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
