1 CS35L36 Speaker Amplifier
2
3 Required properties:
4
5 - compatible : "cirrus,cs35l36"
6
7 - reg : the I2C address of the device for I2
8
9 - VA-supply, VP-supply : power supplies for
10 as covered in
11 Documentation/devicetree/bindings/regulator/
12
13 - cirrus,boost-ctl-millivolt : Boost Voltage
14 converter's output voltage in mV. The range
15 increments of 50mV.
16 (Default) VP
17
18 - cirrus,boost-peak-milliamp : Boost-convert
19 Configures the peak current by monitoring th
20 Range starts at 1600mA and goes to a maximum
21 50mA.
22 (Default) 4.50 Amps
23
24 - cirrus,boost-ind-nanohenry : Inductor esti
25 Seeds the digital boost converter's inductor
26 inductance value to reference.
27
28 1000 = 1uH (Default)
29 1200 = 1.2uH
30
31 Optional properties:
32 - cirrus,multi-amp-mode : Boolean to determi
33 one amplifier in the system. If more than on
34 port to prevent bus contention on the output
35
36 - cirrus,boost-ctl-select : Boost converter
37 Selects the source of the BST_CTL target VBS
38 converter to generate.
39 0x00 - Control Port Value
40 0x01 - Class H Tracking (Default)
41 0x10 - MultiDevice Sync Value
42
43 - cirrus,amp-pcm-inv : Boolean to determine
44 PCM data
45
46 - cirrus,imon-pol-inv : Boolean to determine
47 polarity of outbound IMON feedback data
48
49 - cirrus,vmon-pol-inv : Boolean to determine
50 polarity of outbound VMON feedback data
51
52 - cirrus,dcm-mode-enable : Boost converter a
53 This enables the digital boost converter to
54 (Discontinuous Conduction) mode during low l
55
56 - cirrus,weak-fet-disable : Boolean : The st
57 reduced when operating in a Weak-FET Drive M
58 a large load.
59
60 - cirrus,classh-wk-fet-delay : Weak-FET ent
61 (in ms) before the Class H algorithm switche
62 (after the audio falls and remains below the
63
64 0 = 0ms
65 1 = 5ms
66 2 = 10ms
67 3 = 50ms
68 4 = 100ms (Default)
69 5 = 200ms
70 6 = 500ms
71 7 = 1000ms
72
73 - cirrus,classh-weak-fet-thld-millivolt : We
74 Configures the signal threshold at which the
75 weak-FET operation. The range is 50mV to 700
76
77 - cirrus,temp-warn-threshold : Amplifier ov
78 Configures the threshold at which the overte
79 When the threshold is met, the overtemperatu
80 and the TEMP_WARN_EINT interrupt status bit
81 If TEMP_WARN_MASK = 0, INTb is asserted.
82
83 0 = 105C
84 1 = 115C
85 2 = 125C (Default)
86 3 = 135C
87
88 - cirrus,irq-drive-select : Selects the driv
89 output.
90
91 0 = Open-drain
92 1 = Push-pull (Default)
93
94 - cirrus,irq-gpio-select : Selects the pin t
95 interrupt output.
96
97 0 = PDM_DATA / SWIRE_SD / INT (Default)
98 1 = GPIO
99
100 Optional properties for the "cirrus,vpbr-confi
101
102 - cirrus,vpbr-en : VBST brownout prevention
103 VBST brownout prevention algorithm is enable
104
105 0 = VBST brownout prevention disabled (defau
106 1 = VBST brownout prevention enabled
107
108 See Section 7.31.1 VPBR Config for configura
109
110 - cirrus,vpbr-thld : Initial VPBR threshold.
111 threshold voltage
112
113 - cirrus,cirrus,vpbr-atk-rate : Attenuation
114 amount delay between consecutive volume atte
115 condition is present and the VP brownout con
116
117 - cirrus,vpbr-atk-vol : VP brownout preventi
118 brownout prevention attacking attenuation st
119 digital volume or analog gain modes.
120
121 - cirrus,vpbr-max-attn : Maximum attenuation
122 can apply to the audio signal.
123
124 - cirrus,vpbr-wait : Configures the delay ti
125 no longer being present and the VP brownout
126 release state.
127
128 - cirrus,vpbr-rel-rate : Attenuation release
129 between consecutive volume attenuation relea
130 is not longer present and the VP brownout is
131
132 - cirrus,vpbr-mute-en : During the attack st
133 is reached, the error condition still remain
134 is muted.
135
136 Example:
137
138 cs35l36: cs35l36@40 {
139 compatible = "cirrus,cs35l36";
140 reg = <0x40>;
141 VA-supply = <&dummy_vreg>;
142 VP-supply = <&dummy_vreg>;
143 reset-gpios = <&gpio0 54 0>;
144 interrupt-parent = <&gpio8>;
145 interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
146
147 cirrus,boost-ind-nanohenry = <1000>;
148 cirrus,boost-ctl-millivolt = <10000>;
149 cirrus,boost-peak-milliamp = <4500>;
150 cirrus,boost-ctl-select = <0x00>;
151 cirrus,weak-fet-delay = <0x04>;
152 cirrus,weak-fet-thld = <0x01>;
153 cirrus,temp-warn-threshold = <0x01>;
154 cirrus,multi-amp-mode;
155 cirrus,irq-drive-select = <0x01>;
156 cirrus,irq-gpio-select = <0x01>;
157
158 cirrus,vpbr-config {
159 cirrus,vpbr-en = <0x00>;
160 cirrus,vpbr-thld = <0x05>;
161 cirrus,vpbr-atk-rate = <0x02>;
162 cirrus,vpbr-atk-vol = <0x01>;
163 cirrus,vpbr-max-attn = <0x09>;
164 cirrus,vpbr-wait = <0x01>;
165 cirrus,vpbr-rel-rate = <0x05>;
166 cirrus,vpbr-mute-en = <0x00>;
167 };
168 };
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