diff options
Diffstat (limited to 'drivers/input/matrix-keymap.c')
-rw-r--r-- | drivers/input/matrix-keymap.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/input/matrix-keymap.c b/drivers/input/matrix-keymap.c new file mode 100644 index 0000000000..d56eccc29e --- /dev/null +++ b/drivers/input/matrix-keymap.c @@ -0,0 +1,42 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include <common.h> +#include <input/matrix_keypad.h> + +/** + * matrix_keypad_build_keymap - convert platform keymap into matrix keymap + * @keymap_data: keymap supplied by the platform code + * @row_shift: number of bits to shift row value by to advance to the next + * line in the keymap + * @keymap: expanded version of keymap that is suitable for use by + * matrix keyboad driver + * This function converts platform keymap (encoded with KEY() macro) into + * an array of keycodes that is suitable for using in a standard matrix + * keyboard driver that uses row and col as indices. + */ +int matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data, + unsigned int row_shift, + unsigned short *keymap) +{ + int i; + + for (i = 0; i < keymap_data->keymap_size; i++) { + unsigned int key = keymap_data->keymap[i]; + unsigned int row = KEY_ROW(key); + unsigned int col = KEY_COL(key); + unsigned short code = KEY_VAL(key); + + keymap[MATRIX_SCAN_CODE(row, col, row_shift)] = code; + } + + return 0; +} |