include/linux/platform_data/keypad-omap.h

   1 /*
   2  *  Copyright (C) 2006 Komal Shah <komal_shah802003@yahoo.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8 #ifndef __KEYPAD_OMAP_H
   9 #define __KEYPAD_OMAP_H
  10
  11 #ifndef CONFIG_ARCH_OMAP1
  12 #warning Please update the board to use matrix-keypad driver
  13 #define omap_readw(reg)         0
  14 #define omap_writew(val, reg)   do {} while (0)
  15 #endif
  16 #include <linux/input/matrix_keypad.h>
  17
  18 struct omap_kp_platform_data {
  19         int rows;
  20         int cols;
  21         const struct matrix_keymap_data *keymap_data;
  22         bool rep;
  23         unsigned long delay;
  24         bool dbounce;
  25         /* specific to OMAP242x*/
  26         unsigned int *row_gpios;
  27         unsigned int *col_gpios;
  28 };
  29
  30 /* Group (0..3) -- when multiple keys are pressed, only the
  31  * keys pressed in the same group are considered as pressed. This is
  32  * in order to workaround certain crappy HW designs that produce ghost
  33  * keypresses. Two free bits, not used by neither row/col nor keynum,
  34  * must be available for use as group bits. The below GROUP_SHIFT
  35  * macro definition is based on some prior knowledge of the
  36  * matrix_keypad defined KEY() macro internals.
  37  */
  38 #define GROUP_SHIFT     14
  39 #define GROUP_0         (0 << GROUP_SHIFT)
  40 #define GROUP_1         (1 << GROUP_SHIFT)
  41 #define GROUP_2         (2 << GROUP_SHIFT)
  42 #define GROUP_3         (3 << GROUP_SHIFT)
  43 #define GROUP_MASK      GROUP_3
  44 #if KEY_MAX & GROUP_MASK
  45 #error Group bits in conflict with keynum bits
  46 #endif
  47
  48
  49 #endif
  50