3 The driver for this device only supports I2C.
7 - compatible: "st,sta350"
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.
12 - power-down-gpios: a GPIO spec for the power down pin. If specified,
13 it will be deasserted before communication to the codec
16 - vdd-dig-supply: regulator spec, providing 3.3V
17 - vdd-pll-supply: regulator spec, providing 3.3V
18 - vcc-supply: regulator spec, providing 5V - 26V
22 - st,output-conf: number, Selects the output configuration:
23 0: 2-channel (full-bridge) power, 2-channel data-out
24 1: 2 (half-bridge). 1 (full-bridge) on-board power
25 2: 2 Channel (Full-Bridge) Power, 1 Channel FFX
26 3: 1 Channel Mono-Parallel
27 If parameter is missing, mode 0 will be enabled.
28 This property has to be specified as '/bits/ 8' value.
30 - st,ch1-output-mapping: Channel 1 output mapping
31 - st,ch2-output-mapping: Channel 2 output mapping
32 - st,ch3-output-mapping: Channel 3 output mapping
36 If parameter is missing, channel 1 is chosen.
37 This properties have to be specified as '/bits/ 8' values.
39 - st,thermal-warning-recover:
40 If present, thermal warning recovery is enabled.
42 - st,thermal-warning-adjustment:
43 If present, thermal warning adjustment is enabled.
45 - st,fault-detect-recovery:
46 If present, then fault recovery will be enabled.
48 - st,ffx-power-output-mode: string
49 The FFX power output mode selects how the FFX output timing is
50 configured. Must be one of these values:
52 - "tapered-compensation"
54 - "variable-drop-compensation" (default)
56 - st,drop-compensation-ns: number
57 Only required for "st,ffx-power-output-mode" ==
58 "variable-drop-compensation".
59 Specifies the drop compensation in nanoseconds.
60 The value must be in the range of 0..300, and only
61 multiples of 20 are allowed. Default is 140ns.
63 - st,overcurrent-warning-adjustment:
64 If present, overcurrent warning adjustment is enabled.
66 - st,max-power-use-mpcc:
67 If present, then MPCC bits are used for MPC coefficients,
68 otherwise standard MPC coefficients are used.
71 If present, power bridge correction for THD reduction near maximum
72 power output is enabled.
74 - st,am-reduction-mode:
75 If present, FFX mode runs in AM reduction mode, otherwise normal
78 - st,odd-pwm-speed-mode:
79 If present, PWM speed mode run on odd speed mode (341.3 kHz) on all
80 channels. If not present, normal PWM spped mode (384 kHz) will be used.
82 - st,distortion-compensation:
83 If present, distortion compensation variable uses DCC coefficient.
84 If not present, preset DC coefficient is used.
86 - st,invalid-input-detect-mute:
87 If present, automatic invalid input detect mute is enabled.
89 - st,activate-mute-output:
90 If present, a mute output will be activated in ase the volume will
91 reach a value lower than -76 dBFS.
93 - st,bridge-immediate-off:
94 If present, the bridge will be switched off immediately after the
95 power-down-gpio goes low. Otherwise, the bridge will wait for 13
96 million clock cycles to pass before shutting down.
98 - st,noise-shape-dc-cut:
99 If present, the noise-shaping technique on the DC cutoff filter are
102 - st,powerdown-master-volume:
103 If present, the power-down pin and I2C power-down functions will
104 act on the master volume. Otherwise, the functions will act on the
107 - st,powerdown-delay-divider:
108 If present, the bridge power-down time will be divided by the provided
109 value. If not specified, a divider of 1 will be used. Allowed values
110 are 1, 2, 4, 8, 16, 32, 64 and 128.
111 This property has to be specified as '/bits/ 8' value.
116 compatible = "st,sta350";
118 reset-gpios = <&gpio1 19 0>;
119 power-down-gpios = <&gpio1 16 0>;
120 st,output-conf = /bits/ 8 <0x3>; // set output to 2-channel
121 // (full-bridge) power,
122 // 2-channel data-out
123 st,ch1-output-mapping = /bits/ 8 <0>; // set channel 1 output ch 1
124 st,ch2-output-mapping = /bits/ 8 <0>; // set channel 2 output ch 1
125 st,ch3-output-mapping = /bits/ 8 <0>; // set channel 3 output ch 1
126 st,max-power-correction; // enables power bridge
127 // correction for THD reduction
128 // near maximum power output
129 st,invalid-input-detect-mute; // mute if no valid digital
130 // audio signal is provided.