linux-kernel - [PATCH 1/2] ASoC: dt-bindings: tlv320adc3xxx: Add MICBIAS-as-GPO properties

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Date: Wed, 29 May 2024 18:33:44 +0200
From: Ricard Wanderlof <ricard.wanderlof@...s.com>
To: Mark Brown <broonie@...nel.org>, Liam Girdwood <lgirdwood@...il.com>,
	Shenghao Ding <shenghao-ding@...com>, Kevin Lu <kevin-lu@...com>, Baojun Xu
	<baojun.xu@...com>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
	<krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Ricard Wanderlof
	<ricardw@...s.com>, Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai
	<tiwai@...e.com>
CC: <alsa-devel@...a-project.org>, <linux-sound@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, "Ricard
 Wanderlof" <ricard.wanderlof@...s.com>, <kernel@...s.com>
Subject: [PATCH 1/2] ASoC: dt-bindings: tlv320adc3xxx: Add MICBIAS-as-GPO
 properties

Add properties for configuring the MICBIAS pins as general purpose
outputs, with some limitations: The voltage on the pin when activated
may be set using another property to 2.0 V, 2.5 V or AVDD.
When deactivated the pin will float.

Signed-off-by: Ricard Wanderlof <ricard.wanderlof@...s.com>
---
 .../devicetree/bindings/sound/ti,tlv320adc3xxx.yaml  | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/ti,tlv320adc3xxx.yaml b/Documentation/devicetree/bindings/sound/ti,tlv320adc3xxx.yaml
index ede14ca2c07a..4172aced1386 100644
--- a/Documentation/devicetree/bindings/sound/ti,tlv320adc3xxx.yaml
+++ b/Documentation/devicetree/bindings/sound/ti,tlv320adc3xxx.yaml
@@ -82,6 +82,26 @@ properties:
       Note that there is currently no support for reading the GPIO pins as
       inputs.
 
+  ti,micbias1-gpo:
+    type: boolean
+    description: |
+      When set, the MICBIAS1 pin may be controlled via the GPIO framework,
+      as pin number 3 on the device.
+
+      In this mode, when the pin is activated, it will be set to the voltage
+      specified by the ti,micbias1-vg property. When deactivated, the pin will
+      float.
+
+  ti,micbias2-gpo:
+    type: boolean
+    description: |
+      When set, the MICBIAS2 pin may be controlled via the GPIO framework,
+      as pin number 4 on the device.
+
+      In this mode, when the pin is activated, it will be set to the voltage
+      specified by the ti,micbias1-vg property. When deactivated, the pin will
+      float.
+
   ti,micbias1-vg:
     $ref: /schemas/types.yaml#/definitions/uint32
     enum:

-- 
2.30.2