xref: /linux/include/linux/platform_data/keypad-pxa27x.h (revision 498495dba268b20e8eadd7fe93c140c68b6cc9d2)
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 */
74