diff options
| author | Arnaud Ferraris <arnaud.ferraris@collabora.com> | 2022-06-21 06:54:50 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-06-27 15:18:03 +0300 |
| commit | 24e0b04dd42be34ec4b18dc1a1e139d66eb572a3 (patch) | |
| tree | 275d00afc8b3499ee0025ee75ae7e98d212ea9cf | |
| parent | 658e95953075ca781ef8712d0a3203e485888c7f (diff) | |
| download | linux-24e0b04dd42be34ec4b18dc1a1e139d66eb572a3.tar.xz | |
ASoC: dt-bindings: sun50i-codec: Add binding for internal bias
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>
| -rw-r--r-- | Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml | 5 |
1 files changed, 5 insertions, 0 deletions
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 |