ASoC: twl6040: Combine the custom volsw get, and put functions

We can manage with one set of get, and put function for the gain
controls we need to handle with custom code due to the shadowing
of the register.
For both get, and put function we can call decide based on the
mc->rreg value, if we need to call the volsw, or the vlosw_2r
variant (in 2r case rreg is not 0).
Handling of the shadow values are the same for both type of
controls.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/twl6040.c

@@ -763,15 +763,17 @@ static int twl6040_put_volsw(struct snd_kcontrol *kcontrol,
 	struct soc_mixer_control *mc =
 		(struct soc_mixer_control *)kcontrol->private_value;
 	int ret;
-	unsigned int reg = mc->reg;
 
 	/* For HS and HF we shadow the values and only actually write
 	 * them out when active in order to ensure the amplifier comes on
 	 * as quietly as possible. */
-	switch (reg) {
+	switch (mc->reg) {
 	case TWL6040_REG_HSGAIN:
 		out = &twl6040_priv->headset;
 		break;
+	case TWL6040_REG_HFLGAIN:
+		out = &twl6040_priv->handsfree;
+		break;
 	default:
 		break;
 	}
@@ -783,7 +785,12 @@ static int twl6040_put_volsw(struct snd_kcontrol *kcontrol,
 			return 1;
 	}
 
-	ret = snd_soc_put_volsw(kcontrol, ucontrol);
+	/* call the appropriate handler depending on the rreg */
+	if (mc->rreg)
+		ret = snd_soc_put_volsw_2r(kcontrol, ucontrol);
+	else
+		ret = snd_soc_put_volsw(kcontrol, ucontrol);
+
 	if (ret < 0)
 		return ret;
 
@@ -798,39 +805,12 @@ static int twl6040_get_volsw(struct snd_kcontrol *kcontrol,
 	struct twl6040_output *out = &twl6040_priv->headset;
 	struct soc_mixer_control *mc =
 		(struct soc_mixer_control *)kcontrol->private_value;
-	unsigned int reg = mc->reg;
 
-	switch (reg) {
+	switch (mc->reg) {
 	case TWL6040_REG_HSGAIN:
 		out = &twl6040_priv->headset;
-		ucontrol->value.integer.value[0] = out->left_vol;
-		ucontrol->value.integer.value[1] = out->right_vol;
-		return 0;
-
-	default:
 		break;
-	}
-
-	return snd_soc_get_volsw(kcontrol, ucontrol);
-}
-
-static int twl6040_put_volsw_2r_vu(struct snd_kcontrol *kcontrol,
-				  struct snd_ctl_elem_value *ucontrol)
-{
-	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
-	struct twl6040_data *twl6040_priv = snd_soc_codec_get_drvdata(codec);
-	struct twl6040_output *out = NULL;
-	struct soc_mixer_control *mc =
-		(struct soc_mixer_control *)kcontrol->private_value;
-	int ret;
-	unsigned int reg = mc->reg;
-
-	/* For HS and HF we shadow the values and only actually write
-	 * them out when active in order to ensure the amplifier comes on
-	 * as quietly as possible. */
-	switch (reg) {
 	case TWL6040_REG_HFLGAIN:
-	case TWL6040_REG_HFRGAIN:
 		out = &twl6040_priv->handsfree;
 		break;
 	default:
@@ -838,43 +818,16 @@ static int twl6040_put_volsw_2r_vu(struct snd_kcontrol *kcontrol,
 	}
 
 	if (out) {
-		out->left_vol = ucontrol->value.integer.value[0];
-		out->right_vol = ucontrol->value.integer.value[1];
-		if (!out->active)
-			return 1;
-	}
-
-	ret = snd_soc_put_volsw_2r(kcontrol, ucontrol);
-	if (ret < 0)
-		return ret;
-
-	return 1;
-}
-
-static int twl6040_get_volsw_2r(struct snd_kcontrol *kcontrol,
-				struct snd_ctl_elem_value *ucontrol)
-{
-	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
-	struct twl6040_data *twl6040_priv = snd_soc_codec_get_drvdata(codec);
-	struct twl6040_output *out = &twl6040_priv->handsfree;
-	struct soc_mixer_control *mc =
-		(struct soc_mixer_control *)kcontrol->private_value;
-	unsigned int reg = mc->reg;
-
-	/* If these are cached registers use the cache */
-	switch (reg) {
-	case TWL6040_REG_HFLGAIN:
-	case TWL6040_REG_HFRGAIN:
-		out = &twl6040_priv->handsfree;
 		ucontrol->value.integer.value[0] = out->left_vol;
 		ucontrol->value.integer.value[1] = out->right_vol;
 		return 0;
-
-	default:
-		break;
 	}
 
-	return snd_soc_get_volsw_2r(kcontrol, ucontrol);
+	/* call the appropriate handler depending on the rreg */
+	if (mc->rreg)
+		return snd_soc_get_volsw_2r(kcontrol, ucontrol);
+	else
+		return snd_soc_get_volsw(kcontrol, ucontrol);
 }
 
 /* double control with volume update */
@@ -899,7 +852,7 @@ static int twl6040_get_volsw_2r(struct snd_kcontrol *kcontrol,
 		SNDRV_CTL_ELEM_ACCESS_VOLATILE, \
 	.tlv.p = (tlv_array), \
 	.info = snd_soc_info_volsw_2r, \
-	.get = twl6040_get_volsw_2r, .put = twl6040_put_volsw_2r_vu, \
+	.get = twl6040_get_volsw, .put = twl6040_put_volsw, \
 	.private_value = (unsigned long)&(struct soc_mixer_control) \
 		{.reg = reg_left, .rreg = reg_right, .shift = xshift, \
 		 .rshift = xshift, .max = xmax, .invert = xinvert}, }