diff options
| author | Arnaud Ferraris <arnaud.ferraris@collabora.com> | 2022-06-20 22:54:51 -0500 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-06-27 13:18:04 +0100 |
| commit | 25ae1a04da0d32c22db0b018e5668129b91fa104 (patch) | |
| tree | 7deec89c2768a55ae60acace65d18b487ae96632 | |
| parent | 24e0b04dd42be34ec4b18dc1a1e139d66eb572a3 (diff) | |
| download | linux-25ae1a04da0d32c22db0b018e5668129b91fa104.tar.bz2 | |
ASoC: sun50i-codec-analog: Add support 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 enables or disables the internal bias resistor based on a
device tree property.
Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
[Samuel: split binding and implementation; move to device probe]
Signed-off-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20220621035452.60272-3-samuel@sholland.org
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | sound/soc/sunxi/sun50i-codec-analog.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sound/soc/sunxi/sun50i-codec-analog.c b/sound/soc/sunxi/sun50i-codec-analog.c index a41e25ad0aaf..e1e5e8de0130 100644 --- a/sound/soc/sunxi/sun50i-codec-analog.c +++ b/sound/soc/sunxi/sun50i-codec-analog.c @@ -117,6 +117,7 @@ #define SUN50I_ADDA_HS_MBIAS_CTRL_MMICBIASEN 7 #define SUN50I_ADDA_JACK_MIC_CTRL 0x1d +#define SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN 6 #define SUN50I_ADDA_JACK_MIC_CTRL_HMICBIASEN 5 /* mixer controls */ @@ -507,6 +508,7 @@ static int sun50i_codec_analog_probe(struct platform_device *pdev) { struct regmap *regmap; void __iomem *base; + bool enable; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) { @@ -520,6 +522,12 @@ static int sun50i_codec_analog_probe(struct platform_device *pdev) return PTR_ERR(regmap); } + enable = device_property_read_bool(&pdev->dev, + "allwinner,internal-bias-resistor"); + regmap_update_bits(regmap, SUN50I_ADDA_JACK_MIC_CTRL, + BIT(SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN), + enable << SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN); + return devm_snd_soc_register_component(&pdev->dev, &sun50i_codec_analog_cmpnt_drv, NULL, 0); |