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
15struct 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