[alsa-devel] [PATCH] ASoC: nau8824: user configuration of key detection

[John Hsu]

The SAR ADC of key press detection varies depending on headset.
We can't make a set of common threshold values for every case.
Therefore, the driver provides configuration for user and
they can set up values by UCM configuration.

Signed-off-by: John Hsu <KCHSU0 at nuvoton.com>
---
 sound/soc/codecs/nau8824.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sound/soc/codecs/nau8824.c b/sound/soc/codecs/nau8824.c
index 637e952..76502c0 100644
--- a/sound/soc/codecs/nau8824.c
+++ b/sound/soc/codecs/nau8824.c
@@ -409,6 +409,15 @@ static const struct snd_kcontrol_new nau8824_snd_controls[] = {
 
 	SOC_SINGLE("DACL LR Mix", NAU8824_REG_DAC_MUTE_CTRL, 0, 1, 0),
 	SOC_SINGLE("DACR LR Mix", NAU8824_REG_DAC_MUTE_CTRL, 1, 1, 0),
+
+	SOC_SINGLE("THD for key media",
+		NAU8824_REG_VDET_THRESHOLD_1, 8, 0xff, 0),
+	SOC_SINGLE("THD for key voice command",
+		NAU8824_REG_VDET_THRESHOLD_1, 0, 0xff, 0),
+	SOC_SINGLE("THD for key volume up",
+		NAU8824_REG_VDET_THRESHOLD_2, 8, 0xff, 0),
+	SOC_SINGLE("THD for key volume down",
+		NAU8824_REG_VDET_THRESHOLD_2, 0, 0xff, 0),
 };
 
 static int nau8824_output_dac_event(struct snd_soc_dapm_widget *w,
-- 
2.6.4