WM8993_AUDIO_INTERFACE_4
unsigned int aif4 = snd_soc_component_read(component, WM8993_AUDIO_INTERFACE_4);
snd_soc_component_write(component, WM8993_AUDIO_INTERFACE_4, aif4);
aif4 = snd_soc_component_read(component, WM8993_AUDIO_INTERFACE_4);
snd_soc_component_write(component, WM8993_AUDIO_INTERFACE_4, aif4);
case WM8993_AUDIO_INTERFACE_4: