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 18 #define MATRIX_SCAN_CODE(row, col, row_shift) (((row) << (row_shift)) + (col)) 19 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 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; 32 }; 33 34 /** 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 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 51 const unsigned int *row_gpios; 52 const unsigned int *col_gpios; 53 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 */ 67