diff --git a/arch/m68k/atari/ataints.c b/arch/m68k/atari/ataints.c
index 56f02ea2c248..23256434191c 100644
--- a/arch/m68k/atari/ataints.c
+++ b/arch/m68k/atari/ataints.c
@@ -52,6 +52,7 @@
 #include <asm/entry.h>
 #include <asm/io.h>
 
+#include "atari.h"
 
 /*
  * Atari interrupt handling scheme:
@@ -81,8 +82,6 @@ __ALIGN_STR "\n\t"
 	"orw	#0x200,%sp@\n\t"	/* set saved ipl to 2 */
 	"rte");
 
-extern void atari_microwire_cmd(int cmd);
-
 static unsigned int atari_irq_startup(struct irq_data *data)
 {
 	unsigned int irq = data->irq;
diff --git a/arch/m68k/atari/atari.h b/arch/m68k/atari/atari.h
new file mode 100644
index 000000000000..494a03ddac3d
--- /dev/null
+++ b/arch/m68k/atari/atari.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+struct rtc_time;
+
+/* ataints.c */
+void atari_init_IRQ(void);
+
+/* atasound.c */
+void atari_microwire_cmd(int cmd);
+void atari_mksound(unsigned int hz, unsigned int ticks);
+
+/* time.c */
+void atari_sched_init(void);
+int atari_mste_hwclk(int op, struct rtc_time *t);
+int atari_tt_hwclk(int op, struct rtc_time *t);
diff --git a/arch/m68k/atari/atasound.c b/arch/m68k/atari/atasound.c
index a8724d998c39..c38ef0e6078e 100644
--- a/arch/m68k/atari/atasound.c
+++ b/arch/m68k/atari/atasound.c
@@ -28,6 +28,7 @@
 #include <asm/irq.h>
 #include <asm/atariints.h>
 
+#include "atari.h"
 
 /*
  * stuff from the old atasound.c
diff --git a/arch/m68k/atari/config.c b/arch/m68k/atari/config.c
index b4fe4273ad91..b48a0606a000 100644
--- a/arch/m68k/atari/config.c
+++ b/arch/m68k/atari/config.c
@@ -48,6 +48,8 @@
 #include <asm/io.h>
 #include <asm/config.h>
 
+#include "atari.h"
+
 u_long atari_mch_cookie;
 EXPORT_SYMBOL(atari_mch_cookie);
 
@@ -69,19 +71,10 @@ int atari_rtc_year_offset;
 static void atari_reset(void);
 static void atari_get_model(char *model);
 static void atari_get_hardware_list(struct seq_file *m);
-
-/* atari specific irq functions */
-extern void atari_init_IRQ (void);
-extern void atari_mksound(unsigned int count, unsigned int ticks);
 #ifdef CONFIG_HEARTBEAT
 static void atari_heartbeat(int on);
 #endif
 
-/* atari specific timer functions (in time.c) */
-extern void atari_sched_init(void);
-extern int atari_mste_hwclk (int, struct rtc_time *);
-extern int atari_tt_hwclk (int, struct rtc_time *);
-
 /* ++roman: This is a more elaborate test for an SCC chip, since the plain
  * Medusa board generates DTACK at the SCC's standard addresses, but a SCC
  * board in the Medusa is possible. Also, the addresses where the ST_ESCC
diff --git a/arch/m68k/atari/time.c b/arch/m68k/atari/time.c
index 7e44d0e9d0f8..3453c6dc6b41 100644
--- a/arch/m68k/atari/time.c
+++ b/arch/m68k/atari/time.c
@@ -23,6 +23,8 @@
 #include <asm/atariints.h>
 #include <asm/machdep.h>
 
+#include "atari.h"
+
 DEFINE_SPINLOCK(rtc_lock);
 EXPORT_SYMBOL_GPL(rtc_lock);