ASoC: sn95032: hardware volume and mute controls for sn95038 codec driver

This patch adds alsa mixer digital volume controls to headphone and spekaer
paths.  Application can control left and right volume individually for each
path.

Change-Id: I514ee1a6f72fde1db53721198a190a17c1150bab
Signed-off-by: Ramesh Babu K V <ramesh.babu@intel.com>

diff --git a/sound/soc/codecs/sn95031.c b/sound/soc/codecs/sn95031.c
index 7a602c2..ed49399 100644 (file)
--- a/sound/soc/codecs/sn95031.c
+++ b/sound/soc/codecs/sn95031.c
@@ -375,6 +375,8 @@ static const char *sn95031_micmode_text[] = {"Single Ended", "Differential"};
 
 /* 0dB to 30dB in 10dB steps */
 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 10, 0);
+/* -62db to 9 db in 1db steps*/
+static const DECLARE_TLV_DB_SCALE(out_tlv, -6200, 100, 0);
 
 static const struct soc_enum sn95031_micmode1_enum =
        SOC_ENUM_SINGLE(SN95031_MICAMP1, 1, 2, sn95031_micmode_text);
@@ -417,6 +419,16 @@ static const struct snd_kcontrol_new sn95031_snd_controls[] = {
                        2, 4, 0, mic_tlv),
        SOC_SINGLE_TLV("Mic2 Capture Volume", SN95031_MICAMP2,
                        2, 4, 0, mic_tlv),
+       /* Add digital volume and mute controls for Headphone/Headset*/
+       SOC_DOUBLE_R_TLV("Headphone Playback Volume", SN95031_HSLVOLCTRL,
+                               SN95031_HSRVOLCTRL, 0, 71, 1, out_tlv),
+       SOC_DOUBLE_R("Headphone Playback Switch", SN95031_HSLVOLCTRL,
+                               SN95031_HSRVOLCTRL, 7, 1, 0),
+       /* Add digital volume and mute controls for Speaker*/
+       SOC_DOUBLE_R_TLV("Speaker Playback Volume", SN95031_IHFLVOLCTRL,
+                               SN95031_IHFRVOLCTRL, 0, 71, 1, out_tlv),
+       SOC_DOUBLE_R("Speaker Playback Switch", SN95031_IHFLVOLCTRL,
+                               SN95031_IHFRVOLCTRL, 7, 1, 0),
 };
 
 /* DAPM widgets */