1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * GPIO tools - utility helpers library for the GPIO tools
5 * Copyright (C) 2015 Linus Walleij
7 * Portions copied from iio_utils and lssio:
8 * Copyright (c) 2010 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
9 * Copyright (c) 2008 Jonathan Cameron
12 #ifndef _GPIO_UTILS_H_
13 #define _GPIO_UTILS_H_
17 #include <linux/types.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_line(const char *device_name,
29 unsigned int num_lines,
30 struct gpio_v2_line_config *config,
31 const char *consumer);
32 int gpiotools_set_values(const int fd, struct gpio_v2_line_values *values);
33 int gpiotools_get_values(const int fd, struct gpio_v2_line_values *values);
34 int gpiotools_release_line(const int fd);
36 int gpiotools_get(const char *device_name, unsigned int line);
37 int gpiotools_gets(const char *device_name, unsigned int *lines,
38 unsigned int num_lines, unsigned int *values);
39 int gpiotools_set(const char *device_name, unsigned int line,
41 int gpiotools_sets(const char *device_name, unsigned int *lines,
42 unsigned int num_lines, unsigned int *values);
44 /* helper functions for gpio_v2_line_values bits */
45 static inline void gpiotools_set_bit(__u64 *b, int n)
50 static inline void gpiotools_change_bit(__u64 *b, int n)
55 static inline void gpiotools_clear_bit(__u64 *b, int n)
60 static inline int gpiotools_test_bit(__u64 b, int n)
62 return !!(b & _BITULL(n));
65 static inline void gpiotools_assign_bit(__u64 *b, int n, bool value)
68 gpiotools_set_bit(b, n);
70 gpiotools_clear_bit(b, n);
73 #endif /* _GPIO_UTILS_H_ */