On 03/05/2024 20:55, Artur Weber wrote:
Some Samsung devices that use the midas_wm1811 driver use a GPIO-based method for detecting whether the headset jack is plugged in, as well as detecting which headset buttons are pressed. There are two GPIOs: a "headset detect" GPIO responsible for detecting jack insertion, and a "headset key" GPIO which triggers when a button on the headset is pressed. The plug type and the button pressed are determined based on information from an ADC channel.
...
@@ -433,6 +590,9 @@ static int midas_probe(struct platform_device *pdev) struct snd_soc_card *card = &midas_card; struct device *dev = &pdev->dev; static struct snd_soc_dai_link *dai_link;
- enum iio_chan_type channel_type;
- u32 fourpole_threshold[2];
- u32 button_threshold[3]; struct midas_priv *priv; int ret, i;
@@ -468,6 +628,91 @@ static int midas_probe(struct platform_device *pdev) return PTR_ERR(priv->gpio_lineout_sel); }
- priv->gpio_headset_detect = devm_gpiod_get_optional(dev,
"headset-detect", GPIOD_IN);- if (IS_ERR(priv->gpio_headset_detect)) {
dev_err(dev, "Failed to get headset jack detect GPIO\n");
syntax is: return dev_err_probe()
return PTR_ERR(priv->gpio_headset_detect);- }
- if (priv->gpio_headset_detect) {
priv->adc_headset_detect = devm_iio_channel_get(dev,"headset-detect");if (IS_ERR(priv->adc_headset_detect)) {dev_err(dev, "Failed to get ADC channel\n");
return dev_err_probe()
return PTR_ERR(priv->adc_headset_detect);}
ret = iio_get_channel_type(priv->adc_headset_detect,&channel_type);if (ret) {dev_err(dev, "Failed to get ADC channel type\n");return ret;}if (channel_type != IIO_VOLTAGE) {dev_err(dev, "ADC channel is not voltage\n");return ret;}priv->gpio_headset_key = devm_gpiod_get(dev, "headset-key",GPIOD_IN);if (IS_ERR(priv->gpio_headset_key)) {dev_err(dev, "Failed to get headset key gpio\n");
return dev_err_probe()
Best regards, Krzysztof