+SR_PRIV int scpi_cmd_resp(const struct sr_dev_inst *sdi, GVariant **gvar,
+ const GVariantType *gvtype, int command, ...);
+SR_PRIV int select_channel(const struct sr_dev_inst *sdi, struct sr_channel *ch);
+SR_PRIV struct sr_channel *next_enabled_channel(const struct sr_dev_inst *sdi,
+ struct sr_channel *cur_channel);