[Bug 1734147] Re: Ubuntu 17.10 corrupting BIOS - many LENOVO laptops models

[Paul Sladen]

Register map documentation for the SPI (Serial Peripheral Interface) in
recent Intels begins on page 5626

https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/atom-z8000
-datasheet-vol-2.pdf

HSFSTS (Hardware Sequencer Status) + HSFCTL (Hardware Sequencer Control)
are covered on the following pages.  The 'intel-spi' driver accesses
both of these together, treating them as a single 32-bit register
(HSFSTS_CTL).

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PS. For those watching this bug, and wondering about what whatelse is
going on in the background.  Yes there is, eg. per #ubuntu-devel
yesterday, today should be a visit to hardware manufacture (ODM), to try
out some suggestions received via Intel:

  https://irclogs.ubuntu.com/2017/12/20/%23ubuntu-devel.html#t16:38

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Title:
  Ubuntu 17.10 corrupting BIOS - many LENOVO laptops models

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