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ASoC: dt-bindings: Add Cirrus Logic CS48L32 audio DSP

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The CS48L32 is an Audio DSP with microphone inputs and SPI
control interface. It has a programmable DSP and a variety of
power-efficient fixed-function audio processors, with configurable
digital mixing and routing.

Most properties are core properties: supply regulators, gpios, clocks,
interrupt parent and SPI interface. The custom properties define
the configuration of the microphone inputs to match what is physically
attached to them.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: "Rob Herring (Arm)" <robh@kernel.org>
Link: https://patch.msgid.link/20250415115016.505777-2-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Richard Fitzgerald
2025-04-15 12:50:15 +01:00
committed by Mark Brown
parent 8ffd015db8
commit ac03495d73
2 changed files with 215 additions and 0 deletions
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195
Documentation/devicetree/bindings/sound/cirrus,cs48l32.yaml Normal file
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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/cirrus,cs48l32.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Cirrus Logic CS48L32 audio DSP.
maintainers:
- patches@opensource.cirrus.com
description: |
The CS48L32 is a high-performance low-power audio DSP for smartphones and
other portable audio devices. The CS48L32 combines a programmable Halo Core
DSP with a variety of power-efficient fixed-function audio processors.
See also the binding headers:
include/dt-bindings/sound/cs48l32.yaml
allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
- $ref: dai-common.yaml#
properties:
compatible:
enum:
- cirrus,cs48l32
reg:
description: SPI chip-select number.
maxItems: 1
spi-max-frequency:
maximum: 25000000
vdd-a-supply:
description: Regulator supplying VDD_A
vdd-d-supply:
description: Regulator supplying VDD_D
vdd-io-supply:
description: Regulator supplying VDD_IO
vdd-cp-supply:
description: Regulator supplying VDD_CP
reset-gpios:
description:
One entry specifying the GPIO controlling /RESET. Although optional,
it is strongly recommended to use a hardware reset.
maxItems: 1
interrupts:
maxItems: 1
clocks:
items:
- description: The clock supplied on MCLK1
clock-names:
const: mclk1
'#sound-dai-cells':
const: 1
cirrus,in-type:
description: |
A list of input type settings for each ADC input.
Inputs are one of these types:
CS48L32_IN_TYPE_DIFF : analog differential (default)
CS48L32_IN_TYPE_SE : analog single-ended
The type of the left (L) and right (R) channel on each input is
independently configured, as are the two groups of pins muxable to
the input (referred to in the datasheet as "1" and "2").
$ref: /schemas/types.yaml#/definitions/uint32-array
items:
- description:
IN1L_1 analog input type. One of the CS48L32_IN_TYPE_xxx.
minimum: 0
maximum: 1
default: 0
- description:
IN1R_1 analog input type. One of the CS48L32_IN_TYPE_xxx.
minimum: 0
maximum: 1
default: 0
- description:
IN1L_2 analog input type. One of the CS48L32_IN_TYPE_xxx.
minimum: 0
maximum: 1
default: 0
- description:
IN1R_2 analog input type. One of the CS48L32_IN_TYPE_xxx.
minimum: 0
maximum: 1
default: 0
cirrus,pdm-sup:
description: |
Indicate which MICBIAS output supplies bias to the microphone.
There is one cell per input (IN1, IN2, ...).
One of the CS48L32_MICBIAS_xxx values.
CS48L32_PDM_SUP_VOUT_MIC : mic biased from VOUT_MIC
CS48L32_PDM_SUP_MICBIAS1 : mic biased from MICBIAS1
Also see the INn_PDM_SUP field in the datasheet.
$ref: /schemas/types.yaml#/definitions/uint32-array
items:
- description: IN1 PDM supply source
minimum: 0
maximum: 1
default: 0
- description: IN2 PDM supply source
minimum: 0
maximum: 1
default: 0
required:
- compatible
- reg
- vdd-a-supply
- vdd-d-supply
- vdd-io-supply
- vdd-cp-supply
additionalProperties: false
examples:
- |
#include <dt-bindings/sound/cs48l32.h>
spi@e0006000 {
#address-cells = <1>;
#size-cells = <0>;
reg = <0xe0006000 0x1000>;
codec@1 {
compatible = "cirrus,cs48l32";
reg = <0x1>;
spi-max-frequency = <2500000>;
vdd-a-supply = <&regulator_1v8>;
vdd-d-supply = <&regulator_1v2>;
vdd-io-supply = <&regulator_1v8>;
vdd-cp-supply = <&regulator_1v8>;
reset-gpios = <&gpio 0 0>;
clocks = <&clks 0>;
clock-names = "mclk1";
interrupt-parent = <&gpio0>;
interrupts = <56 8>;
#sound-dai-cells = <1>;
cirrus,in-type = <
CS48L32_IN_TYPE_DIFF CS48L32_IN_TYPE_DIFF
CS48L32_IN_TYPE_SE CS48L32_IN_TYPE_SE
>;
cirrus,pdm-sup = <
CS48L32_PDM_SUP_MICBIAS1 CS48L32_PDM_SUP_MICBIAS1
>;
};
};
#
# Minimal config
#
- |
#include <dt-bindings/sound/cs48l32.h>
spi@e0006000 {
#address-cells = <1>;
#size-cells = <0>;
reg = <0xe0006000 0x1000>;
codec@1 {
compatible = "cirrus,cs48l32";
reg = <0x1>;
vdd-a-supply = <&regulator_1v8>;
vdd-d-supply = <&regulator_1v2>;
vdd-io-supply = <&regulator_1v8>;
vdd-cp-supply = <&regulator_1v8>;
};
};

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include/dt-bindings/sound/cs48l32.h Normal file
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/* SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause */
/*
* Device Tree defines for CS48L32 DSP.
*
* Copyright (C) 2016-2018, 2022, 2025 Cirrus Logic, Inc. and
* Cirrus Logic International Semiconductor Ltd.
*/
#ifndef DT_BINDINGS_SOUND_CS48L32_H
#define DT_BINDINGS_SOUND_CS48L32_H
/* Values for cirrus,in-type */
#define CS48L32_IN_TYPE_DIFF 0
#define CS48L32_IN_TYPE_SE 1
/* Values for cirrus,pdm-sup */
#define CS48L32_PDM_SUP_VOUT_MIC 0
#define CS48L32_PDM_SUP_MICBIAS1 1
#endif