rt3261 audio CODEC This device supports I2C only. Required properties: - compatible : "rt3261" - reg : the I2C address of the device. - codec-en-gpio : the enable gpio of codec. - spk-num : the number of speaker. - modem-input-mode : modem input mode (DIFFERENTIAL/SINGLE_END). - lout-to-modem_mode : line out mode. - spk-amplify : Gain control for speaker. Example: rt3261: rt3261@1c { compatible = "rt3261"; reg = <0x1c>; codec-en-gpio = <&gpio3 GPIO_D7 GPIO_ACTIVE_HIGH>; spk-num= <2>; modem-input-mode = <1>; lout-to-modem_mode = <1>; spk-amplify = <2>; };