1STA32X audio CODEC
2
3The driver for this device only supports I2C.
4
5Required 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
20Optional properties:
21
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.
29
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
33	0: Channel 1
34	1: Channel 2
35	2: Channel 3
36	If parameter is missing, channel 1 is chosen.
37	This properties have to be specified as '/bits/ 8' values.
38
39  -  st,thermal-warning-recover:
40	If present, thermal warning recovery is enabled.
41
42  -  st,thermal-warning-adjustment:
43	If present, thermal warning adjustment is enabled.
44
45  -  st,fault-detect-recovery:
46	If present, then fault recovery will be enabled.
47
48  -  st,drop-compensation-ns: number
49	Only required for "st,ffx-power-output-mode" ==
50	"variable-drop-compensation".
51	Specifies the drop compensation in nanoseconds.
52	The value must be in the range of 0..300, and only
53	multiples of 20 are allowed. Default is 140ns.
54
55  -  st,max-power-use-mpcc:
56	If present, then MPCC bits are used for MPC coefficients,
57	otherwise standard MPC coefficients are used.
58
59  -  st,max-power-corr:
60	If present, power bridge correction for THD reduction near maximum
61	power output is enabled.
62
63  -  st,am-reduction-mode:
64	If present, FFX mode runs in AM reduction mode, otherwise normal
65	FFX mode is used.
66
67  -  st,odd-pwm-speed-mode:
68	If present, PWM speed mode run on odd speed mode (341.3 kHz) on all
69	channels. If not present, normal PWM spped mode (384 kHz) will be used.
70
71  -  st,invalid-input-detect-mute:
72	If present, automatic invalid input detect mute is enabled.
73
74Example:
75
76codec: sta32x@38 {
77	compatible = "st,sta32x";
78	reg = <0x1c>;
79	reset-gpios = <&gpio1 19 0>;
80	power-down-gpios = <&gpio1 16 0>;
81	st,output-conf = /bits/ 8  <0x3>;	// set output to 2-channel
82						// (full-bridge) power,
83						// 2-channel data-out
84	st,ch1-output-mapping = /bits/ 8 <0>;	// set channel 1 output ch 1
85	st,ch2-output-mapping = /bits/ 8 <0>;	// set channel 2 output ch 1
86	st,ch3-output-mapping = /bits/ 8 <0>;	// set channel 3 output ch 1
87	st,max-power-correction;		// enables power bridge
88						// correction for THD reduction
89						// near maximum power output
90	st,invalid-input-detect-mute;		// mute if no valid digital
91						// audio signal is provided.
92};
93