# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/simple-card.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Simple Audio Card Driver
maintainers:
- Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
definitions:
frame-master:
description: Indicates dai-link frame master.
$ref: /schemas/types.yaml#/definitions/phandle
bitclock-master:
description: Indicates dai-link bit clock master
$ref: /schemas/types.yaml#/definitions/phandle
frame-inversion:
description: dai-link uses frame clock inversion
$ref: /schemas/types.yaml#/definitions/flag
bitclock-inversion:
description: dai-link uses bit clock inversion
$ref: /schemas/types.yaml#/definitions/flag
dai-tdm-slot-num:
description: see tdm-slot.txt.
$ref: /schemas/types.yaml#/definitions/uint32
dai-tdm-slot-width:
description: see tdm-slot.txt.
$ref: /schemas/types.yaml#/definitions/uint32
system-clock-frequency:
description: |
If a clock is specified and a multiplication factor is given with
mclk-fs, the clock will be set to the calculated mclk frequency
when the stream starts.
$ref: /schemas/types.yaml#/definitions/uint32
system-clock-direction-out:
description: |
specifies clock direction as 'out' on initialization.
It is useful for some aCPUs with fixed clocks.
$ref: /schemas/types.yaml#/definitions/flag
system-clock-fixed:
description: |
Specifies that the clock frequency should not be modified.
Implied when system-clock-frequency is specified, but can be used when
a clock is mapped to the device whose frequency cannot or should not be
changed. When mclk-fs is also specified, this restricts the device to a
single fixed sampling rate.
$ref: /schemas/types.yaml#/definitions/flag
mclk-fs:
description: |
Multiplication factor between stream rate and codec mclk.
When defined, mclk-fs property defined in dai-link sub nodes are ignored.
$ref: /schemas/types.yaml#/definitions/uint32
aux-devs:
description: |
List of phandles pointing to auxiliary devices, such
as amplifiers, to be added to the sound card.
$ref: /schemas/types.yaml#/definitions/phandle-array
convert-rate:
description: CPU to Codec rate convert.
$ref: /schemas/types.yaml#/definitions/uint32
convert-channels:
description: CPU to Codec rate channels.
$ref: /schemas/types.yaml#/definitions/uint32
prefix:
description: device name prefix
$ref: /schemas/types.yaml#/definitions/string
label:
maxItems: 1
routing:
description: |
A list of the connections between audio components.
Each entry is a pair of strings, the first being the
connection's sink, the second being the connection's source.
$ref: /schemas/types.yaml#/definitions/non-unique-string-array
widgets:
description: User specified audio sound widgets.
$ref: /schemas/types.yaml#/definitions/non-unique-string-array
pin-switches:
description: the widget names for which pin switches must be created.
$ref: /schemas/types.yaml#/definitions/string-array
format:
description: audio format.
items:
enum:
- i2s
- right_j
- left_j
- dsp_a
- dsp_b
- ac97
- pdm
- msb
- lsb
dai:
type: object
properties:
sound-dai:
maxItems: 1
# common properties
mclk-fs:
$ref: "#/definitions/mclk-fs"
prefix:
$ref: "#/definitions/prefix"
frame-inversion:
$ref: "#/definitions/frame-inversion"
bitclock-inversion:
$ref: "#/definitions/bitclock-inversion"
frame-master:
$ref: /schemas/types.yaml#/definitions/flag
bitclock-master:
$ref: /schemas/types.yaml#/definitions/flag
dai-tdm-slot-num:
$ref: "#/definitions/dai-tdm-slot-num"
dai-tdm-slot-width:
$ref: "#/definitions/dai-tdm-slot-width"
clocks:
maxItems: 1
system-clock-frequency:
$ref: "#/definitions/system-clock-frequency"
system-clock-direction-out:
$ref: "#/definitions/system-clock-direction-out"
system-clock-fixed:
$ref: "#/definitions/system-clock-fixed"
required:
- sound-dai
additional-devs:
type: object
description:
Additional devices used by the simple audio card.
patternProperties:
'^iio-aux(-.+)?$':
type: object
$ref: audio-iio-aux.yaml#
properties:
compatible:
contains:
enum:
- simple-audio-card
- simple-scu-audio-card
"#address-cells":
const: 1
"#size-cells":
const: 0
label:
$ref: "#/definitions/label"
simple-audio-card,name:
description: User specified audio sound card name.
$ref: /schemas/types.yaml#/definitions/string
simple-audio-card,widgets:
$ref: "#/definitions/widgets"
simple-audio-card,routing:
$ref: "#/definitions/routing"
# common properties
simple-audio-card,frame-master:
$ref: "#/definitions/frame-master"
simple-audio-card,bitclock-master:
$ref: "#/definitions/bitclock-master"
simple-audio-card,frame-inversion:
$ref: "#/definitions/frame-inversion"
simple-audio-card,bitclock-inversion:
$ref: "#/definitions/bitclock-inversion"
simple-audio-card,format:
$ref: "#/definitions/format"
simple-audio-card,mclk-fs:
$ref: "#/definitions/mclk-fs"
simple-audio-card,aux-devs:
$ref: "#/definitions/aux-devs"
simple-audio-card,additional-devs:
$ref: "#/definitions/additional-devs"
simple-audio-card,convert-rate:
$ref: "#/definitions/convert-rate"
simple-audio-card,convert-channels:
$ref: "#/definitions/convert-channels"
simple-audio-card,prefix:
$ref: "#/definitions/prefix"
simple-audio-card,pin-switches:
$ref: "#/definitions/pin-switches"
simple-audio-card,hp-det-gpio:
maxItems: 1
simple-audio-card,mic-det-gpio:
maxItems: 1
patternProperties:
"^simple-audio-card,cpu(@[0-9a-f]+)?$":
$ref: "#/definitions/dai"
"^simple-audio-card,codec(@[0-9a-f]+)?$":
$ref: "#/definitions/dai"
"^simple-audio-card,plat(@[0-9a-f]+)?$":
$ref: "#/definitions/dai"
"^simple-audio-card,dai-link(@[0-9a-f]+)?$":
description: |
Container for dai-link level properties and the CPU and CODEC sub-nodes.
This container may be omitted when the card has only one DAI link.
type: object
properties:
reg:
maxItems: 1
"#address-cells":
const: 1
"#size-cells":
const: 0
# common properties
frame-master:
$ref: "#/definitions/frame-master"
bitclock-master:
$ref: "#/definitions/bitclock-master"
frame-inversion:
$ref: "#/definitions/frame-inversion"
bitclock-inversion:
$ref: "#/definitions/bitclock-inversion"
format:
$ref: "#/definitions/format"
mclk-fs:
$ref: "#/definitions/mclk-fs"
aux-devs:
$ref: "#/definitions/aux-devs"
convert-rate:
$ref: "#/definitions/convert-rate"
convert-channels:
$ref: "#/definitions/convert-channels"
prefix:
$ref: "#/definitions/prefix"
pin-switches:
$ref: "#/definitions/pin-switches"
hp-det-gpio:
maxItems: 1
mic-det-gpio:
maxItems: 1
patternProperties:
"^cpu(-[0-9]+)?$":
$ref: "#/definitions/dai"
"^codec(-[0-9]+)?$":
$ref: "#/definitions/dai"
additionalProperties: false
required:
- compatible
additionalProperties: false
examples:
# --------------------
# single DAI link
# --------------------
- |
sound {
compatible = "simple-audio-card";
simple-audio-card,name = "VF610-Tower-Sound-Card";
simple-audio-card,format = "left_j";
simple-audio-card,bitclock-master = <&dailink0_master>;
simple-audio-card,frame-master = <&dailink0_master>;
simple-audio-card,widgets =
"Microphone", "Microphone Jack",
"Headphone", "Headphone Jack",
"Speaker", "External Speaker";
simple-audio-card,routing =
"MIC_IN", "Microphone Jack",
"Headphone Jack", "HP_OUT",
"External Speaker", "LINE_OUT";
simple-audio-card,cpu {
sound-dai = <&sh_fsi2 0>;
};
dailink0_master: simple-audio-card,codec {
sound-dai = <&ak4648>;
clocks = <&osc>;
};
};
# --------------------
# Multi DAI links
# --------------------
- |
sound {
compatible = "simple-audio-card";
simple-audio-card,name = "Cubox Audio";
#address-cells = <1>;
#size-cells = <0>;
simple-audio-card,dai-link@0 { /* I2S - HDMI */
reg = <0>;
format = "i2s";
cpu {
sound-dai = <&audio0>;
};
codec {
sound-dai = <&tda998x0>;
};
};
simple-audio-card,dai-link@1 { /* S/PDIF - HDMI */
reg = <1>;
cpu {
sound-dai = <&audio1>;
};
codec {
sound-dai = <&tda998x1>;
};
};
simple-audio-card,dai-link@2 { /* S/PDIF - S/PDIF */
reg = <2>;
cpu {
sound-dai = <&audio2>;
};
codec {
sound-dai = <&spdif_codec>;
};
};
};
# --------------------
# route audio from IMX6 SSI2 through TLV320DAC3100 codec
# through TPA6130A2 amplifier to headphones:
# --------------------
- |
sound {
compatible = "simple-audio-card";
simple-audio-card,widgets =
"Headphone", "Headphone Jack";
simple-audio-card,routing =
"Headphone Jack", "HPLEFT",
"Headphone Jack", "HPRIGHT",
"LEFTIN", "HPL",
"RIGHTIN", "HPR";
simple-audio-card,aux-devs = <&>;
simple-audio-card,cpu {
sound-dai = <&ssi2>;
};
simple-audio-card,codec {
sound-dai = <&codec>;
clocks = <&clocks>;
};
};
# --------------------
# route audio to/from a codec through an amplifier
# designed with a potentiometer driven by IIO:
# --------------------
- |
sound {
compatible = "simple-audio-card";
simple-audio-card,aux-devs = <&_in>, <&_out>;
simple-audio-card,routing =
"CODEC LEFTIN", "AMP_IN LEFT OUT",
"CODEC RIGHTIN", "AMP_IN RIGHT OUT",
"AMP_OUT LEFT IN", "CODEC LEFTOUT",
"AMP_OUT RIGHT IN", "CODEC RIGHTOUT";
simple-audio-card,additional-devs {
amp_out: iio-aux-out {
compatible = "audio-iio-aux";
io-channels = <&pot_out 0>, <&pot_out 1>;
io-channel-names = "LEFT", "RIGHT";
snd-control-invert-range = <1 1>;
sound-name-prefix = "AMP_OUT";
};
amp_in: iio_aux-in {
compatible = "audio-iio-aux";
io-channels = <&pot_in 0>, <&pot_in 1>;
io-channel-names = "LEFT", "RIGHT";
sound-name-prefix = "AMP_IN";
};
};
simple-audio-card,cpu {
sound-dai = <&cpu>;
};
simple-audio-card,codec {
sound-dai = <&codec>;
clocks = <&clocks>;
};
};
# --------------------
# Sampling Rate Conversion
# --------------------
- |
sound {
compatible = "simple-audio-card";
simple-audio-card,name = "rsnd-ak4643";
simple-audio-card,format = "left_j";
simple-audio-card,bitclock-master = <&sndcodec>;
simple-audio-card,frame-master = <&sndcodec>;
simple-audio-card,convert-rate = <48000>;
simple-audio-card,prefix = "ak4642";
simple-audio-card,routing = "ak4642 Playback", "DAI0 Playback",
"DAI0 Capture", "ak4642 Capture";
sndcpu: simple-audio-card,cpu {
sound-dai = <&rcar_sound>;
};
sndcodec: simple-audio-card,codec {
sound-dai = <&ak4643>;
system-clock-frequency = <11289600>;
};
};
# --------------------
# 2 CPU 1 Codec (Mixing)
# --------------------
- |
sound {
compatible = "simple-audio-card";
#address-cells = <1>;
#size-cells = <0>;
simple-audio-card,name = "rsnd-ak4643";
simple-audio-card,format = "left_j";
simple-audio-card,bitclock-master = <&dpcmcpu>;
simple-audio-card,frame-master = <&dpcmcpu>;
simple-audio-card,convert-rate = <48000>;
simple-audio-card,convert-channels = <2>;
simple-audio-card,routing = "ak4642 Playback", "DAI0 Playback",
"ak4642 Playback", "DAI1 Playback";
dpcmcpu: simple-audio-card,cpu@0 {
reg = <0>;
sound-dai = <&rcar_sound 0>;
};
simple-audio-card,cpu@1 {
reg = <1>;
sound-dai = <&rcar_sound 1>;
};
simple-audio-card,codec {
prefix = "ak4642";
sound-dai = <&ak4643>;
clocks = <&audio_clock>;
};
};
# --------------------
# Multi DAI links with DPCM:
#
# CPU0 ------ ak4613
# CPU1 ------ PCM3168A-p /* DPCM 1ch/2ch */
# CPU2 --/ /* DPCM 3ch/4ch */
# CPU3 --/ /* DPCM 5ch/6ch */
# CPU4 --/ /* DPCM 7ch/8ch */
# CPU5 ------ PCM3168A-c
# --------------------
- |
sound {
compatible = "simple-audio-card";
#address-cells = <1>;
#size-cells = <0>;
simple-audio-card,routing =
"pcm3168a Playback", "DAI1 Playback",
"pcm3168a Playback", "DAI2 Playback",
"pcm3168a Playback", "DAI3 Playback",
"pcm3168a Playback", "DAI4 Playback";
simple-audio-card,dai-link@0 {
reg = <0>;
format = "left_j";
bitclock-master = <&sndcpu0>;
frame-master = <&sndcpu0>;
sndcpu0: cpu {
sound-dai = <&rcar_sound 0>;
};
codec {
sound-dai = <&ak4613>;
};
};
simple-audio-card,dai-link@1 {
reg = <1>;
format = "i2s";
bitclock-master = <&sndcpu1>;
frame-master = <&sndcpu1>;
convert-channels = <8>; /* TDM Split */
sndcpu1: cpu-0 {
sound-dai = <&rcar_sound 1>;
};
cpu-1 {
sound-dai = <&rcar_sound 2>;
};
cpu-2 {
sound-dai = <&rcar_sound 3>;
};
cpu-3 {
sound-dai = <&rcar_sound 4>;
};
codec {
mclk-fs = <512>;
prefix = "pcm3168a";
dai-tdm-slot-num = <8>;
sound-dai = <&pcm3168a 0>;
};
};
simple-audio-card,dai-link@2 {
reg = <2>;
format = "i2s";
bitclock-master = <&sndcpu2>;
frame-master = <&sndcpu2>;
sndcpu2: cpu {
sound-dai = <&rcar_sound 5>;
};
codec {
mclk-fs = <512>;
prefix = "pcm3168a";
sound-dai = <&pcm3168a 1>;
};
};
};