Just tested this EPROM and it's writing, reading, erasing great.
root@server:~# flashrom -p rayer_spi -w binary.bin
flashrom v0.9.5.2-r1517 on Linux 3.2.0-37-generic (x86_64), built with libpci 3.1.8, GCC 4.6.3, little endian
Calibrating delay loop... OK.
Found Eon flash chip "EN25Q64" (8192 kB, SPI) on rayer_spi.
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This flash part has status UNTESTED for operations: PROBE READ ERASE WRITE
The test status of this chip may have been updated in the latest development
version of flashrom. If you are running the latest development version,
work correctly for you with this flash part. Please include the flashrom
output with the additional -V option for all operations you tested (-V, -Vr,
-VE, -Vw), and mention which mainboard or programmer you tested.
Please mention your board in the subject line. Thanks for your help!
Reading old flash chip contents... done.
Erasing and writing flash chip... Erase/write done.
Verifying flash... VERIFIED.