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Quoting from the datasheet for S25FL064P, rev. 05, Nov 18 2011, § 9.17: "A 64 kB[sic] sector erase (D8h) command issued on 4 kB or 8 kB erase sectors will erase all sectors in the specified 64 kB region. However, please note that a 4 kB sector erase (20h) or 8 kB sector erase (40h) command will not work on a 64 kB sector." Referring further to Table 8.1 and Table 8.2, it is clearly seen that most of the sectors are 64KiB; therefore disable this 4KiB erase support since it's valid only on first/last sectors. Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>