Device-Tree bindings for Digital microphone (DMIC) codec This device support generic PDM digital microphone. Required properties: - compatible: should be "dmic-codec". Optional properties: - dmicen-gpios: GPIO specifier for dmic to control start and stop - num-channels: Number of microphones on this DAI - wakeup-delay-ms: Delay (in ms) after enabling the DMIC - modeswitch-delay-ms: Delay (in ms) to complete DMIC mode switch Example node: dmic_codec: dmic@0 { compatible = "dmic-codec"; dmicen-gpios = <&gpio4 3 GPIO_ACTIVE_HIGH>; num-channels = <1>; wakeup-delay-ms <50>; modeswitch-delay-ms <35>; };