--- zzzz-none-000/linux-3.10.107/arch/mips/include/asm/mach-lantiq/lantiq.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/mips/include/asm/mach-lantiq/lantiq.h	2021-02-04 17:41:59.000000000 +0000
@@ -48,6 +48,8 @@
 extern unsigned char ltq_boot_select(void);
 /* find out what caused the last cpu reset */
 extern int ltq_reset_cause(void);
+/* find out the soc type */
+extern int ltq_soc_type(void);
 
 #define IOPORT_RESOURCE_START	0x10000000
 #define IOPORT_RESOURCE_END	0xffffffff