[PATCH v2 3/3] ASoC: tlv320aic31xx: Add button press detection

[Andrew F. Davis]

This device can optionally detect headset or microphone button presses.
Add support for this by passing this event to the jack layer.

Signed-off-by: Andrew F. Davis <a...@ti.com>
---
 sound/soc/codecs/tlv320aic31xx.c | 17 +++++++++++++++--
 sound/soc/codecs/tlv320aic31xx.h |  3 ++-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index ccbd601c746d..102654761f25 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -1380,10 +1380,21 @@ static irqreturn_t aic31xx_irq(int irq, void *data)
                dev_err(dev, "Short circuit on Left output is detected\n");
        if (value & AIC31XX_HPRSCDETECT)
                dev_err(dev, "Short circuit on Right output is detected\n");
-       if (value & AIC31XX_HSPLUG) {
+       if (value & (AIC31XX_HSPLUG | AIC31XX_BUTTONPRESS)) {
                unsigned int val;
                int status = 0;
 
+               ret = regmap_read(aic31xx->regmap, AIC31XX_INTRDACFLAG2,
+                                 &val);
+               if (ret) {
+                       dev_err(dev, "Failed to read interrupt mask: %d\n",
+                               ret);
+                       goto exit;
+               }
+
+               if (val & AIC31XX_BUTTONPRESS)
+                       status |= SND_JACK_BTN_0;
+
                ret = regmap_read(aic31xx->regmap, AIC31XX_HSDETECT, &val);
                if (ret) {
                        dev_err(dev, "Failed to read headset type: %d\n", ret);
@@ -1408,7 +1419,8 @@ static irqreturn_t aic31xx_irq(int irq, void *data)
        }
        if (value & ~(AIC31XX_HPLSCDETECT |
                      AIC31XX_HPRSCDETECT |
-                     AIC31XX_HSPLUG))
+                     AIC31XX_HSPLUG |
+                     AIC31XX_BUTTONPRESS))
                dev_err(dev, "Unknown DAC interrupt flags: 0x%08x\n", value);
 
 read_overflow:
@@ -1522,6 +1534,7 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
 
                regmap_write(aic31xx->regmap, AIC31XX_INT1CTRL,
                             AIC31XX_HSPLUGDET |
+                            AIC31XX_BUTTONPRESSDET |
                             AIC31XX_SC |
                             AIC31XX_ENGINE);
 
diff --git a/sound/soc/codecs/tlv320aic31xx.h b/sound/soc/codecs/tlv320aic31xx.h
index 9985ceed97ae..cb024955c978 100644
--- a/sound/soc/codecs/tlv320aic31xx.h
+++ b/sound/soc/codecs/tlv320aic31xx.h
@@ -21,7 +21,8 @@
 #define DAC31XX_BIT                    BIT(3)
 
 #define AIC31XX_JACK_MASK (SND_JACK_HEADPHONE | \
-                          SND_JACK_HEADSET)
+                          SND_JACK_HEADSET | \
+                          SND_JACK_BTN_0)
 
 enum aic31xx_type {
        AIC3100 = 0,
-- 
2.18.0