ASoC: tlv320aic3x: headset/button press support

- Add aic3x_set_headset_detection() function to define the headset
  detection mode for tlv32aic3x chips
- added aic3x_button_pressed()
- Read from the real-time registers in aic3x_headset_detected() to query
  headset presence without an occured interrupt

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 29 insertions, 2 deletions

diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
index 0f4067bdd4a3..341e1adc9167 100644
--- a/sound/soc/codecs/tlv320aic3x.c
+++ b/sound/soc/codecs/tlv320aic3x.c
@@ -1018,14 +1018,41 @@ int aic3x_get_gpio(struct snd_soc_codec *codec, int gpio)
 }
 EXPORT_SYMBOL_GPL(aic3x_get_gpio);
 
+void aic3x_set_headset_detection(struct snd_soc_codec *codec, int detect,
+                                 int headset_debounce, int button_debounce)
+{
+        u8 val;
+
+        val = ((detect & AIC3X_HEADSET_DETECT_MASK)
+                << AIC3X_HEADSET_DETECT_SHIFT) |
+              ((headset_debounce & AIC3X_HEADSET_DEBOUNCE_MASK)
+                << AIC3X_HEADSET_DEBOUNCE_SHIFT) |
+              ((button_debounce & AIC3X_BUTTON_DEBOUNCE_MASK)
+                << AIC3X_BUTTON_DEBOUNCE_SHIFT);
+
+        if (detect & AIC3X_HEADSET_DETECT_MASK)
+                val |= AIC3X_HEADSET_DETECT_ENABLED;
+
+        aic3x_write(codec, AIC3X_HEADSET_DETECT_CTRL_A, val);
+}
+EXPORT_SYMBOL_GPL(aic3x_set_headset_detection);
+
 int aic3x_headset_detected(struct snd_soc_codec *codec)
 {
         u8 val;
-        aic3x_read(codec, AIC3X_RT_IRQ_FLAGS_REG, &val);
-        return (val >> 2) & 1;
+        aic3x_read(codec, AIC3X_HEADSET_DETECT_CTRL_B, &val);
+        return (val >> 4) & 1;
 }
 EXPORT_SYMBOL_GPL(aic3x_headset_detected);
 
+int aic3x_button_pressed(struct snd_soc_codec *codec)
+{
+        u8 val;
+        aic3x_read(codec, AIC3X_HEADSET_DETECT_CTRL_B, &val);
+        return (val >> 5) & 1;
+}
+EXPORT_SYMBOL_GPL(aic3x_button_pressed);
+
 #define AIC3X_RATES     SNDRV_PCM_RATE_8000_96000
 #define AIC3X_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)