diff --git a/arch/arm/mach-rockchip/rk3528/rk3528.c b/arch/arm/mach-rockchip/rk3528/rk3528.c
index f9bfc445b85..57ead0006f1 100644
--- a/arch/arm/mach-rockchip/rk3528/rk3528.c
+++ b/arch/arm/mach-rockchip/rk3528/rk3528.c
@@ -49,6 +49,21 @@ void board_debug_uart_init(void)
 {
 }
 
+u32 read_brom_bootsource_id(void)
+{
+	u32 bootsource_id = readl(BROM_BOOTSOURCE_ID_ADDR);
+
+	/* Re-map the raw value read from reg to an existing BROM_BOOTSOURCE
+	 * enum value to avoid having to create a larger boot_devices table.
+	 */
+	if (bootsource_id == 0x81)
+		return BROM_BOOTSOURCE_USB;
+	else if (bootsource_id > BROM_LAST_BOOTSOURCE)
+		log_debug("Unknown bootsource %x\n", bootsource_id);
+
+	return bootsource_id;
+}
+
 int arch_cpu_init(void)
 {
 	u32 val;