mtd: nand: denali: allow to override revision number

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Commit 271707b1d8 ("mtd: nand: denali: max_banks calculation
changed in revision 5.1") added a revision check to support the
new max_banks encoding.  Its git-log states "The encoding of
max_banks changed in Denali revision 5.1".

There are exceptional cases, for example, the revision register on
some UniPhier SoCs says the IP is 5.0 but the max_banks is encoded
in the new format.

This IP updates the resister specification from time to time (often
breaking the backward compatibility), but the revision number is not
incremented correctly.

The max_banks is not only the case that needs revision checking.
Let's allow to override an incorrect revision number.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

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This commit is contained in:

Masahiro Yamada 2017-03-30 15:45:57 +09:00 • committed by Boris Brezillon

parent 3f5c35819f

commit e7beeeec85

3 changed files with 18 additions and 13 deletions

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23

drivers/mtd/nand/denali.c

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3

drivers/mtd/nand/denali.h

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5

drivers/mtd/nand/denali_dt.c

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