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c3266af101
The Cypress Semper flash is an xSPI compliant octal DTR flash. Add support for using it in octal DTR mode. The flash by default boots in a hybrid sector mode. But the sector map table on the part I had was programmed incorrectly and the SMPT values on the flash don't match the public datasheet. Specifically, in some places erase type 3 was used instead of 4. In addition, the region sizes were incorrect in some places. So, for testing I set CFR3N[3] to enable uniform sector sizes. Since the uniform sector mode bit is a non-volatile bit, this series does not change it to avoid making any permanent changes to the flash configuration. The correct data to implement a fixup is not available right now and will be done in a follow-up patch if needed. Signed-off-by: Pratyush Yadav <p.yadav@ti.com> [vigneshr@ti.com: Drop unnecessary sleep in Octal DTR switch sequence] Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com> Link: https://lore.kernel.org/r/20201005153138.6437-15-p.yadav@ti.com |
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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.