1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* The industrial I/O core function defs.
3 *
4 * Copyright (c) 2008 Jonathan Cameron
5 *
6 * These definitions are meant for use only within the IIO core, not individual
7 * drivers.
8 */
9
10 #ifndef _IIO_CORE_H_
11 #define _IIO_CORE_H_
12 #include <linux/kernel.h>
13 #include <linux/device.h>
14
15 struct iio_chan_spec;
16 struct iio_dev;
17
18 extern struct device_type iio_device_type;
19
20 int __iio_add_chan_devattr(const char *postfix,
21 struct iio_chan_spec const *chan,
22 ssize_t (*func)(struct device *dev,
23 struct device_attribute *attr,
24 char *buf),
25 ssize_t (*writefunc)(struct device *dev,
26 struct device_attribute *attr,
27 const char *buf,
28 size_t len),
29 u64 mask,
30 enum iio_shared_by shared_by,
31 struct device *dev,
32 struct list_head *attr_list);
33 void iio_free_chan_devattr_list(struct list_head *attr_list);
34
35 ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals);
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 __poll_t iio_buffer_poll(struct file *filp,
44 struct poll_table_struct *wait);
45 ssize_t iio_buffer_read_outer(struct file *filp, char __user *buf,
46 size_t n, loff_t *f_ps);
47
48 int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev);
49 void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev);
50
51 #define iio_buffer_poll_addr (&iio_buffer_poll)
52 #define iio_buffer_read_outer_addr (&iio_buffer_read_outer)
53
54 void iio_disable_all_buffers(struct iio_dev *indio_dev);
55 void iio_buffer_wakeup_poll(struct iio_dev *indio_dev);
56
57 #else
58
59 #define iio_buffer_poll_addr NULL
60 #define iio_buffer_read_outer_addr NULL
61
iio_buffer_alloc_sysfs_and_mask(struct iio_dev * indio_dev)62 static inline int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
63 {
64 return 0;
65 }
66
iio_buffer_free_sysfs_and_mask(struct iio_dev * indio_dev)67 static inline void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) {}
68
iio_disable_all_buffers(struct iio_dev * indio_dev)69 static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {}
iio_buffer_wakeup_poll(struct iio_dev * indio_dev)70 static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {}
71
72 #endif
73
74 int iio_device_register_eventset(struct iio_dev *indio_dev);
75 void iio_device_unregister_eventset(struct iio_dev *indio_dev);
76 void iio_device_wakeup_eventset(struct iio_dev *indio_dev);
77 int iio_event_getfd(struct iio_dev *indio_dev);
78
79 struct iio_event_interface;
80 bool iio_event_enabled(const struct iio_event_interface *ev_int);
81
82 #endif
83
