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tools/gpio: add gpio basic opereations

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Add basic gpio operations. User could get/set gpio value for specific
line of gpiochip.

Reference "tools/gpio/gpio-hammer.c" or
"tools/testing/selftest/gpio/gpio-mockup-chardev.c" for how to use it.

Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>
Reviewed-by: Michael Welling <mwelling@ieee.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Bamvor Jian Zhang
2016-10-14 10:48:25 +08:00
committed by Linus Walleij
parent 26a48c4cc2
commit e1acec0e75
2 changed files with 272 additions and 0 deletions
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16
tools/gpio/gpio-utils.h
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@@ -24,4 +24,20 @@ static inline int check_prefix(const char *str, const char *prefix)
strncmp(str, prefix, strlen(prefix)) == 0;
}
int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
unsigned int nlines, unsigned int flag,
struct gpiohandle_data *data,
const char *consumer_label);
int gpiotools_set_values(const int fd, struct gpiohandle_data *data);
int gpiotools_get_values(const int fd, struct gpiohandle_data *data);
int gpiotools_release_linehandle(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 nlines, struct gpiohandle_data *data);
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 nlines, struct gpiohandle_data *data);
#endif /* _GPIO_UTILS_H_ */