linux-kernel - [PATCH] ASoC: fix deemphasis control in wm8904/55/60 codecs

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Date:	Wed,  8 Dec 2010 23:36:17 +0300
From:	Dmitry Artamonow <mad_soft@...ox.ru>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Liam Girdwood <lrg@...mlogic.co.uk>, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: fix deemphasis control in wm8904/55/60 codecs

Deemphasis control's .get callback should update control's value instead
of returning it - return value of callback function is used for indicating
error or success of operation.

Signed-off-by: Dmitry Artamonow <mad_soft@...ox.ru>
---
I discovered this while trying to adapt this deemphasis code to ak4641 codec.

 sound/soc/codecs/wm8904.c |    3 ++-
 sound/soc/codecs/wm8955.c |    3 ++-
 sound/soc/codecs/wm8960.c |    3 ++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/wm8904.c b/sound/soc/codecs/wm8904.c
index fca60a0..9001cc4 100644
--- a/sound/soc/codecs/wm8904.c
+++ b/sound/soc/codecs/wm8904.c
@@ -818,7 +818,8 @@ static int wm8904_get_deemph(struct snd_kcontrol *kcontrol,
 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct wm8904_priv *wm8904 = snd_soc_codec_get_drvdata(codec);
 
-	return wm8904->deemph;
+	ucontrol->value.enumerated.item[0] = wm8904->deemph;
+	return 0;
 }
 
 static int wm8904_put_deemph(struct snd_kcontrol *kcontrol,
diff --git a/sound/soc/codecs/wm8955.c b/sound/soc/codecs/wm8955.c
index f89ad6c..9cbab8e 100644
--- a/sound/soc/codecs/wm8955.c
+++ b/sound/soc/codecs/wm8955.c
@@ -380,7 +380,8 @@ static int wm8955_get_deemph(struct snd_kcontrol *kcontrol,
 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
 
-	return wm8955->deemph;
+	ucontrol->value.enumerated.item[0] = wm8955->deemph;
+	return 0;
 }
 
 static int wm8955_put_deemph(struct snd_kcontrol *kcontrol,
diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c
index 8d5efb3..21986c4 100644
--- a/sound/soc/codecs/wm8960.c
+++ b/sound/soc/codecs/wm8960.c
@@ -138,7 +138,8 @@ static int wm8960_get_deemph(struct snd_kcontrol *kcontrol,
 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 	struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
 
-	return wm8960->deemph;
+	ucontrol->value.enumerated.item[0] = wm8960->deemph;
+	return 0;
 }
 
 static int wm8960_put_deemph(struct snd_kcontrol *kcontrol,
-- 
1.7.0.4

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