linux-kernel - [PATCH 2/2] ASoC: dt-bindings: ti,pcm1754: add binding documentation

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Message-Id: <20250818-v6-12-topic-pcm1754-v1-2-e1dd189ea99a@pengutronix.de>
Date: Mon, 18 Aug 2025 15:01:08 +0200
From: Stefan Kerkmann <s.kerkmann@...gutronix.de>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Jaroslav Kysela <perex@...ex.cz>, 
 Takashi Iwai <tiwai@...e.com>, 
 Alvin Šipraga <alsi@...g-olufsen.dk>
Cc: linux-sound@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, kernel@...gutronix.de, 
 Stefan Kerkmann <s.kerkmann@...gutronix.de>
Subject: [PATCH 2/2] ASoC: dt-bindings: ti,pcm1754: add binding
 documentation

The Texas Instruments PCM1754 is a simple stereo DAC without any digital
management interface but soft mute, PCM input format and 44.1 kHz
digital de-emphasis can be configured via strapping pins. Only soft mute
and PCM input format selection is currently exposed via optional GPIOs
in the driver.

Signed-off-by: Stefan Kerkmann <s.kerkmann@...gutronix.de>
---
 .../devicetree/bindings/sound/ti,pcm1754.yaml      | 54 ++++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/ti,pcm1754.yaml b/Documentation/devicetree/bindings/sound/ti,pcm1754.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..924386092a60e6637a1134f174511e7e61b16839
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/ti,pcm1754.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/ti,pcm1754.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments PCM1754 Stereo DAC
+
+description: |
+  The PCM1754 is a simple stereo DAC that is controlled via hardware gpios.
+
+maintainers:
+  - Stefan Kerkmann <s.kerkmann@...gutronix.de>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - ti,pcm1754
+
+  VCC-supply: true
+
+  '#sound-dai-cells':
+    const: 0
+
+  format-gpios:
+    maxItems: 1
+    description:
+      GPIO used to select the PCM format
+
+  mute-gpios:
+    maxItems: 1
+    description:
+      GPIO used to mute all outputs
+
+required:
+  - "#sound-dai-cells"
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    codec {
+      compatible = "ti,pcm1754";
+      #sound-dai-cells = <0>;
+
+      VCC-supply = <&vcc_reg>;
+      mute-gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+      format-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+    };

-- 
2.39.5