Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / tools / iio / iio_utils.h
1 #ifndef _IIO_UTILS_H_
2 #define _IIO_UTILS_H_
3
4 /* IIO - useful set of util functionality
5  *
6  * Copyright (c) 2008 Jonathan Cameron
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of the GNU General Public License version 2 as published by
10  * the Free Software Foundation.
11  */
12
13 #include <stdint.h>
14
15 /* Made up value to limit allocation sizes */
16 #define IIO_MAX_NAME_LENGTH 30
17
18 #define FORMAT_SCAN_ELEMENTS_DIR "%s/scan_elements"
19 #define FORMAT_TYPE_FILE "%s_type"
20
21 extern const char *iio_dir;
22
23 /**
24  * struct iio_channel_info - information about a given channel
25  * @name: channel name
26  * @generic_name: general name for channel type
27  * @scale: scale factor to be applied for conversion to si units
28  * @offset: offset to be applied for conversion to si units
29  * @index: the channel index in the buffer output
30  * @bytes: number of bytes occupied in buffer output
31  * @mask: a bit mask for the raw output
32  * @is_signed: is the raw value stored signed
33  * @enabled: is this channel enabled
34  **/
35 struct iio_channel_info {
36         char *name;
37         char *generic_name;
38         float scale;
39         float offset;
40         unsigned index;
41         unsigned bytes;
42         unsigned bits_used;
43         unsigned shift;
44         uint64_t mask;
45         unsigned be;
46         unsigned is_signed;
47         unsigned location;
48 };
49
50 int iioutils_break_up_name(const char *full_name, char **generic_name);
51 int iioutils_get_type(unsigned *is_signed, unsigned *bytes,
52                                           unsigned *bits_used, unsigned *shift,
53                                           uint64_t *mask, unsigned *be,
54                                           const char *device_dir, const char *name,
55                                           const char *generic_name);
56 int iioutils_get_param_float(float *output, const char *param_name,
57                                                          const char *device_dir, const char *name,
58                                                          const char *generic_name);
59 void bsort_channel_array_by_index(struct iio_channel_info **ci_array, int cnt);
60 int build_channel_array(const char *device_dir,
61                                                 struct iio_channel_info **ci_array, int *counter);
62 int find_type_by_name(const char *name, const char *type);
63 int write_sysfs_int(char *filename, char *basedir, int val);
64 int write_sysfs_int_and_verify(char *filename, char *basedir, int val);
65 int write_sysfs_string_and_verify(char *filename, char *basedir, char *val);
66 int write_sysfs_string(char *filename, char *basedir, char *val);
67 int read_sysfs_posint(char *filename, char *basedir);
68 int read_sysfs_float(char *filename, char *basedir, float *val);
69 int read_sysfs_string(const char *filename, const char *basedir, char *str);
70
71 #endif /* _IIO_UTILS_H_ */