24e0b04dd4
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@collabora.com> [Samuel: split binding and implementation patches] Signed-off-by: Samuel Holland <samuel@sholland.org> Link: https://lore.kernel.org/r/20220621035452.60272-2-samuel@sholland.org Signed-off-by: Mark Brown <broonie@kernel.org>
45 lines
919 B
YAML
45 lines
919 B
YAML
# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/sound/allwinner,sun50i-a64-codec-analog.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Allwinner A64 Analog Codec Device Tree Bindings
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maintainers:
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- Chen-Yu Tsai <wens@csie.org>
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- Maxime Ripard <mripard@kernel.org>
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properties:
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compatible:
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const: allwinner,sun50i-a64-codec-analog
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reg:
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maxItems: 1
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cpvdd-supply:
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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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required:
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- compatible
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- reg
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- cpvdd-supply
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additionalProperties: false
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examples:
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- |
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codec_analog: codec-analog@1f015c0 {
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compatible = "allwinner,sun50i-a64-codec-analog";
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reg = <0x01f015c0 0x4>;
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cpvdd-supply = <®_eldo1>;
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};
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...
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