[PATCH v3 4/6] dt-bindings: sound: Add support for the Lantiq PEF2256 codec

Herve Codina
2023-03-22T13:47:37Z

The Lantiq PEF2256 is a framer and line interface component designed to
fulfill all required interfacing between an analog E1/T1/J1 line and the
digital PCM system highway/H.100 bus.

The codec support allows to use some of the PCM system highway
time-slots as audio channels to transport audio data over the E1/T1/J1
lines.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
.../bindings/sound/lantiq,pef2256-codec.yaml | 54 +++++++++++++++++++
1 file changed, 54 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/lantiq,pef2256-codec.yaml

diff --git a/Documentation/devicetree/bindings/sound/lantiq,pef2256-codec.yaml b/Documentation/devicetree/bindings/sound/lantiq,pef2256-codec.yaml
new file mode 100644
index 000000000000..da35b70cda99
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/lantiq,pef2256-codec.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/lantiq,pef2256-codec.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Lantiq PEF2256 codec
+
+maintainers:
+ - Herve Codina <herve.codina@bootlin.com>
+
+description: |
+ Codec support for PEF2256.
+
+ The Lantiq PEF2256, also known as Infineon PEF2256 or FALC56, is a framer and
+ line interface component designed to fulfill all required interfacing between
+ an analog E1/T1/J1 line and the digital PCM system highway/H.100 bus.
+
+ The codec support allows to use some of the PCM system highway time-slots as
+ audio channels to transport audio data over the E1/T1/J1 lines.
+
+ The time-slots used by the codec must be set and so, the properties
+ 'dai-tdm-slot-num', 'dai-tdm-slot-width', 'dai-tdm-slot-tx-mask' and
+ 'dai-tdm-slot-rx-mask' must be present in the ALSA sound card node for
+ sub-nodes that involve the codec. The codec uses 8bit time-slots.
+ 'dai-tdm-tdm-slot-with' must be set to 8.
+ The tx and rx masks define the PEF2256 time-slots assigned to the codec.
+
+ The PEF2256 codec node should be a child of a PEF2256 node.
+ Refer to the bindings described in
+ Documentation/devicetree/bindings/mfd/lantiq,pef2256.yaml
+
+allOf:
+ - $ref: dai-common.yaml#
+
+properties:
+ compatible:
+ const: lantiq,pef2256-codec
+
+ '#sound-dai-cells':
+ const: 0
+
+required:
+ - compatible
+ - '#sound-dai-cells'
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ codec {
+ compatible = "lantiq,pef2256-codec";
+ #sound-dai-cells = <0>;
+ };
--
2.39.2