2 * GPIO tools - utility helpers library for the GPIO tools
4 * Copyright (C) 2015 Linus Walleij
6 * Portions copied from iio_utils and lssio:
7 * Copyright (c) 2010 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
8 * Copyright (c) 2008 Jonathan Cameron
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation.
14 #ifndef _GPIO_UTILS_H_
15 #define _GPIO_UTILS_H_
19 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
21 static inline int check_prefix(const char *str, const char *prefix)
23 return strlen(str) > strlen(prefix) &&
24 strncmp(str, prefix, strlen(prefix)) == 0;
27 int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
28 unsigned int nlines, unsigned int flag,
29 struct gpiohandle_data *data,
30 const char *consumer_label);
31 int gpiotools_set_values(const int fd, struct gpiohandle_data *data);
32 int gpiotools_get_values(const int fd, struct gpiohandle_data *data);
33 int gpiotools_release_linehandle(const int fd);
35 int gpiotools_get(const char *device_name, unsigned int line);
36 int gpiotools_gets(const char *device_name, unsigned int *lines,
37 unsigned int nlines, struct gpiohandle_data *data);
38 int gpiotools_set(const char *device_name, unsigned int line,
40 int gpiotools_sets(const char *device_name, unsigned int *lines,
41 unsigned int nlines, struct gpiohandle_data *data);
43 #endif /* _GPIO_UTILS_H_ */