Document the internal DAC audio codec integrated in the Sophgo
CV1800B SoC.
The codec doesn't have any special configuration at the moment.

Signed-off-by: Anton D. Stavinskii <stavinsky@gmail.com>
---
 .../bindings/sound/sophgo,cv1800b-sound-dac.yaml   | 43 ++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/sophgo,cv1800b-sound-dac.yaml b/Documentation/devicetree/bindings/sound/sophgo,cv1800b-sound-dac.yaml
new file mode 100644
index 000000000000..2a35e38dc7f9
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/sophgo,cv1800b-sound-dac.yaml
@@ -0,0 +1,43 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/sophgo,cv1800b-sound-dac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sophgo CV1800B internal DAC audio codec
+
+maintainers:
+  - Anton D. Stavinskii <stavinsky@gmail.com>
+
+description: |
+  Internal DAC audio codec integrated in the Sophgo CV1800B SoC.
+  The codec exposes a single playback DAI and is intended to be connected to an
+  I2S/TDM controller via an ASoC machine driver.
+
+properties:
+  compatible:
+    const: sophgo,cv1800b-sound-dac
+
+  reg:
+    maxItems: 1
+    description: |
+      Register base address and size of the internal DAC codec register block.
+
+  "#sound-dai-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - "#sound-dai-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    audio-codec@300A000  {
+      compatible = "sophgo,cv1800b-sound-dac";
+      #sound-dai-cells = <0>;
+      reg = <0x0300A000 0x100>;
+    };
+...

-- 
2.43.0

On Sun, Jan 18, 2026 at 12:18:57AM +0400, Anton D. Stavinskii wrote:
> Document the internal DAC audio codec integrated in the Sophgo
> CV1800B SoC.

Squash the binding into previous binding.

> The codec doesn't have any special configuration at the moment.

At the moment? Hardware is done. It does not evolve.

Write complete bindings, see writing-bindings document.

Best regards,
Krzysztof

On Sun, Jan 18, 2026 at 11:16:15AM +0400, Krzysztof Kozlowski wrote:
> On Sun, Jan 18, 2026 at 12:18:57AM +0400, Anton D. Stavinskii wrote:
> > Document the internal DAC audio codec integrated in the Sophgo
> > CV1800B SoC.
> 
> Squash the binding into previous binding.
> 
> > The codec doesn't have any special configuration at the moment.
> 
> At the moment? Hardware is done. It does not evolve.
Will reprhase, thanks. 
For sure hardware is done, but I'm afraid I could miss some
functionality because I have access only to public documentation and it
is not full enough. For example there is some kind of amplification
limiter register field but there is no information for now how it should
be used. 
> 
> Write complete bindings, see writing-bindings document.
> 
> Best regards,
> Krzysztof
>