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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/gpio/gpio-utils.h | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/gpio/gpio-utils.h')
-rw-r--r-- | tools/gpio/gpio-utils.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/tools/gpio/gpio-utils.h b/tools/gpio/gpio-utils.h new file mode 100644 index 000000000..6c69a9f1c --- /dev/null +++ b/tools/gpio/gpio-utils.h @@ -0,0 +1,79 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * GPIO tools - utility helpers library for the GPIO tools + * + * Copyright (C) 2015 Linus Walleij + * + * Portions copied from iio_utils and lssio: + * Copyright (c) 2010 Manuel Stahl <manuel.stahl@iis.fraunhofer.de> + * Copyright (c) 2008 Jonathan Cameron + * * + */ +#ifndef _GPIO_UTILS_H_ +#define _GPIO_UTILS_H_ + +#include <stdbool.h> +#include <string.h> +#include <linux/types.h> + +#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) + +static inline int check_prefix(const char *str, const char *prefix) +{ + return strlen(str) > strlen(prefix) && + strncmp(str, prefix, strlen(prefix)) == 0; +} + +int gpiotools_request_linehandle(const char *device_name, unsigned int *lines, + unsigned int num_lines, unsigned int flag, + struct gpiohandle_data *data, + const char *consumer_label); +int gpiotools_release_linehandle(const int fd); + +int gpiotools_request_line(const char *device_name, + unsigned int *lines, + unsigned int num_lines, + struct gpio_v2_line_config *config, + const char *consumer); +int gpiotools_set_values(const int fd, struct gpio_v2_line_values *values); +int gpiotools_get_values(const int fd, struct gpio_v2_line_values *values); +int gpiotools_release_line(const int fd); + +int gpiotools_get(const char *device_name, unsigned int line); +int gpiotools_gets(const char *device_name, unsigned int *lines, + unsigned int num_lines, unsigned int *values); +int gpiotools_set(const char *device_name, unsigned int line, + unsigned int value); +int gpiotools_sets(const char *device_name, unsigned int *lines, + unsigned int num_lines, unsigned int *values); + +/* helper functions for gpio_v2_line_values bits */ +static inline void gpiotools_set_bit(__u64 *b, int n) +{ + *b |= _BITULL(n); +} + +static inline void gpiotools_change_bit(__u64 *b, int n) +{ + *b ^= _BITULL(n); +} + +static inline void gpiotools_clear_bit(__u64 *b, int n) +{ + *b &= ~_BITULL(n); +} + +static inline int gpiotools_test_bit(__u64 b, int n) +{ + return !!(b & _BITULL(n)); +} + +static inline void gpiotools_assign_bit(__u64 *b, int n, bool value) +{ + if (value) + gpiotools_set_bit(b, n); + else + gpiotools_clear_bit(b, n); +} + +#endif /* _GPIO_UTILS_H_ */ |