1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | #ifndef _IIO_UTILS_H_ |
3 | #define _IIO_UTILS_H_ |
4 | |
5 | /* IIO - useful set of util functionality |
6 | * |
7 | * Copyright (c) 2008 Jonathan Cameron |
8 | */ |
9 | |
10 | #include <stdint.h> |
11 | |
12 | /* Made up value to limit allocation sizes */ |
13 | #define IIO_MAX_NAME_LENGTH 64 |
14 | |
15 | #define FORMAT_SCAN_ELEMENTS_DIR "%s/buffer%d" |
16 | #define FORMAT_EVENTS_DIR "%s/events" |
17 | #define FORMAT_TYPE_FILE "%s_type" |
18 | |
19 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0])) |
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 | * @bits_used: number of valid bits of data |
32 | * @shift: amount of bits to shift right data before applying bit mask |
33 | * @mask: a bit mask for the raw output |
34 | * @be: flag if data is big endian |
35 | * @is_signed: is the raw value stored signed |
36 | * @location: data offset for this channel inside the buffer (in bytes) |
37 | **/ |
38 | struct iio_channel_info { |
39 | char *name; |
40 | char *generic_name; |
41 | float scale; |
42 | float offset; |
43 | unsigned index; |
44 | unsigned bytes; |
45 | unsigned bits_used; |
46 | unsigned shift; |
47 | uint64_t mask; |
48 | unsigned be; |
49 | unsigned is_signed; |
50 | unsigned location; |
51 | }; |
52 | |
53 | static inline int iioutils_check_suffix(const char *str, const char *suffix) |
54 | { |
55 | return strlen(str) >= strlen(suffix) && |
56 | strncmp(str+strlen(str)-strlen(suffix), |
57 | suffix, strlen(suffix)) == 0; |
58 | } |
59 | |
60 | int iioutils_break_up_name(const char *full_name, char **generic_name); |
61 | int iioutils_get_param_float(float *output, const char *param_name, |
62 | const char *device_dir, const char *name, |
63 | const char *generic_name); |
64 | void bsort_channel_array_by_index(struct iio_channel_info *ci_array, int cnt); |
65 | int build_channel_array(const char *device_dir, int buffer_idx, |
66 | struct iio_channel_info **ci_array, int *counter); |
67 | int find_type_by_name(const char *name, const char *type); |
68 | int write_sysfs_int(const char *filename, const char *basedir, int val); |
69 | int write_sysfs_int_and_verify(const char *filename, const char *basedir, |
70 | int val); |
71 | int write_sysfs_string_and_verify(const char *filename, const char *basedir, |
72 | const char *val); |
73 | int write_sysfs_string(const char *filename, const char *basedir, |
74 | const char *val); |
75 | int read_sysfs_posint(const char *filename, const char *basedir); |
76 | int read_sysfs_float(const char *filename, const char *basedir, float *val); |
77 | int read_sysfs_string(const char *filename, const char *basedir, char *str); |
78 | |
79 | #endif /* _IIO_UTILS_H_ */ |
80 | |