From: Aaron Sierra <asierra@xes-inc.com>
Date: Thu, 25 Sep 2014 17:20:24 +0000 (-0500)
Subject: mtd: map_rom: Support UBI on ROM
X-Git-Tag: fixes-v4.0-rc1~67^2~30
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6958024ad5cdd78deae4da47a8722b06317dff45;p=pandora-kernel.git

mtd: map_rom: Support UBI on ROM

UBI needs to know the physical erase block size, even on read-only
devices, since it defines the on-device layout. Use a device-tree
provided value to support previously written UBI on read-only NOR.

UBI also needs a non-zero writebufsize, so we set it to one.

Note: This was implemented because hardware write-protected CFI
      NOR cannot be probed for the physical erase block size.

Signed-off-by: Joe Schultz <jschultz@xes-inc.ccom>
Signed-off-by: Aaron Sierra <asierra@xes-inc.ccom>
[Brian: removed unneeded #ifdef, note 'optional' erase-size property]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---

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