Add switch control for selecting CTIA or OMTP Headset by swapping gnd and mic with the help of GPIO.
Signed-off-by: Srinivasa Rao Mandadapu quic_srivasam@quicinc.com Co-developed-by: Venkata Prasad Potturu quic_potturu@quicinc.com Signed-off-by: Venkata Prasad Potturu quic_potturu@quicinc.com --- sound/soc/codecs/wcd938x.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+)
diff --git a/sound/soc/codecs/wcd938x.c b/sound/soc/codecs/wcd938x.c index eff200a..08d16a9 100644 --- a/sound/soc/codecs/wcd938x.c +++ b/sound/soc/codecs/wcd938x.c @@ -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";