include/linux/gpio_keys.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _GPIO_KEYS_H
   3 #define _GPIO_KEYS_H
   4
   5 struct device;
   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  */
  22 struct gpio_keys_button {
  23         unsigned int code;
  24         int gpio;
  25         int active_low;
  26         const char *desc;
  27         unsigned int type;
  28         int wakeup;
  29         int debounce_interval;
  30         bool can_disable;
  31         int value;
  32         unsigned int irq;
  33 };
  34
  35 /**
  36  * struct gpio_keys_platform_data - platform data for gpio_keys driver
  37  * @buttons:            pointer to array of &gpio_keys_button structures
  38  *                      describing buttons attached to the device
  39  * @nbuttons:           number of elements in @buttons array
  40  * @poll_interval:      polling interval in msecs - for polling driver only
  41  * @rep:                enable input subsystem auto repeat
  42  * @enable:             platform hook for enabling the device
  43  * @disable:            platform hook for disabling the device
  44  * @name:               input device name
  45  */
  46 struct gpio_keys_platform_data {
  47         const struct gpio_keys_button *buttons;
  48         int nbuttons;
  49         unsigned int poll_interval;
  50         unsigned int rep:1;
  51         int (*enable)(struct device *dev);
  52         void (*disable)(struct device *dev);
  53         const char *name;
  54 };
  55
  56 #endif