add_ctls
err = add_ctls(emu, &emu1010_adc_pads_ctl,
err = add_ctls(emu, &emu1010_dac_pads_ctl,
err = add_ctls(emu, &i2c_volume_ctl,
err = add_ctls(emu, &emu1010_output_source_ctl,
err = add_ctls(emu, &emu1010_input_source_ctl,