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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
6d591c46 LW |
2 | /* |
3 | * GPIO tools - utility helpers library for the GPIO tools | |
4 | * | |
5 | * Copyright (C) 2015 Linus Walleij | |
6 | * | |
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 | |
10 | * * | |
6d591c46 LW |
11 | */ |
12 | #ifndef _GPIO_UTILS_H_ | |
13 | #define _GPIO_UTILS_H_ | |
14 | ||
7ff6d1d2 | 15 | #include <stdbool.h> |
6d591c46 | 16 | #include <string.h> |
7ff6d1d2 | 17 | #include <linux/types.h> |
6d591c46 | 18 | |
521a2ad6 LW |
19 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) |
20 | ||
6d591c46 LW |
21 | static inline int check_prefix(const char *str, const char *prefix) |
22 | { | |
23 | return strlen(str) > strlen(prefix) && | |
24 | strncmp(str, prefix, strlen(prefix)) == 0; | |
25 | } | |
26 | ||
e1acec0e | 27 | int gpiotools_request_linehandle(const char *device_name, unsigned int *lines, |
ed60aee0 | 28 | unsigned int num_lines, unsigned int flag, |
e1acec0e BJZ |
29 | struct gpiohandle_data *data, |
30 | const char *consumer_label); | |
e1acec0e BJZ |
31 | int gpiotools_release_linehandle(const int fd); |
32 | ||
7ff6d1d2 KG |
33 | int gpiotools_request_line(const char *device_name, |
34 | unsigned int *lines, | |
35 | unsigned int num_lines, | |
36 | struct gpio_v2_line_config *config, | |
37 | const char *consumer); | |
38 | int gpiotools_set_values(const int fd, struct gpio_v2_line_values *values); | |
39 | int gpiotools_get_values(const int fd, struct gpio_v2_line_values *values); | |
40 | int gpiotools_release_line(const int fd); | |
41 | ||
e1acec0e BJZ |
42 | int gpiotools_get(const char *device_name, unsigned int line); |
43 | int gpiotools_gets(const char *device_name, unsigned int *lines, | |
7ff6d1d2 | 44 | unsigned int num_lines, unsigned int *values); |
e1acec0e BJZ |
45 | int gpiotools_set(const char *device_name, unsigned int line, |
46 | unsigned int value); | |
47 | int gpiotools_sets(const char *device_name, unsigned int *lines, | |
7ff6d1d2 KG |
48 | unsigned int num_lines, unsigned int *values); |
49 | ||
50 | /* helper functions for gpio_v2_line_values bits */ | |
51 | static inline void gpiotools_set_bit(__u64 *b, int n) | |
52 | { | |
53 | *b |= _BITULL(n); | |
54 | } | |
55 | ||
56 | static inline void gpiotools_change_bit(__u64 *b, int n) | |
57 | { | |
58 | *b ^= _BITULL(n); | |
59 | } | |
60 | ||
61 | static inline void gpiotools_clear_bit(__u64 *b, int n) | |
62 | { | |
63 | *b &= ~_BITULL(n); | |
64 | } | |
65 | ||
66 | static inline int gpiotools_test_bit(__u64 b, int n) | |
67 | { | |
68 | return !!(b & _BITULL(n)); | |
69 | } | |
70 | ||
71 | static inline void gpiotools_assign_bit(__u64 *b, int n, bool value) | |
72 | { | |
73 | if (value) | |
74 | gpiotools_set_bit(b, n); | |
75 | else | |
76 | gpiotools_clear_bit(b, n); | |
77 | } | |
e1acec0e | 78 | |
6d591c46 | 79 | #endif /* _GPIO_UTILS_H_ */ |