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0586b53d4aDifferent ASPEED SoCs have specific limitations on SPI address decoding, such as total range size, minimum window size per CS, and alignment requirements. The original adjustment logic only handles simple cases and could fail in more complex setups found in advanced board designs, e.g., small flash on CS0 and large flash on CS1, or when the total physical flash size exceeds the decoding range supported by the SPI controller. This patch introduces a per-platform adjust_window callback to handle these constraints properly. Each platform defines its own logic to adjust decoding ranges, trim excess size, and ensure alignment. If trimming is required, the affected CS will fall back to user mode access to ensure the entire flash remains accessible from the MTD layer. Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com> Link: https://patch.msgid.link/20251001112605.1130723-6-chin-ting_kuo@aspeedtech.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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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 reStructuredText 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.