WM8974_COMP
SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),