commit f218278a456b3c272b480443c89004c3d2a49f18
author Pierre Ossman <drzeus-list@drzeus.cx> Tue Sep 06 15:18:55 2005 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> Wed Sep 07 16:57:51 2005 -0700
tree 8d9558816488311e06a7ad2434e342418f2c79d5
parent a9c4342beb4cd28b3a05c3401195e2536c37c150

[PATCH] sd: SD 4-bit bus

Infrastructure for 4-bit bus transfers with SD cards.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/mmc/protocol.h

diff --git a/include/linux/mmc/protocol.h b/include/linux/mmc/protocol.h
index 8963428..f819cae 100644
--- a/include/linux/mmc/protocol.h
+++ b/include/linux/mmc/protocol.h
@@ -236,5 +236,12 @@
 #define CSD_SPEC_VER_2      2           /* Implements system specification 2.0 - 2.2 */
 #define CSD_SPEC_VER_3      3           /* Implements system specification 3.1 */
 
+
+/*
+ * SD bus widths
+ */
+#define SD_BUS_WIDTH_1      0
+#define SD_BUS_WIDTH_4      2
+
 #endif  /* MMC_MMC_PROTOCOL_H */