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authorDaniel Mack <zonque@gmail.com>2013-03-07 01:22:16 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-03-07 06:37:38 +0400
commitb692a436e1dc7227f2b7cf447797c3dc6ece5c29 (patch)
treead011568ff8a232bbd1c1bff8ccc10cc55402d9e /sound/soc/codecs/ak4104.c
parentb0ec761b99291f3c0f28ac370f94c145ec806095 (diff)
downloadlinux-b692a436e1dc7227f2b7cf447797c3dc6ece5c29.tar.xz
ASoC: ak4104: correct tranceiver enable handling
Move the enabling of the TX diode to hw_params() and disable it again in hw_free(). This way, the diode is only switched on as long as it needs to be. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/codecs/ak4104.c')
-rw-r--r--sound/soc/codecs/ak4104.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/sound/soc/codecs/ak4104.c b/sound/soc/codecs/ak4104.c
index 58f390d3ea7a..c7cfdf957e4d 100644
--- a/sound/soc/codecs/ak4104.c
+++ b/sound/soc/codecs/ak4104.c
@@ -93,7 +93,7 @@ static int ak4104_hw_params(struct snd_pcm_substream *substream,
{
struct snd_soc_codec *codec = dai->codec;
struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
- int val = 0;
+ int ret, val = 0;
/* set the IEC958 bits: consumer mode, no copyright bit */
val |= IEC958_AES0_CON_NOT_COPYRIGHT;
@@ -134,11 +134,33 @@ static int ak4104_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}
- return regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val);
+ ret = regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val);
+ if (ret < 0)
+ return ret;
+
+ /* enable transmitter */
+ ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
+ AK4104_TX_TXE, AK4104_TX_TXE);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int ak4104_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
+
+ /* disable transmitter */
+ return regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
+ AK4104_TX_TXE, 0);
}
static const struct snd_soc_dai_ops ak4101_dai_ops = {
.hw_params = ak4104_hw_params,
+ .hw_free = ak4104_hw_free,
.set_fmt = ak4104_set_dai_fmt,
};