ASoC: dapm: Add a helper to get the CODEC for DAPM kcontrol

We use the same 3 lines to get the CODEC for a kcontrol in a quite a few places.
This patch puts them into a common helper function. Having this encapsulated in
a helper function will also make it more easier to eventually change the data
layout of the kcontrol's private data.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
index 1325c0c..fec0db0 100644
--- a/sound/soc/codecs/tlv320aic3x.c
+++ b/sound/soc/codecs/tlv320aic3x.c
@@ -138,8 +138,7 @@
 static int snd_soc_dapm_put_volsw_aic3x(struct snd_kcontrol *kcontrol,
 					struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-	struct snd_soc_dapm_widget *widget = wlist->widgets[0];
+	struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
 	struct soc_mixer_control *mc =
 		(struct soc_mixer_control *)kcontrol->private_value;
 	unsigned int reg = mc->reg;
@@ -165,14 +164,14 @@
 	mask <<= shift;
 	val <<= shift;
 
-	change = snd_soc_test_bits(widget->codec, val, mask, reg);
+	change = snd_soc_test_bits(codec, val, mask, reg);
 	if (change) {
 		update.kcontrol = kcontrol;
 		update.reg = reg;
 		update.mask = mask;
 		update.val = val;
 
-		snd_soc_dapm_mixer_update_power(widget->dapm, kcontrol, connect,
+		snd_soc_dapm_mixer_update_power(&codec->dapm, kcontrol, connect,
 			&update);
 	}
 
diff --git a/sound/soc/codecs/twl6040.c b/sound/soc/codecs/twl6040.c
index 44621dd..d6c5bf1 100644
--- a/sound/soc/codecs/twl6040.c
+++ b/sound/soc/codecs/twl6040.c
@@ -437,9 +437,7 @@
 static int twl6040_soc_dapm_put_vibra_enum(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-	struct snd_soc_dapm_widget *widget = wlist->widgets[0];
-	struct snd_soc_codec *codec = widget->codec;
+	struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
 	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
 	unsigned int val;
 
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c
index fa24ced..eebcb1d 100644
--- a/sound/soc/codecs/wm8903.c
+++ b/sound/soc/codecs/wm8903.c
@@ -364,9 +364,7 @@
 static int wm8903_class_w_put(struct snd_kcontrol *kcontrol,
 			      struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-	struct snd_soc_dapm_widget *widget = wlist->widgets[0];
-	struct snd_soc_codec *codec = widget->codec;
+	struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
 	struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec);
 	u16 reg;
 	int ret;
diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index ba832b7..eee2a01 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -1437,9 +1437,7 @@
 static int wm8994_put_class_w(struct snd_kcontrol *kcontrol,
 			      struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-	struct snd_soc_dapm_widget *w = wlist->widgets[0];
-	struct snd_soc_codec *codec = w->codec;
+	struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
 	int ret;
 
 	ret = snd_soc_dapm_put_volsw(kcontrol, ucontrol);
diff --git a/sound/soc/codecs/wm8995.c b/sound/soc/codecs/wm8995.c
index 90a65c4..da2899e6 100644
--- a/sound/soc/codecs/wm8995.c
+++ b/sound/soc/codecs/wm8995.c
@@ -549,12 +549,9 @@
 static int wm8995_put_class_w(struct snd_kcontrol *kcontrol,
 			      struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-	struct snd_soc_dapm_widget *w = wlist->widgets[0];
-	struct snd_soc_codec *codec;
+	struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
 	int ret;
 
-	codec = w->codec;
 	ret = snd_soc_dapm_put_volsw(kcontrol, ucontrol);
 	wm8995_update_class_w(codec);
 	return ret;
diff --git a/sound/soc/codecs/wm_hubs.c b/sound/soc/codecs/wm_hubs.c
index 2d9e099..8b50e59 100644
--- a/sound/soc/codecs/wm_hubs.c
+++ b/sound/soc/codecs/wm_hubs.c
@@ -699,9 +699,7 @@
 static int class_w_put_volsw(struct snd_kcontrol *kcontrol,
 			      struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-	struct snd_soc_dapm_widget *widget = wlist->widgets[0];
-	struct snd_soc_codec *codec = widget->codec;
+	struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
 	int ret;
 
 	ret = snd_soc_dapm_put_volsw(kcontrol, ucontrol);
@@ -721,9 +719,7 @@
 static int class_w_put_double(struct snd_kcontrol *kcontrol,
 			      struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
-	struct snd_soc_dapm_widget *widget = wlist->widgets[0];
-	struct snd_soc_codec *codec = widget->codec;
+	struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
 	int ret;
 
 	ret = snd_soc_dapm_put_enum_double(kcontrol, ucontrol);