gpio_keys.h

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#ifndef _GPIO_KEYS_H
#define _GPIO_KEYS_H

struct device;

struct gpio_keys_button {
    /* Configuration parameters */
    unsigned int code;  /* input event code (KEY_*, SW_*) */
    int gpio;       /* -1 if this key does not support gpio */
    int active_low;
    const char *desc;
    unsigned int type;  /* input event type (EV_KEY, EV_SW, EV_ABS) */
    int wakeup;     /* configure the button as a wake-up source */
    int debounce_interval;  /* debounce ticks interval in msecs */
    bool can_disable;
    int value;      /* axis value for EV_ABS */
    unsigned int irq;   /* Irq number in case of interrupt keys */
};

struct gpio_keys_platform_data {
    struct gpio_keys_button *buttons;
    int nbuttons;
    unsigned int poll_interval; /* polling interval in msecs -
                       for polling driver only */
    unsigned int rep:1;     /* enable input subsystem auto repeat */
    int (*enable)(struct device *dev);
    void (*disable)(struct device *dev);
    const char *name;       /* input device name */
};

#endif