gpiotools_request_line
ret = gpiotools_request_line(device_name, lines, num_lines, config,
ret = gpiotools_request_line(device_name, lines, num_lines,
ret = gpiotools_request_line(device_name, lines, num_lines,
ret = gpiotools_request_line(device_name, lines, num_lines,
int gpiotools_request_line(const char *device_name,