108 lines
3.2 KiB
Plaintext
Executable file
108 lines
3.2 KiB
Plaintext
Executable file
CS42L42 audio CODEC
|
|
|
|
Required properties:
|
|
|
|
- compatible : "cirrus,cs42l42"
|
|
|
|
- reg : the I2C address of the device for I2C.
|
|
|
|
- VP-supply, VCP-supply, VD_FILT-supply, VL-supply, VA-supply :
|
|
power supplies for the device, as covered in
|
|
Documentation/devicetree/bindings/regulator/regulator.txt.
|
|
|
|
Optional properties:
|
|
|
|
- reset-gpios : a GPIO spec for the reset pin. If specified, it will be
|
|
deasserted before communication to the codec starts.
|
|
|
|
- interrupts : IRQ line info CS42L42.
|
|
(See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
|
|
for further information relating to interrupt properties)
|
|
|
|
- cirrus,ts-inv : Boolean property. For jacks that invert the tip sense
|
|
polarity. Normal jacks will short tip sense pin to HS1 when headphones are
|
|
plugged in and leave tip sense floating when not plugged in. Inverting jacks
|
|
short tip sense when unplugged and float when plugged in.
|
|
|
|
0 = (Default) Non-inverted
|
|
1 = Inverted
|
|
|
|
- cirrus,ts-dbnc-rise : Debounce the rising edge of TIP_SENSE_PLUG. With no
|
|
debounce, the tip sense pin might be noisy on a plug event.
|
|
|
|
0 - 0ms,
|
|
1 - 125ms,
|
|
2 - 250ms,
|
|
3 - 500ms,
|
|
4 - 750ms,
|
|
5 - (Default) 1s,
|
|
6 - 1.25s,
|
|
7 - 1.5s,
|
|
|
|
- cirrus,ts-dbnc-fall : Debounce the falling edge of TIP_SENSE_UNPLUG.
|
|
With no debounce, the tip sense pin might be noisy on an unplug event.
|
|
|
|
0 - 0ms,
|
|
1 - 125ms,
|
|
2 - 250ms,
|
|
3 - 500ms,
|
|
4 - 750ms,
|
|
5 - (Default) 1s,
|
|
6 - 1.25s,
|
|
7 - 1.5s,
|
|
|
|
- cirrus,btn-det-init-dbnce : This sets how long the driver sleeps after
|
|
enabling button detection interrupts. After auto-detection and before
|
|
servicing button interrupts, the HS bias needs time to settle. If you
|
|
don't wait, there is possibility for erroneous button interrupt.
|
|
|
|
0ms - 200ms,
|
|
Default = 100ms
|
|
|
|
- cirrus,btn-det-event-dbnce : This sets how long the driver delays after
|
|
receiving a button press interrupt. With level detect interrupts, you want
|
|
to wait a small amount of time to make sure the button press is making a
|
|
clean connection with the bias resistors.
|
|
|
|
0ms - 20ms,
|
|
Default = 10ms
|
|
|
|
- cirrus,bias-lvls : For a level-detect headset button scheme, each button
|
|
will bias the mic pin to a certain voltage. To determine which button was
|
|
pressed, the driver will compare this biased voltage to sequential,
|
|
decreasing voltages and will stop when a comparator is tripped,
|
|
indicating a comparator voltage < bias voltage. This value represents a
|
|
percentage of the internally generated HS bias voltage. For different
|
|
hardware setups, a designer might want to tweak this. This is an array of
|
|
descending values for the comparator voltage.
|
|
|
|
Array of 4 values
|
|
Each 0-63
|
|
< x1 x2 x3 x4 >
|
|
Default = < 15 8 4 1>
|
|
|
|
|
|
Example:
|
|
|
|
cs42l42: cs42l42@48 {
|
|
compatible = "cirrus,cs42l42";
|
|
reg = <0x48>;
|
|
VA-supply = <&dummy_vreg>;
|
|
VP-supply = <&dummy_vreg>;
|
|
VCP-supply = <&dummy_vreg>;
|
|
VD_FILT-supply = <&dummy_vreg>;
|
|
VL-supply = <&dummy_vreg>;
|
|
|
|
reset-gpios = <&axi_gpio_0 1 0>;
|
|
interrupt-parent = <&gpio0>;
|
|
interrupts = <55 8>
|
|
|
|
cirrus,ts-inv = <0x00>;
|
|
cirrus,ts-dbnc-rise = <0x05>;
|
|
cirrus,ts-dbnc-fall = <0x00>;
|
|
cirrus,btn-det-init-dbnce = <100>;
|
|
cirrus,btn-det-event-dbnce = <10>;
|
|
cirrus,bias-lvls = <0x0F 0x08 0x04 0x01>;
|
|
cirrus,hs-bias-ramp-rate = <0x02>;
|
|
};
|