diff --git a/include/linux/mmc/sd.h b/include/linux/mmc/sd.h
index 3fd85e0..c648878 100644
--- a/include/linux/mmc/sd.h
+++ b/include/linux/mmc/sd.h
@@ -17,6 +17,7 @@
 /* This is basically the same command as for MMC with some quirks. */
 #define SD_SEND_RELATIVE_ADDR     3   /* bcr                     R6  */
 #define SD_SEND_IF_COND           8   /* bcr  [11:0] See below   R7  */
+#define SD_SWITCH_VOLTAGE         11  /* ac                      R1  */
 
   /* class 10 */
 #define SD_SWITCH                 6   /* adtc [31:0] See below   R1  */
@@ -32,6 +33,12 @@
 #define SD_APP_OP_COND           41   /* bcr  [31:0] OCR         R3  */
 #define SD_APP_SEND_SCR          51   /* adtc                    R1  */
 
+/* OCR bit definitions */
+#define SD_OCR_S18R		(1 << 24)    /* 1.8V switching request */
+#define SD_ROCR_S18A		SD_OCR_S18R  /* 1.8V switching accepted by card */
+#define SD_OCR_XPC		(1 << 28)    /* SDXC power control */
+#define SD_OCR_CCS		(1 << 30)    /* Card Capacity Status */
+
 /*
  * SD_SWITCH argument format:
  *