diff --git a/arch/arm/plat-mxc/devices/platform-mxc-mmc.c b/arch/arm/plat-mxc/devices/platform-mxc-mmc.c
index 953319e..90d762f 100644
--- a/arch/arm/plat-mxc/devices/platform-mxc-mmc.c
+++ b/arch/arm/plat-mxc/devices/platform-mxc-mmc.c
@@ -9,20 +9,21 @@
 #include <mach/hardware.h>
 #include <mach/devices-common.h>
 
-#define imx_mxc_mmc_data_entry_single(soc, _id, _hwid)			\
+#define imx_mxc_mmc_data_entry_single(soc, _id, _hwid, _size)		\
 	{								\
 		.id = _id,						\
 		.iobase = soc ## _SDHC ## _hwid ## _BASE_ADDR,		\
+		.iosize = _size,					\
 		.irq = soc ## _INT_SDHC ## _hwid,			\
 		.dmareq = soc ## _DMA_REQ_SDHC ## _hwid,		\
 	}
-#define imx_mxc_mmc_data_entry(soc, _id, _hwid)				\
-	[_id] = imx_mxc_mmc_data_entry_single(soc, _id, _hwid)
+#define imx_mxc_mmc_data_entry(soc, _id, _hwid, _size)			\
+	[_id] = imx_mxc_mmc_data_entry_single(soc, _id, _hwid, _size)
 
 #ifdef CONFIG_SOC_IMX21
 const struct imx_mxc_mmc_data imx21_mxc_mmc_data[] __initconst = {
 #define imx21_mxc_mmc_data_entry(_id, _hwid)				\
-	imx_mxc_mmc_data_entry(MX21, _id, _hwid)
+	imx_mxc_mmc_data_entry(MX21, _id, _hwid, SZ_4K)
 	imx21_mxc_mmc_data_entry(0, 1),
 	imx21_mxc_mmc_data_entry(1, 2),
 };
@@ -31,12 +32,21 @@
 #ifdef CONFIG_SOC_IMX27
 const struct imx_mxc_mmc_data imx27_mxc_mmc_data[] __initconst = {
 #define imx27_mxc_mmc_data_entry(_id, _hwid)				\
-	imx_mxc_mmc_data_entry(MX27, _id, _hwid)
+	imx_mxc_mmc_data_entry(MX27, _id, _hwid, SZ_4K)
 	imx27_mxc_mmc_data_entry(0, 1),
 	imx27_mxc_mmc_data_entry(1, 2),
 };
 #endif /* ifdef CONFIG_SOC_IMX27 */
 
+#ifdef CONFIG_SOC_IMX31
+const struct imx_mxc_mmc_data imx31_mxc_mmc_data[] __initconst = {
+#define imx31_mxc_mmc_data_entry(_id, _hwid)				\
+	imx_mxc_mmc_data_entry(MX31, _id, _hwid, SZ_16K)
+	imx31_mxc_mmc_data_entry(0, 1),
+	imx31_mxc_mmc_data_entry(1, 2),
+};
+#endif /* ifdef CONFIG_SOC_IMX31 */
+
 struct platform_device *__init imx_add_mxc_mmc(
 		const struct imx_mxc_mmc_data *data,
 		const struct imxmmc_platform_data *pdata)