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CRC7 support

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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>
This commit is contained in:
Jan Nikitenko
2007-07-17 04:04:03 -07:00
committed by Linus Torvalds
parent c06e677aed
commit ad241528c4
5 changed files with 94 additions and 1 deletions
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14
include/linux/crc7.h Normal file
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@@ -0,0 +1,14 @@
#ifndef _LINUX_CRC7_H
#define _LINUX_CRC7_H
#include <linux/types.h>
extern const u8 crc7_syndrome_table[256];
static inline u8 crc7_byte(u8 crc, u8 data)
{
return crc7_syndrome_table[(crc << 1) ^ data];
}
extern u8 crc7(u8 crc, const u8 *buffer, size_t len);
#endif