include/linux/platform_data/keypad-omap.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  Copyright (C) 2006 Komal Shah <komal_shah802003@yahoo.com>
   4  */
   5 #ifndef __KEYPAD_OMAP_H
   6 #define __KEYPAD_OMAP_H
   7
   8 #ifndef CONFIG_ARCH_OMAP1
   9 #warning Please update the board to use matrix-keypad driver
  10 #define omap_readw(reg)         0
  11 #define omap_writew(val, reg)   do {} while (0)
  12 #endif
  13 #include <linux/input/matrix_keypad.h>
  14
  15 struct omap_kp_platform_data {
  16         int rows;
  17         int cols;
  18         const struct matrix_keymap_data *keymap_data;
  19         bool rep;
  20         unsigned long delay;
  21         bool dbounce;
  22 };
  23
  24 /* Group (0..3) -- when multiple keys are pressed, only the
  25  * keys pressed in the same group are considered as pressed. This is
  26  * in order to workaround certain crappy HW designs that produce ghost
  27  * keypresses. Two free bits, not used by neither row/col nor keynum,
  28  * must be available for use as group bits. The below GROUP_SHIFT
  29  * macro definition is based on some prior knowledge of the
  30  * matrix_keypad defined KEY() macro internals.
  31  */
  32 #define GROUP_SHIFT     14
  33 #define GROUP_0         (0 << GROUP_SHIFT)
  34 #define GROUP_1         (1 << GROUP_SHIFT)
  35 #define GROUP_2         (2 << GROUP_SHIFT)
  36 #define GROUP_3         (3 << GROUP_SHIFT)
  37 #define GROUP_MASK      GROUP_3
  38 #if KEY_MAX & GROUP_MASK
  39 #error Group bits in conflict with keynum bits
  40 #endif
  41
  42
  43 #endif
  44