linux-kernel - [PATCH 08/11] ASoC: dt-bindings: clarify areg-supply documentation

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Message-Id: <20251217-sound-soc-codecs-tvl320adcx140-v1-8-293dea149d7b@pengutronix.de>
Date: Wed, 17 Dec 2025 14:54:58 +0100
From: Sascha Hauer <s.hauer@...gutronix.de>
To: Shenghao Ding <shenghao-ding@...com>, Kevin Lu <kevin-lu@...com>, 
 Baojun Xu <baojun.xu@...com>, Liam Girdwood <lgirdwood@...il.com>, 
 Mark Brown <broonie@...nel.org>, Jaroslav Kysela <perex@...ex.cz>, 
 Takashi Iwai <tiwai@...e.com>, 
 Sebastian Andrzej Siewior <bigeasy@...utronix.de>, 
 Clark Williams <clrkwllms@...nel.org>, Steven Rostedt <rostedt@...dmis.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Andrew Davis <afd@...com>, 
 Dan Murphy <dmurphy@...com>
Cc: linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Kevin Lu <luminlong@....com>, linux-rt-devel@...ts.linux.dev, 
 devicetree@...r.kernel.org, Sascha Hauer <s.hauer@...gutronix.de>, 
 Emil-Juhl <emdj@...g-olufsen.dk>
Subject: [PATCH 08/11] ASoC: dt-bindings: clarify areg-supply documentation

From: Emil-Juhl <emdj@...g-olufsen.dk>

The documentation for areg-supply could cause confusion mainly in terms
of the relationship between AREG and AVDD.
According to the datasheet[1] the AREG can be one of two cases:

1) an external 1.8V supply
2) generated by an internal regulator (hence a 1.8V output)

[1] https://www.ti.com/lit/ds/symlink/tlv320adc5140.pdf

Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
---
 Documentation/devicetree/bindings/sound/ti,tlv320adcx140.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/ti,tlv320adcx140.yaml b/Documentation/devicetree/bindings/sound/ti,tlv320adcx140.yaml
index 0f043a51f1822f4d39214438818e3bc84d3e8681..0c550c04f5ef239f403bea668ffd8c6051d86821 100644
--- a/Documentation/devicetree/bindings/sound/ti,tlv320adcx140.yaml
+++ b/Documentation/devicetree/bindings/sound/ti,tlv320adcx140.yaml
@@ -41,8 +41,8 @@ properties:
 
   areg-supply:
     description: |
-      Regulator with AVDD at 3.3V.  If not defined then the internal regulator
-      is enabled.
+      External supply of 1.8V. If not defined then the internal regulator is
+      enabled instead.
 
   avdd-supply:
     description: |

-- 
2.47.3