WM8770_IFACECTRL
SOC_SINGLE("ADC Highpass Filter Switch", WM8770_IFACECTRL, 8, 1, 1)
snd_soc_component_update_bits(component, WM8770_IFACECTRL, 0xf, iface);
snd_soc_component_update_bits(component, WM8770_IFACECTRL, 0x30, iface);