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-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>
-
- - cirrus,hs-bias-sense-disable: This is boolean property. If present the
- HSBIAS sense is disabled. Configures HSBIAS output current sense through
- the external 2.21-k resistor. HSBIAS_SENSE is hardware feature to reduce
- the potential pop noise during the headset plug out slowly. But on some
- platforms ESD voltage will affect it causing test to fail, especially
- with CTIA headset type. For different hardware setups, a designer might
- want to tweak default behavior.
-
-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>;
-};