diff options
author | Jan Nikitenko <jan.nikitenko@gmail.com> | 2007-07-17 07:04:03 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-17 13:23:04 -0400 |
commit | ad241528c4919505afccb022acbab3eeb0db4d80 (patch) | |
tree | ec3a2a65707ca032eab973f98aa568ed007389f1 /include/linux | |
parent | c06e677aed0c86480b01faa894967daa8aa3568a (diff) |
CRC7 support
Add CRC7 routines, used for example in MMC over SPI communication.
Kerneldoc updates
[akpm@linux-foundation.org: fix funny mix of const and non-const]
Signed-off-by: Jan Nikitenko <jan.nikitenko@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/crc7.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/crc7.h b/include/linux/crc7.h new file mode 100644 index 000000000000..1786e772d5c6 --- /dev/null +++ b/include/linux/crc7.h | |||
@@ -0,0 +1,14 @@ | |||
1 | #ifndef _LINUX_CRC7_H | ||
2 | #define _LINUX_CRC7_H | ||
3 | #include <linux/types.h> | ||
4 | |||
5 | extern const u8 crc7_syndrome_table[256]; | ||
6 | |||
7 | static inline u8 crc7_byte(u8 crc, u8 data) | ||
8 | { | ||
9 | return crc7_syndrome_table[(crc << 1) ^ data]; | ||
10 | } | ||
11 | |||
12 | extern u8 crc7(u8 crc, const u8 *buffer, size_t len); | ||
13 | |||
14 | #endif | ||