaml#"

title: Device tree bindings for Microchip CAP11xx based capacitive touch sensors

description: |
  The Microchip CAP1xxx Family of RightTouchTM multiple-channel capacitive
  touch controllers and LED drivers. The device communication via I2C only.

maintainers:
  - Rob Herring <robh@kernel.org>

properties:
  compatible:
    enum:
      - microchip,cap1106
      - microchip,cap1126
      - microchip,cap1188
      - microchip,cap1206

  reg:
    maxItems: 1

  '#address-cells':
    const: 1

  '#size-cells':
    const: 0

  interrupts:
    maxItems: 1
    description: |
      Property describing the interrupt line the
      device's ALERT#/CM_IRQ# pin is connected to.
      The device only has one interrupt source.

  autorepeat:
    description: |
      Enables the Linux input system's autorepeat feature on the input device.

  linux,keycodes:
    minItems: 6
    maxItems: 6
    description: |
      Specifies an array of numeric keycode values to
      be used for the channels. If this property is
      omitted, KEY_A, KEY_B, etc are used as defaults.
      The array must have exactly six entries.

  microchip,sensor-gain:
    $ref: /schemas/types.yaml#/definitions/uint32
    default: 1
    enum: [1, 2, 4, 8]
    description: |
      Defines the gain of the sensor circuitry. This
      effectively controls the sensitivity, as a
      smaller delta capacitance is required to
      generate the same delta count values.

  microchip,irq-active-high:
    type: boolean
    description: |
      By default the interrupt pin is active low
      open drain. This property allows using the active
      high push-pull output.

patternProperties:
  "^led@[0-7]$":
    type: object
    description: CAP11xx LEDs
    $ref: /schemas/leds/common.yaml#

    properties:
      reg:
        enum: [0, 1, 2, 3, 4, 5, 6, 7]

      label: true

      linux,default-trigger: true

      default-state: true

    required:
      - reg

    additionalProperties: false

allOf:
  - $ref: input.yaml
  - if:
      properties:
        compatible:
          contains:
            enum:
              - microchip,cap1106
    then:
      patternProperties:
        "^led@[0-7]$": false

required:
  - compatible
  - interrupts

additionalProperties: false

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

      cap1188@28 {
        compatible = "microchip,cap1188";
        interrupt-parent = <&gpio1>;
        interrupts = <0 0>;
        reg = <0x28>;
        autorepeat;
        microchip,sensor-gain = <2>;

        linux,keycodes = <103>,	/* KEY_UP */
                         <106>,	/* KEY_RIGHT */
                         <108>,	/* KEY_DOWN */
                         <105>,	/* KEY_LEFT */
                         <109>,	/* KEY_PAGEDOWN */
                         <104>;	/* KEY_PAGEUP */

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

        led@0 {
                label = "cap11xx:green:usr0";
                reg = <0>;
        };

        led@1 {
                label = "cap11xx:green:usr1";
                reg = <1>;
        };

        led@2 {
                label = "cap11xx:green:alive";
                reg = <2>;
                linux,default-trigger = "heartbeat";
        };
      };
    };