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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