spdo2dac         2430 sound/pci/cmipci.c DEFINE_BIT_SWITCH_ARG(spdo2dac, CM_REG_FUNCTRL1, CM_SPDO2DAC, 0, 1);
spdo2dac         2611 sound/pci/cmipci.c 	DEFINE_MIXER_SWITCH("IEC958 Out To DAC", spdo2dac),