WM8988_RDAC
SOC_DOUBLE_R_TLV("PCM Volume", WM8988_LDAC, WM8988_RDAC, 0, 255, 0, dac_tlv),
case WM8988_RDAC:
snd_soc_component_update_bits(component, WM8988_RDAC, 0x0100, 0x0100);