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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2009-08-25 22:24:13 -0400
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2009-08-28 01:05:39 -0400
commit77a53fd21870c726b670c0d8179294ac1ea33468 (patch)
treea936dfad89adadd165fb4e114d3f8e71736585f9 /include/linux/input
parent8fbac18e8edd974b5234d96a9b8e2a26ab2ac556 (diff)
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.h32
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 {
63 bool wakeup; 63 bool wakeup;
64}; 64};
65 65
66/**
67 * matrix_keypad_build_keymap - convert platform keymap into matrix keymap
68 * @keymap_data: keymap supplied by the platform code
69 * @row_shift: number of bits to shift row value by to advance to the next
70 * line in the keymap
71 * @keymap: expanded version of keymap that is suitable for use by
72 * matrix keyboad driver
73 * @keybit: pointer to bitmap of keys supported by input device
74 *
75 * This function converts platform keymap (encoded with KEY() macro) into
76 * an array of keycodes that is suitable for using in a standard matrix
77 * keyboard driver that uses row and col as indices.
78 */
79static inline void
80matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data,
81 unsigned int row_shift,
82 unsigned short *keymap, unsigned long *keybit)
83{
84 int i;
85
86 for (i = 0; i < keymap_data->keymap_size; i++) {
87 unsigned int key = keymap_data->keymap[i];
88 unsigned int row = KEY_ROW(key);
89 unsigned int col = KEY_COL(key);
90 unsigned short code = KEY_VAL(key);
91
92 keymap[MATRIX_SCAN_CODE(row, col, row_shift)] = code;
93 __set_bit(code, keybit);
94 }
95 __clear_bit(KEY_RESERVED, keybit);
96}
97
66#endif /* _MATRIX_KEYPAD_H */ 98#endif /* _MATRIX_KEYPAD_H */