1 STA32X audio CODEC 1 STA32X audio CODEC
2 2
3 The driver for this device only supports I2C. 3 The driver for this device only supports I2C.
4 4
5 Required properties: 5 Required properties:
6 6
7 - compatible: "st,sta32x" 7 - compatible: "st,sta32x"
8 - reg: the I2C address of the device for I2C 8 - reg: the I2C address of the device for I2C
9 - reset-gpios: a GPIO spec for the reset pin 9 - reset-gpios: a GPIO spec for the reset pin. If specified, it will be
10 deasserted before communicati 10 deasserted before communication to the codec starts.
11 11
12 - power-down-gpios: a GPIO spec for the powe 12 - power-down-gpios: a GPIO spec for the power down pin. If specified,
13 it will be deasserted be 13 it will be deasserted before communication to the codec
14 starts. 14 starts.
15 15
16 - Vdda-supply: regulator spec, providing 3.3 16 - Vdda-supply: regulator spec, providing 3.3V
17 - Vdd3-supply: regulator spec, providing 3.3 17 - Vdd3-supply: regulator spec, providing 3.3V
18 - Vcc-supply: regulator spec, providing 5V - 18 - Vcc-supply: regulator spec, providing 5V - 26V
19 19
20 Optional properties: 20 Optional properties:
21 21
22 - clocks, clock-names: Clock specifier for X 22 - clocks, clock-names: Clock specifier for XTI input clock.
23 If specified, the clock will be enable 23 If specified, the clock will be enabled when the codec is probed,
24 and disabled when it is removed. The ' 24 and disabled when it is removed. The 'clock-names' must be set to 'xti'.
25 25
26 - st,output-conf: number, Selects the outpu 26 - st,output-conf: number, Selects the output configuration:
27 0: 2-channel (full-bridge) power, 2-ch 27 0: 2-channel (full-bridge) power, 2-channel data-out
28 1: 2 (half-bridge). 1 (full-bridge) on 28 1: 2 (half-bridge). 1 (full-bridge) on-board power
29 2: 2 Channel (Full-Bridge) Power, 1 Ch 29 2: 2 Channel (Full-Bridge) Power, 1 Channel FFX
30 3: 1 Channel Mono-Parallel 30 3: 1 Channel Mono-Parallel
31 If parameter is missing, mode 0 will b 31 If parameter is missing, mode 0 will be enabled.
32 This property has to be specified as ' 32 This property has to be specified as '/bits/ 8' value.
33 33
34 - st,ch1-output-mapping: Channel 1 output m 34 - st,ch1-output-mapping: Channel 1 output mapping
35 - st,ch2-output-mapping: Channel 2 output m 35 - st,ch2-output-mapping: Channel 2 output mapping
36 - st,ch3-output-mapping: Channel 3 output m 36 - st,ch3-output-mapping: Channel 3 output mapping
37 0: Channel 1 37 0: Channel 1
38 1: Channel 2 38 1: Channel 2
39 2: Channel 3 39 2: Channel 3
40 If parameter is missing, channel 1 is 40 If parameter is missing, channel 1 is chosen.
41 This properties have to be specified a 41 This properties have to be specified as '/bits/ 8' values.
42 42
43 - st,thermal-warning-recover: 43 - st,thermal-warning-recover:
44 If present, thermal warning recovery i 44 If present, thermal warning recovery is enabled.
45 45
46 - st,fault-detect-recovery: 46 - st,fault-detect-recovery:
47 If present, fault detect recovery is e 47 If present, fault detect recovery is enabled.
48 48
49 - st,thermal-warning-adjustment: 49 - st,thermal-warning-adjustment:
50 If present, thermal warning adjustment 50 If present, thermal warning adjustment is enabled.
51 51
52 - st,fault-detect-recovery: 52 - st,fault-detect-recovery:
53 If present, then fault recovery will b 53 If present, then fault recovery will be enabled.
54 54
55 - st,drop-compensation-ns: number 55 - st,drop-compensation-ns: number
56 Only required for "st,ffx-power-output 56 Only required for "st,ffx-power-output-mode" ==
57 "variable-drop-compensation". 57 "variable-drop-compensation".
58 Specifies the drop compensation in nan 58 Specifies the drop compensation in nanoseconds.
59 The value must be in the range of 0..3 59 The value must be in the range of 0..300, and only
60 multiples of 20 are allowed. Default i 60 multiples of 20 are allowed. Default is 140ns.
61 61
62 - st,max-power-use-mpcc: 62 - st,max-power-use-mpcc:
63 If present, then MPCC bits are used fo 63 If present, then MPCC bits are used for MPC coefficients,
64 otherwise standard MPC coefficients ar 64 otherwise standard MPC coefficients are used.
65 65
66 - st,max-power-corr: 66 - st,max-power-corr:
67 If present, power bridge correction fo 67 If present, power bridge correction for THD reduction near maximum
68 power output is enabled. 68 power output is enabled.
69 69
70 - st,am-reduction-mode: 70 - st,am-reduction-mode:
71 If present, FFX mode runs in AM reduct 71 If present, FFX mode runs in AM reduction mode, otherwise normal
72 FFX mode is used. 72 FFX mode is used.
73 73
74 - st,odd-pwm-speed-mode: 74 - st,odd-pwm-speed-mode:
75 If present, PWM speed mode run on odd 75 If present, PWM speed mode run on odd speed mode (341.3 kHz) on all
76 channels. If not present, normal PWM s 76 channels. If not present, normal PWM spped mode (384 kHz) will be used.
77 77
78 - st,invalid-input-detect-mute: 78 - st,invalid-input-detect-mute:
79 If present, automatic invalid input de 79 If present, automatic invalid input detect mute is enabled.
80 80
81 Example: 81 Example:
82 82
83 codec: sta32x@38 { 83 codec: sta32x@38 {
84 compatible = "st,sta32x"; 84 compatible = "st,sta32x";
85 reg = <0x1c>; 85 reg = <0x1c>;
86 clocks = <&clock>; 86 clocks = <&clock>;
87 clock-names = "xti"; 87 clock-names = "xti";
88 reset-gpios = <&gpio1 19 0>; 88 reset-gpios = <&gpio1 19 0>;
89 power-down-gpios = <&gpio1 16 0>; 89 power-down-gpios = <&gpio1 16 0>;
90 st,output-conf = /bits/ 8 <0x3>; 90 st,output-conf = /bits/ 8 <0x3>; // set output to 2-channel
91 91 // (full-bridge) power,
92 92 // 2-channel data-out
93 st,ch1-output-mapping = /bits/ 8 <0>; 93 st,ch1-output-mapping = /bits/ 8 <0>; // set channel 1 output ch 1
94 st,ch2-output-mapping = /bits/ 8 <0>; 94 st,ch2-output-mapping = /bits/ 8 <0>; // set channel 2 output ch 1
95 st,ch3-output-mapping = /bits/ 8 <0>; 95 st,ch3-output-mapping = /bits/ 8 <0>; // set channel 3 output ch 1
96 st,max-power-correction; 96 st,max-power-correction; // enables power bridge
97 97 // correction for THD reduction
98 98 // near maximum power output
99 st,invalid-input-detect-mute; 99 st,invalid-input-detect-mute; // mute if no valid digital
100 100 // audio signal is provided.
101 }; 101 };
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