diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 8c5f713..6014160 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -57,6 +57,11 @@
 #define MMC_POWER_OFF		0
 #define MMC_POWER_UP		1
 #define MMC_POWER_ON		2
+
+	unsigned char	bus_width;		/* data bus width */
+
+#define MMC_BUS_WIDTH_1		0
+#define MMC_BUS_WIDTH_4		2
 };
 
 struct mmc_host_ops {
@@ -77,6 +82,10 @@
 	unsigned int		f_max;
 	u32			ocr_avail;
 
+	unsigned long		caps;		/* Host capabilities */
+
+#define MMC_CAP_4_BIT_DATA	(1 << 0)	/* Can the host do 4 bit transfers */
+
 	/* host specific block data */
 	unsigned int		max_seg_size;	/* see blk_queue_max_segment_size */
 	unsigned short		max_hw_segs;	/* see blk_queue_max_hw_segments */