From: Brian Norris <computersforpeace@gmail.com>
Date: Thu, 14 Nov 2013 22:41:32 +0000 (-0800)
Subject: mtd: nand: pxa3xx: make ECC configuration checks more explicit
X-Git-Tag: v3.14-rc1~65^2~116
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6033a949b2c466a13e84daebd99fdca5960b4db5;p=pandora-kernel.git

mtd: nand: pxa3xx: make ECC configuration checks more explicit

The Armada BCH configuration in this driver uses one of the two
following ECC schemes:

 16-bit correction per 2048 bytes
 16-bit correction per 1024 bytes

These are sufficient for mapping to the 4-bit per 512-bytes and 8-bit
per 512-bytes (respectively) minimum correctability requirements of many
common NAND.

The current code only checks for the required strength (4-bit or 8-bit)
without checking the ECC step size that is associated with that strength
(and simply assumes it is 512). While that is often a safe assumption to
make, let's make it explicit, since we have that information.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
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