tree 68c1d560242821885e66578bca46a1e6c68eb36c
parent 6dc1d3b8dc6bd226bb2530c7af8d109407faa056
author Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> 1210821589 +0000
committer Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> 1210821589 +0000

Add support for the JEDEC RES

Add support for the JEDEC RES (Read Electronic Signature and Resume from
Powerdown) SPI command to identify older SPI chips which can't handle
JEDEC RDID.

Since RES gives a one-byte identifier which is shared among many
different vendors and even different sizes, we want to match RES as a
last resort if RDID returns 0xff 0xff 0xff.

Corresponding to flashrom svn r235 and coreboot v2 svn r3320.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Peter Stuge <peter@stuge.se>

This is a heavily reworked version of a patch by Fredrik Tolf, which was
Signed-off-by: Fredrik Tolf <fredrik@dolda2000.com>