include/linux/platform_data/keypad-pxa27x.h

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