diff --git a/board/rockchip/tinker_rk3288/MAINTAINERS b/board/rockchip/tinker_rk3288/MAINTAINERS
index cddceaf..ed5de68 100644
--- a/board/rockchip/tinker_rk3288/MAINTAINERS
+++ b/board/rockchip/tinker_rk3288/MAINTAINERS
@@ -4,3 +4,10 @@
 F:	board/rockchip/tinker_rk3288
 F:	include/configs/tinker_rk3288.h
 F:	configs/tinker-rk3288_defconfig
+
+TINKER-S-RK3288
+M:	Michael Trimarchi <michael@amarulasolutions.com>
+S:	Maintained
+F:	board/rockchip/tinker_rk3288
+F:	include/configs/tinker_rk3288.h
+F:	configs/tinker-s-rk3288_defconfig
diff --git a/board/rockchip/tinker_rk3288/tinker-rk3288.c b/board/rockchip/tinker_rk3288/tinker-rk3288.c
index 6c76c3c..7a0c3c9 100644
--- a/board/rockchip/tinker_rk3288/tinker-rk3288.c
+++ b/board/rockchip/tinker_rk3288/tinker-rk3288.c
@@ -8,6 +8,8 @@
 #include <env.h>
 #include <i2c_eeprom.h>
 #include <netdev.h>
+#include <asm/arch-rockchip/bootrom.h>
+#include <asm/io.h>
 
 static int get_ethaddr_from_eeprom(u8 *addr)
 {
@@ -33,3 +35,13 @@
 
 	return 0;
 }
+
+int mmc_get_env_dev(void)
+{
+	u32 bootdevice_brom_id = readl(BROM_BOOTSOURCE_ID_ADDR);
+
+	if (bootdevice_brom_id == BROM_BOOTSOURCE_EMMC)
+		return 0;
+
+	return 1;
+}