include/linux/gpio_keys.h

   1 #ifndef _GPIO_KEYS_H
   2 #define _GPIO_KEYS_H
   3
   4 struct device;
   5
   6 /**
   7  * struct gpio_keys_button - configuration parameters
   8  * @code:               input event code (KEY_*, SW_*)
   9  * @gpio:               %-1 if this key does not support gpio
  10  * @active_low:         %true indicates that button is considered
  11  *                      depressed when gpio is low
  12  * @desc:               label that will be attached to button's gpio
  13  * @type:               input event type (%EV_KEY, %EV_SW, %EV_ABS)
  14  * @wakeup:             configure the button as a wake-up source
  15  * @debounce_interval:  debounce ticks interval in msecs
  16  * @can_disable:        %true indicates that userspace is allowed to
  17  *                      disable button via sysfs
  18  * @value:              axis value for %EV_ABS
  19  * @irq:                Irq number in case of interrupt keys
  20  */
  21 struct gpio_keys_button {
  22         unsigned int code;
  23         int gpio;
  24         int active_low;
  25         const char *desc;
  26         unsigned int type;
  27         int wakeup;
  28         int debounce_interval;
  29         bool can_disable;
  30         int value;
  31         unsigned int irq;
  32 };
  33
  34 /**
  35  * struct gpio_keys_platform_data - platform data for gpio_keys driver
  36  * @buttons:            pointer to array of &gpio_keys_button structures
  37  *                      describing buttons attached to the device
  38  * @nbuttons:           number of elements in @buttons array
  39  * @poll_interval:      polling interval in msecs - for polling driver only
  40  * @rep:                enable input subsystem auto repeat
  41  * @enable:             platform hook for enabling the device
  42  * @disable:            platform hook for disabling the device
  43  * @name:               input device name
  44  */
  45 struct gpio_keys_platform_data {
  46         const struct gpio_keys_button *buttons;
  47         int nbuttons;
  48         unsigned int poll_interval;
  49         unsigned int rep:1;
  50         int (*enable)(struct device *dev);
  51         void (*disable)(struct device *dev);
  52         const char *name;
  53 };
  54
  55 #endif