DAC_RES
uinfo->value.integer.max = DAC_RES; /* 0dB, 0.5dB step */
#define DAC_MIN (DAC_0dB - DAC_RES)
#define DAC_MIN (DAC_0dB - DAC_RES)
uinfo->value.integer.max = DAC_RES; /* 0dB, 0.5dB step */
uinfo->value.integer.max = DAC_RES; /* 0dB */
uinfo->value.integer.max = DAC_RES;