diff --git a/sound/firewire/motu/motu-protocol-v2.c b/sound/firewire/motu/motu-protocol-v2.c
index 26534ed97fbc..e2913cb54da8 100644
--- a/sound/firewire/motu/motu-protocol-v2.c
+++ b/sound/firewire/motu/motu-protocol-v2.c
@@ -296,13 +296,9 @@ int snd_motu_protocol_v2_cache_packet_formats(struct snd_motu *motu)
 	return 0;
 }
 
-static const struct snd_motu_protocol snd_motu_protocol_v2 = {
-};
-
 const struct snd_motu_spec snd_motu_spec_828mk2 = {
 	.name = "828mk2",
 	.protocol_version = SND_MOTU_PROTOCOL_V2,
-	.protocol = &snd_motu_protocol_v2,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_TX_MICINST_CHUNK |
 		 SND_MOTU_SPEC_TX_RETURN_CHUNK |
@@ -317,7 +313,6 @@ const struct snd_motu_spec snd_motu_spec_828mk2 = {
 
 const struct snd_motu_spec snd_motu_spec_traveler = {
 	.name = "Traveler",
-	.protocol = &snd_motu_protocol_v2,
 	.protocol_version = SND_MOTU_PROTOCOL_V2,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_SUPPORT_CLOCK_X4 |
@@ -334,7 +329,6 @@ const struct snd_motu_spec snd_motu_spec_traveler = {
 const struct snd_motu_spec snd_motu_spec_ultralite = {
 	.name = "UltraLite",
 	.protocol_version = SND_MOTU_PROTOCOL_V2,
-	.protocol = &snd_motu_protocol_v2,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_TX_MICINST_CHUNK | // padding.
 		 SND_MOTU_SPEC_TX_RETURN_CHUNK |
@@ -348,7 +342,6 @@ const struct snd_motu_spec snd_motu_spec_ultralite = {
 const struct snd_motu_spec snd_motu_spec_8pre = {
 	.name = "8pre",
 	.protocol_version = SND_MOTU_PROTOCOL_V2,
-	.protocol = &snd_motu_protocol_v2,
 	// In tx, use coax chunks for mix-return 1/2. In rx, use coax chunks for
 	// dummy 1/2.
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
diff --git a/sound/firewire/motu/motu-protocol-v3.c b/sound/firewire/motu/motu-protocol-v3.c
index d8b42d28304a..8192bcdd1b37 100644
--- a/sound/firewire/motu/motu-protocol-v3.c
+++ b/sound/firewire/motu/motu-protocol-v3.c
@@ -310,13 +310,10 @@ int snd_motu_protocol_v3_cache_packet_formats(struct snd_motu *motu)
 	return 0;
 }
 
-static const struct snd_motu_protocol snd_motu_protocol_v3 = {
-};
 
 const struct snd_motu_spec snd_motu_spec_828mk3 = {
 	.name = "828mk3",
 	.protocol_version = SND_MOTU_PROTOCOL_V3,
-	.protocol = &snd_motu_protocol_v3,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_SUPPORT_CLOCK_X4 |
 		 SND_MOTU_SPEC_TX_MICINST_CHUNK |
@@ -335,7 +332,6 @@ const struct snd_motu_spec snd_motu_spec_828mk3 = {
 const struct snd_motu_spec snd_motu_spec_audio_express = {
 	.name = "AudioExpress",
 	.protocol_version = SND_MOTU_PROTOCOL_V3,
-	.protocol = &snd_motu_protocol_v3,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_TX_MICINST_CHUNK |
 		 SND_MOTU_SPEC_TX_RETURN_CHUNK |
@@ -349,7 +345,6 @@ const struct snd_motu_spec snd_motu_spec_audio_express = {
 const struct snd_motu_spec snd_motu_spec_4pre = {
 	.name = "4pre",
 	.protocol_version = SND_MOTU_PROTOCOL_V3,
-	.protocol = &snd_motu_protocol_v3,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_TX_MICINST_CHUNK |
 		 SND_MOTU_SPEC_TX_RETURN_CHUNK |
diff --git a/sound/firewire/motu/motu.h b/sound/firewire/motu/motu.h
index d59841677596..f8274ed94766 100644
--- a/sound/firewire/motu/motu.h
+++ b/sound/firewire/motu/motu.h
@@ -113,15 +113,6 @@ enum snd_motu_protocol_version {
 	SND_MOTU_PROTOCOL_V3,
 };
 
-struct snd_motu_protocol {
-	int (*get_clock_rate)(struct snd_motu *motu, unsigned int *rate);
-	int (*set_clock_rate)(struct snd_motu *motu, unsigned int rate);
-	int (*get_clock_source)(struct snd_motu *motu,
-				enum snd_motu_clock_source *source);
-	int (*switch_fetching_mode)(struct snd_motu *motu, bool enable);
-	int (*cache_packet_formats)(struct snd_motu *motu);
-};
-
 struct snd_motu_spec {
 	const char *const name;
 	enum snd_motu_protocol_version protocol_version;
@@ -129,8 +120,6 @@ struct snd_motu_spec {
 
 	unsigned char analog_in_ports;
 	unsigned char analog_out_ports;
-
-	const struct snd_motu_protocol *const protocol;
 };
 
 extern const struct snd_motu_spec snd_motu_spec_828mk2;