# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/cirrus,cs42l42.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Cirrus Logic CS42L42 audio CODEC
maintainers:
- patches@opensource.cirrus.com
description:
The CS42L42 is a low-power audio codec designed for portable applications.
It provides a high-dynamic range, stereo DAC for audio playback and a mono
high-dynamic-range ADC for audio capture. There is an integrated headset
detection block.
properties:
compatible:
enum:
- cirrus,cs42l42
- cirrus,cs42l83
reg:
description:
The I2C address of the CS42L42.
maxItems: 1
VP-supply:
description:
VP power supply.
VCP-supply:
description:
Charge pump power supply.
VD_FILT-supply:
description:
FILT+ power supply.
VL-supply:
description:
Logic power supply.
VA-supply:
description:
Analog power supply.
reset-gpios:
description:
This pin will be asserted and then deasserted to reset the
CS42L42 before communication starts.
maxItems: 1
interrupts:
description:
Interrupt for CS42L42 IRQ line.
maxItems: 1
cirrus,ts-inv:
description: |
Sets the behaviour of the jack plug detect switch.
0 - (Default) Shorted to tip when unplugged, open when plugged.
This is "inverted tip sense (ITS)" in the datasheet.
1 - Open when unplugged, shorted to tip when plugged.
This is "normal tip sense (TS)" in the datasheet.
The CS42L42_TS_INV_* defines are available for this.
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 1
cirrus,ts-dbnc-rise:
description: |
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 - 1s (Default)
6 - 1.25s
7 - 1.5s
The CS42L42_TS_DBNCE_* defines are available for this.
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 7
cirrus,ts-dbnc-fall:
description: |
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 - 1s (Default)
6 - 1.25s
7 - 1.5s
The CS42L42_TS_DBNCE_* defines are available for this.
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 7
cirrus,btn-det-init-dbnce:
description: |
This sets how long to wait after enabling button detection
interrupts before servicing button interrupts, to allow the
HS bias time to settle. Value is in milliseconds.
There may be erroneous button interrupts if this debounce time
is too short.
0ms - 200ms,
Default = 100ms
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 200
cirrus,btn-det-event-dbnce:
description: |
This sets how long to wait after receiving a button press
interrupt before processing it. Allows time for the button
press to make a clean connection with the bias resistors.
Value is in milliseconds.
0ms - 20ms,
Default = 10ms
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 20
cirrus,bias-lvls:
description: |
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 voltage is compared to sequential, decreasing
voltages, until the compared voltage < bias voltage.
For different hardware setups, a designer might want to tweak this.
This is an array of descending values for the comparator voltage,
given as percent of the HSBIAS voltage.
Array of 4 values, each 0-63
< x1 x2 x3 x4 >
Default = < 15 8 4 1 >
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems: 4
maxItems: 4
items:
minimum: 0
maximum: 63
cirrus,hs-bias-ramp-rate:
description: |
If present this sets the rate that the HS bias should rise and fall.
The actual rise and fall times depend on external hardware (the
datasheet gives several rise and fall time examples).
0 - Fast rise time; slow, load-dependent fall time
1 - Fast
2 - Slow (default)
3 - Slowest
The CS42L42_HSBIAS_RAMP_* defines are available for this.
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 3
cirrus,hs-bias-sense-disable:
description: |
If present the HSBIAS sense is disabled. Configures HSBIAS output
current sense through the external 2.21-k resistor. HSBIAS_SENSE
is a hardware feature to reduce the potential pop noise when the
headset plug is removed slowly. But on some platforms ESD voltage
will affect it causing plug detection to fail, especially with CTIA
headset type. For different hardware setups, a designer might want
to tweak default behavior.
type: boolean
required:
- compatible
- reg
- VP-supply
- VCP-supply
- VD_FILT-supply
- VL-supply
- VA-supply
additionalProperties: false
examples:
- |
#include <dt-bindings/sound/cs42l42.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
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 = <CS42L42_TS_INV_DIS>;
cirrus,ts-dbnc-rise = <CS42L42_TS_DBNCE_1000>;
cirrus,ts-dbnc-fall = <CS42L42_TS_DBNCE_0>;
cirrus,btn-det-init-dbnce = <100>;
cirrus,btn-det-event-dbnce = <10>;
cirrus,bias-lvls = <0x0F 0x08 0x04 0x01>;
cirrus,hs-bias-ramp-rate = <CS42L42_HSBIAS_RAMP_SLOW>;
};
};
