st,sta32x.txt

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    1 STA32X audio CODEC
    2 
    3 The driver for this device only supports I2C.
    4 
    5 Required properties:
    6 
    7   - compatible: "st,sta32x"
    8   - reg: the I2C address of the device for I2C
    9   - reset-gpios: a GPIO spec for the reset pin. If specified, it will be
   10                  deasserted before communication to the codec starts.
   11 
   12   - power-down-gpios: a GPIO spec for the power down pin. If specified,
   13                       it will be deasserted before communication to the codec
   14                       starts.
   15 
   16   - Vdda-supply: regulator spec, providing 3.3V
   17   - Vdd3-supply: regulator spec, providing 3.3V
   18   - Vcc-supply: regulator spec, providing 5V - 26V
   19 
   20 Optional properties:
   21 
   22   - clocks, clock-names: Clock specifier for XTI input clock.
   23         If specified, the clock will be enabled when the codec is probed,
   24         and disabled when it is removed. The 'clock-names' must be set to 'xti'.
   25 
   26   -  st,output-conf: number, Selects the output configuration:
   27         0: 2-channel (full-bridge) power, 2-channel data-out
   28         1: 2 (half-bridge). 1 (full-bridge) on-board power
   29         2: 2 Channel (Full-Bridge) Power, 1 Channel FFX
   30         3: 1 Channel Mono-Parallel
   31         If parameter is missing, mode 0 will be enabled.
   32         This property has to be specified as '/bits/ 8' value.
   33 
   34   -  st,ch1-output-mapping: Channel 1 output mapping
   35   -  st,ch2-output-mapping: Channel 2 output mapping
   36   -  st,ch3-output-mapping: Channel 3 output mapping
   37         0: Channel 1
   38         1: Channel 2
   39         2: Channel 3
   40         If parameter is missing, channel 1 is chosen.
   41         This properties have to be specified as '/bits/ 8' values.
   42 
   43   -  st,thermal-warning-recover:
   44         If present, thermal warning recovery is enabled.
   45 
   46   - st,fault-detect-recovery:
   47         If present, fault detect recovery is enabled.
   48 
   49   -  st,thermal-warning-adjustment:
   50         If present, thermal warning adjustment is enabled.
   51 
   52   -  st,fault-detect-recovery:
   53         If present, then fault recovery will be enabled.
   54 
   55   -  st,drop-compensation-ns: number
   56         Only required for "st,ffx-power-output-mode" ==
   57         "variable-drop-compensation".
   58         Specifies the drop compensation in nanoseconds.
   59         The value must be in the range of 0..300, and only
   60         multiples of 20 are allowed. Default is 140ns.
   61 
   62   -  st,max-power-use-mpcc:
   63         If present, then MPCC bits are used for MPC coefficients,
   64         otherwise standard MPC coefficients are used.
   65 
   66   -  st,max-power-corr:
   67         If present, power bridge correction for THD reduction near maximum
   68         power output is enabled.
   69 
   70   -  st,am-reduction-mode:
   71         If present, FFX mode runs in AM reduction mode, otherwise normal
   72         FFX mode is used.
   73 
   74   -  st,odd-pwm-speed-mode:
   75         If present, PWM speed mode run on odd speed mode (341.3 kHz) on all
   76         channels. If not present, normal PWM spped mode (384 kHz) will be used.
   77 
   78   -  st,invalid-input-detect-mute:
   79         If present, automatic invalid input detect mute is enabled.
   80 
   81 Example:
   82 
   83 codec: sta32x@38 {
   84         compatible = "st,sta32x";
   85         reg = <0x1c>;
   86         clocks = <&clock>;
   87         clock-names = "xti";
   88         reset-gpios = <&gpio1 19 0>;
   89         power-down-gpios = <&gpio1 16 0>;
   90         st,output-conf = /bits/ 8  <0x3>;       // set output to 2-channel
   91                                                 // (full-bridge) power,
   92                                                 // 2-channel data-out
   93         st,ch1-output-mapping = /bits/ 8 <0>;   // set channel 1 output ch 1
   94         st,ch2-output-mapping = /bits/ 8 <0>;   // set channel 2 output ch 1
   95         st,ch3-output-mapping = /bits/ 8 <0>;   // set channel 3 output ch 1
   96         st,max-power-correction;                // enables power bridge
   97                                                 // correction for THD reduction
   98                                                 // near maximum power output
   99         st,invalid-input-detect-mute;           // mute if no valid digital
  100                                                 // audio signal is provided.
  101 };

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