diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 6de31739b45c..98c5d413209e 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -613,6 +613,10 @@ int gpmc_cs_configure(int cs, int cmd, int wval)
 
 	case GPMC_CONFIG_DEV_TYPE:
 		regval  = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
+		/* clear 4 target bits */
+		regval &= ~(GPMC_CONFIG1_DEVICETYPE(3) |
+			    GPMC_CONFIG1_MUXTYPE(3));
+		/* set the proper value */
 		regval |= GPMC_CONFIG1_DEVICETYPE(wval);
 		if (wval == GPMC_DEVICETYPE_NOR)
 			regval |= GPMC_CONFIG1_MUXADDDATA;
diff --git a/arch/arm/mach-omap2/gpmc.h b/arch/arm/mach-omap2/gpmc.h
index fe0a844d5007..f79cbde76738 100644
--- a/arch/arm/mach-omap2/gpmc.h
+++ b/arch/arm/mach-omap2/gpmc.h
@@ -58,7 +58,10 @@
 #define GPMC_CONFIG1_DEVICESIZE_16      GPMC_CONFIG1_DEVICESIZE(1)
 #define GPMC_CONFIG1_DEVICETYPE(val)    ((val & 3) << 10)
 #define GPMC_CONFIG1_DEVICETYPE_NOR     GPMC_CONFIG1_DEVICETYPE(0)
-#define GPMC_CONFIG1_MUXADDDATA         (1 << 9)
+#define GPMC_CONFIG1_MUXTYPE(val)       ((val & 3) << 8)
+#define GPMC_CONFIG1_MUXNONMUX          GPMC_CONFIG1_MUXTYPE(0)
+#define GPMC_CONFIG1_MUXAAD             GPMC_CONFIG1_MUXTYPE(1)
+#define GPMC_CONFIG1_MUXADDDATA         GPMC_CONFIG1_MUXTYPE(2)
 #define GPMC_CONFIG1_TIME_PARA_GRAN     (1 << 4)
 #define GPMC_CONFIG1_FCLK_DIV(val)      (val & 3)
 #define GPMC_CONFIG1_FCLK_DIV2          (GPMC_CONFIG1_FCLK_DIV(1))