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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * GPIO tools - utility helpers library for the GPIO tools4 *5 * Copyright (C) 2015 Linus Walleij6 *7 * Portions copied from iio_utils and lssio:8 * Copyright (c) 2010 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>9 * Copyright (c) 2008 Jonathan Cameron10 * *11 */12#ifndef _GPIO_UTILS_H_13#define _GPIO_UTILS_H_14 15#include <stdbool.h>16#include <string.h>17#include <linux/types.h>18 19#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))20 21static 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 27int gpiotools_request_line(const char *device_name,28 unsigned int *lines,29 unsigned int num_lines,30 struct gpio_v2_line_config *config,31 const char *consumer);32int gpiotools_set_values(const int fd, struct gpio_v2_line_values *values);33int gpiotools_get_values(const int fd, struct gpio_v2_line_values *values);34int gpiotools_release_line(const int fd);35 36int gpiotools_get(const char *device_name, unsigned int line);37int gpiotools_gets(const char *device_name, unsigned int *lines,38 unsigned int num_lines, unsigned int *values);39int gpiotools_set(const char *device_name, unsigned int line,40 unsigned int value);41int gpiotools_sets(const char *device_name, unsigned int *lines,42 unsigned int num_lines, unsigned int *values);43 44/* helper functions for gpio_v2_line_values bits */45static inline void gpiotools_set_bit(__u64 *b, int n)46{47 *b |= _BITULL(n);48}49 50static inline void gpiotools_change_bit(__u64 *b, int n)51{52 *b ^= _BITULL(n);53}54 55static inline void gpiotools_clear_bit(__u64 *b, int n)56{57 *b &= ~_BITULL(n);58}59 60static inline int gpiotools_test_bit(__u64 b, int n)61{62 return !!(b & _BITULL(n));63}64 65static inline void gpiotools_assign_bit(__u64 *b, int n, bool value)66{67 if (value)68 gpiotools_set_bit(b, n);69 else70 gpiotools_clear_bit(b, n);71}72 73#endif /* _GPIO_UTILS_H_ */74