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1 | #ifndef _MATRIX_KEYPAD_H |
2 | #define _MATRIX_KEYPAD_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | #include <linux/input.h> | |
6 | ||
7 | #define MATRIX_MAX_ROWS 16 | |
8 | #define MATRIX_MAX_COLS 16 | |
9 | ||
10 | #define KEY(row, col, val) ((((row) & (MATRIX_MAX_ROWS - 1)) << 24) |\ | |
11 | (((col) & (MATRIX_MAX_COLS - 1)) << 16) |\ | |
12 | (val & 0xffff)) | |
13 | ||
14 | #define KEY_ROW(k) (((k) >> 24) & 0xff) | |
15 | #define KEY_COL(k) (((k) >> 16) & 0xff) | |
16 | #define KEY_VAL(k) ((k) & 0xffff) | |
17 | ||
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18 | #define MATRIX_SCAN_CODE(row, col, row_shift) (((row) << (row_shift)) + (col)) |
19 | ||
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20 | /** |
21 | * struct matrix_keymap_data - keymap for matrix keyboards | |
22 | * @keymap: pointer to array of uint32 values encoded with KEY() macro | |
23 | * representing keymap | |
24 | * @keymap_size: number of entries (initialized) in this keymap | |
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25 | * |
26 | * This structure is supposed to be used by platform code to supply | |
27 | * keymaps to drivers that implement matrix-like keypads/keyboards. | |
28 | */ | |
29 | struct matrix_keymap_data { | |
30 | const uint32_t *keymap; | |
31 | unsigned int keymap_size; | |
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32 | }; |
33 | ||
34 | /** | |
35 | * struct matrix_keypad_platform_data - platform-dependent keypad data | |
36 | * @keymap_data: pointer to &matrix_keymap_data | |
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37 | * @row_gpios: pointer to array of gpio numbers representing rows |
38 | * @col_gpios: pointer to array of gpio numbers reporesenting colums | |
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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 | |
44 | * | |
45 | * This structure represents platform-specific data that use used by | |
46 | * matrix_keypad driver to perform proper initialization. | |
47 | */ | |
48 | struct matrix_keypad_platform_data { | |
49 | const struct matrix_keymap_data *keymap_data; | |
50 | ||
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51 | const unsigned int *row_gpios; |
52 | const unsigned int *col_gpios; | |
53 | ||
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54 | unsigned int num_row_gpios; |
55 | unsigned int num_col_gpios; | |
56 | ||
57 | unsigned int col_scan_delay_us; | |
58 | ||
59 | /* key debounce interval in milli-second */ | |
60 | unsigned int debounce_ms; | |
61 | ||
62 | bool active_low; | |
63 | bool wakeup; | |
64 | }; | |
65 | ||
66 | #endif /* _MATRIX_KEYPAD_H */ |