diff --git a/arch/arm/dts/imx53-pinfunc.h b/arch/arm/dts/imx53-pinfunc.h
index aec406b..baf710d 100644
--- a/arch/arm/dts/imx53-pinfunc.h
+++ b/arch/arm/dts/imx53-pinfunc.h
@@ -10,6 +10,7 @@
 #ifndef __DTS_IMX53_PINFUNC_H
 #define __DTS_IMX53_PINFUNC_H
 
+#define IMX_PAD_SION       0x40000000
 /*
  * The pin function ID is a tuple of
  * <mux_reg conf_reg input_reg mux_mode input_val>