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1 /* The industrial I/O core function defs.
2  *
3  * Copyright (c) 2008 Jonathan Cameron
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 as published by
7  * the Free Software Foundation.
8  *
9  * These definitions are meant for use only within the IIO core, not individual
10  * drivers.
11  */
12 
13 #ifndef _IIO_CORE_H_
14 #define _IIO_CORE_H_
15 #include <linux/kernel.h>
16 #include <linux/device.h>
17 
18 struct iio_chan_spec;
19 struct iio_dev;
20 
21 extern struct device_type iio_device_type;
22 
23 int __iio_add_chan_devattr(const char *postfix,
24 			   struct iio_chan_spec const *chan,
25 			   ssize_t (*func)(struct device *dev,
26 					   struct device_attribute *attr,
27 					   char *buf),
28 			   ssize_t (*writefunc)(struct device *dev,
29 						struct device_attribute *attr,
30 						const char *buf,
31 						size_t len),
32 			   u64 mask,
33 			   bool generic,
34 			   struct device *dev,
35 			   struct list_head *attr_list);
36 
37 /* Event interface flags */
38 #define IIO_BUSY_BIT_POS 1
39 
40 #ifdef CONFIG_IIO_BUFFER
41 struct poll_table_struct;
42 
43 unsigned int iio_buffer_poll(struct file *filp,
44 			     struct poll_table_struct *wait);
45 ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
46 				      size_t n, loff_t *f_ps);
47 
48 
49 #define iio_buffer_poll_addr (&iio_buffer_poll)
50 #define iio_buffer_read_first_n_outer_addr (&iio_buffer_read_first_n_outer)
51 
52 #else
53 
54 #define iio_buffer_poll_addr NULL
55 #define iio_buffer_read_first_n_outer_addr NULL
56 
57 #endif
58 
59 int iio_device_register_eventset(struct iio_dev *indio_dev);
60 void iio_device_unregister_eventset(struct iio_dev *indio_dev);
61 int iio_event_getfd(struct iio_dev *indio_dev);
62 
63 #endif
64