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+STA350 audio CODEC
+
+The driver for this device only supports I2C.
+
+Required properties:
+
+  - compatible: "st,sta350"
+  - reg: the I2C address of the device for I2C
+  - reset-gpios: a GPIO spec for the reset pin. If specified, it will be
+                 deasserted before communication to the codec starts.
+
+  - power-down-gpios: a GPIO spec for the power down pin. If specified,
+                      it will be deasserted before communication to the codec
+                      starts.
+
+  - vdd-dig-supply: regulator spec, providing 3.3V
+  - vdd-pll-supply: regulator spec, providing 3.3V
+  - vcc-supply: regulator spec, providing 5V - 26V
+
+Optional properties:
+
+  -  st,output-conf: number, Selects the output configuration:
+        0: 2-channel (full-bridge) power, 2-channel data-out
+        1: 2 (half-bridge). 1 (full-bridge) on-board power
+        2: 2 Channel (Full-Bridge) Power, 1 Channel FFX
+        3: 1 Channel Mono-Parallel
+        If parameter is missing, mode 0 will be enabled.
+        This property has to be specified as '/bits/ 8' value.
+
+  -  st,ch1-output-mapping: Channel 1 output mapping
+  -  st,ch2-output-mapping: Channel 2 output mapping
+  -  st,ch3-output-mapping: Channel 3 output mapping
+        0: Channel 1
+        1: Channel 2
+        2: Channel 3
+        If parameter is missing, channel 1 is choosen.
+        This properties have to be specified as '/bits/ 8' values.
+
+  -  st,thermal-warning-recover:
+        If present, thermal warning recovery is enabled.
+
+  -  st,thermal-warning-adjustment:
+        If present, thermal warning adjustment is enabled.
+
+  -  st,fault-detect-recovery:
+        If present, then fault recovery will be enabled.
+
+  -  st,ffx-power-output-mode: string
+        The FFX power output mode selects how the FFX output timing is
+        configured. Must be one of these values:
+          -  "drop-compensation"
+          -  "tapered-compensation"
+          -  "full-power-mode"
+          -  "variable-drop-compensation" (default)
+
+  -  st,drop-compensation-ns: number
+        Only required for "st,ffx-power-output-mode" ==
+        "variable-drop-compensation".
+        Specifies the drop compensation in nanoseconds.
+        The value must be in the range of 0..300, and only
+        multiples of 20 are allowed. Default is 140ns.
+
+  -  st,overcurrent-warning-adjustment:
+        If present, overcurrent warning adjustment is enabled.
+
+  -  st,max-power-use-mpcc:
+        If present, then MPCC bits are used for MPC coefficients,
+        otherwise standard MPC coefficients are used.
+
+  -  st,max-power-corr:
+        If present, power bridge correction for THD reduction near maximum
+        power output is enabled.
+
+  -  st,am-reduction-mode:
+        If present, FFX mode runs in AM reduction mode, otherwise normal
+        FFX mode is used.
+
+  -  st,odd-pwm-speed-mode:
+        If present, PWM speed mode run on odd speed mode (341.3 kHz) on all
+        channels. If not present, normal PWM spped mode (384 kHz) will be used.
+
+  -  st,distortion-compensation:
+        If present, distortion compensation variable uses DCC coefficient.
+        If not present, preset DC coefficient is used.
+
+  -  st,invalid-input-detect-mute:
+        If present, automatic invalid input detect mute is enabled.
+
+  -  st,activate-mute-output:
+        If present, a mute output will be activated in ase the volume will
+        reach a value lower than -76 dBFS.
+
+  -  st,bridge-immediate-off:
+        If present, the bridge will be switched off immediately after the
+        power-down-gpio goes low. Otherwise, the bridge will wait for 13
+        million clock cycles to pass before shutting down.
+
+  -  st,noise-shape-dc-cut:
+        If present, the noise-shaping technique on the DC cutoff filter are
+        enabled.
+
+  -  st,powerdown-master-volume:
+        If present, the power-down pin and I2C power-down functions will
+        act on the master volume. Otherwise, the functions will act on the
+        mute commands.
+
+  -  st,powerdown-delay-divider:
+        If present, the bridge power-down time will be divided by the provided
+        value. If not specified, a divider of 1 will be used. Allowed values
+        are 1, 2, 4, 8, 16, 32, 64 and 128.
+        This property has to be specified as '/bits/ 8' value.
+
+Example:
+
+codec: sta350@38 {
+        compatible = "st,sta350";
+        reg = <0x1c>;
+        reset-gpios = <&gpio1 19 0>;
+        power-down-gpios = <&gpio1 16 0>;
+        st,output-conf = /bits/ 8  <0x3>;       // set output to 2-channel
+                                                // (full-bridge) power,
+                                                // 2-channel data-out
+        st,ch1-output-mapping = /bits/ 8 <0>;   // set channel 1 output ch 1
+        st,ch2-output-mapping = /bits/ 8 <0>;   // set channel 2 output ch 1
+        st,ch3-output-mapping = /bits/ 8 <0>;   // set channel 3 output ch 1
+        st,max-power-correction;                // enables power bridge
+                                                // correction for THD reduction
+                                                // near maximum power output
+        st,invalid-input-detect-mute;           // mute if no valid digital
+                                                // audio signal is provided.
+};