Bindings/sound/st,sta32x.txt

   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 };