include/linux/platform_data/keypad-pxa27x.h

   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 */