---
 sound/soc/sunxi/sun4i-codec.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sound/soc/sunxi/sun4i-codec.c b/sound/soc/sunxi/sun4i-codec.c
index c47ffd5..564df33 100644
--- a/sound/soc/sunxi/sun4i-codec.c
+++ b/sound/soc/sunxi/sun4i-codec.c
@@ -107,6 +107,7 @@
 #define SUN4I_CODEC_ADC_ACTL_PREG2                     (23)
 #define SUN4I_CODEC_ADC_ACTL_VADCG                     (20)
 #define SUN4I_CODEC_ADC_ACTL_ADCIS                     (17)
+#define SUN4I_CODEC_ADC_ACTL_LNPREG                    (13)
 #define SUN4I_CODEC_ADC_ACTL_PA_EN                     (4)
 #define SUN4I_CODEC_ADC_ACTL_DDE                       (3)
 #define SUN4I_CODEC_ADC_DEBUG                  (0x2c)
@@ -659,6 +660,8 @@ static const struct snd_kcontrol_new sun4i_codec_pa_mute =
 static DECLARE_TLV_DB_SCALE(sun4i_codec_pa_volume_scale, -6300, 100, 1);
 static DECLARE_TLV_DB_SCALE(sun4i_codec_linein_loopback_gain_scale, -150, 150,
                            0);
+static DECLARE_TLV_DB_SCALE(sun4i_codec_linein_preamp_gain_scale, -1200, 300,
+                           0);
 static DECLARE_TLV_DB_SCALE(sun4i_codec_fmin_loopback_gain_scale, -450, 150,
                            0);
 static DECLARE_TLV_DB_SCALE(sun4i_codec_micin_loopback_gain_scale, -450, 150,
@@ -677,6 +680,9 @@ static const struct snd_kcontrol_new sun4i_codec_controls[] 
= {
        SOC_SINGLE_TLV("Line Playback Volume", SUN4I_CODEC_DAC_ACTL,
                       SUN4I_CODEC_DAC_ACTL_LNG, 1, 0,
                       sun4i_codec_linein_loopback_gain_scale),
+       SOC_SINGLE_TLV("Line Boost Volume", SUN4I_CODEC_ADC_ACTL,
+                      SUN4I_CODEC_ADC_ACTL_LNPREG, 7, 0,
+                      sun4i_codec_linein_preamp_gain_scale),
        SOC_SINGLE_TLV("FM Playback Volume", SUN4I_CODEC_DAC_ACTL,
                       SUN4I_CODEC_DAC_ACTL_FMG, 3, 0,
                       sun4i_codec_fmin_loopback_gain_scale),
-- 
2.1.4

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