[PATCH] dt-bindings: sound: add toshiba,apb-dummy-codec binding

["Pablo D. Bergamasco" <danpablo@gmail.com>]

Add device tree binding documentation for the Toshiba APBridge
dummy ALSA SoC codec used in the Greybus audio framework.

Fixes the following checkpatch warning:
  WARNING: DT compatible string appears un-documented

Signed-off-by: Pablo D. Bergamasco <danpablo@gmail.com>
---
 .../sound/toshiba,apb-dummy-codec.yaml        | 33 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/toshiba,apb-dummy-codec.yaml

diff --git a/Documentation/devicetree/bindings/sound/toshiba,apb-dummy-codec.yaml b/Documentation/devicetree/bindings/sound/toshiba,apb-dummy-codec.yaml
new file mode 100644
index 000000000000..e0542feeb980
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/toshiba,apb-dummy-codec.yaml
@@ -0,0 +1,33 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/toshiba,apb-dummy-codec.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Toshiba APBridge Dummy ALSA SoC Codec
+
+maintainers:
+  - Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
+
+description:
+  The APBridge dummy codec is part of the Greybus audio framework,
+  used in Project Ara modular phone hardware. It provides a dummy
+  ALSA SoC codec driver for the APBridge audio interface, enabling
+  audio streaming between Greybus modules and the host processor
+  via the APBridge protocol.
+
+properties:
+  compatible:
+    const: toshiba,apb-dummy-codec
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    codec {
+        compatible = "toshiba,apb-dummy-codec";
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index b2040011a386..b6b4b488c0f7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11077,6 +11077,7 @@ GREYBUS AUDIO PROTOCOLS DRIVERS
 M:	Vaibhav Agarwal <vaibhav.sr@gmail.com>
 M:	Mark Greer <mgreer@animalcreek.com>
 S:	Maintained
+F:	Documentation/devicetree/bindings/sound/toshiba,apb-dummy-codec.yaml
 F:	drivers/staging/greybus/audio_apbridgea.c
 F:	drivers/staging/greybus/audio_apbridgea.h
 F:	drivers/staging/greybus/audio_codec.c
-- 
2.54.0