root/include/linux/platform_data/keypad-omap.h

INCLUDED FROM

   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         /* specific to OMAP242x*/
  23         unsigned int *row_gpios;
  24         unsigned int *col_gpios;
  25 };
  26 
  27 /* Group (0..3) -- when multiple keys are pressed, only the
  28  * keys pressed in the same group are considered as pressed. This is
  29  * in order to workaround certain crappy HW designs that produce ghost
  30  * keypresses. Two free bits, not used by neither row/col nor keynum,
  31  * must be available for use as group bits. The below GROUP_SHIFT
  32  * macro definition is based on some prior knowledge of the
  33  * matrix_keypad defined KEY() macro internals.
  34  */
  35 #define GROUP_SHIFT     14
  36 #define GROUP_0         (0 << GROUP_SHIFT)
  37 #define GROUP_1         (1 << GROUP_SHIFT)
  38 #define GROUP_2         (2 << GROUP_SHIFT)
  39 #define GROUP_3         (3 << GROUP_SHIFT)
  40 #define GROUP_MASK      GROUP_3
  41 #if KEY_MAX & GROUP_MASK
  42 #error Group bits in conflict with keynum bits
  43 #endif
  44 
  45 
  46 #endif
  47