From: Pekon Gupta <pekon@ti.com>
Date: Thu, 20 Mar 2014 13:18:34 +0000 (+0530)
Subject: mtd: devices: elm: check for hardware engine's design constraints
X-Git-Tag: v3.15-rc1~65^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3f4eb14bdbe148fcc3a8e02f506ccc9b8c955ad4;p=pandora-kernel.git

mtd: devices: elm: check for hardware engine's design constraints

ELM hardware engine is used by BCH ecc-schemes for detecting and locating ECC
errors. This patch adds the following checks for ELM hardware engine:

 - ELM internal buffers are of 1K,
   so it cannot process data with ecc-step-size > 1K.

 - ELM engine can execute upto maximum of 8 threads in parallel,
   so in *page-mode* (when complete page is processed in single iteration),
   ELM cannot support ecc-steps > 8.

Signed-off-by: Pekon Gupta <pekon@ti.com>
Reviewed-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---

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