ALSA: i2c: use snd_kcontrol_chip()

We can use snd_kcontrol_chip(). Let's use it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/87tt5xaudu.wl-kuninori.morimoto.gx@renesas.com

Author: morimoto

sound/i2c/other/pt2258.c

@@ -80,7 +80,7 @@ static int pt2258_stereo_volume_info(struct snd_kcontrol *kcontrol,
 static int pt2258_stereo_volume_get(struct snd_kcontrol *kcontrol,
 				    struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_pt2258 *pt = kcontrol->private_data;
+	struct snd_pt2258 *pt = snd_kcontrol_chip(kcontrol);
 	int base = kcontrol->private_value;
 
 	/* chip does not support register reads */
@@ -92,7 +92,7 @@ static int pt2258_stereo_volume_get(struct snd_kcontrol *kcontrol,
 static int pt2258_stereo_volume_put(struct snd_kcontrol *kcontrol,
 				    struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_pt2258 *pt = kcontrol->private_data;
+	struct snd_pt2258 *pt = snd_kcontrol_chip(kcontrol);
 	int base = kcontrol->private_value;
 	unsigned char bytes[2];
 	int val0, val1;
@@ -133,7 +133,7 @@ static int pt2258_stereo_volume_put(struct snd_kcontrol *kcontrol,
 static int pt2258_switch_get(struct snd_kcontrol *kcontrol,
 			     struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_pt2258 *pt = kcontrol->private_data;
+	struct snd_pt2258 *pt = snd_kcontrol_chip(kcontrol);
 
 	ucontrol->value.integer.value[0] = !pt->mute;
 	return 0;
@@ -142,7 +142,7 @@ static int pt2258_switch_get(struct snd_kcontrol *kcontrol,
 static int pt2258_switch_put(struct snd_kcontrol *kcontrol,
 			     struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_pt2258 *pt = kcontrol->private_data;
+	struct snd_pt2258 *pt = snd_kcontrol_chip(kcontrol);
 	unsigned char bytes[2];
 	int val;