ASoC: pcm1792a: Add controls for output invert and rolloff switch

[s/output/Output/ -- broonie]
Signed-off-by: NMichael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/codecs/pcm1792a.c

@@ -36,6 +36,7 @@
 #define PCM1792A_DAC_VOL_LEFT	0x10
 #define PCM1792A_DAC_VOL_RIGHT	0x11
 #define PCM1792A_FMT_CONTROL	0x12
+#define PCM1792A_MODE_CONTROL	0x13
 #define PCM1792A_SOFT_MUTE	PCM1792A_FMT_CONTROL
 
 #define PCM1792A_FMT_MASK	0x70
@@ -164,6 +165,8 @@ static const struct snd_kcontrol_new pcm1792a_controls[] = {
 	SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1792A_DAC_VOL_LEFT,
 			 PCM1792A_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
 			 pcm1792a_dac_tlv),
+	SOC_SINGLE("DAC Invert Output Switch", PCM1792A_MODE_CONTROL, 7, 1, 0),
+	SOC_SINGLE("DAC Rolloff Filter Switch", PCM1792A_MODE_CONTROL, 1, 1, 0),
 };
 
 static const struct snd_soc_dapm_widget pcm1792a_dapm_widgets[] = {