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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-08-26 06:24:13 +0400 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-08-28 09:05:39 +0400 |
| commit | 77a53fd21870c726b670c0d8179294ac1ea33468 (patch) | |
| tree | a936dfad89adadd165fb4e114d3f8e71736585f9 /include/linux/input | |
| parent | 8fbac18e8edd974b5234d96a9b8e2a26ab2ac556 (diff) | |
| download | linux-77a53fd21870c726b670c0d8179294ac1ea33468.tar.xz | |
Input: matrix-keypad - add function to build device keymap
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'include/linux/input')
| -rw-r--r-- | include/linux/input/matrix_keypad.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/linux/input/matrix_keypad.h b/include/linux/input/matrix_keypad.h index 15d5903af2dd..b3cd42d50e16 100644 --- a/include/linux/input/matrix_keypad.h +++ b/include/linux/input/matrix_keypad.h @@ -63,4 +63,36 @@ struct matrix_keypad_platform_data { bool wakeup; }; +/** + * 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 + * @keybit: pointer to bitmap of keys supported by input device + * + * 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. + */ +static inline void +matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data, + unsigned int row_shift, + unsigned short *keymap, unsigned long *keybit) +{ + 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; + __set_bit(code, keybit); + } + __clear_bit(KEY_RESERVED, keybit); +} + #endif /* _MATRIX_KEYPAD_H */ |