diff --git a/arch/arm/cpu/armv7/omap-common/spl.c b/arch/arm/cpu/armv7/omap-common/spl.c
index 01fd58a..d0866c0 100644
--- a/arch/arm/cpu/armv7/omap-common/spl.c
+++ b/arch/arm/cpu/armv7/omap-common/spl.c
@@ -160,3 +160,11 @@
 	omap_rev_string(rev_string_buffer);
 	printf("Texas Instruments %s\n", rev_string_buffer);
 }
+
+void __omap_rev_string(char *str)
+{
+	sprintf(str, "Revision detection unimplemented");
+}
+
+void omap_rev_string(char *str)
+	__attribute__((weak, alias("__omap_rev_string")));
diff --git a/arch/arm/cpu/armv7/omap3/board.c b/arch/arm/cpu/armv7/omap3/board.c
index 1b3ef69..a9fdb4f 100644
--- a/arch/arm/cpu/armv7/omap3/board.c
+++ b/arch/arm/cpu/armv7/omap3/board.c
@@ -450,9 +450,3 @@
 	dcache_enable();
 }
 #endif
-
-void omap_rev_string(char *omap_rev_string)
-{
-	sprintf(omap_rev_string, "OMAP3, sorry revision detection" \
-		" unimplemented");
-}
diff --git a/arch/arm/include/asm/arch-omap3/sys_proto.h b/arch/arm/include/asm/arch-omap3/sys_proto.h
index 7b60051..995e7cb 100644
--- a/arch/arm/include/asm/arch-omap3/sys_proto.h
+++ b/arch/arm/include/asm/arch-omap3/sys_proto.h
@@ -71,5 +71,4 @@
 void dieid_num_r(void);
 void do_omap3_emu_romcode_call(u32 service_id, u32 parameters);
 void omap3_gp_romcode_call(u32 service_id, u32 parameter);
-void omap_rev_string(char *omap_rev_string);
 #endif
diff --git a/arch/arm/include/asm/arch-omap4/sys_proto.h b/arch/arm/include/asm/arch-omap4/sys_proto.h
index a81f8e5..1aacbb1 100644
--- a/arch/arm/include/asm/arch-omap4/sys_proto.h
+++ b/arch/arm/include/asm/arch-omap4/sys_proto.h
@@ -43,7 +43,6 @@
 u32 wait_on_value(u32, u32, void *, u32);
 void sdelay(unsigned long);
 void set_pl310_ctrl_reg(u32 val);
-void omap_rev_string(char *omap4_rev_string);
 void setup_clocks_for_console(void);
 void prcm_init(void);
 void bypass_dpll(u32 *const base);
diff --git a/arch/arm/include/asm/omap_common.h b/arch/arm/include/asm/omap_common.h
index 66d6b71..3f2f004 100644
--- a/arch/arm/include/asm/omap_common.h
+++ b/arch/arm/include/asm/omap_common.h
@@ -77,6 +77,7 @@
 
 /* SPL common function s*/
 void spl_parse_image_header(const struct image_header *header);
+void omap_rev_string(char *omap_rev_string);
 
 /* NAND SPL functions */
 void spl_nand_load_image(void);