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@xxxxxxxxxxx>
Co-developed-by: Venkata Prasad Potturu <quic_potturu@xxxxxxxxxxx>
Signed-off-by: Venkata Prasad Potturu <quic_potturu@xxxxxxxxxxx>
---
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";
--
2.7.4
