ASoC: sun4i-codec: Add MIC2 Pre-Amplifier, Mic2 input

Add MIC2 Pre-Amplifier, Mic2 input for Allwinner A10 and Allwinner A20.

Previously, there only the Mic1 input and MIC1 Pre-Amplifier was exposed.
This exposes the Mic2 input and MIC2 Pre-Amplifier.
Signed-off-by: Danny Milosavljevic <dannym@scratchpost.org>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sunxi/sun4i-codec.c

@@ -64,6 +64,7 @@
 #define SUN4I_CODEC_DAC_ACTL_DACAENR			(31)
 #define SUN4I_CODEC_DAC_ACTL_DACAENL			(30)
 #define SUN4I_CODEC_DAC_ACTL_MIXEN			(29)
+#define SUN4I_CODEC_DAC_ACTL_MICG			(20)
 #define SUN4I_CODEC_DAC_ACTL_LDACLMIXS			(15)
 #define SUN4I_CODEC_DAC_ACTL_RDACRMIXS			(14)
 #define SUN4I_CODEC_DAC_ACTL_LDACRMIXS			(13)
@@ -673,6 +674,8 @@ static const struct snd_kcontrol_new sun4i_codec_pa_mute =
 			SUN4I_CODEC_DAC_ACTL_PA_MUTE, 1, 0);
 
 static DECLARE_TLV_DB_SCALE(sun4i_codec_pa_volume_scale, -6300, 100, 1);
+static DECLARE_TLV_DB_SCALE(sun4i_codec_micin_loopback_gain_scale, -450, 150,
+			    0);
 
 static const struct snd_kcontrol_new sun4i_codec_controls[] = {
 	SOC_SINGLE_TLV("Power Amplifier Volume", SUN4I_CODEC_DAC_ACTL,
@@ -741,6 +744,8 @@ static const struct snd_soc_dapm_widget sun4i_codec_codec_dapm_widgets[] = {
 	/* Mic Pre-Amplifiers */
 	SND_SOC_DAPM_PGA("MIC1 Pre-Amplifier", SUN4I_CODEC_ADC_ACTL,
 			 SUN4I_CODEC_ADC_ACTL_PREG1EN, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("MIC2 Pre-Amplifier", SUN4I_CODEC_ADC_ACTL,
+			 SUN4I_CODEC_ADC_ACTL_PREG2EN, 0, NULL, 0),
 
 	/* Power Amplifier */
 	SND_SOC_DAPM_MIXER("Power Amplifier", SUN4I_CODEC_ADC_ACTL,
@@ -751,6 +756,7 @@ static const struct snd_soc_dapm_widget sun4i_codec_codec_dapm_widgets[] = {
 			    &sun4i_codec_pa_mute),
 
 	SND_SOC_DAPM_INPUT("Mic1"),
+	SND_SOC_DAPM_INPUT("Mic2"),
 
 	SND_SOC_DAPM_OUTPUT("HP Right"),
 	SND_SOC_DAPM_OUTPUT("HP Left"),
@@ -790,6 +796,12 @@ static const struct snd_soc_dapm_route sun4i_codec_codec_dapm_routes[] = {
 	{ "Right ADC", NULL, "MIC1 Pre-Amplifier" },
 	{ "MIC1 Pre-Amplifier", NULL, "Mic1"},
 	{ "Mic1", NULL, "VMIC" },
+
+	/* Mic2 Routes */
+	{ "Left ADC", NULL, "MIC2 Pre-Amplifier" },
+	{ "Right ADC", NULL, "MIC2 Pre-Amplifier" },
+	{ "MIC2 Pre-Amplifier", NULL, "Mic2"},
+	{ "Mic2", NULL, "VMIC" },
 };
 
 static const struct snd_soc_component_driver sun4i_codec_codec = {