1 #ifndef _MATRIX_KEYPAD_H
2 #define _MATRIX_KEYPAD_H
4 #include <linux/types.h>
5 #include <linux/input.h>
7 #define MATRIX_MAX_ROWS 16
8 #define MATRIX_MAX_COLS 16
10 #define KEY(row, col, val) ((((row) & (MATRIX_MAX_ROWS - 1)) << 24) |\
11 (((col) & (MATRIX_MAX_COLS - 1)) << 16) |\
14 #define KEY_ROW(k) (((k) >> 24) & 0xff)
15 #define KEY_COL(k) (((k) >> 16) & 0xff)
16 #define KEY_VAL(k) ((k) & 0xffff)
18 #define MATRIX_SCAN_CODE(row, col, row_shift) (((row) << (row_shift)) + (col))
21 * struct matrix_keymap_data - keymap for matrix keyboards
22 * @keymap: pointer to array of uint32 values encoded with KEY() macro
24 * @keymap_size: number of entries (initialized) in this keymap
26 * This structure is supposed to be used by platform code to supply
27 * keymaps to drivers that implement matrix-like keypads/keyboards.
29 struct matrix_keymap_data
{
30 const uint32_t *keymap
;
31 unsigned int keymap_size
;
35 * struct matrix_keypad_platform_data - platform-dependent keypad data
36 * @keymap_data: pointer to &matrix_keymap_data
37 * @row_gpios: pointer to array of gpio numbers representing rows
38 * @col_gpios: pointer to array of gpio numbers reporesenting colums
39 * @num_row_gpios: actual number of row gpios used by device
40 * @num_col_gpios: actual number of col gpios used by device
41 * @col_scan_delay_us: delay, measured in microseconds, that is
42 * needed before we can keypad after activating column gpio
43 * @debounce_ms: debounce interval in milliseconds
45 * This structure represents platform-specific data that use used by
46 * matrix_keypad driver to perform proper initialization.
48 struct matrix_keypad_platform_data
{
49 const struct matrix_keymap_data
*keymap_data
;
51 const unsigned int *row_gpios
;
52 const unsigned int *col_gpios
;
54 unsigned int num_row_gpios
;
55 unsigned int num_col_gpios
;
57 unsigned int col_scan_delay_us
;
59 /* key debounce interval in milli-second */
60 unsigned int debounce_ms
;
66 #endif /* _MATRIX_KEYPAD_H */