1 /* SPDX-License-Identifier: GPL-2.0-only */ 1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* 2 /*
3 * GPIO tools - utility helpers library for th 3 * GPIO tools - utility helpers library for the GPIO tools
4 * 4 *
5 * Copyright (C) 2015 Linus Walleij 5 * Copyright (C) 2015 Linus Walleij
6 * 6 *
7 * Portions copied from iio_utils and lssio: 7 * Portions copied from iio_utils and lssio:
8 * Copyright (c) 2010 Manuel Stahl <manuel.sta 8 * Copyright (c) 2010 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
9 * Copyright (c) 2008 Jonathan Cameron 9 * Copyright (c) 2008 Jonathan Cameron
10 * * 10 * *
11 */ 11 */
12 #ifndef _GPIO_UTILS_H_ 12 #ifndef _GPIO_UTILS_H_
13 #define _GPIO_UTILS_H_ 13 #define _GPIO_UTILS_H_
14 14
15 #include <stdbool.h> <<
16 #include <string.h> 15 #include <string.h>
17 #include <linux/types.h> <<
18 16
19 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof( 17 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
20 18
21 static inline int check_prefix(const char *str 19 static inline int check_prefix(const char *str, const char *prefix)
22 { 20 {
23 return strlen(str) > strlen(prefix) && 21 return strlen(str) > strlen(prefix) &&
24 strncmp(str, prefix, strlen(pr 22 strncmp(str, prefix, strlen(prefix)) == 0;
25 } 23 }
26 24
27 int gpiotools_request_line(const char *device_ !! 25 int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
28 unsigned int *lines !! 26 unsigned int nlines, unsigned int flag,
29 unsigned int num_li !! 27 struct gpiohandle_data *data,
30 struct gpio_v2_line !! 28 const char *consumer_label);
31 const char *consume !! 29 int gpiotools_set_values(const int fd, struct gpiohandle_data *data);
32 int gpiotools_set_values(const int fd, struct !! 30 int gpiotools_get_values(const int fd, struct gpiohandle_data *data);
33 int gpiotools_get_values(const int fd, struct !! 31 int gpiotools_release_linehandle(const int fd);
34 int gpiotools_release_line(const int fd); <<
35 32
36 int gpiotools_get(const char *device_name, uns 33 int gpiotools_get(const char *device_name, unsigned int line);
37 int gpiotools_gets(const char *device_name, un 34 int gpiotools_gets(const char *device_name, unsigned int *lines,
38 unsigned int num_lines, uns !! 35 unsigned int nlines, struct gpiohandle_data *data);
39 int gpiotools_set(const char *device_name, uns 36 int gpiotools_set(const char *device_name, unsigned int line,
40 unsigned int value); 37 unsigned int value);
41 int gpiotools_sets(const char *device_name, un 38 int gpiotools_sets(const char *device_name, unsigned int *lines,
42 unsigned int num_lines, uns !! 39 unsigned int nlines, struct gpiohandle_data *data);
43 <<
44 /* helper functions for gpio_v2_line_values bi <<
45 static inline void gpiotools_set_bit(__u64 *b, <<
46 { <<
47 *b |= _BITULL(n); <<
48 } <<
49 <<
50 static inline void gpiotools_change_bit(__u64 <<
51 { <<
52 *b ^= _BITULL(n); <<
53 } <<
54 <<
55 static inline void gpiotools_clear_bit(__u64 * <<
56 { <<
57 *b &= ~_BITULL(n); <<
58 } <<
59 <<
60 static inline int gpiotools_test_bit(__u64 b, <<
61 { <<
62 return !!(b & _BITULL(n)); <<
63 } <<
64 <<
65 static inline void gpiotools_assign_bit(__u64 <<
66 { <<
67 if (value) <<
68 gpiotools_set_bit(b, n); <<
69 else <<
70 gpiotools_clear_bit(b, n); <<
71 } <<
72 40
73 #endif /* _GPIO_UTILS_H_ */ 41 #endif /* _GPIO_UTILS_H_ */
74 42
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