AK4104 S/PDIF transmitter This device supports SPI mode only. Required properties: - compatible : "asahi-kasei,ak4104" - reg : The chip select number on the SPI bus - vdd-supply : A regulator node, providing 2.7V - 3.6V Optional properties: - reset-gpios : a GPIO spec for the reset pin. If specified, it will be deasserted before communication to the device starts. Example: spdif: ak4104@0 { compatible = "asahi-kasei,ak4104"; reg = <0>; spi-max-frequency = <5000000>; vdd-supply = <&vdd_3v3_reg>; };