EFI FLASHING: Can’t Read Flash Chip


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6 years 3 months ago #9244 by JayMac87
Hello Everyone.
I am trying to Flash The EFI Chip in my late 2012 MacBook Pro 13”. EMC - 2554. Model Number - A1278.

I Am Using A Raspberry 3 Model B, 10cm Female To Female GPIO wires, SOIC8 Clip and I have followed Ghostlyhaks instructions on flashing the EFI.

I used to following comment:
Sudo Flashrom -r /efi/read1.bin -V -p linux_spi:dev=/dev/spidev0.0

I have gotten the response back that says: Found Generic Flash Chip “unknown SPI Chip (RDID)” (0 kB, SPI) === this flash part has status NOT WORKING for operations: PROBE READ ERASE WRITE. The test status of this check may have been updated in the latest development version of Flashrom. If you are running the latest development version, please email the report to if any of the above operations work correctly for you with this flash chip. Please include the flashrom log file for all operations you tested ( see the main page for details ), and mention which mainboard what program are you tested in the subject line. Thanks for your help. READ IS NOT WORKING ON THIS CHIP. ABORTING.
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6 years 1 month ago #9559 by 0E800

JayMac87 wrote: I used to following comment:
Sudo Flashrom -r /efi/read1.bin -V -p linux_spi:dev=/dev/spidev0.0


Change:
sudo Flashrom -r /efi/read1.bin -V -p linux_spi:dev=/dev/spidev0.0

To:

sudo Flashrom -r /efi/read1.bin -V -p linux_spi:dev=/dev/spidev0.0,spispeed=8000

Note the appending ,spidpeed=8000
(ref: github.com/flashrom/flashrom/issues/29)
The following user(s) said Thank You: PW.Steal

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