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The Flash Interface Unit (FIU) is the SPI flash controller in the Nuvoton WPCM450 BMC SoC. It supports four chip selects, and direct (memory-mapped) access to 16 MiB per chip. Larger flash chips can be accessed by software-defined SPI transfers. The FIU in newer NPCM7xx SoCs is not compatible with the WPCM450 FIU. Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Link: https://lore.kernel.org/r/20221124191400.287918-3-j.neuschaefer@gmx.net Signed-off-by: Mark Brown <broonie@kernel.org>
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.