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Input: matrix-keypad - add function to build device keymap

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Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov
2009-08-25 19:24:13 -07:00
parent 8fbac18e8e
commit 77a53fd218
3 changed files with 37 additions and 26 deletions
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32
include/linux/input/matrix_keypad.h
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@ -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 */