From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Tue, 20 Aug 2013 07:54:40 +0000 (+0200)
Subject: mtd: m25p80: make CONFIG_M25PXX_USE_FAST_READ safe to enable
X-Git-Tag: v3.12-rc1~82^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=58146992c956c2104ca8990a621e39a20e9c9f94;p=pandora-kernel.git

mtd: m25p80: make CONFIG_M25PXX_USE_FAST_READ safe to enable

This patch adds a flag to struct flash_info indicating that
fast_read is not supported. This now gives the following logic
when determing whether to enable fastread:

If the flash chip does not support fast_read, then disable it.
Otherwise:
1) enable fast_read if device node contains m25p,fast-read
2) enable fast_read if forced in Kconfig

This makes enabling CONFIG_M25PXX_USE_FAST_READ a safe option
since we no longer enable the fast_read option unconditionally.

For now fast_read is disabled for the everspin mr25h256 and the
catalyst devices. Others may need the flag aswell.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---

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