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lib: Add crc4 module

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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 <[email protected]>
Signed-off-by: Chris Bostic <[email protected]>
Signed-off-by: Joel Stanley <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Jeremy Kerr 2017-06-06 16:08:39 -05:00 • committed by Greg Kroah-Hartman
commit 0cbaa44841
4 changed files with 63 additions and 0 deletions
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8
lib/Kconfig
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@ -158,6 +158,14 @@ config CRC32_BIT
endchoice
config CRC4
tristate "CRC4 functions"
help
This option is provided for the case where no in-kernel-tree
modules require CRC4 functions, but a module built outside
the kernel tree does. Such modules that use library CRC4
functions require M here.
config CRC7
tristate "CRC7 functions"
help