Linux-2.6.33.2/drivers/staging/iio/trigger_consumer.h

/* The industrial I/O core, trigger consumer handling functions
 *
 * Copyright (c) 2008 Jonathan Cameron
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#ifdef CONFIG_IIO_TRIGGER
/**
 * iio_device_register_trigger_consumer() - set up an iio_dev to use triggers
 * @dev_info: iio_dev associated with the device that will consume the trigger
 **/
int iio_device_register_trigger_consumer(struct iio_dev *dev_info);

/**
 * iio_device_unregister_trigger_consumer() - reverse the registration process
 * @dev_info: iio_dev associated with the device that consumed the trigger
 **/
int iio_device_unregister_trigger_consumer(struct iio_dev *dev_info);

#else

/**
 * iio_device_register_trigger_consumer() - set up an iio_dev to use triggers
 * @dev_info: iio_dev associated with the device that will consume the trigger
 **/
int iio_device_register_trigger_consumer(struct iio_dev *dev_info)
{
	return 0;
};

/**
 * iio_device_unregister_trigger_consumer() - reverse the registration process
 * @dev_info: iio_dev associated with the device that consumed the trigger
 **/
int iio_device_unregister_trigger_consumer(struct iio_dev *dev_info)
{
	return 0;
};

#endif /* CONFIG_TRIGGER_CONSUMER */