@brief Set the direction of a single GPIO line to input. @param line GPIO line object. @return 0 is the operation succeeds. In case of an error this routine returns -1 and sets the last error number.
See Implementation
@brief Set the direction of a single GPIO line to input. @param line GPIO line object. @return 0 is the operation succeeds. In case of an error this routine returns -1 and sets the last error number.