WM8988_IFACE
snd_soc_component_write(component, WM8988_IFACE, iface);
u16 iface = snd_soc_component_read(component, WM8988_IFACE) & 0x1f3;
snd_soc_component_write(component, WM8988_IFACE, iface);
case WM8988_IFACE: