2023-08-30 17:31:07 +02:00
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/sound/cirrus,cs42l42.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Cirrus Logic CS42L42 audio CODEC
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maintainers:
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- patches@opensource.cirrus.com
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description:
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The CS42L42 is a low-power audio codec designed for portable applications.
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It provides a high-dynamic range, stereo DAC for audio playback and a mono
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high-dynamic-range ADC for audio capture. There is an integrated headset
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detection block.
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properties:
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compatible:
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enum:
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- cirrus,cs42l42
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- cirrus,cs42l83
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reg:
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description:
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The I2C address of the CS42L42.
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maxItems: 1
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VP-supply:
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description:
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VP power supply.
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VCP-supply:
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description:
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Charge pump power supply.
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VD_FILT-supply:
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description:
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FILT+ power supply.
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VL-supply:
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description:
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Logic power supply.
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VA-supply:
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description:
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Analog power supply.
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reset-gpios:
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description:
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This pin will be asserted and then deasserted to reset the
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CS42L42 before communication starts.
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maxItems: 1
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interrupts:
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description:
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Interrupt for CS42L42 IRQ line.
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maxItems: 1
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cirrus,ts-inv:
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description: |
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Sets the behaviour of the jack plug detect switch.
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0 - (Default) Shorted to tip when unplugged, open when plugged.
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This is "inverted tip sense (ITS)" in the datasheet.
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1 - Open when unplugged, shorted to tip when plugged.
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This is "normal tip sense (TS)" in the datasheet.
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The CS42L42_TS_INV_* defines are available for this.
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2023-10-24 12:59:35 +02:00
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$ref: /schemas/types.yaml#/definitions/uint32
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2023-08-30 17:31:07 +02:00
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minimum: 0
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maximum: 1
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cirrus,ts-dbnc-rise:
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description: |
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Debounce the rising edge of TIP_SENSE_PLUG. With no
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debounce, the tip sense pin might be noisy on a plug event.
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0 - 0ms
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1 - 125ms
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2 - 250ms
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3 - 500ms
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4 - 750ms
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5 - 1s (Default)
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6 - 1.25s
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7 - 1.5s
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The CS42L42_TS_DBNCE_* defines are available for this.
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$ref: /schemas/types.yaml#/definitions/uint32
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minimum: 0
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maximum: 7
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cirrus,ts-dbnc-fall:
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description: |
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Debounce the falling edge of TIP_SENSE_UNPLUG. With no
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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 - 1s (Default)
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6 - 1.25s
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7 - 1.5s
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The CS42L42_TS_DBNCE_* defines are available for this.
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$ref: /schemas/types.yaml#/definitions/uint32
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minimum: 0
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maximum: 7
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cirrus,btn-det-init-dbnce:
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description: |
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This sets how long to wait after enabling button detection
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interrupts before servicing button interrupts, to allow the
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HS bias time to settle. Value is in milliseconds.
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There may be erroneous button interrupts if this debounce time
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is too short.
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0ms - 200ms,
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Default = 100ms
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$ref: /schemas/types.yaml#/definitions/uint32
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minimum: 0
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maximum: 200
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cirrus,btn-det-event-dbnce:
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description: |
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This sets how long to wait after receiving a button press
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interrupt before processing it. Allows time for the button
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press to make a clean connection with the bias resistors.
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Value is in milliseconds.
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0ms - 20ms,
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Default = 10ms
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$ref: /schemas/types.yaml#/definitions/uint32
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minimum: 0
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maximum: 20
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cirrus,bias-lvls:
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description: |
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For a level-detect headset button scheme, each button will bias
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the mic pin to a certain voltage. To determine which button was
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pressed, the voltage is compared to sequential, decreasing
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voltages, until the compared voltage < bias voltage.
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For different hardware setups, a designer might want to tweak this.
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This is an array of descending values for the comparator voltage,
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given as percent of the HSBIAS voltage.
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Array of 4 values, each 0-63
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< x1 x2 x3 x4 >
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Default = < 15 8 4 1 >
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$ref: /schemas/types.yaml#/definitions/uint32-array
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minItems: 4
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maxItems: 4
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items:
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minimum: 0
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maximum: 63
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cirrus,hs-bias-ramp-rate:
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description: |
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If present this sets the rate that the HS bias should rise and fall.
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The actual rise and fall times depend on external hardware (the
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datasheet gives several rise and fall time examples).
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0 - Fast rise time; slow, load-dependent fall time
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1 - Fast
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2 - Slow (default)
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3 - Slowest
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The CS42L42_HSBIAS_RAMP_* defines are available for this.
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$ref: /schemas/types.yaml#/definitions/uint32
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minimum: 0
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maximum: 3
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cirrus,hs-bias-sense-disable:
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description: |
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If present the HSBIAS sense is disabled. Configures HSBIAS output
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current sense through the external 2.21-k resistor. HSBIAS_SENSE
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is a hardware feature to reduce the potential pop noise when the
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headset plug is removed slowly. But on some platforms ESD voltage
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will affect it causing plug detection to fail, especially with CTIA
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headset type. For different hardware setups, a designer might want
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to tweak default behavior.
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type: boolean
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required:
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- compatible
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- reg
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- VP-supply
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- VCP-supply
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- VD_FILT-supply
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- VL-supply
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- VA-supply
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/sound/cs42l42.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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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 = <CS42L42_TS_INV_DIS>;
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cirrus,ts-dbnc-rise = <CS42L42_TS_DBNCE_1000>;
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cirrus,ts-dbnc-fall = <CS42L42_TS_DBNCE_0>;
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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 = <CS42L42_HSBIAS_RAMP_SLOW>;
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};
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};
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