ASoC: wm8960: Add input boost volume control

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8960.c

@@ -204,6 +204,7 @@ static const DECLARE_TLV_DB_SCALE(adc_tlv, -9700, 50, 0);
 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 50, 1);
 static const DECLARE_TLV_DB_SCALE(bypass_tlv, -2100, 300, 0);
 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
+static const DECLARE_TLV_DB_SCALE(boost_tlv, -1200, 300, 1);
 
 static const struct snd_kcontrol_new wm8960_snd_controls[] = {
 SOC_DOUBLE_R_TLV("Capture Volume", WM8960_LINVOL, WM8960_RINVOL,
@@ -213,6 +214,15 @@ SOC_DOUBLE_R("Capture Volume ZC Switch", WM8960_LINVOL, WM8960_RINVOL,
 SOC_DOUBLE_R("Capture Switch", WM8960_LINVOL, WM8960_RINVOL,
 	7, 1, 0),
 
+SOC_SINGLE_TLV("Right Input Boost Mixer RINPUT3 Volume",
+	       WM8960_INBMIX1, 4, 7, 0, boost_tlv),
+SOC_SINGLE_TLV("Right Input Boost Mixer RINPUT2 Volume",
+	       WM8960_INBMIX1, 1, 7, 0, boost_tlv),
+SOC_SINGLE_TLV("Left Input Boost Mixer LINPUT3 Volume",
+	       WM8960_INBMIX2, 4, 7, 0, boost_tlv),
+SOC_SINGLE_TLV("Left Input Boost Mixer LINPUT2 Volume",
+	       WM8960_INBMIX2, 1, 7, 0, boost_tlv),
+
 SOC_DOUBLE_R_TLV("Playback Volume", WM8960_LDAC, WM8960_RDAC,
 		 0, 255, 0, dac_tlv),