diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/setup.c b/target/linux/ar71xx/files/arch/mips/ar71xx/setup.c
index ba3ef3ea09..e12fdbf54c 100644
--- a/target/linux/ar71xx/files/arch/mips/ar71xx/setup.c
+++ b/target/linux/ar71xx/files/arch/mips/ar71xx/setup.c
@@ -44,6 +44,9 @@ EXPORT_SYMBOL_GPL(ar71xx_ref_freq);
 enum ar71xx_soc_type ar71xx_soc;
 EXPORT_SYMBOL_GPL(ar71xx_soc);
 
+u32 ar71xx_soc_rev;
+EXPORT_SYMBOL_GPL(ar71xx_soc_rev);
+
 static char ar71xx_sys_type[AR71XX_SYS_TYPE_LEN];
 
 static void ar71xx_restart(char *command)
@@ -171,6 +174,8 @@ static void __init ar71xx_detect_sys_type(void)
 		panic("ar71xx: unknown chip id:0x%08x\n", id);
 	}
 
+	ar71xx_soc_rev = rev;
+
 	sprintf(ar71xx_sys_type, "Atheros AR%s rev %u", chip, rev);
 	pr_info("SoC: %s\n", ar71xx_sys_type);
 }
diff --git a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h
index 7c99dba665..a001f89dbc 100644
--- a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h
+++ b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h
@@ -138,6 +138,7 @@ enum ar71xx_soc_type {
 	AR71XX_SOC_AR9342,
 	AR71XX_SOC_AR9344,
 };
+extern u32 ar71xx_soc_rev;
 
 extern enum ar71xx_soc_type ar71xx_soc;