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  - 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
81Example:
82
83codec: 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};
102