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HSBIAS_SENSE_EN 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. Signed-off-by: Vitaly Rodionov <vitalyr@opensource.cirrus.com> Link: https://lore.kernel.org/r/20210511145220.125760-1-vitalyr@opensource.cirrus.com Signed-off-by: Mark Brown <broonie@kernel.org>
115 lines
3.7 KiB
Plaintext
115 lines
3.7 KiB
Plaintext
CS42L42 audio CODEC
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Required properties:
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- compatible : "cirrus,cs42l42"
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- reg : the I2C address of the device for I2C.
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- VP-supply, VCP-supply, VD_FILT-supply, VL-supply, VA-supply :
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power supplies for the device, as covered in
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Documentation/devicetree/bindings/regulator/regulator.txt.
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Optional properties:
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- reset-gpios : a GPIO spec for the reset pin. If specified, it will be
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deasserted before communication to the codec starts.
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- interrupts : IRQ line info CS42L42.
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(See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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for further information relating to interrupt properties)
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- cirrus,ts-inv : Boolean property. For jacks that invert the tip sense
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polarity. Normal jacks will short tip sense pin to HS1 when headphones are
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plugged in and leave tip sense floating when not plugged in. Inverting jacks
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short tip sense when unplugged and float when plugged in.
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0 = (Default) Non-inverted
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1 = Inverted
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- cirrus,ts-dbnc-rise : Debounce the rising edge of TIP_SENSE_PLUG. With no
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debounce, the tip sense pin might be noisy on a plug event.
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0 - 0ms,
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1 - 125ms,
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2 - 250ms,
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3 - 500ms,
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4 - 750ms,
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5 - (Default) 1s,
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6 - 1.25s,
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7 - 1.5s,
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- cirrus,ts-dbnc-fall : Debounce the falling edge of TIP_SENSE_UNPLUG.
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With no debounce, the tip sense pin might be noisy on an unplug event.
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0 - 0ms,
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1 - 125ms,
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2 - 250ms,
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3 - 500ms,
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4 - 750ms,
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5 - (Default) 1s,
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6 - 1.25s,
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7 - 1.5s,
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- cirrus,btn-det-init-dbnce : This sets how long the driver sleeps after
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enabling button detection interrupts. After auto-detection and before
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servicing button interrupts, the HS bias needs time to settle. If you
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don't wait, there is possibility for erroneous button interrupt.
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0ms - 200ms,
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Default = 100ms
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- cirrus,btn-det-event-dbnce : This sets how long the driver delays after
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receiving a button press interrupt. With level detect interrupts, you want
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to wait a small amount of time to make sure the button press is making a
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clean connection with the bias resistors.
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0ms - 20ms,
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Default = 10ms
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- cirrus,bias-lvls : For a level-detect headset button scheme, each button
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will bias the mic pin to a certain voltage. To determine which button was
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pressed, the driver will compare this biased voltage to sequential,
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decreasing voltages and will stop when a comparator is tripped,
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indicating a comparator voltage < bias voltage. This value represents a
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percentage of the internally generated HS bias voltage. For different
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hardware setups, a designer might want to tweak this. This is an array of
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descending values for the comparator voltage.
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Array of 4 values
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Each 0-63
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< x1 x2 x3 x4 >
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Default = < 15 8 4 1>
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- cirrus,hs-bias-sense-disable: This is boolean property. If present the
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HSBIAS sense is disabled. Configures HSBIAS output current sense through
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the external 2.21-k resistor. HSBIAS_SENSE is hardware feature to reduce
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the potential pop noise during the headset plug out slowly. But on some
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platforms ESD voltage will affect it causing test to fail, especially
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with CTIA headset type. For different hardware setups, a designer might
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want to tweak default behavior.
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Example:
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cs42l42: cs42l42@48 {
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compatible = "cirrus,cs42l42";
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reg = <0x48>;
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VA-supply = <&dummy_vreg>;
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VP-supply = <&dummy_vreg>;
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VCP-supply = <&dummy_vreg>;
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VD_FILT-supply = <&dummy_vreg>;
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VL-supply = <&dummy_vreg>;
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reset-gpios = <&axi_gpio_0 1 0>;
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interrupt-parent = <&gpio0>;
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interrupts = <55 8>
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cirrus,ts-inv = <0x00>;
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cirrus,ts-dbnc-rise = <0x05>;
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cirrus,ts-dbnc-fall = <0x00>;
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cirrus,btn-det-init-dbnce = <100>;
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cirrus,btn-det-event-dbnce = <10>;
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cirrus,bias-lvls = <0x0F 0x08 0x04 0x01>;
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cirrus,hs-bias-ramp-rate = <0x02>;
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};
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