CS42L51_INTF_CTL
intf_ctl = snd_soc_component_read(component, CS42L51_INTF_CTL);
ret = snd_soc_component_write(component, CS42L51_INTF_CTL, intf_ctl);
case CS42L51_INTF_CTL:
case CS42L51_INTF_CTL: