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
|
#ifndef _MATRIX_KEYPAD_H
#define _MATRIX_KEYPAD_H
#include <linux/types.h>
#include <linux/input.h>
#include <linux/of.h>
#define MATRIX_MAX_ROWS 32
#define MATRIX_MAX_COLS 32
#define KEY(row, col, val) ((((row) & (MATRIX_MAX_ROWS - 1)) << 24) |\
(((col) & (MATRIX_MAX_COLS - 1)) << 16) |\
((val) & 0xffff))
#define KEY_ROW(k) (((k) >> 24) & 0xff)
#define KEY_COL(k) (((k) >> 16) & 0xff)
#define KEY_VAL(k) ((k) & 0xffff)
#define MATRIX_SCAN_CODE(row, col, row_shift) (((row) << (row_shift)) + (col))
/**
* struct matrix_keymap_data - keymap for matrix keyboards
* @keymap: pointer to array of uint32 values encoded with KEY() macro
* representing keymap
* @keymap_size: number of entries (initialized) in this keymap
*
* This structure is supposed to be used by platform code to supply
* keymaps to drivers that implement matrix-like keypads/keyboards.
*/
struct matrix_keymap_data {
const uint32_t *keymap;
unsigned int keymap_size;
};
/**
* struct matrix_keypad_platform_data - platform-dependent keypad data
* @keymap_data: pointer to &matrix_keymap_data
* @row_gpios: pointer to array of gpio numbers representing rows
* @col_gpios: pointer to array of gpio numbers reporesenting colums
* @num_row_gpios: actual number of row gpios used by device
* @num_col_gpios: actual number of col gpios used by device
* @col_scan_delay_us: delay, measured in microseconds, that is
* needed before we can keypad after activating column gpio
* @debounce_ms: debounce interval in milliseconds
* @clustered_irq: may be specified if interrupts of all row/column GPIOs
* are bundled to one single irq
* @clustered_irq_flags: flags that are needed for the clustered irq
* @active_low: gpio polarity
* @wakeup: controls whether the device should be set up as wakeup
* source
* @no_autorepeat: disable key autorepeat
* @drive_inactive_cols: drive inactive columns during scan, rather than
* making them inputs.
*
* This structure represents platform-specific data that use used by
* matrix_keypad driver to perform proper initialization.
*/
struct matrix_keypad_platform_data {
const struct matrix_keymap_data *keymap_data;
const unsigned int *row_gpios;
const unsigned int *col_gpios;
unsigned int num_row_gpios;
unsigned int num_col_gpios;
unsigned int col_scan_delay_us;
/* key debounce interval in milli-second */
unsigned int debounce_ms;
unsigned int clustered_irq;
unsigned int clustered_irq_flags;
bool active_low;
bool wakeup;
bool no_autorepeat;
bool drive_inactive_cols;
};
int matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data,
const char *keymap_name,
unsigned int rows, unsigned int cols,
unsigned short *keymap,
struct input_dev *input_dev);
int matrix_keypad_parse_properties(struct device *dev,
unsigned int *rows, unsigned int *cols);
#define matrix_keypad_parse_of_params matrix_keypad_parse_properties
#endif /* _MATRIX_KEYPAD_H */
|
