arch/arm/plat-omap/include/plat/keypad.h

   1 /*
   2  *  arch/arm/plat-omap/include/mach/keypad.h
   3  *
   4  *  Copyright (C) 2006 Komal Shah <komal_shah802003@yahoo.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #ifndef ASMARM_ARCH_KEYPAD_H
  11 #define ASMARM_ARCH_KEYPAD_H
  12
  13 #ifndef CONFIG_ARCH_OMAP1
  14 #warning Please update the board to use matrix-keypad driver
  15 #define omap_readw(reg)         0
  16 #define omap_writew(val, reg)   do {} while (0)
  17 #endif
  18 #include <linux/input/matrix_keypad.h>
  19
  20 struct omap_kp_platform_data {
  21         int rows;
  22         int cols;
  23         const struct matrix_keymap_data *keymap_data;
  24         bool rep;
  25         unsigned long delay;
  26         bool dbounce;
  27         /* specific to OMAP242x*/
  28         unsigned int *row_gpios;
  29         unsigned int *col_gpios;
  30 };
  31
  32 /* Group (0..3) -- when multiple keys are pressed, only the
  33  * keys pressed in the same group are considered as pressed. This is
  34  * in order to workaround certain crappy HW designs that produce ghost
  35  * keypresses. Two free bits, not used by neither row/col nor keynum,
  36  * must be available for use as group bits. The below GROUP_SHIFT
  37  * macro definition is based on some prior knowledge of the
  38  * matrix_keypad defined KEY() macro internals.
  39  */
  40 #define GROUP_SHIFT     14
  41 #define GROUP_0         (0 << GROUP_SHIFT)
  42 #define GROUP_1         (1 << GROUP_SHIFT)
  43 #define GROUP_2         (2 << GROUP_SHIFT)
  44 #define GROUP_3         (3 << GROUP_SHIFT)
  45 #define GROUP_MASK      GROUP_3
  46 #if KEY_MAX & GROUP_MASK
  47 #error Group bits in conflict with keynum bits
  48 #endif
  49
  50
  51 #endif
  52