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- STA32X audio CODEC
- The driver for this device only supports I2C.
- Required properties:
- - compatible: "st,sta32x"
- - 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.
- - Vdda-supply: regulator spec, providing 3.3V
- - Vdd3-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 chosen.
- 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,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,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,invalid-input-detect-mute:
- If present, automatic invalid input detect mute is enabled.
- Example:
- codec: sta32x@38 {
- compatible = "st,sta32x";
- 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.
- };
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