[PATCH 1/4] dt-bindings: sound: Add simple-iio-aux

Herve Codina
2023-04-21T12:42:27Z

Industrial I/O devices can be present in the audio path.
These devices needs to be viewed as audio components in order to be
fully integrated in the audio path.

simple-iio-aux allows to consider these Industrial I/O devices as
auxliary audio devices.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
.../bindings/sound/simple-iio-aux.yaml | 65 +++++++++++++++++++
1 file changed, 65 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/simple-iio-aux.yaml

diff --git a/Documentation/devicetree/bindings/sound/simple-iio-aux.yaml b/Documentation/devicetree/bindings/sound/simple-iio-aux.yaml
new file mode 100644
index 000000000000..fab128fce4fc
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/simple-iio-aux.yaml
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/simple-iio-aux.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Simple IIO auxiliary
+
+maintainers:
+ - Herve Codina <herve.codina@bootlin.com>
+
+description: |
+ Auxiliary device based on Industrial I/O device channels
+
+allOf:
+ - $ref: /schemas/iio/iio-consumer.yaml
+ - $ref: dai-common.yaml#
+
+properties:
+ compatible:
+ const: simple-iio-aux
+
+ io-channels:
+ description:
+ Industrial I/O device channels used
+
+ io-channel-names:
+ description:
+ Industrial I/O channel names related to io-channels.
+ These names are used to provides sound controls, widgets and routes names.
+
+ invert:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description: |
+ A list of 0/1 flags defining whether or not the related channel is
+ inverted
+ items:
+ enum: [0, 1]
+ default: 0
+ description: |
+ Invert the sound control value compared to the IIO channel raw value.
+ - 1: The related sound control value is inverted meaning that the
+ minimum sound control value correspond to the maximum IIO channel
+ raw value and the maximum sound control value correspond to the
+ minimum IIO channel raw value.
+ - 0: The related sound control value is not inverted meaning that the
+ minimum (resp maximum) sound control value correspond to the
+ minimum (resp maximum) IIO channel raw value.
+
+required:
+ - compatible
+ - io-channels
+ - io-channel-names
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ aux {
+ compatible = "simple-iio-aux";
+ io-channels = <&iio 0>, <&iio 1>, <&iio 2>, <&iio 3>;
+ io-channel-names = "CH0", "CH1", "CH2", "CH3";
+ /* Invert CH1 and CH2 */
+ invert = <0 1 1>;
+ };
--
2.39.2