Unverified Commit 013cc2ae authored by Srinivasa Rao Mandadapu's avatar Srinivasa Rao Mandadapu Committed by Mark Brown
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ASoC: codec: wcd938x: Add switch control for selecting CTIA/OMTP Headset 



Add switch control for selecting CTIA or OMTP Headset by swapping
gnd and mic with the help of GPIO.

Signed-off-by: default avatarSrinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Co-developed-by: default avatarVenkata Prasad Potturu <quic_potturu@quicinc.com>
Signed-off-by: default avatarVenkata Prasad Potturu <quic_potturu@quicinc.com>
Link: https://lore.kernel.org/r/1644668672-29790-2-git-send-email-quic_srivasam@quicinc.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent e7c799e7

sound/soc/codecs/wcd938x.c

+38 −0
Original line number Diff line number Diff line
@@ -194,6 +194,7 @@ struct wcd938x_priv { 
	int ear_rx_path;

	int variant;

	int reset_gpio;

	int us_euro_gpio;

	u32 micb1_mv;

	u32 micb2_mv;

	u32 micb3_mv;
@@ -4196,6 +4197,33 @@ static void wcd938x_dt_parse_micbias_info(struct device *dev, struct wcd938x_pri 
		dev_info(dev, "%s: Micbias4 DT property not found\n", __func__);

}



static bool wcd938x_swap_gnd_mic(struct snd_soc_component *component, bool active)

{

	int value;



	struct wcd938x_priv *wcd938x;



	if (!component) {

		dev_err(component->dev, "%s component is NULL\n", __func__);

		return false;

	}



	wcd938x = snd_soc_component_get_drvdata(component);

	if (!wcd938x) {

		dev_err(component->dev, "%s private data is NULL\n", __func__);

		return false;

	}



	value = gpio_get_value(wcd938x->us_euro_gpio);



	gpio_set_value(wcd938x->us_euro_gpio, !value);

	/* 20us sleep required after changing the gpio state*/

	usleep_range(20, 30);



	return true;

}





static int wcd938x_populate_dt_data(struct wcd938x_priv *wcd938x, struct device *dev)

{

	struct wcd_mbhc_config *cfg = &wcd938x->mbhc_cfg;
@@ -4208,6 +4236,16 @@ static int wcd938x_populate_dt_data(struct wcd938x_priv *wcd938x, struct device 
		return wcd938x->reset_gpio;

	}



	wcd938x->us_euro_gpio = of_get_named_gpio(dev->of_node, "us-euro-gpios", 0);

	if (wcd938x->us_euro_gpio < 0) {

		dev_err(dev, "Failed to get us-euro-gpios gpio: err = %d\n", wcd938x->us_euro_gpio);

	} else {

		cfg->swap_gnd_mic = wcd938x_swap_gnd_mic;

		gpio_direction_output(wcd938x->us_euro_gpio, 0);

		/* 20us sleep required after pulling the reset gpio to LOW */

		usleep_range(20, 30);

	}



	wcd938x->supplies[0].supply = "vdd-rxtx";

	wcd938x->supplies[1].supply = "vdd-io";

	wcd938x->supplies[2].supply = "vdd-buck";