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The Octal DTR configuration is stored in the CFR0V register. This register is 1 byte wide. But 1 byte long transactions are not allowed in 8D-8D-8D mode. The next byte address contains the CFR1V register, which contains the number of dummy cycles. This is very fortunate since the enable path changes the value of this register. Reset the value to its default when disabling Octal DTR mode. This way, both changes to the flash state made when enabling can be reverted in one single transaction. Signed-off-by: Pratyush Yadav <p.yadav@ti.com> Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Link: https://lore.kernel.org/r/20210531181757.19458-4-p.yadav@ti.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.