SR_PRIV int hantek_6xxx_update_samplerate(const struct sr_dev_inst *sdi);
SR_PRIV int hantek_6xxx_update_vdiv(const struct sr_dev_inst *sdi);
SR_PRIV int hantek_6xxx_update_channels(const struct sr_dev_inst *sdi);
SR_PRIV int hantek_6xxx_update_samplerate(const struct sr_dev_inst *sdi);
SR_PRIV int hantek_6xxx_update_vdiv(const struct sr_dev_inst *sdi);
SR_PRIV int hantek_6xxx_update_channels(const struct sr_dev_inst *sdi);