41 lines
1.5 KiB
Diff
41 lines
1.5 KiB
Diff
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From 82bfb165902cd86d56517ffb90fdeeffafdde6de Mon Sep 17 00:00:00 2001
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From: Arnaud Ferraris <arnaud.ferraris@collabora.com>
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Date: Sun, 20 Sep 2020 20:26:36 -0500
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Subject: [PATCH 394/478] ASoC: dt-bindings: sun50i-codec: Add binding for
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internal bias
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In order to properly bias headset microphones, there should be a
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resistor between pins HBIAS and MICDET. This can be an external
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resistor, but the codec also provides an internal 2.2K resistor which
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can be enabled by a register.
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This patch adds a device-tree property to the sun50i-codec-analog driver
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to take advantage of this feature.
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Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
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[Samuel: split binding and implementation patches]
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Signed-off-by: Samuel Holland <samuel@sholland.org>
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---
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.../bindings/sound/allwinner,sun50i-a64-codec-analog.yaml | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml b/Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml
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index 3b764415c9ab..66859eb8f79a 100644
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--- a/Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml
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+++ b/Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml
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@@ -21,6 +21,11 @@ properties:
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description:
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Regulator for the headphone amplifier
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+ allwinner,internal-bias-resistor:
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+ description:
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+ Enable the internal 2.2K bias resistor between HBIAS and MICDET pins
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+ type: boolean
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+
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required:
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- compatible
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- reg
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--
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2.35.3
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