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Message-Id: <20220621035452.60272-2-samuel@sholland.org>
Date: Mon, 20 Jun 2022 22:54:50 -0500
From: Samuel Holland <samuel@...lland.org>
To: Chen-Yu Tsai <wens@...e.org>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>
Cc: Arnaud Ferraris <arnaud.ferraris@...labora.com>,
Samuel Holland <samuel@...lland.org>,
Jaroslav Kysela <perex@...ex.cz>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Maxime Ripard <mripard@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-sunxi@...ts.linux.dev
Subject: [PATCH v2 1/3] ASoC: dt-bindings: sun50i-codec: Add binding for internal bias
From: Arnaud Ferraris <arnaud.ferraris@...labora.com>
In order to properly bias headset microphones, there should be a pull-up
resistor between pins HBIAS and MIC2P. This can be an external resistor,
but the codec also provides an internal 2.2K resistor which is enabled
by a register.
This patch adds a device-tree property to the sun50i-codec-analog driver
to take advantage of this feature.
Signed-off-by: Arnaud Ferraris <arnaud.ferraris@...labora.com>
[Samuel: split binding and implementation patches]
Signed-off-by: Samuel Holland <samuel@...lland.org>
---
(no changes since v1)
.../bindings/sound/allwinner,sun50i-a64-codec-analog.yaml | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml b/Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml
index 3b764415c9ab..66859eb8f79a 100644
--- a/Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml
+++ b/Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml
@@ -21,6 +21,11 @@ properties:
description:
Regulator for the headphone amplifier
+ allwinner,internal-bias-resistor:
+ description:
+ Enable the internal 2.2K bias resistor between HBIAS and MICDET pins
+ type: boolean
+
required:
- compatible
- reg
--
2.35.1
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