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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 functionality6 *7 * Copyright (c) 2008 Jonathan Cameron8 */9 10#include <stdint.h>11 12/* Made up value to limit allocation sizes */13#define IIO_MAX_NAME_LENGTH 6414 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 21extern const char *iio_dir;22 23/**24 * struct iio_channel_info - information about a given channel25 * @name: channel name26 * @generic_name: general name for channel type27 * @scale: scale factor to be applied for conversion to si units28 * @offset: offset to be applied for conversion to si units29 * @index: the channel index in the buffer output30 * @bytes: number of bytes occupied in buffer output31 * @bits_used: number of valid bits of data32 * @shift: amount of bits to shift right data before applying bit mask33 * @mask: a bit mask for the raw output34 * @be: flag if data is big endian35 * @is_signed: is the raw value stored signed36 * @location: data offset for this channel inside the buffer (in bytes)37 **/38struct 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 53static 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 60int iioutils_break_up_name(const char *full_name, char **generic_name);61int iioutils_get_param_float(float *output, const char *param_name,62 const char *device_dir, const char *name,63 const char *generic_name);64void bsort_channel_array_by_index(struct iio_channel_info *ci_array, int cnt);65int build_channel_array(const char *device_dir, int buffer_idx,66 struct iio_channel_info **ci_array, int *counter);67int find_type_by_name(const char *name, const char *type);68int write_sysfs_int(const char *filename, const char *basedir, int val);69int write_sysfs_int_and_verify(const char *filename, const char *basedir,70 int val);71int write_sysfs_string_and_verify(const char *filename, const char *basedir,72 const char *val);73int write_sysfs_string(const char *filename, const char *basedir,74 const char *val);75int read_sysfs_posint(const char *filename, const char *basedir);76int read_sysfs_float(const char *filename, const char *basedir, float *val);77int read_sysfs_string(const char *filename, const char *basedir, char *str);78 79#endif /* _IIO_UTILS_H_ */80