1 CS35L33 Speaker Amplifier
5 - compatible : "cirrus,cs35l33"
7 - reg : the I2C address of the device for I2C
9 - VA-supply, VP-supply : power supplies for the device,
11 Documentation/devicetree/bindings/regulator/regulator.txt.
15 - reset-gpios : gpio used to reset the amplifier
17 - interrupt-parent : Specifies the phandle of the interrupt controller to
18 which the IRQs from CS35L33 are delivered to.
19 - interrupts : IRQ line info CS35L33.
20 (See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
21 for further information relating to interrupt properties)
23 - cirrus,boost-ctl : Booster voltage use to supply the amp. If the value is
24 0, then VBST = VP. If greater than 0, the boost voltage will be 3300mV with
25 a value of 1 and will increase at a step size of 100mV until a maximum of
28 - cirrus,ramp-rate : On power up, it affects the time from when the power
29 up sequence begins to the time the audio reaches a full-scale output.
30 On power down, it affects the time from when the power-down sequence
31 begins to when the amplifier disables the PWM outputs. If this property
32 is not set then soft ramping will be disabled and ramp time would be
33 20ms. If this property is set to 0,1,2,3 then ramp times would be 40ms,
34 60ms,100ms,175ms respectively for 48KHz sample rate.
36 - cirrus,boost-ipk : The maximum current allowed for the boost converter.
37 The range starts at 1850000uA and goes to a maximum of 3600000uA
38 with a step size of 15625uA. The default is 2500000uA.
40 - cirrus,imon-adc-scale : Configures the scaling of data bits from the IMON
41 ADC data word. This property can be set as a value of 0 for bits 15 down
42 to 0, 6 for 21 down to 6, 7, for 22 down to 7, 8 for 23 down to 8.
45 Optional H/G Algorithm sub-node:
47 The cs35l33 node can have a single "cirrus,hg-algo" sub-node that will enable
48 the internal H/G Algorithm.
50 - cirrus,hg-algo : Sub-node for internal Class H/G algorithm that
51 controls the amplifier supplies.
53 Optional properties for the "cirrus,hg-algo" sub-node:
55 - cirrus,mem-depth : Memory depth for the Class H/G algorithm measured in
56 LRCLK cycles. If this property is set to 0, 1, 2, or 3 then the memory
57 depths will be 1, 4, 8, 16 LRCLK cycles. The default is 16 LRCLK cycles.
59 cirrus,release-rate : The number of consecutive LRCLK periods before
60 allowing release condition tracking updates. The number of LRCLK periods
61 start at 3 to a maximum of 255.
63 - cirrus,ldo-thld : Configures the signal threshold at which the PWM output
64 stage enters LDO operation. Starts as a default value of 50mV for a value
65 of 1 and increases with a step size of 50mV to a maximum of 750mV (value of
68 - cirrus,ldo-path-disable : This is a boolean property. If present, the H/G
69 algorithm uses the max detection path. If not present, the LDO
70 detection path is used.
72 - cirrus,ldo-entry-delay : The LDO entry delay in milliseconds before the H/G
73 algorithm switches to the LDO voltage. This property can be set to values
74 from 0 to 7 for delays of 5ms, 10ms, 50ms, 100ms, 200ms, 500ms, 1000ms.
77 - cirrus,vp-hg-auto : This is a boolean property. When set, class H/G VPhg
78 automatic updating is enabled.
80 - cirrus,vp-hg : Class H/G algorithm VPhg. Controls the H/G algorithm's
81 reference to the VP voltage for when to start generating a boosted VBST.
82 The reference voltage starts at 3000mV with a value of 0x3 and is increased
83 by 100mV per step to a maximum of 5500mV.
85 - cirrus,vp-hg-rate : The rate (number of LRCLK periods) at which the VPhg is
86 allowed to increase to a higher voltage when using VPhg automatic
87 tracking. This property can be set to values from 0 to 3 with rates of 128
88 periods, 2048 periods, 32768 periods, and 524288 periods.
89 The default is 32768 periods.
91 - cirrus,vp-hg-va : VA calculation reference for automatic VPhg tracking
92 using VPMON. This property can be set to values from 0 to 6 starting at
93 1800mV with a step size of 50mV up to a maximum value of 1750mV.
99 compatible = "cirrus,cs35l33";
102 VA-supply = <&ldo5_reg>;
103 VP-supply = <&ldo5_reg>;
105 interrupt-parent = <&gpio8>;
106 interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
108 reset-gpios = <&cs47l91 34 0>;
110 cirrus,ramp-rate = <0x0>;
111 cirrus,boost-ctl = <0x30>; /* VBST = 8000mV */
112 cirrus,boost-ipk = <0xE0>; /* 3600mA */
113 cirrus,imon-adc-scale = <0> /* Bits 15 down to 0 */
116 cirrus,mem-depth = <0x3>;
117 cirrus,release-rate = <0x3>;
118 cirrus,ldo-thld = <0x1>;
119 cirrus,ldo-path-disable = <0x0>;
120 cirrus,ldo-entry-delay=<0x4>;
123 cirrus,vp-hg-rate=<0x2>;
124 cirrus,vp-hg-va=<0x0>;