From f218278a456b3c272b480443c89004c3d2a49f18 Mon Sep 17 00:00:00 2001
From: Pierre Ossman <drzeus-list@drzeus.cx>
Date: Tue, 6 Sep 2005 15:18:55 -0700
Subject: [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 | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'include/linux/mmc/protocol.h')

diff --git a/include/linux/mmc/protocol.h b/include/linux/mmc/protocol.h
index 896342817b9..f819cae9226 100644
--- a/include/linux/mmc/protocol.h
+++ b/include/linux/mmc/protocol.h
@@ -236,5 +236,12 @@ struct _mmc_csd {
 #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 */
 
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