a980e04609
Take the core support + the kfifo buffer implentation out of staging. Whilst we are far from done in improving this subsystem it is now at a stage where the userspae interfaces (provided by the core) can be considered stable. Drivers will follow over a longer time scale. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/* The industrial I/O core function defs.
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*
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* Copyright (c) 2008 Jonathan Cameron
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* These definitions are meant for use only within the IIO core, not individual
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* drivers.
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*/
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#ifndef _IIO_CORE_H_
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#define _IIO_CORE_H_
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#include <linux/kernel.h>
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#include <linux/device.h>
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struct iio_chan_spec;
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struct iio_dev;
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int __iio_add_chan_devattr(const char *postfix,
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struct iio_chan_spec const *chan,
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ssize_t (*func)(struct device *dev,
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struct device_attribute *attr,
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char *buf),
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ssize_t (*writefunc)(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t len),
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u64 mask,
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bool generic,
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struct device *dev,
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struct list_head *attr_list);
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/* Event interface flags */
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#define IIO_BUSY_BIT_POS 1
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#ifdef CONFIG_IIO_BUFFER
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struct poll_table_struct;
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unsigned int iio_buffer_poll(struct file *filp,
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struct poll_table_struct *wait);
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ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
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size_t n, loff_t *f_ps);
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#define iio_buffer_poll_addr (&iio_buffer_poll)
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#define iio_buffer_read_first_n_outer_addr (&iio_buffer_read_first_n_outer)
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#else
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#define iio_buffer_poll_addr NULL
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#define iio_buffer_read_first_n_outer_addr NULL
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#endif
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int iio_device_register_eventset(struct iio_dev *indio_dev);
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void iio_device_unregister_eventset(struct iio_dev *indio_dev);
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int iio_event_getfd(struct iio_dev *indio_dev);
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#endif
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