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>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/Makefile b/lib/Makefile
index 0166fbc0fa81..90cf124e5feb 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -99,6 +99,7 @@ obj-$(CONFIG_CRC_T10DIF)+= crc-t10dif.o
 obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o
 obj-$(CONFIG_CRC32)     += crc32.o
 obj-$(CONFIG_CRC32_SELFTEST)    += crc32test.o
+obj-$(CONFIG_CRC4)      += crc4.o
 obj-$(CONFIG_CRC7)      += crc7.o
 obj-$(CONFIG_LIBCRC32C) += libcrc32c.o
 obj-$(CONFIG_CRC8)      += crc8.o