From 0cbaa44841db3d06d2a21ae4ab679882033f3dbe Mon Sep 17 00:00:00 2001
From: Jeremy Kerr <jk@ozlabs.org>
Date: Tue, 6 Jun 2017 16:08:39 -0500
Subject: lib: Add crc4 module

Add a little helper for crc4 calculations. This works 4-bits-at-a-time,
using a simple table approach.

We will need this in the FSI core code, as well as any master
implementations that need to calculate CRCs in software.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Chris Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/linux/crc4.h | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 include/linux/crc4.h

(limited to 'include/linux/crc4.h')

diff --git a/include/linux/crc4.h b/include/linux/crc4.h
new file mode 100644
index 000000000000..8f739f1d794f
--- /dev/null
+++ b/include/linux/crc4.h
@@ -0,0 +1,8 @@
+#ifndef _LINUX_CRC4_H
+#define _LINUX_CRC4_H
+
+#include <linux/types.h>
+
+extern uint8_t crc4(uint8_t c, uint64_t x, int bits);
+
+#endif /* _LINUX_CRC4_H */
-- 
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