ASoC: TWL4030: Change the Master volume control to TLV

TWL4030 FGAIN volume control has a range:
-62 to 0 dB in 1 dB steps, 0 in the FGAIN means mute.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
index 49c7da39497e..498c42f7c6e0 100644
--- a/sound/soc/codecs/twl4030.c
+++ b/sound/soc/codecs/twl4030.c
@@ -33,6 +33,7 @@
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
 #include <sound/initval.h>
+#include <sound/tlv.h>
 
 #include "twl4030.h"
 
@@ -189,10 +190,16 @@ static void twl4030_init_chip(struct snd_soc_codec *codec)
 
 }
 
+/*
+ * FGAIN volume control:
+ * from -62 to 0 dB in 1 dB steps (mute instead of -63 dB)
+ */
+static DECLARE_TLV_DB_SCALE(master_tlv, -6300, 100, 1);
+
 static const struct snd_kcontrol_new twl4030_snd_controls[] = {
-        SOC_DOUBLE_R("Master Playback Volume",
+        SOC_DOUBLE_R_TLV("Master Playback Volume",
                  TWL4030_REG_ARXL2PGA, TWL4030_REG_ARXR2PGA,
-                0, 0x3f, 0),
+                0, 0x3f, 0, master_tlv),
         SOC_DOUBLE_R("Capture Volume",
                  TWL4030_REG_ATXL1PGA, TWL4030_REG_ATXR1PGA,
                 0, 0x1f, 0),