linux/include/linux/gpio_keys.h
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   1#ifndef _GPIO_KEYS_H
   2#define _GPIO_KEYS_H
   3
   4struct device;
   5struct gpio_desc;
   6
   7/**
   8 * struct gpio_keys_button - configuration parameters
   9 * @code:               input event code (KEY_*, SW_*)
  10 * @gpio:               %-1 if this key does not support gpio
  11 * @active_low:         %true indicates that button is considered
  12 *                      depressed when gpio is low
  13 * @desc:               label that will be attached to button's gpio
  14 * @type:               input event type (%EV_KEY, %EV_SW, %EV_ABS)
  15 * @wakeup:             configure the button as a wake-up source
  16 * @debounce_interval:  debounce ticks interval in msecs
  17 * @can_disable:        %true indicates that userspace is allowed to
  18 *                      disable button via sysfs
  19 * @value:              axis value for %EV_ABS
  20 * @irq:                Irq number in case of interrupt keys
  21 * @gpiod:              GPIO descriptor
  22 */
  23struct gpio_keys_button {
  24        unsigned int code;
  25        int gpio;
  26        int active_low;
  27        const char *desc;
  28        unsigned int type;
  29        int wakeup;
  30        int debounce_interval;
  31        bool can_disable;
  32        int value;
  33        unsigned int irq;
  34        struct gpio_desc *gpiod;
  35};
  36
  37/**
  38 * struct gpio_keys_platform_data - platform data for gpio_keys driver
  39 * @buttons:            pointer to array of &gpio_keys_button structures
  40 *                      describing buttons attached to the device
  41 * @nbuttons:           number of elements in @buttons array
  42 * @poll_interval:      polling interval in msecs - for polling driver only
  43 * @rep:                enable input subsystem auto repeat
  44 * @enable:             platform hook for enabling the device
  45 * @disable:            platform hook for disabling the device
  46 * @name:               input device name
  47 */
  48struct gpio_keys_platform_data {
  49        struct gpio_keys_button *buttons;
  50        int nbuttons;
  51        unsigned int poll_interval;
  52        unsigned int rep:1;
  53        int (*enable)(struct device *dev);
  54        void (*disable)(struct device *dev);
  55        const char *name;
  56};
  57
  58#endif
  59