1 * Broadcom Keypad Controller device tree bindi
2
3 Broadcom Keypad controller is used to interfac
4 keypad device. The keypad controller supports
5 A key can be placed at each intersection of a
6 The keypad controller can sense a key-press an
7 event using a interrupt to the cpu.
8
9 This binding is based on the matrix-keymap bin
10 changes:
11
12 keypad,num-rows and keypad,num-columns are req
13
14 Required SoC Specific Properties:
15 - compatible: should be "brcm,bcm-keypad"
16
17 - reg: physical base address of the controller
18 region.
19
20 - interrupts: The interrupt number to the cpu.
21
22 Board Specific Properties:
23 - keypad,num-rows: Number of row lines connect
24 controller.
25
26 - keypad,num-columns: Number of column lines c
27 keypad controller.
28
29 - col-debounce-filter-period: The debounce per
30
31 KEYPAD_DEBOUNCE_1_ms = 0
32 KEYPAD_DEBOUNCE_2_ms = 1
33 KEYPAD_DEBOUNCE_4_ms = 2
34 KEYPAD_DEBOUNCE_8_ms = 3
35 KEYPAD_DEBOUNCE_16_ms = 4
36 KEYPAD_DEBOUNCE_32_ms = 5
37 KEYPAD_DEBOUNCE_64_ms = 6
38 KEYPAD_DEBOUNCE_128_ms = 7
39
40 - status-debounce-filter-period: The debounce
41
42 KEYPAD_DEBOUNCE_1_ms = 0
43 KEYPAD_DEBOUNCE_2_ms = 1
44 KEYPAD_DEBOUNCE_4_ms = 2
45 KEYPAD_DEBOUNCE_8_ms = 3
46 KEYPAD_DEBOUNCE_16_ms = 4
47 KEYPAD_DEBOUNCE_32_ms = 5
48 KEYPAD_DEBOUNCE_64_ms = 6
49 KEYPAD_DEBOUNCE_128_ms = 7
50
51 - row-output-enabled: An optional property ind
52 column is being used as output. If specified
53 as the output. Else defaults to column.
54
55 - pull-up-enabled: An optional property indica
56 If specified implies the keypad scan pull-up
57
58 - autorepeat: Boolean, Enable auto repeat feat
59 subsystem (optional).
60
61 - linux,keymap: The keymap for keys as describ
62 devicetree/bindings/input/matrix-keymap.txt.
63
64 Example:
65 #include "dt-bindings/input/input.h"
66
67 / {
68 keypad: keypad@180ac000 {
69 /* Required SoC specific prope
70 compatible = "brcm,bcm-keypad"
71
72 /* Required Board specific pro
73 keypad,num-rows = <5>;
74 keypad,num-columns = <5>;
75
76 linux,keymap = <MATRIX_KEY(0x0
77 MATRIX_KEY(0x00, 0x03, KEY_HOM
78 MATRIX_KEY(0x00, 0x04, KEY_M)
79 MATRIX_KEY(0x01, 0x00, KEY_A)
80 MATRIX_KEY(0x01, 0x01, KEY_1)
81 MATRIX_KEY(0x01, 0x02, KEY_2)
82 MATRIX_KEY(0x01, 0x03, KEY_3)
83 MATRIX_KEY(0x01, 0x04, KEY_S)
84 MATRIX_KEY(0x02, 0x00, KEY_P)
85 MATRIX_KEY(0x02, 0x01, KEY_4)
86 MATRIX_KEY(0x02, 0x02, KEY_5)
87 MATRIX_KEY(0x02, 0x03, KEY_6)
88 MATRIX_KEY(0x02, 0x04, KEY_VOL
89 MATRIX_KEY(0x03, 0x00, KEY_C)
90 MATRIX_KEY(0x03, 0x01, KEY_7)
91 MATRIX_KEY(0x03, 0x02, KEY_8)
92 MATRIX_KEY(0x03, 0x03, KEY_9)
93 MATRIX_KEY(0x03, 0x04, KEY_VOL
94 MATRIX_KEY(0x04, 0x00, KEY_H)
95 MATRIX_KEY(0x04, 0x01, KEY_KPA
96 MATRIX_KEY(0x04, 0x02, KEY_0)
97 MATRIX_KEY(0x04, 0x03, KEY_GRA
98 MATRIX_KEY(0x04, 0x04, KEY_MUT
99 >;
100
101 /* Optional board specific pro
102 col-debounce-filter-period = <
103 row-output-enabled;
104 pull-up-enabled;
105
106 };
107 };
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