SR_PRIV int std_dev_clear(const struct sr_dev_driver *driver,
std_dev_clear_callback clear_private);
SR_PRIV int std_serial_dev_close(struct sr_dev_inst *sdi);
SR_PRIV int std_dev_clear(const struct sr_dev_driver *driver,
std_dev_clear_callback clear_private);
SR_PRIV int std_serial_dev_close(struct sr_dev_inst *sdi);