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 /** 19 * struct matrix_keymap_data - keymap for matrix keyboards 20 * @keymap: pointer to array of uint32 values encoded with KEY() macro 21 * representing keymap 22 * @keymap_size: number of entries (initialized) in this keymap 23 * @max_keymap_size: maximum size of keymap supported by the device 24 * 25 * This structure is supposed to be used by platform code to supply 26 * keymaps to drivers that implement matrix-like keypads/keyboards. 27 */ 28 struct matrix_keymap_data { 29 const uint32_t *keymap; 30 unsigned int keymap_size; 31 unsigned int max_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: array of gpio numbers reporesenting rows 38 * @col_gpios: 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 unsigned int row_gpios[MATRIX_MAX_ROWS]; 52 unsigned int col_gpios[MATRIX_MAX_COLS]; 53 unsigned int num_row_gpios; 54 unsigned int num_col_gpios; 55 56 unsigned int col_scan_delay_us; 57 58 /* key debounce interval in milli-second */ 59 unsigned int debounce_ms; 60 61 bool active_low; 62 bool wakeup; 63 }; 64 65 #endif /* _MATRIX_KEYPAD_H */ 66