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lib: import bitrev library from the linux kernel

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This patch adds the bitrev library from the linux kernel.  This is a simple
algorithm that uses an 8 bit look-up table to reverse the bits in data types of
8, 16, or 32 bit widths.  The docg4 nand flash driver uses it.

[port from linux kernel v3.9 commit 7ee32a6d30d1c8a3b7a07a6269da8f0a08662927]
[originally added: v2.6.20 by commit a5cfc1ec58a07074dacb6aa8c79eff864c966d12]

Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
This commit is contained in:
Mike Dunn
2013-04-12 11:59:17 -07:00
committed by Marek Vasut
parent 5ed6f447af
commit 0dd9c7a924
3 changed files with 83 additions and 0 deletions
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lib/Makefile
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@@ -55,6 +55,7 @@ COBJS-$(CONFIG_SHA256) += sha256.o
COBJS-y += strmhz.o
COBJS-$(CONFIG_TPM) += tpm.o
COBJS-$(CONFIG_RBTREE) += rbtree.o
COBJS-$(CONFIG_BITREVERSE) += bitrev.o
endif
ifdef CONFIG_SPL_BUILD