mtd: nand: denali: fix setup_data_interface to meet tCCS delay

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The WE_2_RE register specifies the number of clock cycles inserted
between the rising edge of #WE and the falling edge of #RE.

The current setup_data_interface implementation takes care of tWHR,
but tCCS is missing.  Wait for max(tCSS, tWHR) to meet the spec.

With setup_data_interface() properly programmed, the Denali NAND
controller can observe the timing, so NAND_WAIT_TCCS flag is unneeded.
Clarify this in the comment block.

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

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Masahiro Yamada 2017-09-29 23:12:57 +09:00 • committed by Boris Brezillon

parent 263c68afb5

commit 7963f58cbf

1 changed files with 8 additions and 2 deletions

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drivers/mtd/nand/denali.c

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