include/linux/gpio_keys.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _GPIO_KEYS_H
   3 #define _GPIO_KEYS_H
   4
   5 #include <linux/types.h>
   6
   7 struct device;
   8
   9 /**
  10  * struct gpio_keys_button - configuration parameters
  11  * @code:               input event code (KEY_*, SW_*)
  12  * @gpio:               %-1 if this key does not support gpio
  13  * @active_low:         %true indicates that button is considered
  14  *                      depressed when gpio is low
  15  * @desc:               label that will be attached to button's gpio
  16  * @type:               input event type (%EV_KEY, %EV_SW, %EV_ABS)
  17  * @wakeup:             configure the button as a wake-up source
  18  * @wakeup_event_action:        event action to trigger wakeup
  19  * @debounce_interval:  debounce ticks interval in msecs
  20  * @can_disable:        %true indicates that userspace is allowed to
  21  *                      disable button via sysfs
  22  * @value:              axis value for %EV_ABS
  23  * @irq:                Irq number in case of interrupt keys
  24  * @wakeirq:            Optional dedicated wake-up interrupt
  25  */
  26 struct gpio_keys_button {
  27         unsigned int code;
  28         int gpio;
  29         int active_low;
  30         const char *desc;
  31         unsigned int type;
  32         int wakeup;
  33         int wakeup_event_action;
  34         int debounce_interval;
  35         bool can_disable;
  36         int value;
  37         unsigned int irq;
  38         unsigned int wakeirq;
  39 };
  40
  41 /**
  42  * struct gpio_keys_platform_data - platform data for gpio_keys driver
  43  * @buttons:            pointer to array of &gpio_keys_button structures
  44  *                      describing buttons attached to the device
  45  * @nbuttons:           number of elements in @buttons array
  46  * @poll_interval:      polling interval in msecs - for polling driver only
  47  * @rep:                enable input subsystem auto repeat
  48  * @enable:             platform hook for enabling the device
  49  * @disable:            platform hook for disabling the device
  50  * @name:               input device name
  51  */
  52 struct gpio_keys_platform_data {
  53         const struct gpio_keys_button *buttons;
  54         int nbuttons;
  55         unsigned int poll_interval;
  56         unsigned int rep:1;
  57         int (*enable)(struct device *dev);
  58         void (*disable)(struct device *dev);
  59         const char *name;
  60 };
  61
  62 #endif