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> 15 #include <stdbool.h>
16 #include <string.h> 16 #include <string.h>
17 #include <linux/types.h> 17 #include <linux/types.h>
18 18
19 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof( 19 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
20 20
21 static inline int check_prefix(const char *str 21 static inline int check_prefix(const char *str, const char *prefix)
22 { 22 {
23 return strlen(str) > strlen(prefix) && 23 return strlen(str) > strlen(prefix) &&
24 strncmp(str, prefix, strlen(pr 24 strncmp(str, prefix, strlen(prefix)) == 0;
25 } 25 }
26 26
27 int gpiotools_request_line(const char *device_ 27 int gpiotools_request_line(const char *device_name,
28 unsigned int *lines 28 unsigned int *lines,
29 unsigned int num_li 29 unsigned int num_lines,
30 struct gpio_v2_line 30 struct gpio_v2_line_config *config,
31 const char *consume 31 const char *consumer);
32 int gpiotools_set_values(const int fd, struct 32 int gpiotools_set_values(const int fd, struct gpio_v2_line_values *values);
33 int gpiotools_get_values(const int fd, struct 33 int gpiotools_get_values(const int fd, struct gpio_v2_line_values *values);
34 int gpiotools_release_line(const int fd); 34 int gpiotools_release_line(const int fd);
35 35
36 int gpiotools_get(const char *device_name, uns 36 int gpiotools_get(const char *device_name, unsigned int line);
37 int gpiotools_gets(const char *device_name, un 37 int gpiotools_gets(const char *device_name, unsigned int *lines,
38 unsigned int num_lines, uns 38 unsigned int num_lines, unsigned int *values);
39 int gpiotools_set(const char *device_name, uns 39 int gpiotools_set(const char *device_name, unsigned int line,
40 unsigned int value); 40 unsigned int value);
41 int gpiotools_sets(const char *device_name, un 41 int gpiotools_sets(const char *device_name, unsigned int *lines,
42 unsigned int num_lines, uns 42 unsigned int num_lines, unsigned int *values);
43 43
44 /* helper functions for gpio_v2_line_values bi 44 /* helper functions for gpio_v2_line_values bits */
45 static inline void gpiotools_set_bit(__u64 *b, 45 static inline void gpiotools_set_bit(__u64 *b, int n)
46 { 46 {
47 *b |= _BITULL(n); 47 *b |= _BITULL(n);
48 } 48 }
49 49
50 static inline void gpiotools_change_bit(__u64 50 static inline void gpiotools_change_bit(__u64 *b, int n)
51 { 51 {
52 *b ^= _BITULL(n); 52 *b ^= _BITULL(n);
53 } 53 }
54 54
55 static inline void gpiotools_clear_bit(__u64 * 55 static inline void gpiotools_clear_bit(__u64 *b, int n)
56 { 56 {
57 *b &= ~_BITULL(n); 57 *b &= ~_BITULL(n);
58 } 58 }
59 59
60 static inline int gpiotools_test_bit(__u64 b, 60 static inline int gpiotools_test_bit(__u64 b, int n)
61 { 61 {
62 return !!(b & _BITULL(n)); 62 return !!(b & _BITULL(n));
63 } 63 }
64 64
65 static inline void gpiotools_assign_bit(__u64 65 static inline void gpiotools_assign_bit(__u64 *b, int n, bool value)
66 { 66 {
67 if (value) 67 if (value)
68 gpiotools_set_bit(b, n); 68 gpiotools_set_bit(b, n);
69 else 69 else
70 gpiotools_clear_bit(b, n); 70 gpiotools_clear_bit(b, n);
71 } 71 }
72 72
73 #endif /* _GPIO_UTILS_H_ */ 73 #endif /* _GPIO_UTILS_H_ */
74 74
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