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s25f.c: implement probing and block erasers for Spansion
This adds support for Spansion 25Fxxxxx chips. These chips require their own probing logic because the first 6 bytes returned by RDID must be examined to identify the chip. New erase functions are required as the chips support multiple sector layouts, and the default layout must be changed to be able to erase the entire flash. Adapted from cros flashrom at `9c4c9a56b6a0370b383df9c75d71b3bd469e672d`. BUG=b:153800073 TEST=builds Signed-off-by: Nikolai Artemiev <nartemiev@google.com> Change-Id: I2d23f9c36ce8b2959807fbeee7f60e02444e3763 Reviewed-on: https://review.coreboot.org/c/flashrom/+/46140 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
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