1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 6711eb8715ba..c4fb1c5efc44 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -50,6 +50,11 @@ struct mmc_ios {
 #define MMC_TIMING_LEGACY       0
 #define MMC_TIMING_MMC_HS       1
 #define MMC_TIMING_SD_HS        2
+
+        unsigned char   ddr;                    /* dual data rate used */
+
+#define MMC_SDR_MODE            0
+#define MMC_DDR_MODE            1
 };
 
 struct mmc_host_ops {