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f732646d0cThe at91 QSPI IP uses a default value of half of the period of the QSPI clock period for the cs-setup time, which is not always enough, an example being the sst26vf064b SPI NOR flash which requires a minimum cs-setup time of 5 ns. It was observed that none of the at91 SoCs can fulfill the minimum CS setup time for the aforementioned flash, as they operate at high frequencies and half a period does not suffice for the required CS setup time. Add support for configuring the CS timing in the controller. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Link: https://lore.kernel.org/r/20221117105249.115649-5-tudor.ambarus@microchip.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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| fs | ||
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| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
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| .clang-format | ||
| .cocciconfig | ||
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| .mailmap | ||
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| README | ||
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.