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
|
# SPDX-License-Identifier: GPL-2.0-only
%YAML 1.2
---
$id: http://devicetree.org/schemas/input/gpio-keys.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: GPIO attached keys
maintainers:
- Rob Herring <robh@kernel.org>
properties:
compatible:
enum:
- gpio-keys
- gpio-keys-polled
autorepeat: true
label:
description: Name of entire device
poll-interval: true
patternProperties:
"^(button|event|key|switch|(button|event|key|switch)-[a-z0-9-]+|[a-z0-9-]+-(button|event|key|switch))$":
$ref: input.yaml#
properties:
gpios:
maxItems: 1
interrupts:
maxItems: 1
label:
description: Descriptive name of the key.
linux,code:
description: Key / Axis code to emit.
linux,input-type:
default: 1 # EV_KEY
linux,input-value:
description: |
If linux,input-type is EV_ABS or EV_REL then this
value is sent for events this button generates when pressed.
EV_ABS/EV_REL axis will generate an event with a value of 0
when all buttons with linux,input-type == type and
linux,code == axis are released. This value is interpreted
as a signed 32 bit value, e.g. to make a button generate a
value of -1 use:
linux,input-value = <0xffffffff>; /* -1 */
$ref: /schemas/types.yaml#/definitions/uint32
debounce-interval:
description:
Debouncing interval time in milliseconds. If not specified defaults to 5.
$ref: /schemas/types.yaml#/definitions/uint32
default: 5
wakeup-source:
description: Button can wake-up the system.
wakeup-event-action:
description: |
Specifies whether the key should wake the system when asserted, when
deasserted, or both. This property is only valid for keys that wake up the
system (e.g., when the "wakeup-source" property is also provided).
Supported values are defined in linux-event-codes.h:
EV_ACT_ANY - both asserted and deasserted
EV_ACT_ASSERTED - asserted
EV_ACT_DEASSERTED - deasserted
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1, 2]
linux,can-disable:
description:
Indicates that button is connected to dedicated (not shared) interrupt
which can be disabled to suppress events from the button.
type: boolean
required:
- linux,code
anyOf:
- required:
- interrupts
- required:
- interrupts-extended
- required:
- gpios
dependencies:
wakeup-event-action: [ wakeup-source ]
linux,input-value: [ gpios ]
unevaluatedProperties: false
allOf:
- $ref: input.yaml#
- if:
properties:
compatible:
const: gpio-keys-polled
then:
required:
- poll-interval
else:
properties:
poll-interval: false
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
gpio-keys {
compatible = "gpio-keys";
autorepeat;
key-up {
label = "GPIO Key UP";
linux,code = <103>;
gpios = <&gpio1 0 1>;
};
key-down {
label = "GPIO Key DOWN";
linux,code = <108>;
interrupts = <1 IRQ_TYPE_EDGE_FALLING>;
};
};
...
|
