d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
#ifndef _IIO_UTILS_H_
|
|
#define _IIO_UTILS_H_
|
|
|
|
/* IIO - useful set of util functionality
|
|
*
|
|
* Copyright (c) 2008 Jonathan Cameron
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
/* Made up value to limit allocation sizes */
|
|
#define IIO_MAX_NAME_LENGTH 64
|
|
|
|
#define FORMAT_SCAN_ELEMENTS_DIR "%s/scan_elements"
|
|
#define FORMAT_TYPE_FILE "%s_type"
|
|
|
|
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
|
|
|
|
extern const char *iio_dir;
|
|
|
|
/**
|
|
* struct iio_channel_info - information about a given channel
|
|
* @name: channel name
|
|
* @generic_name: general name for channel type
|
|
* @scale: scale factor to be applied for conversion to si units
|
|
* @offset: offset to be applied for conversion to si units
|
|
* @index: the channel index in the buffer output
|
|
* @bytes: number of bytes occupied in buffer output
|
|
* @bits_used: number of valid bits of data
|
|
* @shift: amount of bits to shift right data before applying bit mask
|
|
* @mask: a bit mask for the raw output
|
|
* @be: flag if data is big endian
|
|
* @is_signed: is the raw value stored signed
|
|
* @location: data offset for this channel inside the buffer (in bytes)
|
|
**/
|
|
struct iio_channel_info {
|
|
char *name;
|
|
char *generic_name;
|
|
float scale;
|
|
float offset;
|
|
unsigned index;
|
|
unsigned bytes;
|
|
unsigned bits_used;
|
|
unsigned shift;
|
|
uint64_t mask;
|
|
unsigned be;
|
|
unsigned is_signed;
|
|
unsigned location;
|
|
};
|
|
|
|
static inline int iioutils_check_suffix(const char *str, const char *suffix)
|
|
{
|
|
return strlen(str) >= strlen(suffix) &&
|
|
strncmp(str+strlen(str)-strlen(suffix),
|
|
suffix, strlen(suffix)) == 0;
|
|
}
|
|
|
|
int iioutils_break_up_name(const char *full_name, char **generic_name);
|
|
int iioutils_get_type(unsigned *is_signed, unsigned *bytes, unsigned *bits_used,
|
|
unsigned *shift, uint64_t *mask, unsigned *be,
|
|
const char *device_dir, const char *name,
|
|
const char *generic_name);
|
|
int iioutils_get_param_float(float *output, const char *param_name,
|
|
const char *device_dir, const char *name,
|
|
const char *generic_name);
|
|
void bsort_channel_array_by_index(struct iio_channel_info *ci_array, int cnt);
|
|
int build_channel_array(const char *device_dir,
|
|
struct iio_channel_info **ci_array, int *counter);
|
|
int find_type_by_name(const char *name, const char *type);
|
|
int write_sysfs_int(const char *filename, const char *basedir, int val);
|
|
int write_sysfs_int_and_verify(const char *filename, const char *basedir,
|
|
int val);
|
|
int write_sysfs_string_and_verify(const char *filename, const char *basedir,
|
|
const char *val);
|
|
int write_sysfs_string(const char *filename, const char *basedir,
|
|
const char *val);
|
|
int read_sysfs_posint(const char *filename, const char *basedir);
|
|
int read_sysfs_float(const char *filename, const char *basedir, float *val);
|
|
int read_sysfs_string(const char *filename, const char *basedir, char *str);
|
|
|
|
#endif /* _IIO_UTILS_H_ */
|