1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_ARCH_PXA27x_KEYPAD_H
3 #define __ASM_ARCH_PXA27x_KEYPAD_H
4
5 #include <linux/input.h>
6 #include <linux/input/matrix_keypad.h>
7
8 #define MAX_MATRIX_KEY_ROWS (8)
9 #define MAX_MATRIX_KEY_COLS (8)
10 #define MATRIX_ROW_SHIFT (3)
11 #define MAX_DIRECT_KEY_NUM (8)
12
13 /* pxa3xx keypad platform specific parameters
14 *
15 * NOTE:
16 * 1. direct_key_num indicates the number of keys in the direct keypad
17 * _plus_ the number of rotary-encoder sensor inputs, this can be
18 * left as 0 if only rotary encoders are enabled, the driver will
19 * automatically calculate this
20 *
21 * 2. direct_key_map is the key code map for the direct keys, if rotary
22 * encoder(s) are enabled, direct key 0/1(2/3) will be ignored
23 *
24 * 3. rotary can be either interpreted as a relative input event (e.g.
25 * REL_WHEEL/REL_HWHEEL) or specific keys (e.g. UP/DOWN/LEFT/RIGHT)
26 *
27 * 4. matrix key and direct key will use the same debounce_interval by
28 * default, which should be sufficient in most cases
29 *
30 * pxa168 keypad platform specific parameter
31 *
32 * NOTE:
33 * clear_wakeup_event callback is a workaround required to clear the
34 * keypad interrupt. The keypad wake must be cleared in addition to
35 * reading the MI/DI bits in the KPC register.
36 */
37 struct pxa27x_keypad_platform_data {
38
39 /* code map for the matrix keys */
40 const struct matrix_keymap_data *matrix_keymap_data;
41 unsigned int matrix_key_rows;
42 unsigned int matrix_key_cols;
43
44 /* direct keys */
45 int direct_key_num;
46 unsigned int direct_key_map[MAX_DIRECT_KEY_NUM];
47 /* the key output may be low active */
48 int direct_key_low_active;
49 /* give board a chance to choose the start direct key */
50 unsigned int direct_key_mask;
51
52 /* rotary encoders 0 */
53 int enable_rotary0;
54 int rotary0_rel_code;
55 int rotary0_up_key;
56 int rotary0_down_key;
57
58 /* rotary encoders 1 */
59 int enable_rotary1;
60 int rotary1_rel_code;
61 int rotary1_up_key;
62 int rotary1_down_key;
63
64 /* key debounce interval */
65 unsigned int debounce_interval;
66
67 /* clear wakeup event requirement for pxa168 */
68 void (*clear_wakeup_event)(void);
69 };
70
71 extern void pxa_set_keypad_info(struct pxa27x_keypad_platform_data *info);
72
73 #endif /* __ASM_ARCH_PXA27x_KEYPAD_H */