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authorLars-Peter Clausen <lars@metafoo.de>2011-06-06 13:38:40 +0200
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-06-06 21:54:43 +0100
commitf97d0c6d5f947a96a6d3957eff3da6d9ca246e54 (patch)
treebff19452670e6551b90bb9be54a81a3f7dad9dfa /sound/soc/codecs/ad1836.c
parent583eadab21779c4301f01a11bf3d0d49b643aa80 (diff)
downloadkernel-f97d0c6d5f947a96a6d3957eff3da6d9ca246e54.tar.gz
ASoC: AD1836: Add input gain control for ADC2
The AD1836 has a PGA for its second ADC. This patch adds a control for adjusting the the gain of the PGA. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/codecs/ad1836.c')
-rw-r--r--sound/soc/codecs/ad1836.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/sound/soc/codecs/ad1836.c b/sound/soc/codecs/ad1836.c
index 78d38cb62c05..4390d4630de5 100644
--- a/sound/soc/codecs/ad1836.c
+++ b/sound/soc/codecs/ad1836.c
@@ -124,6 +124,13 @@ static const struct snd_soc_dapm_route ad183x_dapm_routes[] = {
{ "ADC", NULL, "ADC_PWR" },
};
+static const DECLARE_TLV_DB_SCALE(ad1836_in_tlv, 0, 300, 0);
+
+static const struct snd_kcontrol_new ad1836_controls[] = {
+ SOC_DOUBLE_TLV("ADC2 Capture Volume", AD183X_ADC_CTRL1, 3, 0, 4, 0,
+ ad1836_in_tlv),
+};
+
/*
* DAI ops entries
*/
@@ -280,6 +287,10 @@ static int ad1836_probe(struct snd_soc_codec *codec)
if (ad1836->type == AD1836) {
/* left/right diff:PGA/MUX */
snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);
+ ret = snd_soc_add_controls(codec, ad1836_controls,
+ ARRAY_SIZE(ad1836_controls));
+ if (ret)
+ return ret;
} else {
snd_soc_write(codec, AD1836_ADC_CTRL3, 0x00);
}