diff options
Diffstat (limited to 'include/linux/input/matrix_keypad.h')
-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 { | |||
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 | */ | ||
79 | static inline void | ||
80 | matrix_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 */ |