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Thomas Gleixnerd2912cb2019-06-04 10:11:33 +02001/* SPDX-License-Identifier: GPL-2.0-only */
Linus Walleij6d591c42015-10-21 15:45:54 +02002/*
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 * *
Linus Walleij6d591c42015-10-21 15:45:54 +020011 */
12#ifndef _GPIO_UTILS_H_
13#define _GPIO_UTILS_H_
14
Kent Gibson7ff6d1d2020-09-28 08:28:04 +080015#include <stdbool.h>
Linus Walleij6d591c42015-10-21 15:45:54 +020016#include <string.h>
Kent Gibson7ff6d1d2020-09-28 08:28:04 +080017#include <linux/types.h>
Linus Walleij6d591c42015-10-21 15:45:54 +020018
Linus Walleij521a2ad2016-02-12 22:25:22 +010019#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
20
Linus Walleij6d591c42015-10-21 15:45:54 +020021static 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
Bamvor Jian Zhange1acec0e2016-10-14 10:48:25 +080027int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
Kent Gibsoned60aee2020-09-28 08:28:03 +080028 unsigned int num_lines, unsigned int flag,
Bamvor Jian Zhange1acec0e2016-10-14 10:48:25 +080029 struct gpiohandle_data *data,
30 const char *consumer_label);
Bamvor Jian Zhange1acec0e2016-10-14 10:48:25 +080031int gpiotools_release_linehandle(const int fd);
32
Kent Gibson7ff6d1d2020-09-28 08:28:04 +080033int 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);
38int gpiotools_set_values(const int fd, struct gpio_v2_line_values *values);
39int gpiotools_get_values(const int fd, struct gpio_v2_line_values *values);
40int gpiotools_release_line(const int fd);
41
Bamvor Jian Zhange1acec0e2016-10-14 10:48:25 +080042int gpiotools_get(const char *device_name, unsigned int line);
43int gpiotools_gets(const char *device_name, unsigned int *lines,
Kent Gibson7ff6d1d2020-09-28 08:28:04 +080044 unsigned int num_lines, unsigned int *values);
Bamvor Jian Zhange1acec0e2016-10-14 10:48:25 +080045int gpiotools_set(const char *device_name, unsigned int line,
46 unsigned int value);
47int gpiotools_sets(const char *device_name, unsigned int *lines,
Kent Gibson7ff6d1d2020-09-28 08:28:04 +080048 unsigned int num_lines, unsigned int *values);
49
50/* helper functions for gpio_v2_line_values bits */
51static inline void gpiotools_set_bit(__u64 *b, int n)
52{
53 *b |= _BITULL(n);
54}
55
56static inline void gpiotools_change_bit(__u64 *b, int n)
57{
58 *b ^= _BITULL(n);
59}
60
61static inline void gpiotools_clear_bit(__u64 *b, int n)
62{
63 *b &= ~_BITULL(n);
64}
65
66static inline int gpiotools_test_bit(__u64 b, int n)
67{
68 return !!(b & _BITULL(n));
69}
70
71static 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}
Bamvor Jian Zhange1acec0e2016-10-14 10:48:25 +080078
Linus Walleij6d591c42015-10-21 15:45:54 +020079#endif /* _GPIO_UTILS_H_ */