WM8750_LOUT1V
SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8750_LOUT1V,
SOC_DOUBLE_R("Headphone Playback Volume", WM8750_LOUT1V, WM8750_ROUT1V,
snd_soc_component_update_bits(component, WM8750_LOUT1V, 0x0100, 0x0100);