From b97140830fe19487ed252a6513940890382dc069 Mon Sep 17 00:00:00 2001 From: Arnaud Ferraris Date: Fri, 3 Apr 2020 11:24:39 +0200 Subject: [PATCH 249/389] ASoC: sun50i-codec-analog: Add support for internal bias In order to properly bias headset microphones, there should be a resistor between pins HBIAS and MICDET. This can be an external resistor, but the codec also provides an internal 2.2K resistor which can be enabled by a register. This patch enables or disables the internal bias resistor based on the appropriate device tree property. Signed-off-by: Arnaud Ferraris [Samuel: split binding and implementation patches] Signed-off-by: Samuel Holland --- sound/soc/sunxi/sun50i-codec-analog.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/sound/soc/sunxi/sun50i-codec-analog.c b/sound/soc/sunxi/sun50i-codec-analog.c index e1e5e8de0130..c32aa35521e2 100644 --- a/sound/soc/sunxi/sun50i-codec-analog.c +++ b/sound/soc/sunxi/sun50i-codec-analog.c @@ -120,6 +120,10 @@ #define SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN 6 #define SUN50I_ADDA_JACK_MIC_CTRL_HMICBIASEN 5 +struct sun50i_codec_analog { + bool internal_bias_resistor; +}; + /* mixer controls */ static const struct snd_kcontrol_new sun50i_a64_codec_mixer_controls[] = { SOC_DAPM_DOUBLE_R("Mic1 Playback Switch", @@ -472,6 +476,18 @@ static const struct snd_soc_dapm_route sun50i_a64_codec_routes[] = { { "EARPIECE", NULL, "Earpiece Amp" }, }; +static int sun50i_a64_codec_probe(struct snd_soc_component *component) +{ + struct sun50i_codec_analog *codec = snd_soc_component_get_drvdata(component); + + regmap_update_bits(component->regmap, SUN50I_ADDA_JACK_MIC_CTRL, + BIT(SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN), + codec->internal_bias_resistor << + SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN); + + return 0; +} + static int sun50i_a64_codec_suspend(struct snd_soc_component *component) { return regmap_update_bits(component->regmap, SUN50I_ADDA_HP_CTRL, @@ -492,6 +508,7 @@ static const struct snd_soc_component_driver sun50i_codec_analog_cmpnt_drv = { .num_dapm_widgets = ARRAY_SIZE(sun50i_a64_codec_widgets), .dapm_routes = sun50i_a64_codec_routes, .num_dapm_routes = ARRAY_SIZE(sun50i_a64_codec_routes), + .probe = sun50i_a64_codec_probe, .suspend = sun50i_a64_codec_suspend, .resume = sun50i_a64_codec_resume, }; @@ -506,10 +523,20 @@ MODULE_DEVICE_TABLE(of, sun50i_codec_analog_of_match); static int sun50i_codec_analog_probe(struct platform_device *pdev) { + struct sun50i_codec_analog *codec; struct regmap *regmap; void __iomem *base; bool enable; + codec = devm_kzalloc(&pdev->dev, sizeof(*codec), GFP_KERNEL); + if (!codec) + return -ENOMEM; + + codec->internal_bias_resistor = of_property_read_bool(pdev->dev.of_node, + "allwinner,internal-bias-resistor"); + + platform_set_drvdata(pdev, codec); + base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) { dev_err(&pdev->dev, "Failed to map the registers\n"); -- 2.35.3