root/include/linux/i2c/max732x.h

#ifndef __LINUX_I2C_MAX732X_H
#define __LINUX_I2C_MAX732X_H

/* platform data for the MAX732x 8/16-bit I/O expander driver */

struct max732x_platform_data {
        /* number of the first GPIO */
        unsigned        gpio_base;

        void            *context;       /* param to setup/teardown */

        int             (*setup)(struct i2c_client *client,
                                unsigned gpio, unsigned ngpio,
                                void *context);
        int             (*teardown)(struct i2c_client *client,
                                unsigned gpio, unsigned ngpio,
                                void *context);
};
#endif /* __LINUX_I2C_MAX732X_H */