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@xxxxxxxxx>
---
sound/soc/codecs/twl4030.c | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
index 49c7da3..498c42f 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),
--
1.6.0.3
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