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
|
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/input/ti,nspire-keypad.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: TI-NSPIRE Keypad
maintainers:
- Andrew Davis <afd@ti.com>
allOf:
- $ref: input.yaml#
- $ref: matrix-keymap.yaml#
properties:
compatible:
enum:
- ti,nspire-keypad
reg:
maxItems: 1
interrupts:
maxItems: 1
clocks:
maxItems: 1
scan-interval:
$ref: /schemas/types.yaml#/definitions/uint32
description: How often to scan in us. Based on a APB speed of 33MHz, the
maximum and minimum delay time is ~2000us and ~500us respectively
row-delay:
$ref: /schemas/types.yaml#/definitions/uint32
description: How long to wait between scanning each row in us.
active-low:
description: Specify that the keypad is active low.
required:
- compatible
- reg
- interrupts
- clocks
- scan-interval
- row-delay
- linux,keymap
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/input/input.h>
keypad@900e0000 {
compatible = "ti,nspire-keypad";
reg = <0x900e0000 0x1000>;
interrupts = <16>;
clocks = <&apb_pclk>;
scan-interval = <1000>;
row-delay = <200>;
linux,keymap = <
MATRIX_KEY(0, 0, KEY_ENTER)
MATRIX_KEY(0, 1, KEY_ENTER)
MATRIX_KEY(0, 4, KEY_SPACE)
MATRIX_KEY(0, 5, KEY_Z)
MATRIX_KEY(0, 6, KEY_Y)
MATRIX_KEY(0, 7, KEY_0)
>;
};
|
