1 STA350 audio CODEC 1 STA350 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,sta350" 7 - compatible: "st,sta350"
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 - vdd-dig-supply: regulator spec, providing 16 - vdd-dig-supply: regulator spec, providing 3.3V
17 - vdd-pll-supply: regulator spec, providing 17 - vdd-pll-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 - st,output-conf: number, Selects the outpu 22 - st,output-conf: number, Selects the output configuration:
23 0: 2-channel (full-bridge) power, 2-ch 23 0: 2-channel (full-bridge) power, 2-channel data-out
24 1: 2 (half-bridge). 1 (full-bridge) on 24 1: 2 (half-bridge). 1 (full-bridge) on-board power
25 2: 2 Channel (Full-Bridge) Power, 1 Ch 25 2: 2 Channel (Full-Bridge) Power, 1 Channel FFX
26 3: 1 Channel Mono-Parallel 26 3: 1 Channel Mono-Parallel
27 If parameter is missing, mode 0 will b 27 If parameter is missing, mode 0 will be enabled.
28 This property has to be specified as ' 28 This property has to be specified as '/bits/ 8' value.
29 29
30 - st,ch1-output-mapping: Channel 1 output m 30 - st,ch1-output-mapping: Channel 1 output mapping
31 - st,ch2-output-mapping: Channel 2 output m 31 - st,ch2-output-mapping: Channel 2 output mapping
32 - st,ch3-output-mapping: Channel 3 output m 32 - st,ch3-output-mapping: Channel 3 output mapping
33 0: Channel 1 33 0: Channel 1
34 1: Channel 2 34 1: Channel 2
35 2: Channel 3 35 2: Channel 3
36 If parameter is missing, channel 1 is 36 If parameter is missing, channel 1 is chosen.
37 This properties have to be specified a 37 This properties have to be specified as '/bits/ 8' values.
38 38
39 - st,thermal-warning-recover: 39 - st,thermal-warning-recover:
40 If present, thermal warning recovery i 40 If present, thermal warning recovery is enabled.
41 41
42 - st,thermal-warning-adjustment: 42 - st,thermal-warning-adjustment:
43 If present, thermal warning adjustment 43 If present, thermal warning adjustment is enabled.
44 44
45 - st,fault-detect-recovery: 45 - st,fault-detect-recovery:
46 If present, then fault recovery will b 46 If present, then fault recovery will be enabled.
47 47
48 - st,ffx-power-output-mode: string 48 - st,ffx-power-output-mode: string
49 The FFX power output mode selects how 49 The FFX power output mode selects how the FFX output timing is
50 configured. Must be one of these value 50 configured. Must be one of these values:
51 - "drop-compensation" 51 - "drop-compensation"
52 - "tapered-compensation" 52 - "tapered-compensation"
53 - "full-power-mode" 53 - "full-power-mode"
54 - "variable-drop-compensation" (def 54 - "variable-drop-compensation" (default)
55 55
56 - st,drop-compensation-ns: number 56 - st,drop-compensation-ns: number
57 Only required for "st,ffx-power-output 57 Only required for "st,ffx-power-output-mode" ==
58 "variable-drop-compensation". 58 "variable-drop-compensation".
59 Specifies the drop compensation in nan 59 Specifies the drop compensation in nanoseconds.
60 The value must be in the range of 0..3 60 The value must be in the range of 0..300, and only
61 multiples of 20 are allowed. Default i 61 multiples of 20 are allowed. Default is 140ns.
62 62
63 - st,overcurrent-warning-adjustment: 63 - st,overcurrent-warning-adjustment:
64 If present, overcurrent warning adjust 64 If present, overcurrent warning adjustment is enabled.
65 65
66 - st,max-power-use-mpcc: 66 - st,max-power-use-mpcc:
67 If present, then MPCC bits are used fo 67 If present, then MPCC bits are used for MPC coefficients,
68 otherwise standard MPC coefficients ar 68 otherwise standard MPC coefficients are used.
69 69
70 - st,max-power-corr: 70 - st,max-power-corr:
71 If present, power bridge correction fo 71 If present, power bridge correction for THD reduction near maximum
72 power output is enabled. 72 power output is enabled.
73 73
74 - st,am-reduction-mode: 74 - st,am-reduction-mode:
75 If present, FFX mode runs in AM reduct 75 If present, FFX mode runs in AM reduction mode, otherwise normal
76 FFX mode is used. 76 FFX mode is used.
77 77
78 - st,odd-pwm-speed-mode: 78 - st,odd-pwm-speed-mode:
79 If present, PWM speed mode run on odd 79 If present, PWM speed mode run on odd speed mode (341.3 kHz) on all
80 channels. If not present, normal PWM s 80 channels. If not present, normal PWM speed mode (384 kHz) will be used.
81 81
82 - st,distortion-compensation: 82 - st,distortion-compensation:
83 If present, distortion compensation va 83 If present, distortion compensation variable uses DCC coefficient.
84 If not present, preset DC coefficient 84 If not present, preset DC coefficient is used.
85 85
86 - st,invalid-input-detect-mute: 86 - st,invalid-input-detect-mute:
87 If present, automatic invalid input de 87 If present, automatic invalid input detect mute is enabled.
88 88
89 - st,activate-mute-output: 89 - st,activate-mute-output:
90 If present, a mute output will be acti 90 If present, a mute output will be activated in ase the volume will
91 reach a value lower than -76 dBFS. 91 reach a value lower than -76 dBFS.
92 92
93 - st,bridge-immediate-off: 93 - st,bridge-immediate-off:
94 If present, the bridge will be switche 94 If present, the bridge will be switched off immediately after the
95 power-down-gpio goes low. Otherwise, t 95 power-down-gpio goes low. Otherwise, the bridge will wait for 13
96 million clock cycles to pass before sh 96 million clock cycles to pass before shutting down.
97 97
98 - st,noise-shape-dc-cut: 98 - st,noise-shape-dc-cut:
99 If present, the noise-shaping techniqu 99 If present, the noise-shaping technique on the DC cutoff filter are
100 enabled. 100 enabled.
101 101
102 - st,powerdown-master-volume: 102 - st,powerdown-master-volume:
103 If present, the power-down pin and I2C 103 If present, the power-down pin and I2C power-down functions will
104 act on the master volume. Otherwise, t 104 act on the master volume. Otherwise, the functions will act on the
105 mute commands. 105 mute commands.
106 106
107 - st,powerdown-delay-divider: 107 - st,powerdown-delay-divider:
108 If present, the bridge power-down time 108 If present, the bridge power-down time will be divided by the provided
109 value. If not specified, a divider of 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. 110 are 1, 2, 4, 8, 16, 32, 64 and 128.
111 This property has to be specified as ' 111 This property has to be specified as '/bits/ 8' value.
112 112
113 Example: 113 Example:
114 114
115 codec: sta350@38 { 115 codec: sta350@38 {
116 compatible = "st,sta350"; 116 compatible = "st,sta350";
117 reg = <0x1c>; 117 reg = <0x1c>;
118 reset-gpios = <&gpio1 19 0>; 118 reset-gpios = <&gpio1 19 0>;
119 power-down-gpios = <&gpio1 16 0>; 119 power-down-gpios = <&gpio1 16 0>;
120 st,output-conf = /bits/ 8 <0x3>; 120 st,output-conf = /bits/ 8 <0x3>; // set output to 2-channel
121 121 // (full-bridge) power,
122 122 // 2-channel data-out
123 st,ch1-output-mapping = /bits/ 8 <0>; 123 st,ch1-output-mapping = /bits/ 8 <0>; // set channel 1 output ch 1
124 st,ch2-output-mapping = /bits/ 8 <0>; 124 st,ch2-output-mapping = /bits/ 8 <0>; // set channel 2 output ch 1
125 st,ch3-output-mapping = /bits/ 8 <0>; 125 st,ch3-output-mapping = /bits/ 8 <0>; // set channel 3 output ch 1
126 st,max-power-correction; 126 st,max-power-correction; // enables power bridge
127 127 // correction for THD reduction
128 128 // near maximum power output
129 st,invalid-input-detect-mute; 129 st,invalid-input-detect-mute; // mute if no valid digital
130 130 // audio signal is provided.
131 }; 131 };
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