Unverified Commit b5f34841 authored by Herve Codina's avatar Herve Codina Committed by Mark Brown
Browse files

ASoC: dt-bindings: simple-card: Add additional-devs subnode 



The additional-devs subnode allows to declared some virtual devices
as sound card children.
These virtual devices can then be used by the sound card and so be
present in the audio path.

The first virtual device supported is the audio IIO auxiliary device
in order to support an IIO device as an audio auxiliary device.

Signed-off-by: default avatarHerve Codina <herve.codina@bootlin.com>
Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: default avatarChristophe Leroy <christophe.leroy@©sgroup.eu>
Reviewed-by: default avatarChristophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20230623085830.749991-3-herve.codina@bootlin.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent cacff5e8

Documentation/devicetree/bindings/sound/simple-card.yaml

+53 −0
Original line number Diff line number Diff line
@@ -148,6 +148,15 @@ definitions: 
    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:
@@ -187,6 +196,8 @@ properties: 
    $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:
@@ -359,6 +370,48 @@ examples: 
        };

    };



# --------------------

# 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 = <&amp_in>, <&amp_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

# --------------------